[SOLVED] How do I convert 1080p/720p video to 480p using ffmpeg?

Livestream · 10-30-2014, 11:17 AM

I would like to know how to convert 1080p/720p video to 480p using ffmpeg with minimal quality loss(assuming lossless conversion is impossible).

c0d3d · 10-30-2014, 12:43 PM

This should do the trick:

Code:

ffmpeg -i /path/to/input -s WxH /path/to/output

metaschima · 10-30-2014, 01:50 PM

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

Livestream · 10-31-2014, 06:15 AM

Quote:

Originally Posted by metaschima

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.