Hi,

currently I'm using ffmpeg like this

exec $ffmpeg_exe -y -r $fps -hide_banner -f concat -safe 0 -i $txtfile -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" $rootname.avi

to create AVI from multiple PNGs.

The issue is, that the video quality is quite bad. I have the feeling that somehow there is some blure when interpolating between frames. Does anybody know a better way? Or are there other tricks in ffmpeg to improve the quality?

Thanks
Alexandru

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Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 14:30:33 UTC+3:

Am 11.08.22 um 13:07 schrieb Alexandru:

Hi,

currently I'm using ffmpeg like this

exec $ffmpeg_exe -y -r $fps -hide_banner -f concat -safe 0 -i $txtfile -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" $rootname.avi

to create AVI from multiple PNGs.

The issue is, that the video quality is quite bad.

This is not a Tcl question, but an ffmpeg question. Try to find a ffmpeg forum. There are settings and other quality options specific to the
codec used. There is a lot of information e.g. hee: https://trac.ffmpeg.org/wiki

Or try to google for recommended settings.

Christian

Did that, invested a lot of time in twiking.
The question is Tcl related, maybe there is another Tcl solution that can create AVI from PNG.

--- SoupGate-Win32 v1.05
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Am 11.08.22 um 13:07 schrieb Alexandru:

Hi,

currently I'm using ffmpeg like this

exec $ffmpeg_exe -y -r $fps -hide_banner -f concat -safe 0 -i $txtfile -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" $rootname.avi

to create AVI from multiple PNGs.

The issue is, that the video quality is quite bad.

This is not a Tcl question, but an ffmpeg question. Try to find a ffmpeg
forum. There are settings and other quality options specific to the
codec used. There is a lot of information e.g. hee: https://trac.ffmpeg.org/wiki

Or try to google for recommended settings.

Christian

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Am 11.08.2022 um 14:56 schrieb Christian Gollwitzer:

Am 11.08.22 um 13:33 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um
14:30:33 UTC+3:

Am 11.08.22 um 13:07 schrieb Alexandru:

Hi,

currently I'm using ffmpeg like this

exec $ffmpeg_exe -y -r $fps -hide_banner -f concat -safe 0 -i
$txtfile -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" $rootname.avi

to create AVI from multiple PNGs.

The issue is, that the video quality is quite bad.

This is not a Tcl question, but an ffmpeg question. Try to find a ffmpeg >>> forum. There are settings and other quality options specific to the
codec used. There is a lot of information e.g. hee:
https://trac.ffmpeg.org/wiki

Or try to google for recommended settings.

Christian

Did that, invested a lot of time in twiking.

OK. The line you put there does not look like this. There are no options
for the codec and no quality settings.

The question is Tcl related, maybe there is another Tcl solution that
can create AVI from PNG.

Unlikely. FFMpeg is the one big solution powering all of the major open source video coding / playing software like VLC or video editors. That's
why I suggested to find the right settings.

1) are you sure you want .avi? Usually it is -mp4 these days. But that doesn't imply quality

2) Do you have still images with a slow framerate (slideshow) or more a movie? What is your size / quality tradeoff? E.g. you could use a MPNG
or MJPEG codec to get very good quality for the indiviudal images, but
it will then be as large as the set of PNG or JPG files combined.

I usually encode to H.264 as this is universally supported now, even on phones. "-c:v libx264 -pix_fmt yuv420p" (the pix_fmt is necessary for
Apple hardware)

    Christian

Just as a side not: if it is to show a slide show on a web browser, one
may also stream the images one after the other (PNG, GIF, JPEG). The
browser will show it like a film.
I used this option in the past with a camera live image directly from
the sensor.

Take care,
Harald

--- SoupGate-Win32 v1.05
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Am 11.08.22 um 13:33 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 14:30:33 UTC+3:

Am 11.08.22 um 13:07 schrieb Alexandru:

Hi,

currently I'm using ffmpeg like this

exec $ffmpeg_exe -y -r $fps -hide_banner -f concat -safe 0 -i $txtfile -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" $rootname.avi

to create AVI from multiple PNGs.

The issue is, that the video quality is quite bad.

This is not a Tcl question, but an ffmpeg question. Try to find a ffmpeg
forum. There are settings and other quality options specific to the
codec used. There is a lot of information e.g. hee:
https://trac.ffmpeg.org/wiki

Or try to google for recommended settings.

Christian

Did that, invested a lot of time in twiking.

OK. The line you put there does not look like this. There are no options
for the codec and no quality settings.

The question is Tcl related, maybe there is another Tcl solution that can create AVI from PNG.

Unlikely. FFMpeg is the one big solution powering all of the major open
source video coding / playing software like VLC or video editors. That's
why I suggested to find the right settings.

1) are you sure you want .avi? Usually it is -mp4 these days. But that
doesn't imply quality

2) Do you have still images with a slow framerate (slideshow) or more a
movie? What is your size / quality tradeoff? E.g. you could use a MPNG
or MJPEG codec to get very good quality for the indiviudal images, but
it will then be as large as the set of PNG or JPG files combined.

I usually encode to H.264 as this is universally supported now, even on
phones. "-c:v libx264 -pix_fmt yuv420p" (the pix_fmt is necessary for
Apple hardware)

Christian

--- SoupGate-Win32 v1.05
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Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 15:56:24 UTC+3:

Am 11.08.22 um 13:33 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 14:30:33 UTC+3:

Am 11.08.22 um 13:07 schrieb Alexandru:

Hi,

currently I'm using ffmpeg like this

exec $ffmpeg_exe -y -r $fps -hide_banner -f concat -safe 0 -i $txtfile -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" $rootname.avi

to create AVI from multiple PNGs.

The issue is, that the video quality is quite bad.

This is not a Tcl question, but an ffmpeg question. Try to find a ffmpeg >> forum. There are settings and other quality options specific to the
codec used. There is a lot of information e.g. hee:
https://trac.ffmpeg.org/wiki

Or try to google for recommended settings.

Christian

Did that, invested a lot of time in twiking.

OK. The line you put there does not look like this. There are no options
for the codec and no quality settings.

