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| author | Zhong Li <zhong.li@intel.com> | 2019-01-11 15:09:07 +0800 |
|---|---|---|
| committer | Zhong Li <zhong.li@intel.com> | 2019-04-03 23:00:15 +0800 |
| commit | 1125277bc64ebef1a7a6bee7349c7a8fab7fdcc7 (patch) | |
| tree | 6be91d4d5a8e21b972b1ad3d5d73042ea3d3cffc /libswresample/audioconvert.c | |
| parent | c745bedd18afea19e3eb75da3d094d542b02a88b (diff) | |
| download | ffmpeg-1125277bc64ebef1a7a6bee7349c7a8fab7fdcc7.tar.gz | |
lavc/qsvenc: enable hevc gpb option
GPB is the default type, just contains forward references but the
slice_type is B slice with higher encoding efficiency than regular P
slice, but lower performance.
Add an option to allow user to set regular P slice.
Fix ticket#6870
Test data on Intel Kabylake (i7-7567U CPU @ 3.50GHz):
1. ffmpeg -hwaccel qsv -c:v h264_qsv -i bbb_sunflower_1080p_30fps_normal.mp4 -vsync passthrough
-vframes 1000 -c:v hevc_qsv -gpb 0 -bf 0 -q 25 test_gpb_off_bf0_kbl.mp4
transcoding fps: 85
encoded file size of test_gpb_off_bf0_kbl.mp4: 21960100 (bytes)
2. ffmpeg -hwaccel qsv -c:v h264_qsv -i bbb_sunflower_1080p_30fps_normal.mp4 -vsync passthrough
-vframes 1000 -c:v hevc_qsv -gpb 1 -bf 0 -q 25 test_gpb_on_bf0_kbl.mp4
transcoding fps: 79
encoded file size oftest_gpb_on_bf0_kbl.mp4: 21211449 (bytes)
In this case, enable gpb can bring about 7% performance drop but 3.4% encoding efficiency improvment.
Signed-off-by: Zhong Li <zhong.li@intel.com>
Diffstat (limited to 'libswresample/audioconvert.c')
0 files changed, 0 insertions, 0 deletions