[FFmpeg-user] Best lossless
lou at lrcd.com
Thu Feb 2 09:31:40 CET 2012
On Wed, 01 Feb 2012 22:19:06 -0700
Deron <deron at pagestream.org> wrote:
> On 1/31/12 1:58 AM, dE . wrote:
> > On 01/30/12 21:20, Deron wrote:
> >> What is the best lossless encoding method ffmpeg supports for
> >> 720p/59.94fps? By best, I mean fewest problems playing and highest
> >> compression ratio. (I know, that is still hard to measure). Someone
> >> mentioned jpeg2000 to me (lossless mode of course), but I see little
> >> mention of it anywhere (not just within ffmpeg).
> >> Thanks,
> >> Deron
> > x264. It's virtually the best in everyway -- it's the fastest, it also
> > has a lossless mode; but not sure about reliability of playback.
> Thanks for the suggestion!
> I noticed that the presets (fast/max etc) are no longer in the preset
> contrary to advice from others. Does anyone know the command line for
> best compression using x264 lossless, or where the presets might have gone?
The presets are still available, but via libx264 and not through text
files that roughly emulated the presets.
ffmpeg -i input -c:v libx264 -preset veryslow -crf 0 output
ffmpeg -i input -c:v libx264 -preset veryslow -qp 0 output
It doesn't matter if you use crf or qp unless you are using 10-bit
x264. I'm not sure if the crf value for 10-bit x264 would be different
to achieve lossless, but I assume -qp 0 should give you lossless
regardless of 8-bit vs 10-bit.
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