Variable framerate lossless video from yuv422 images
I've been pulling my hair lately with FFmpeg commandline. Be aware that I am not an FFmpeg expert. Here is my problem:
I have a bunch of YUV422 images as such:
image0.yuv
image1.yuv
..
image450.yuv
Along with these I have a file containing timestamps for every image, say:
timestamps.txt
I would like to encode a lossless video (maybe with -c:v libx264 -pix_fmt yuv422p) from these with every image displayed at its correct timstamp. Here are the things I tried in vain:
use
-f concatand provide a file containing a list like this:
file 'image0.yuv'
duration '0.0515'
file 'image0.yuv'
duration '0.0721'
... etc
this solution does not work because I need to provide a frame size (which is not included in the raw yuv files)
something like
cat *.yuv | ffmpeg -f rawvideo -s 800x600 -pix_fmt yuv422p -framerate 0.5 -i - -c:v libx264 -pix_fmt yuv422p out.mp4which doesn't work neither because I can't provide it timestamps for each image (variable framerate) but just use the fixed-framerateargumentI'm aware of the
-vsync vfrargument but can't manage to make it work properly
I would be eternally grateful for any piece of advice, thanks :)
command-line video ffmpeg framerate lossless
asked Jan 14 at 15:38
Robin BeilvertRobin Beilvert
31
add a comment |
I've been pulling my hair lately with FFmpeg commandline. Be aware that I am not an FFmpeg expert. Here is my problem:
I have a bunch of YUV422 images as such:
image0.yuv
image1.yuv
..
image450.yuv
Along with these I have a file containing timestamps for every image, say:
timestamps.txt
I would like to encode a lossless video (maybe with -c:v libx264 -pix_fmt yuv422p) from these with every image displayed at its correct timstamp. Here are the things I tried in vain:
use
-f concatand provide a file containing a list like this:
file 'image0.yuv'
duration '0.0515'
file 'image0.yuv'
duration '0.0721'
... etc
this solution does not work because I need to provide a frame size (which is not included in the raw yuv files)
something like
cat *.yuv | ffmpeg -f rawvideo -s 800x600 -pix_fmt yuv422p -framerate 0.5 -i - -c:v libx264 -pix_fmt yuv422p out.mp4which doesn't work neither because I can't provide it timestamps for each image (variable framerate) but just use the fixed-framerateargumentI'm aware of the
-vsync vfrargument but can't manage to make it work properly
I would be eternally grateful for any piece of advice, thanks :)
command-line video ffmpeg framerate lossless
asked Jan 14 at 15:38
Robin BeilvertRobin Beilvert
31
See video.stackexchange.com/a/19726
– Gyan
Jan 14 at 15:51
add a comment |
I've been pulling my hair lately with FFmpeg commandline. Be aware that I am not an FFmpeg expert. Here is my problem:
I have a bunch of YUV422 images as such:
image0.yuv
image1.yuv
..
image450.yuv
Along with these I have a file containing timestamps for every image, say:
timestamps.txt
I would like to encode a lossless video (maybe with -c:v libx264 -pix_fmt yuv422p) from these with every image displayed at its correct timstamp. Here are the things I tried in vain:
use
-f concatand provide a file containing a list like this:
file 'image0.yuv'
duration '0.0515'
file 'image0.yuv'
duration '0.0721'
... etc
this solution does not work because I need to provide a frame size (which is not included in the raw yuv files)
something like
cat *.yuv | ffmpeg -f rawvideo -s 800x600 -pix_fmt yuv422p -framerate 0.5 -i - -c:v libx264 -pix_fmt yuv422p out.mp4which doesn't work neither because I can't provide it timestamps for each image (variable framerate) but just use the fixed-framerateargumentI'm aware of the
-vsync vfrargument but can't manage to make it work properly
I would be eternally grateful for any piece of advice, thanks :)
command-line video ffmpeg framerate lossless
asked Jan 14 at 15:38
Robin BeilvertRobin Beilvert
31
I've been pulling my hair lately with FFmpeg commandline. Be aware that I am not an FFmpeg expert. Here is my problem:
I have a bunch of YUV422 images as such:
image0.yuv
image1.yuv
..
