On Tue, Jan 15, 2019 at 05:23:24PM -0500, Shaofei Wang wrote: > With new option "-abr_pipeline" > It enabled multiple filter graph concurrency, which bring obove about > 4%~20% improvement in some 1:N scenarios by CPU or GPU acceleration > > Below are some test cases and comparison as reference. > (Hardware platform: Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz) > (Software: Intel iHD driver - 16.9.00100, CentOS 7) > > For 1:N transcode by GPU acceleration with vaapi: > ./ffmpeg -vaapi_device /dev/dri/renderD128 -hwaccel vaapi \ > -hwaccel_output_format vaapi \ > -i ~/Videos/1920x1080p_30.00_x264_qp28.h264 \ > -vf "scale_vaapi=1280:720" -c:v h264_vaapi -f null /dev/null \ > -vf "scale_vaapi=720:480" -c:v h264_vaapi -f null /dev/null \ > -abr_pipeline > > test results: > 2 encoders 5 encoders 10 encoders > Improved 6.1% 6.9% 5.5% > > For 1:N transcode by GPU acceleration with QSV: > ./ffmpeg -hwaccel qsv -c:v h264_qsv \ > -i ~/Videos/1920x1080p_30.00_x264_qp28.h264 \ > -vf "scale_qsv=1280:720:format=nv12" -c:v h264_qsv -f null /dev/null \ > -vf "scale_qsv=720:480:format=nv12" -c:v h264_qsv -f null /dev/null > > test results: > 2 encoders 5 encoders 10 encoders > Improved 6% 4% 15% > > For Intel GPU acceleration case, 1 decode to N scaling, by QSV: > ./ffmpeg -hwaccel qsv -c:v h264_qsv \ > -i ~/Videos/1920x1080p_30.00_x264_qp28.h264 \ > -vf "scale_qsv=1280:720:format=nv12,hwdownload" -pix_fmt nv12 -f null > /dev/null \ > -vf "scale_qsv=720:480:format=nv12,hwdownload" -pix_fmt nv12 -f null > /dev/null > > test results: > 2 scale 5 scale 10 scale > Improved 12% 21% 21% > > For CPU only 1 decode to N scaling: > ./ffmpeg -i ~/Videos/1920x1080p_30.00_x264_qp28.h264 \ > -vf "scale=1280:720" -pix_fmt nv12 -f null /dev/null \ > -vf "scale=720:480" -pix_fmt nv12 -f null /dev/null \ > -abr_pipeline > > test results: > 2 scale 5 scale 10 scale > Improved 25% 107% 148% > > Signed-off-by: Wang, Shaofei <shaofei.w...@intel.com> > Reviewed-by: Zhao, Jun <jun.z...@intel.com> > --- > fftools/ffmpeg.c | 238 > +++++++++++++++++++++++++++++++++++++++++++++--- > fftools/ffmpeg.h | 15 +++ > fftools/ffmpeg_filter.c | 6 ++ > fftools/ffmpeg_opt.c | 6 +- > 4 files changed, 251 insertions(+), 14 deletions(-)
breaks build when threads are not available CC fftools/ffprobe.o src/fftools/ffmpeg_filter.c: In function ‘init_simple_filtergraph’: src/fftools/ffmpeg_filter.c:231: error: ‘InputFilter’ has no member named ‘b_abr_thread_init’ make: *** [fftools/ffmpeg_filter.o] Error 1 make: *** Waiting for unfinished jobs.... [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Frequently ignored answer#1 FFmpeg bugs should be sent to our bugtracker. User questions about the command line tools should be sent to the ffmpeg-user ML. And questions about how to use libav* should be sent to the libav-user ML.
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