The question is Tcl related, maybe there is another Tcl solution that can create AVI from PNG.

Unlikely. FFMpeg is the one big solution powering all of the major open source video coding / playing software like VLC or video editors. That's
why I suggested to find the right settings.

1) are you sure you want .avi? Usually it is -mp4 these days. But that doesn't imply quality

I remember I tried MP4, no better.

2) Do you have still images with a slow framerate (slideshow) or more a movie? What is your size / quality tradeoff? E.g. you could use a MPNG
or MJPEG codec to get very good quality for the indiviudal images, but
it will then be as large as the set of PNG or JPG files combined.

I'm very unsure about codecs, and some of them lead to trubbles when inserting the video into PowerPoint. Not sure how compatible they are also on differend Windows machines.

I usually encode to H.264 as this is universally supported now, even on phones. "-c:v libx264 -pix_fmt yuv420p" (the pix_fmt is necessary for
Apple hardware)

Ok, I'll try that again.

Christian

--- SoupGate-Win32 v1.05
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Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 15:56:24 UTC+3:

Am 11.08.22 um 13:33 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 14:30:33 UTC+3:

Am 11.08.22 um 13:07 schrieb Alexandru:

Hi,

currently I'm using ffmpeg like this

exec $ffmpeg_exe -y -r $fps -hide_banner -f concat -safe 0 -i $txtfile -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" $rootname.avi

to create AVI from multiple PNGs.

The issue is, that the video quality is quite bad.

This is not a Tcl question, but an ffmpeg question. Try to find a ffmpeg >> forum. There are settings and other quality options specific to the
codec used. There is a lot of information e.g. hee:
https://trac.ffmpeg.org/wiki

Or try to google for recommended settings.

Christian

Did that, invested a lot of time in twiking.

OK. The line you put there does not look like this. There are no options
for the codec and no quality settings.

The question is Tcl related, maybe there is another Tcl solution that can create AVI from PNG.

Unlikely. FFMpeg is the one big solution powering all of the major open source video coding / playing software like VLC or video editors. That's
why I suggested to find the right settings.

1) are you sure you want .avi? Usually it is -mp4 these days. But that doesn't imply quality

2) Do you have still images with a slow framerate (slideshow) or more a movie? What is your size / quality tradeoff? E.g. you could use a MPNG
or MJPEG codec to get very good quality for the indiviudal images, but
it will then be as large as the set of PNG or JPG files combined.

I usually encode to H.264 as this is universally supported now, even on phones. "-c:v libx264 -pix_fmt yuv420p" (the pix_fmt is necessary for
Apple hardware)

Christian

I tried a lot, but may it's because there are so many options I didn't get the right ones.
But I also suppose there could be an issue with the number of PNGs. There are only 10 PNGs. The frame rate is fps=5.

--- SoupGate-Win32 v1.05
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Alexandru <alexandru.dadalau@meshparts.de> wrote:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 15:56:24 UTC+3:

Am 11.08.22 um 13:33 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 14:30:33 UTC+3:

Am 11.08.22 um 13:07 schrieb Alexandru:

Hi,

currently I'm using ffmpeg like this

exec $ffmpeg_exe -y -r $fps -hide_banner -f concat -safe 0 -i $txtfile -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" $rootname.avi

to create AVI from multiple PNGs.

The issue is, that the video quality is quite bad.

This is not a Tcl question, but an ffmpeg question. Try to find a ffmpeg >> >> forum. There are settings and other quality options specific to the
codec used. There is a lot of information e.g. hee:
https://trac.ffmpeg.org/wiki

Or try to google for recommended settings.

Christian

Did that, invested a lot of time in twiking.

OK. The line you put there does not look like this. There are no options
for the codec and no quality settings.

The question is Tcl related, maybe there is another Tcl solution that can create AVI from PNG.

Unlikely. FFMpeg is the one big solution powering all of the major open
source video coding / playing software like VLC or video editors. That's
why I suggested to find the right settings.

1) are you sure you want .avi? Usually it is -mp4 these days. But that
doesn't imply quality

2) Do you have still images with a slow framerate (slideshow) or more a
movie? What is your size / quality tradeoff? E.g. you could use a MPNG
or MJPEG codec to get very good quality for the indiviudal images, but
it will then be as large as the set of PNG or JPG files combined.

I usually encode to H.264 as this is universally supported now, even on
phones. "-c:v libx264 -pix_fmt yuv420p" (the pix_fmt is necessary for
Apple hardware)

Christian

I tried a lot, but may it's because there are so many options I
didn't get the right ones. But I also suppose there could be an
issue with the number of PNGs. There are only 10 PNGs. The frame
rate is fps=5.

The number of PNG's will not make any significant difference.

The selected video compression algorithm, and the multitude of
quantization and bitrate knobs you can tweak for the selected video
compression algorithm, is what makes the difference. And, sadly, the
defaults, if you don't specify values for enough of the knobs, are
often such that very poor results come out of the process.

But, the number of knobs you can tweak for most of them is on a level
of complexity of a professional audio mixing board (hundreds of knobs
all lined up that can be tweaked).

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Alexandru <alexandru.dadalau@meshparts.de> wrote:

I'm very unsure about codecs, and some of them lead to trubbles when inserting the video into PowerPoint. Not sure how compatible they
are also on differend Windows machines.

If you also need to be able to insert the video into powerpoint, and
have it "play" as a video, then you'll need to encode the video in a
format compatible with powerpoint (yes, I've just stated the obvious).

Unfortunately, our Tcl newsgroup here is unlikely to also have a
"powerpoint guru" in attendance who would know the details with which
to advise you as to how to encode it to be "powerpoint compatible".

--- SoupGate-Win32 v1.05
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Alexandru <alexandru.dadalau@meshparts.de> wrote:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 14:30:33 UTC+3:

Am 11.08.22 um 13:07 schrieb Alexandru:

Hi,

currently I'm using ffmpeg like this

exec $ffmpeg_exe -y -r $fps -hide_banner -f concat -safe 0 -i $txtfile -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" $rootname.avi

to create AVI from multiple PNGs.

The issue is, that the video quality is quite bad.

