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| author | zhilizhao <zhilizhao@tencent.com> | 2021-04-27 13:09:56 +0800 |
|---|---|---|
| committer | Steven Liu <lq@chinaffmpeg.org> | 2021-06-10 19:54:03 +0800 |
| commit | cf1746d77989c2742c8c364f57a626942cccd8d1 (patch) | |
| tree | 1a36bc79e148425168256a57092fbf682a64651e /doc/optimization.txt | |
| parent | 08d933bf6169a93631fd76354214f837c973c18f (diff) | |
| download | ffmpeg-cf1746d77989c2742c8c364f57a626942cccd8d1.tar.gz | |
ffmpeg_videotoolbox: skip memory copy if hwaccel_output_format match
Simple test results:
Command:
./ffmpeg -y -hwaccel videotoolbox -hwaccel_output_format videotoolbox_vld \
-i test.mp4 -an -c:v h264_videotoolbox -benchmark out.mp4
Before:
frame= 1221 fps= 66 q=-0.0 Lsize= 3144kB time=00:00:20.33 bitrate=1266.6kbits/s dup=4 drop=0 speed= 1.1x
bench: utime=2.714s stime=1.218s rtime=18.574s
After:
frame= 1221 fps=137 q=-0.0 Lsize= 3144kB time=00:00:20.33 bitrate=1266.4kbits/s dup=4 drop=0 speed=2.28x
bench: utime=1.450s stime=1.440s rtime=8.924s
It has limited usecase since there is no video filter support, so
a log message is added to notify the user.
Reviewed-by: Steven Liu <liuqi05@kuaishou.com>
Diffstat (limited to 'doc/optimization.txt')
0 files changed, 0 insertions, 0 deletions