[Libav-user] video bitrate control far from accuracy
Carl Eugen Hoyos
cehoyos at ag.or.at
Thu Jul 17 11:31:23 CEST 2014
谭艳梅 <tanyanmei at ...> writes:
> I'm transcoding with ffmpeg API . but the video frame
> rate of the target file is far from accuracy .
(The frame rate or the bit rate?)
Is this reproducible with ffmpeg (the application)?
To test if it is at all possible to reach a given bitrate
for a given input file, you can use a high constant
quantizer to test:
$ ffmpeg -i input -qscale 31 -vcodec h263 out.avi
I don't think 22k for qcif and h263 is realistic.
If you really meant frame rate than you can choose it
freely assuming the container allows it.
More information about the Libav-user