This is not a Tcl question, but an ffmpeg question. Try to find a ffmpeg
forum. There are settings and other quality options specific to the
codec used. There is a lot of information e.g. hee:
https://trac.ffmpeg.org/wiki

Or try to google for recommended settings.

Christian

Did that, invested a lot of time in twiking.
The question is Tcl related, maybe there is another Tcl solution that
can create AVI from PNG.

No, the question is "digital video encoding" related. You just happen
to be using Tcl to launch the encoder.

--- SoupGate-Win32 v1.05
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Am 11.08.22 um 15:12 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 15:56:24 UTC+3:

I usually encode to H.264 as this is universally supported now, even on
phones. "-c:v libx264 -pix_fmt yuv420p" (the pix_fmt is necessary for
Apple hardware)

I tried a lot, but may it's because there are so many options I didn't get the right ones.
But I also suppose there could be an issue with the number of PNGs. There are only 10 PNGs. The frame rate is fps=5.

OK so this means that you don't care about the file size, but instead
want the highest possibel quality. Try this:

ffmpeg -r 5 -i frame_%03d.png -c:v libx264 -crf 17 -pix_fmt yuv420p
output.mp4

(assuming your images are called frame_001.png, frame_002.png, ....)

The crf option sets the quality, lower is better. The resulting file
should play on major platforms / devices. -crf 0 would be lossless but
that does usually not play everywhere.

Christian

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Am 11.08.2022 um 15:58 schrieb Rich:

Alexandru <alexandru.dadalau@meshparts.de> wrote:

I'm very unsure about codecs, and some of them lead to trubbles when
inserting the video into PowerPoint. Not sure how compatible they
are also on differend Windows machines.

If you also need to be able to insert the video into powerpoint, and
have it "play" as a video, then you'll need to encode the video in a
format compatible with powerpoint (yes, I've just stated the obvious).

Unfortunately, our Tcl newsgroup here is unlikely to also have a
"powerpoint guru" in attendance who would know the details with which
to advise you as to how to encode it to be "powerpoint compatible".

PowerPoint itself supports creation of video files, which then of course can be read by PowerPoint.
You can automate the video creation via CAWT, see test script Ppt-14_CreateVideo.tcl.

Paul, the PowerPoint Tcl guru.

--- SoupGate-Win32 v1.05
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Paul Obermeier schrieb am Donnerstag, 11. August 2022 um 19:50:31 UTC+3:

Am 11.08.2022 um 15:58 schrieb Rich:

Alexandru <alexandr...@meshparts.de> wrote:

I'm very unsure about codecs, and some of them lead to trubbles when
inserting the video into PowerPoint. Not sure how compatible they
are also on differend Windows machines.

If you also need to be able to insert the video into powerpoint, and
have it "play" as a video, then you'll need to encode the video in a
format compatible with powerpoint (yes, I've just stated the obvious).

Unfortunately, our Tcl newsgroup here is unlikely to also have a "powerpoint guru" in attendance who would know the details with which
to advise you as to how to encode it to be "powerpoint compatible".

PowerPoint itself supports creation of video files, which then of course can be read by PowerPoint.
You can automate the video creation via CAWT, see test script Ppt-14_CreateVideo.tcl.

Paul, the PowerPoint Tcl guru.

:) Thanks Paul. This is very interesting, I would never have thought this is possible.
One thing I've learned on this forum: It never stops to supprise me. And yes, you are the PowerPoint guru.

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Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

Am 11.08.22 um 15:12 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 15:56:24 UTC+3:

I usually encode to H.264 as this is universally supported now, even on
phones. "-c:v libx264 -pix_fmt yuv420p" (the pix_fmt is necessary for
Apple hardware)

I tried a lot, but may it's because there are so many options I didn't get the right ones.
But I also suppose there could be an issue with the number of PNGs. There are only 10 PNGs. The frame rate is fps=5.

OK so this means that you don't care about the file size, but instead
want the highest possibel quality. Try this:

ffmpeg -r 5 -i frame_%03d.png -c:v libx264 -crf 17 -pix_fmt yuv420p output.mp4

(assuming your images are called frame_001.png, frame_002.png, ....)

The crf option sets the quality, lower is better. The resulting file
should play on major platforms / devices. -crf 0 would be lossless but
that does usually not play everywhere.

Christian

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

--- SoupGate-Win32 v1.05
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Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this
-vf pad concat, textfile etc. is about. Do you have images of different
size? Are your frames not named in a logical way? I assume you generate
them from Tcl, what I would do is make a directory, put the frames in
with ascending numbers and then use the img input using the format
pattern as in my post. I tested it with a sequence of 20 images and can
play it in VLC without problems. You can find my file here: https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in
your VLC, then maybe you have a buggy version of it? It may also try to
use a hardware decoder, and perhaps there is still something in the
encoder settings that your hardware decoder does not like. You can try "-profile:v baseline" which restricts the H.264 features to a smaller set.
Christian

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Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this
-vf pad concat, textfile etc. is about. Do you have images of different size? Are your frames not named in a logical way? I assume you generate
them from Tcl, what I would do is make a directory, put the frames in
with ascending numbers and then use the img input using the format
pattern as in my post. I tested it with a sequence of 20 images and can
play it in VLC without problems. You can find my file here: https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in
your VLC, then maybe you have a buggy version of it? It may also try to
use a hardware decoder, and perhaps there is still something in the
encoder settings that your hardware decoder does not like. You can try "-profile:v baseline" which restricts the H.264 features to a smaller set. Christian

FireFox can*t play it either.
Already tried different formats, including baseline, no change.
Somehow the name-%d.png trick never worked for me so I somehow diverted to the method with the text file. Besides, I want the vid to play 1 to 10 and then 10 to 1 (reverse order). I't more efficient to create a text file instead of copying the 10 file
twice with different names.

