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Old 10-30-2014, 12:17 PM   #1
Livestream
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How do I convert 1080p/720p video to 480p using ffmpeg?


I would like to know how to convert 1080p/720p video to 480p using ffmpeg with minimal quality loss(assuming lossless conversion is impossible).
 
Old 10-30-2014, 01:43 PM   #2
c0d3d
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This should do the trick:
Code:
ffmpeg -i /path/to/input -s WxH /path/to/output
 
Old 10-30-2014, 02:50 PM   #3
metaschima
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Provide the output of
Code:
ffmpeg -i input.mkv
as well as specific codecs you want to use, and I'll recommend some commands. In general it's something like:

Code:
ffmpeg -i input.mkv -vcodec libx264 -vpre medium -crf 15 -s 640x272 -aspect 640:272 -r 23.976 -threads 4 -acodec libvo_aacenc -ab 128k -ar 48000 -async 48000 -ac 2 -scodec copy output.mkv
https://trac.ffmpeg.org/wiki/Encode/H.264
 
1 members found this post helpful.
Old 10-31-2014, 07:15 AM   #4
Livestream
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Quote:
Originally Posted by metaschima View Post
Provide the output of
Code:
ffmpeg -i input.mkv
as well as specific codecs you want to use, and I'll recommend some commands. In general it's something like:

Code:
ffmpeg -i input.mkv -vcodec libx264 -vpre medium -crf 15 -s 640x272 -aspect 640:272 -r 23.976 -threads 4 -acodec libvo_aacenc -ab 128k -ar 48000 -async 48000 -ac 2 -scodec copy output.mkv
https://trac.ffmpeg.org/wiki/Encode/H.264
Thank you for providing me with that link. I think I will find what I need there.
 
  


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