Comments on: FFmpeg Quality Comparison

By: Kebvin

Kebvin — Tue, 16 Dec 2008 06:18:13 +0000

Thanks for this! Saved me a bunch of time doing it all on my own. I still want to investigate the effects of changing the picture size when using qscale to try and get the best quality when encoding dvd resolution videos. Will post here if I get around to it!

By: Jay

Jay — Thu, 22 May 2008 00:53:23 +0000

I ought to have done this for myself a long time ago anyway. Of course it depends on the file you’re encoding, but this tends to work:

ffmpeg.exe -y -i input.avi -f flv -qscale 5 -r 25 -ar 44100 -ab 96 -s 500×374 output.flv

Full FFmpeg documentation can be found here.

By: Julius

Julius — Sun, 13 Jan 2008 15:38:18 +0000

Thanks for taking the time to do this, I was looking for exactly and just this information. Could you post the commandline in total that you’d be using for a -qscale 5 or 9 encode?

I’m also looking into doing VBR audio for flv with something like:
-acodec libmp3lame -aq 8 -ar 44100 -ac 2
Lame is actually doing much better at this variable rate (~99kbit/s) than any aac suitable for FLV1, even the nero one.