--- SoupGate-Win32 v1.05
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Alexandru schrieb am Freitag, 12. August 2022 um 00:34:59 UTC+3:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this
-vf pad concat, textfile etc. is about. Do you have images of different size? Are your frames not named in a logical way? I assume you generate them from Tcl, what I would do is make a directory, put the frames in
with ascending numbers and then use the img input using the format
pattern as in my post. I tested it with a sequence of 20 images and can play it in VLC without problems. You can find my file here: https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in
your VLC, then maybe you have a buggy version of it? It may also try to use a hardware decoder, and perhaps there is still something in the encoder settings that your hardware decoder does not like. You can try "-profile:v baseline" which restricts the H.264 features to a smaller set. Christian

FireFox can*t play it either.
Already tried different formats, including baseline, no change.
Somehow the name-%d.png trick never worked for me so I somehow diverted to the method with the text file. Besides, I want the vid to play 1 to 10 and then 10 to 1 (reverse order). I't more efficient to create a text file instead of copying the 10 file

twice with different names.

Wnated to specify:
When using -i name-%d.png (my files are numberd begnning at 1, 2, 3, ... 10) the vid only contain 2 frames (1st and 5th). Why, don't know...

--- SoupGate-Win32 v1.05
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Alexandru <alexandru.dadalau@meshparts.de> writes:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this
-vf pad concat, textfile etc. is about. Do you have images of different
size? Are your frames not named in a logical way? I assume you generate
them from Tcl, what I would do is make a directory, put the frames in
with ascending numbers and then use the img input using the format
pattern as in my post. I tested it with a sequence of 20 images and can
play it in VLC without problems. You can find my file here:
https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in
your VLC, then maybe you have a buggy version of it? It may also try to
use a hardware decoder, and perhaps there is still something in the
encoder settings that your hardware decoder does not like. You can try
"-profile:v baseline" which restricts the H.264 features to a smaller set. >> Christian

FireFox can*t play it either.

The URL Christian gave plays for me in firefox (debian "bullseye",
firefox 103.0.1). Your "FireFox can*t play it either" really meant that
URL? Platform and browser version would make your answer more helpful to
us to help you.

Or did you just repeat what you said earlier in the thread that the
videos generated by you didn't play in Firefox (which also seems to be a
must have beside playing in PowerPoint)?

Already tried different formats, including baseline, no change.
Somehow the name-%d.png trick never worked for me so I somehow
diverted to the method with the text file. Besides, I want the vid to
play 1 to 10 and then 10 to 1 (reverse order). I't more efficient to
create a text file instead of copying the 10 file twice with different
names.

At least on unix like platforms you could easily use links for
duplicated frames. Not to talk about that 10 video frames are almost no
storage space by (really almost) any means nowadays.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Am 11.08.22 um 23:47 schrieb Alexandru:

Alexandru schrieb am Freitag, 12. August 2022 um 00:34:59 UTC+3:

Somehow the name-%d.png trick never worked for me so I somehow diverted to the method with the text file. Besides, I want the vid to play 1 to 10 and then 10 to 1 (reverse order). I't more efficient to create a text file instead of copying the 10 file

twice with different names.

Wnated to specify:
When using -i name-%d.png (my files are numberd begnning at 1, 2, 3, ... 10) the vid only contain 2 frames (1st and 5th). Why, don't know...

I had a similar problem at the first try, and it was because of the
positioning of the frame rate flag "-r". If you put it after the input
file, then it will read the images as avideo stream of 25 FPS and then downsample to 5 FPS = keep only every 5th frame. The full line I used
for the video I upoaded was:

ffmpeg -r 5 -i frame_%03d.jpg -c:v libx264 -crf 17 -pix_fmt yuv420p out.mp4

Copy pasted verbatim. I had jpeg input instead of PNG, don't think this
makes a difference, though.

A few things to think about:
* Do you have odd sizes? Some players choke when the width / height are
not multiples of 8 or 16
* Do you have 16 bit PNGs? YOu can check at a Linux command line by
"identify file.png", if ImageMagick is installed.
* Maybe try another version of ffmpeg

My phone also plays the file created by me.

Christian

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Christian Gollwitzer schrieb am Freitag, 12. August 2022 um 08:44:48 UTC+3:

Am 12.08.22 um 07:27 schrieb Alexandru:

Rolf Ade schrieb am Freitag, 12. August 2022 um 01:55:42 UTC+3:

Alexandru <alexandr...@meshparts.de> writes:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this >>>> -vf pad concat, textfile etc. is about. Do you have images of different >>>> size? Are your frames not named in a logical way? I assume you generate >>>> them from Tcl, what I would do is make a directory, put the frames in >>>> with ascending numbers and then use the img input using the format
pattern as in my post. I tested it with a sequence of 20 images and can >>>> play it in VLC without problems. You can find my file here:
https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in >>>> your VLC, then maybe you have a buggy version of it? It may also try to >>>> use a hardware decoder, and perhaps there is still something in the
encoder settings that your hardware decoder does not like. You can try >>>> "-profile:v baseline" which restricts the H.264 features to a smaller set.
Christian

FireFox can*t play it either.

The URL Christian gave plays for me in firefox (debian "bullseye",
firefox 103.0.1). Your "FireFox can*t play it either" really meant that
URL? Platform and browser version would make your answer more helpful to >> us to help you.

Or did you just repeat what you said earlier in the thread that the
videos generated by you didn't play in Firefox (which also seems to be a >> must have beside playing in PowerPoint)?

Yes, my video does not play in FireFox. It's not a must have. But it's weird, which means that ffmpeg does something wrong with that video.

The question was, whether the video from me (https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4) does play in your
firefox. Because then it boils down to the difference between your
command line and mine. If it doesn't the difference is in your decoder
(which might be a hardware accelerated decoder which is more picky)

Christian

Your video plays in my FireFox.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Christian Gollwitzer schrieb am Freitag, 12. August 2022 um 07:54:10 UTC+3:

Am 11.08.22 um 23:47 schrieb Alexandru:

Alexandru schrieb am Freitag, 12. August 2022 um 00:34:59 UTC+3:

Somehow the name-%d.png trick never worked for me so I somehow diverted to the method with the text file. Besides, I want the vid to play 1 to 10 and then 10 to 1 (reverse order). I't more efficient to create a text file instead of copying the 10

file twice with different names.

