Re: h.264 tips?

On Sat, 20 Feb 2010 19:27:03 JST
[email protected] (Andrew Church) wrote:


> * Otherwise, use CRF mode.  The value N in the "crf=N" parameter seems
>   to correspond roughly to the average quantization level (QP); in my
>   tests, I generally got a QP of crf-1.5 in I-frames and crf+1.5 in
>   P-frames, with B-frames somewhat higher.  There are probably better
>   references elsewhere on the web, but my rough (and again totally
>   unscientific) feeling is:
>      - crf=20: high quality (if you're familiar with videotapes, think
>                   "SP mode")
>      - crf=25: good quality ("LP mode")
>      - crf=30: fair quality, low bitrate ("EP mode")

	Thanks, but could you provide the correct syntax to export to
h264 (-y ffmpeg -F h264)? No matter what option I use, it will always
complain ffmpeg uses broken settings for x264.

	What options and settings exactly do you use? Thank you!

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