image450.yuv
Along with these I have a file containing timestamps for every image, say:
timestamps.txt
I would like to encode a lossless video (maybe with -c:v libx264 -pix_fmt yuv422p) from these with every image displayed at its correct timstamp. Here are the things I tried in vain:
use
-f concatand provide a file containing a list like this:
file 'image0.yuv'
duration '0.0515'
file 'image0.yuv'
duration '0.0721'
... etc
this solution does not work because I need to provide a frame size (which is not included in the raw yuv files)
something like
cat *.yuv | ffmpeg -f rawvideo -s 800x600 -pix_fmt yuv422p -framerate 0.5 -i - -c:v libx264 -pix_fmt yuv422p out.mp4which doesn't work neither because I can't provide it timestamps for each image (variable framerate) but just use the fixed-framerateargumentI'm aware of the
-vsync vfrargument but can't manage to make it work properly
I would be eternally grateful for any piece of advice, thanks :)
command-line video ffmpeg framerate lossless
command-line video ffmpeg framerate lossless
asked Jan 14 at 15:38
Robin BeilvertRobin Beilvert
31
asked Jan 14 at 15:38
Robin BeilvertRobin Beilvert
31
asked Jan 14 at 15:38
Robin BeilvertRobin Beilvert
31
asked Jan 14 at 15:38
Robin BeilvertRobin Beilvert
31
asked Jan 14 at 15:38
Robin BeilvertRobin Beilvert
31
31
See video.stackexchange.com/a/19726
– Gyan
Jan 14 at 15:51
add a comment |
See video.stackexchange.com/a/19726
– Gyan
Jan 14 at 15:51
See video.stackexchange.com/a/19726
– Gyan
Jan 14 at 15:51
See video.stackexchange.com/a/19726
– Gyan
Jan 14 at 15:51
add a comment |
1 Answer
1
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oldest
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It's not possible to specify common input options for the concat demuxer. Quick and dirty workaround: convert all YUV images to something that can be read without having to specify further options. For example:
for f in *.yuv; do ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i "$f" "${f%%.yuv}.avi"; done
Then, construct your concat file with the AVI files instead.
Or, with GNU parallel:
parallel 'ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i {} {.}.avi' ::: *.yuv
Or use the method linked to in the comments wherein you can pipe the YUV images and later modify the CFR timestamps of the generated file to become VFR.
answered Jan 14 at 15:52
slhckslhck
161k47447470
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
It's not possible to specify common input options for the concat demuxer. Quick and dirty workaround: convert all YUV images to something that can be read without having to specify further options. For example:
for f in *.yuv; do ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i "$f" "${f%%.yuv}.avi"; done
Then, construct your concat file with the AVI files instead.
Or, with GNU parallel:
parallel 'ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i {} {.}.avi' ::: *.yuv
Or use the method linked to in the comments wherein you can pipe the YUV images and later modify the CFR timestamps of the generated file to become VFR.
answered Jan 14 at 15:52
slhckslhck
161k47447470
add a comment |
It's not possible to specify common input options for the concat demuxer. Quick and dirty workaround: convert all YUV images to something that can be read without having to specify further options. For example:
for f in *.yuv; do ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i "$f" "${f%%.yuv}.avi"; done
Then, construct your concat file with the AVI files instead.
Or, with GNU parallel:
parallel 'ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i {} {.}.avi' ::: *.yuv
Or use the method linked to in the comments wherein you can pipe the YUV images and later modify the CFR timestamps of the generated file to become VFR.
answered Jan 14 at 15:52
slhckslhck
161k47447470
add a comment |
It's not possible to specify common input options for the concat demuxer. Quick and dirty workaround: convert all YUV images to something that can be read without having to specify further options. For example:
for f in *.yuv; do ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i "$f" "${f%%.yuv}.avi"; done
Then, construct your concat file with the AVI files instead.
Or, with GNU parallel:
parallel 'ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i {} {.}.avi' ::: *.yuv
Or use the method linked to in the comments wherein you can pipe the YUV images and later modify the CFR timestamps of the generated file to become VFR.
answered Jan 14 at 15:52
slhckslhck
161k47447470
It's not possible to specify common input options for the concat demuxer. Quick and dirty workaround: convert all YUV images to something that can be read without having to specify further options. For example:
for f in *.yuv; do ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i "$f" "${f%%.yuv}.avi"; done
Then, construct your concat file with the AVI files instead.
Or, with GNU parallel:
parallel 'ffmpeg -f rawvideo -s 320x240 -pix_fmt yuv422p -i {} {.}.avi' ::: *.yuv
Or use the method linked to in the comments wherein you can pipe the YUV images and later modify the CFR timestamps of the generated file to become VFR.
answered Jan 14 at 15:52
slhckslhck
161k47447470
answered Jan 14 at 15:52
slhckslhck
161k47447470
answered Jan 14 at 15:52
slhckslhck
161k47447470
answered Jan 14 at 15:52
slhckslhck
161k47447470
161k47447470
add a comment |
add a comment |
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See video.stackexchange.com/a/19726
– Gyan
Jan 14 at 15:51