Wnated to specify:
When using -i name-%d.png (my files are numberd begnning at 1, 2, 3, ... 10) the vid only contain 2 frames (1st and 5th). Why, don't know...

I had a similar problem at the first try, and it was because of the positioning of the frame rate flag "-r". If you put it after the input
file, then it will read the images as avideo stream of 25 FPS and then downsample to 5 FPS = keep only every 5th frame. The full line I used
for the video I upoaded was:

ffmpeg -r 5 -i frame_%03d.jpg -c:v libx264 -crf 17 -pix_fmt yuv420p out.mp4

Copy pasted verbatim. I had jpeg input instead of PNG, don't think this makes a difference, though.

A few things to think about:
* Do you have odd sizes? Some players choke when the width / height are
not multiples of 8 or 16
* Do you have 16 bit PNGs? YOu can check at a Linux command line by "identify file.png", if ImageMagick is installed.
* Maybe try another version of ffmpeg

My phone also plays the file created by me.

Christian

I need to add

-safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"

to your line so I have

exec ffmpeg -r 5 -i $3D_animation_rootname-%d.png -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

An yes, the size of the images is pretty anything, since the PNGs are generated from Tcl Widgets. That's why I need the above extra options for the witdth and height.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Am 12.08.22 um 07:27 schrieb Alexandru:

Rolf Ade schrieb am Freitag, 12. August 2022 um 01:55:42 UTC+3:

Alexandru <alexandr...@meshparts.de> writes:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this >>>> -vf pad concat, textfile etc. is about. Do you have images of different >>>> size? Are your frames not named in a logical way? I assume you generate >>>> them from Tcl, what I would do is make a directory, put the frames in
with ascending numbers and then use the img input using the format
pattern as in my post. I tested it with a sequence of 20 images and can >>>> play it in VLC without problems. You can find my file here:
https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in
your VLC, then maybe you have a buggy version of it? It may also try to >>>> use a hardware decoder, and perhaps there is still something in the
encoder settings that your hardware decoder does not like. You can try >>>> "-profile:v baseline" which restricts the H.264 features to a smaller set. >>>> Christian

FireFox can*t play it either.

The URL Christian gave plays for me in firefox (debian "bullseye",
firefox 103.0.1). Your "FireFox can*t play it either" really meant that
URL? Platform and browser version would make your answer more helpful to
us to help you.

Or did you just repeat what you said earlier in the thread that the
videos generated by you didn't play in Firefox (which also seems to be a
must have beside playing in PowerPoint)?

Yes, my video does not play in FireFox. It's not a must have. But it's weird, which means that ffmpeg does something wrong with that video.

The question was, whether the video from me (https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4) does play in your
firefox. Because then it boils down to the difference between your
command line and mine. If it doesn't the difference is in your decoder
(which might be a hardware accelerated decoder which is more picky)

Christian

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Rolf Ade schrieb am Freitag, 12. August 2022 um 01:55:42 UTC+3:

Alexandru <alexandr...@meshparts.de> writes:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this
-vf pad concat, textfile etc. is about. Do you have images of different
size? Are your frames not named in a logical way? I assume you generate
them from Tcl, what I would do is make a directory, put the frames in
with ascending numbers and then use the img input using the format
pattern as in my post. I tested it with a sequence of 20 images and can
play it in VLC without problems. You can find my file here:
https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in
your VLC, then maybe you have a buggy version of it? It may also try to
use a hardware decoder, and perhaps there is still something in the
encoder settings that your hardware decoder does not like. You can try
"-profile:v baseline" which restricts the H.264 features to a smaller set. >> Christian

FireFox can*t play it either.

The URL Christian gave plays for me in firefox (debian "bullseye",
firefox 103.0.1). Your "FireFox can*t play it either" really meant that
URL? Platform and browser version would make your answer more helpful to
us to help you.

Or did you just repeat what you said earlier in the thread that the
videos generated by you didn't play in Firefox (which also seems to be a
must have beside playing in PowerPoint)?

Yes, my video does not play in FireFox. It's not a must have. But it's weird, which means that ffmpeg does something wrong with that video.

Already tried different formats, including baseline, no change.
Somehow the name-%d.png trick never worked for me so I somehow
diverted to the method with the text file. Besides, I want the vid to
play 1 to 10 and then 10 to 1 (reverse order). I't more efficient to
create a text file instead of copying the 10 file twice with different names.

At least on unix like platforms you could easily use links for
duplicated frames. Not to talk about that 10 video frames are almost no storage space by (really almost) any means nowadays.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Christian Gollwitzer schrieb am Freitag, 12. August 2022 um 07:54:10 UTC+3:

Am 11.08.22 um 23:47 schrieb Alexandru:

Alexandru schrieb am Freitag, 12. August 2022 um 00:34:59 UTC+3:

Somehow the name-%d.png trick never worked for me so I somehow diverted to the method with the text file. Besides, I want the vid to play 1 to 10 and then 10 to 1 (reverse order). I't more efficient to create a text file instead of copying the 10

file twice with different names.

Wnated to specify:
When using -i name-%d.png (my files are numberd begnning at 1, 2, 3, ... 10) the vid only contain 2 frames (1st and 5th). Why, don't know...

I had a similar problem at the first try, and it was because of the positioning of the frame rate flag "-r". If you put it after the input
file, then it will read the images as avideo stream of 25 FPS and then downsample to 5 FPS = keep only every 5th frame. The full line I used
for the video I upoaded was:

ffmpeg -r 5 -i frame_%03d.jpg -c:v libx264 -crf 17 -pix_fmt yuv420p out.mp4

Copy pasted verbatim. I had jpeg input instead of PNG, don't think this makes a difference, though.

A few things to think about:
* Do you have odd sizes? Some players choke when the width / height are
not multiples of 8 or 16

Yes, see my previous post.

* Do you have 16 bit PNGs? YOu can check at a Linux command line by "identify file.png", if ImageMagick is installed.

I checked the image properties in IrfanView, it says:
Original colors 16,7 Million (32 BitsPerPixel)
Current colors 16,7 Million (24 BitsPerPixel)
So I gues, no, it's not 16 bin PNGs

* Maybe try another version of ffmpeg

Currently using Build: ffmpeg-20191004-e6625ca-win64-static
I'll see if there is a newer one.

