WEBM video looks correct in browsers, but not in video players
Ive been trying to figure out why a webm video renders incorrectly on my desktop...
The correct file can be seen here, however, downloading the file, and trying to play it in VLC/MPC-HC produces a bad video as seen here
(File is tested bad in VLC and MPC-HC, but renders perfectly in chrome and FF)
I've been able to extract the alpha channel with ffmpeg and it looks correct
Is this a poor implementation from the video players? (Other webm files play fine)
Is there a command i can throw into ffmpeg (or similar) to get the webm to look ok?
ffmpeg webm
asked Dec 12 '18 at 16:42
stelar7
1032
add a comment |
Ive been trying to figure out why a webm video renders incorrectly on my desktop...
The correct file can be seen here, however, downloading the file, and trying to play it in VLC/MPC-HC produces a bad video as seen here
(File is tested bad in VLC and MPC-HC, but renders perfectly in chrome and FF)
I've been able to extract the alpha channel with ffmpeg and it looks correct
Is this a poor implementation from the video players? (Other webm files play fine)
Is there a command i can throw into ffmpeg (or similar) to get the webm to look ok?
ffmpeg webm
asked Dec 12 '18 at 16:42
stelar7
1032
add a comment |
Ive been trying to figure out why a webm video renders incorrectly on my desktop...
The correct file can be seen here, however, downloading the file, and trying to play it in VLC/MPC-HC produces a bad video as seen here
(File is tested bad in VLC and MPC-HC, but renders perfectly in chrome and FF)
I've been able to extract the alpha channel with ffmpeg and it looks correct
Is this a poor implementation from the video players? (Other webm files play fine)
Is there a command i can throw into ffmpeg (or similar) to get the webm to look ok?
ffmpeg webm
asked Dec 12 '18 at 16:42
stelar7
1032
Ive been trying to figure out why a webm video renders incorrectly on my desktop...
The correct file can be seen here, however, downloading the file, and trying to play it in VLC/MPC-HC produces a bad video as seen here
(File is tested bad in VLC and MPC-HC, but renders perfectly in chrome and FF)
I've been able to extract the alpha channel with ffmpeg and it looks correct
Is this a poor implementation from the video players? (Other webm files play fine)
Is there a command i can throw into ffmpeg (or similar) to get the webm to look ok?
ffmpeg webm
ffmpeg webm
asked Dec 12 '18 at 16:42
stelar7
1032
asked Dec 12 '18 at 16:42
stelar7
1032
asked Dec 12 '18 at 16:42
stelar7
1032
asked Dec 12 '18 at 16:42
stelar7
1032
asked Dec 12 '18 at 16:42
stelar7
1032
1032
add a comment |
add a comment |
1 Answer
1
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votes
What the regular video players are showing is just the luma+color planes. You need a premultiplied result for the output you want. Which is what the browsers are doing, in effect. See https://stackoverflow.com/a/43017337/5726027
ffmpeg -c:v libvpx -i base.webm -vf premultiply=inplace=1 out.mp4
answered Dec 12 '18 at 17:06
Gyan
14.5k21745
Perfect! but for various reasons i need the output to be a webm file. and if i replace .mp4 with .webm it gets grainy.. Is there a solution for this?
– stelar7
Dec 12 '18 at 17:45
Add-b:v 0 -crf 20
– Gyan
Dec 12 '18 at 17:47
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
What the regular video players are showing is just the luma+color planes. You need a premultiplied result for the output you want. Which is what the browsers are doing, in effect. See https://stackoverflow.com/a/43017337/5726027
ffmpeg -c:v libvpx -i base.webm -vf premultiply=inplace=1 out.mp4
answered Dec 12 '18 at 17:06
Gyan
14.5k21745
Perfect! but for various reasons i need the output to be a webm file. and if i replace .mp4 with .webm it gets grainy.. Is there a solution for this?
– stelar7
Dec 12 '18 at 17:45
Add-b:v 0 -crf 20
– Gyan
Dec 12 '18 at 17:47
add a comment |
What the regular video players are showing is just the luma+color planes. You need a premultiplied result for the output you want. Which is what the browsers are doing, in effect. See https://stackoverflow.com/a/43017337/5726027
ffmpeg -c:v libvpx -i base.webm -vf premultiply=inplace=1 out.mp4
answered Dec 12 '18 at 17:06
Gyan
14.5k21745
Perfect! but for various reasons i need the output to be a webm file. and if i replace .mp4 with .webm it gets grainy.. Is there a solution for this?
– stelar7
Dec 12 '18 at 17:45
Add-b:v 0 -crf 20
– Gyan
Dec 12 '18 at 17:47
add a comment |
What the regular video players are showing is just the luma+color planes. You need a premultiplied result for the output you want. Which is what the browsers are doing, in effect. See https://stackoverflow.com/a/43017337/5726027
ffmpeg -c:v libvpx -i base.webm -vf premultiply=inplace=1 out.mp4
answered Dec 12 '18 at 17:06
Gyan
14.5k21745
What the regular video players are showing is just the luma+color planes. You need a premultiplied result for the output you want. Which is what the browsers are doing, in effect. See https://stackoverflow.com/a/43017337/5726027
ffmpeg -c:v libvpx -i base.webm -vf premultiply=inplace=1 out.mp4
answered Dec 12 '18 at 17:06
Gyan
14.5k21745
answered Dec 12 '18 at 17:06
Gyan
14.5k21745
answered Dec 12 '18 at 17:06
Gyan
14.5k21745
answered Dec 12 '18 at 17:06
Gyan
14.5k21745
14.5k21745
Perfect! but for various reasons i need the output to be a webm file. and if i replace .mp4 with .webm it gets grainy.. Is there a solution for this?
– stelar7
Dec 12 '18 at 17:45
Add-b:v 0 -crf 20
– Gyan
Dec 12 '18 at 17:47
add a comment |
Perfect! but for various reasons i need the output to be a webm file. and if i replace .mp4 with .webm it gets grainy.. Is there a solution for this?
– stelar7
Dec 12 '18 at 17:45
Add-b:v 0 -crf 20
– Gyan
Dec 12 '18 at 17:47
Perfect! but for various reasons i need the output to be a webm file. and if i replace .mp4 with .webm it gets grainy.. Is there a solution for this?
– stelar7
Dec 12 '18 at 17:45
Perfect! but for various reasons i need the output to be a webm file. and if i replace .mp4 with .webm it gets grainy.. Is there a solution for this?
– stelar7
Dec 12 '18 at 17:45
Add
-b:v 0 -crf 20– Gyan
Dec 12 '18 at 17:47
Add
-b:v 0 -crf 20– Gyan
Dec 12 '18 at 17:47
add a comment |
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