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| author | Zhong Li <zhong.li@intel.com> | 2019-01-23 19:16:17 +0800 |
|---|---|---|
| committer | Zhong Li <zhong.li@intel.com> | 2019-01-25 16:53:27 +0800 |
| commit | 74cf2dc3ac405c5e55b7ecd4d17b40e26d59eb84 (patch) | |
| tree | 44dd369aad5ac5034a18fef803ae2b4acfd10da4 /libavcodec/mips/videodsp_init.c | |
| parent | 3224d6691cdc59ef0d31cdb35efac27494ff515b (diff) | |
| download | ffmpeg-74cf2dc3ac405c5e55b7ecd4d17b40e26d59eb84.tar.gz | |
lavc/qsvenc: enable QVBR mode
QVBR mode is to use the variable bitrate control algorithm
with constant quality.
mfxExtCodingOption3 should be supported to enable QVBR mode.
It is neccesary to specify a max_rate for QVBR, else it may be ICQ mode.
Example usage: ffmpeg -hwaccel qsv -c:v h264_qsv -i input.mp4 -c:v
h264_qsv -global_quality 25 -maxrate 2M test_qvbr.mp4 -v verbose
Clip QVBR quality range to be [0, 51] as Mark's commments.
It is similar to qp range of CQP but possibly should be updated when VP8/VP9
encoding can be supported.
Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: Zhong Li <zhong.li@intel.com>
Diffstat (limited to 'libavcodec/mips/videodsp_init.c')
0 files changed, 0 insertions, 0 deletions