My phone also plays the file created by me.

Christian

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Christian Gollwitzer schrieb am Freitag, 12. August 2022 um 07:54:10 UTC+3:

Am 11.08.22 um 23:47 schrieb Alexandru:

Alexandru schrieb am Freitag, 12. August 2022 um 00:34:59 UTC+3:

Somehow the name-%d.png trick never worked for me so I somehow diverted to the method with the text file. Besides, I want the vid to play 1 to 10 and then 10 to 1 (reverse order). I't more efficient to create a text file instead of copying the 10

file twice with different names.

Wnated to specify:
When using -i name-%d.png (my files are numberd begnning at 1, 2, 3, ... 10) the vid only contain 2 frames (1st and 5th). Why, don't know...

I had a similar problem at the first try, and it was because of the positioning of the frame rate flag "-r". If you put it after the input
file, then it will read the images as avideo stream of 25 FPS and then downsample to 5 FPS = keep only every 5th frame. The full line I used
for the video I upoaded was:

ffmpeg -r 5 -i frame_%03d.jpg -c:v libx264 -crf 17 -pix_fmt yuv420p out.mp4

Copy pasted verbatim. I had jpeg input instead of PNG, don't think this makes a difference, though.

A few things to think about:
* Do you have odd sizes? Some players choke when the width / height are
not multiples of 8 or 16
* Do you have 16 bit PNGs? YOu can check at a Linux command line by "identify file.png", if ImageMagick is installed.
* Maybe try another version of ffmpeg

My phone also plays the file created by me.

Christian

I just created another 10 PNGs as screen shots (FullHD size)
I have the same issues. So the size of PNGs is not the issue.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Christian Gollwitzer schrieb am Freitag, 12. August 2022 um 08:44:48 UTC+3:

Am 12.08.22 um 07:27 schrieb Alexandru:

Rolf Ade schrieb am Freitag, 12. August 2022 um 01:55:42 UTC+3:

Alexandru <alexandr...@meshparts.de> writes:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this >>>> -vf pad concat, textfile etc. is about. Do you have images of different >>>> size? Are your frames not named in a logical way? I assume you generate >>>> them from Tcl, what I would do is make a directory, put the frames in >>>> with ascending numbers and then use the img input using the format
pattern as in my post. I tested it with a sequence of 20 images and can >>>> play it in VLC without problems. You can find my file here:
https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in >>>> your VLC, then maybe you have a buggy version of it? It may also try to >>>> use a hardware decoder, and perhaps there is still something in the
encoder settings that your hardware decoder does not like. You can try >>>> "-profile:v baseline" which restricts the H.264 features to a smaller set.
Christian

FireFox can*t play it either.

The URL Christian gave plays for me in firefox (debian "bullseye",
firefox 103.0.1). Your "FireFox can*t play it either" really meant that
URL? Platform and browser version would make your answer more helpful to >> us to help you.

Or did you just repeat what you said earlier in the thread that the
videos generated by you didn't play in Firefox (which also seems to be a >> must have beside playing in PowerPoint)?

Yes, my video does not play in FireFox. It's not a must have. But it's weird, which means that ffmpeg does something wrong with that video.

The question was, whether the video from me (https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4) does play in your
firefox. Because then it boils down to the difference between your
command line and mine. If it doesn't the difference is in your decoder
(which might be a hardware accelerated decoder which is more picky)

Christian

Could you send me your PNGs then I will use exactly your command line with your PNGs.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Alexandru schrieb am Freitag, 12. August 2022 um 09:31:23 UTC+3:

Christian Gollwitzer schrieb am Freitag, 12. August 2022 um 08:44:48 UTC+3:

Am 12.08.22 um 07:27 schrieb Alexandru:

Rolf Ade schrieb am Freitag, 12. August 2022 um 01:55:42 UTC+3:

Alexandru <alexandr...@meshparts.de> writes:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this
-vf pad concat, textfile etc. is about. Do you have images of different
size? Are your frames not named in a logical way? I assume you generate
them from Tcl, what I would do is make a directory, put the frames in >>>> with ascending numbers and then use the img input using the format >>>> pattern as in my post. I tested it with a sequence of 20 images and can
play it in VLC without problems. You can find my file here:
https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in >>>> your VLC, then maybe you have a buggy version of it? It may also try to
use a hardware decoder, and perhaps there is still something in the >>>> encoder settings that your hardware decoder does not like. You can try
"-profile:v baseline" which restricts the H.264 features to a smaller set.
Christian

FireFox can*t play it either.

The URL Christian gave plays for me in firefox (debian "bullseye",
firefox 103.0.1). Your "FireFox can*t play it either" really meant that >> URL? Platform and browser version would make your answer more helpful to
us to help you.

Or did you just repeat what you said earlier in the thread that the
videos generated by you didn't play in Firefox (which also seems to be a
must have beside playing in PowerPoint)?

Yes, my video does not play in FireFox. It's not a must have. But it's weird, which means that ffmpeg does something wrong with that video.

The question was, whether the video from me (https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4) does play in your firefox. Because then it boils down to the difference between your
command line and mine. If it doesn't the difference is in your decoder (which might be a hardware accelerated decoder which is more picky)

Christian

Could you send me your PNGs then I will use exactly your command line with your PNGs.

I just realized, that PowerPoint also has it's problems with the my vid. It looks like it's playing the video correctly but there is something wrong with the frames. I cannot pause the video at the first frame, then the next frames are play 2 to 10 and
then the reversed order is played only 10 to 5. Very weird...

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Alexandru schrieb am Freitag, 12. August 2022 um 09:51:07 UTC+3:

Alexandru schrieb am Freitag, 12. August 2022 um 09:31:23 UTC+3:

Christian Gollwitzer schrieb am Freitag, 12. August 2022 um 08:44:48 UTC+3:

Am 12.08.22 um 07:27 schrieb Alexandru:

Rolf Ade schrieb am Freitag, 12. August 2022 um 01:55:42 UTC+3:

Alexandru <alexandr...@meshparts.de> writes:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this
-vf pad concat, textfile etc. is about. Do you have images of different
size? Are your frames not named in a logical way? I assume you generate
them from Tcl, what I would do is make a directory, put the frames in
with ascending numbers and then use the img input using the format >>>> pattern as in my post. I tested it with a sequence of 20 images and can
play it in VLC without problems. You can find my file here:
https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in
your VLC, then maybe you have a buggy version of it? It may also try to
use a hardware decoder, and perhaps there is still something in the >>>> encoder settings that your hardware decoder does not like. You can try
"-profile:v baseline" which restricts the H.264 features to a smaller set.
Christian

FireFox can*t play it either.

The URL Christian gave plays for me in firefox (debian "bullseye",
firefox 103.0.1). Your "FireFox can*t play it either" really meant that
URL? Platform and browser version would make your answer more helpful to
us to help you.

Or did you just repeat what you said earlier in the thread that the >> videos generated by you didn't play in Firefox (which also seems to be a
must have beside playing in PowerPoint)?

Yes, my video does not play in FireFox. It's not a must have. But it's weird, which means that ffmpeg does something wrong with that video.

The question was, whether the video from me (https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4) does play in your firefox. Because then it boils down to the difference between your command line and mine. If it doesn't the difference is in your decoder (which might be a hardware accelerated decoder which is more picky)

Christian

Could you send me your PNGs then I will use exactly your command line with your PNGs.

I just realized, that PowerPoint also has it's problems with the my vid. It looks like it's playing the video correctly but there is something wrong with the frames. I cannot pause the video at the first frame, then the next frames are play 2 to 10 and

then the reversed order is played only 10 to 5. Very weird...
Looking at the output of ffmpeg I see things that look like warnings/errors (but not marked as such):

DTS -230584300921369 < 0 out of order
DTS -230584300921369, next:40000 st:0 invalid dropping

After searching the internet I found something similar to my problem: https://www.reddit.com/r/ffmpeg/comments/ks8zfs/png_concat_dtspts_invalid/

The proposed solution is to add "duration" after each "file" in the list of PNGs.

Now PowerPoint still plays the video with the same issue that it skips the last frames.
FireFox now finaly plays the video and it does it correctly!
VLC still perfoms worst with the small addition, that now more than only first frame is played, but only in the video loop, every second loop run.

After a while: Resolution!
I removed the -r 5 option (frame rate) kept the "duration 0.2" option in the text file with PNG names and now it works!

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Alexandru schrieb am Freitag, 12. August 2022 um 11:56:50 UTC+3:

Alexandru schrieb am Freitag, 12. August 2022 um 09:51:07 UTC+3:

Alexandru schrieb am Freitag, 12. August 2022 um 09:31:23 UTC+3:

Christian Gollwitzer schrieb am Freitag, 12. August 2022 um 08:44:48 UTC+3:

Am 12.08.22 um 07:27 schrieb Alexandru:

Rolf Ade schrieb am Freitag, 12. August 2022 um 01:55:42 UTC+3:

Alexandru <alexandr...@meshparts.de> writes:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 23:42:22 UTC+3:

Am 11.08.22 um 22:07 schrieb Alexandru:

Christian Gollwitzer schrieb am Donnerstag, 11. August 2022 um 18:41:21 UTC+3:

After about 50 tries I got this command
exec ffmpeg -y -r 5 -hide_banner -f concat -i $txtfile -safe 0 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -crf 17 -pix_fmt yuv420p $3D_animation_rootname.mp4

which works for PowerPoint (I can insert the video into PowePoint and play it). The quality is now much better.
But: The VLC player does not play it anymore, which is very weird. VLC only shows the first frame and done!

That is strange indeed. But honestly I do not understand what all this
-vf pad concat, textfile etc. is about. Do you have images of different
size? Are your frames not named in a logical way? I assume you generate
them from Tcl, what I would do is make a directory, put the frames in
with ascending numbers and then use the img input using the format
pattern as in my post. I tested it with a sequence of 20 images and can
play it in VLC without problems. You can find my file here:
https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4

It also plays in Firefox without problems. If it also doesn't play in
your VLC, then maybe you have a buggy version of it? It may also try to
use a hardware decoder, and perhaps there is still something in the
encoder settings that your hardware decoder does not like. You can try
"-profile:v baseline" which restricts the H.264 features to a smaller set.
Christian

FireFox can*t play it either.

The URL Christian gave plays for me in firefox (debian "bullseye", >> firefox 103.0.1). Your "FireFox can*t play it either" really meant that
URL? Platform and browser version would make your answer more helpful to
us to help you.

Or did you just repeat what you said earlier in the thread that the >> videos generated by you didn't play in Firefox (which also seems to be a
must have beside playing in PowerPoint)?

Yes, my video does not play in FireFox. It's not a must have. But it's weird, which means that ffmpeg does something wrong with that video.

The question was, whether the video from me (https://www.auriocus.de/Grumpf/demo_ffmpeg.mp4) does play in your firefox. Because then it boils down to the difference between your command line and mine. If it doesn't the difference is in your decoder (which might be a hardware accelerated decoder which is more picky)

Christian

Could you send me your PNGs then I will use exactly your command line with your PNGs.

I just realized, that PowerPoint also has it's problems with the my vid. It looks like it's playing the video correctly but there is something wrong with the frames. I cannot pause the video at the first frame, then the next frames are play 2 to 10

and then the reversed order is played only 10 to 5. Very weird...

Looking at the output of ffmpeg I see things that look like warnings/errors (but not marked as such):

DTS -230584300921369 < 0 out of order
DTS -230584300921369, next:40000 st:0 invalid dropping

After searching the internet I found something similar to my problem: https://www.reddit.com/r/ffmpeg/comments/ks8zfs/png_concat_dtspts_invalid/

The proposed solution is to add "duration" after each "file" in the list of PNGs.

Now PowerPoint still plays the video with the same issue that it skips the last frames.
FireFox now finaly plays the video and it does it correctly!
VLC still perfoms worst with the small addition, that now more than only first frame is played, but only in the video loop, every second loop run.

After a while: Resolution!
I removed the -r 5 option (frame rate) kept the "duration 0.2" option in the text file with PNG names and now it works!

I noticed, that "catch" arround the ffmpeg command retuns 1 so ffmpeg actually returns error, though the vid is created and it runs perfectly on PowerPoint, FireFox and VLC.

The output of ffmpeg also does not show any warnings or errors:

Input #0, concat, from 'C:/arbeit/MESHPARTS-Offline/Assemblies/Schulung/ProfileScrews/temp.avi.txt':
Duration: 00:00:04.00, start: 0.000000, bitrate: 1 kb/s
Stream #0:0: Video: png, rgb24(pc), 1920x1080, 25 tbr, 25 tbn, 25 tbc Stream mapping:
Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0000020e1fcdaa00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000020e1fcdaa00] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0000020e1fcdaa00] 264 - core 158 r2984 3759fcb - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_
range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=
1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=17.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'C:/arbeit/MESHPARTS-Offline/Assemblies/Schulung/ProfileScrews/s.mp4':
Metadata:
encoder : Lavf58.33.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080, q=-1--1, 25 fps, 12800 tbn, 25 tbc
Metadata:
encoder : Lavc58.59.101 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 31 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=24 drop=0 speed= 0x
frame= 51 fps= 47 q=22.0 size= 0kB time=-00:00:00.07 bitrate=N/A dup=40 drop=0 speed=N/A
frame= 66 fps= 39 q=22.0 size= 1024kB time=00:00:00.52 bitrate=16130.3kbits/s dup=52 drop=0 speed=0.309x
frame= 86 fps= 38 q=22.0 size= 1536kB time=00:00:01.32 bitrate=9532.2kbits/s dup=68 drop=0 speed=0.586x
frame= 99 fps= 27 q=-1.0 Lsize= 3460kB time=00:00:03.84 bitrate=7381.6kbits/s dup=79 drop=0 speed=1.04x
video:3458kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.058427%
[libx264 @ 0000020e1fcdaa00] frame I:2 Avg QP:11.39 size:155517
[libx264 @ 0000020e1fcdaa00] frame P:25 Avg QP:18.40 size:126488
[libx264 @ 0000020e1fcdaa00] frame B:72 Avg QP:17.49 size: 934
[libx264 @ 0000020e1fcdaa00] consecutive B-frames: 3.0% 0.0% 0.0% 97.0% [libx264 @ 0000020e1fcdaa00] mb I I16..4: 53.3% 21.6% 25.2%
[libx264 @ 0000020e1fcdaa00] mb P I16..4: 3.7% 1.9% 8.8% P16..4: 3.8% 0.4% 0.5% 0.0% 0.0% skip:80.9%
[libx264 @ 0000020e1fcdaa00] mb B I16..4: 0.1% 0.1% 0.0% B16..8: 4.5% 0.0% 0.0% direct: 0.1% skip:95.3% L0:42.8% L1:57.1% BI: 0.1%
[libx264 @ 0000020e1fcdaa00] 8x8 transform intra:16.8% inter:14.7%
[libx264 @ 0000020e1fcdaa00] coded y,uvDC,uvAC intra: 47.1% 45.4% 44.5% inter: 0.9% 0.6% 0.6%
[libx264 @ 0000020e1fcdaa00] i16 v,h,dc,p: 69% 22% 9% 0%
[libx264 @ 0000020e1fcdaa00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 46% 5% 41% 1% 3% 1% 1% 1% 1%
[libx264 @ 0000020e1fcdaa00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 16% 25% 4% 9% 6% 13% 4% 6%
[libx264 @ 0000020e1fcdaa00] i8c dc,h,v,p: 81% 8% 6% 5%
[libx264 @ 0000020e1fcdaa00] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0000020e1fcdaa00] ref P L0: 59.1% 15.9% 21.3% 3.8%
[libx264 @ 0000020e1fcdaa00] ref B L0: 81.5% 17.4% 1.1%
[libx264 @ 0000020e1fcdaa00] ref B L1: 96.4% 3.6%
[libx264 @ 0000020e1fcdaa00] kb/s:7152.47

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On 12/08/2022 11:41, Alexandru wrote:

I noticed, that "catch" arround the ffmpeg command retuns 1 so ffmpeg actually returns error, though the vid is created and it runs perfectly on PowerPoint, FireFox and VLC.

That's probably because ffmpeg generates some output on stderr. You can
check by looking at $errorCode. If ffmpeg realy fails that will indicate CHILDSTATUS ... To ignore stderr, use exec -ignorestderr ffmpeg ...


Schelte

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Schelte schrieb am Freitag, 12. August 2022 um 14:54:40 UTC+3:

On 12/08/2022 11:41, Alexandru wrote:

I noticed, that "catch" arround the ffmpeg command retuns 1 so ffmpeg actually returns error, though the vid is created and it runs perfectly on PowerPoint, FireFox and VLC.

That's probably because ffmpeg generates some output on stderr. You can
check by looking at $errorCode. If ffmpeg realy fails that will indicate CHILDSTATUS ... To ignore stderr, use exec -ignorestderr ffmpeg ...

Schelte

Thanks Schelte for the tip. Adding -ignorestderr solved the problem. I wasn't aware of the option.

Regards
Alexandru

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Alexandru <alexandru.dadalau@meshparts.de> wrote:

Schelte schrieb am Freitag, 12. August 2022 um 14:54:40 UTC+3:

On 12/08/2022 11:41, Alexandru wrote:

I noticed, that "catch" arround the ffmpeg command retuns 1 so
ffmpeg actually returns error, though the vid is created and it
runs perfectly on PowerPoint, FireFox and VLC.

That's probably because ffmpeg generates some output on stderr. You
can check by looking at $errorCode. If ffmpeg realy fails that will
indicate CHILDSTATUS ... To ignore stderr, use exec -ignorestderr
ffmpeg ...

Thanks Schelte for the tip. Adding -ignorestderr solved the problem.
I wasn't aware of the option.

It is a 'newer' option to exec (I don't know when it appeared). Prior
to it showing up one had to have enough non-windows knowledge to
recognize the "2>" redirect as the way to "ignore stderr".

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