On Wed, Jan 09, 2019 at 03:50:03PM -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 <[email protected]> > Reviewed-by: Zhao, Jun <[email protected]> > --- > fftools/ffmpeg.c | 239 > +++++++++++++++++++++++++++++++++++++++++++++--- > fftools/ffmpeg.h | 14 +++ > fftools/ffmpeg_filter.c | 6 ++ > fftools/ffmpeg_opt.c | 6 +- > 4 files changed, 251 insertions(+), 14 deletions(-)
fails to build on mingw64
CC fftools/ffmpeg_filter.o
src/fftools/ffmpeg_filter.c: In function ‘init_simple_filtergraph’:
src/fftools/ffmpeg_filter.c:231:39: error: incompatible types when assigning to
type ‘pthread_t’ from type ‘int’
ist->filters[i]->f_thread = 0;
^
make: *** [fftools/ffmpeg_filter.o] Error 1
CC fftools/ffmpeg.o
src/fftools/ffmpeg.c: In function ‘pipeline_reap_filters’:
src/fftools/ffmpeg.c:1534:5: warning: ISO C90 forbids mixed declarations and
code [-Wdeclaration-after-statement]
OutputStream *ost = output_streams[i];
^
src/fftools/ffmpeg.c: In function ‘do_streamcopy’:
src/fftools/ffmpeg.c:2179:5: warning: ‘av_copy_packet_side_data’ is deprecated
(declared at src/libavcodec/avcodec.h:4424) [-Wdeprecated-declarations]
av_copy_packet_side_data(&opkt, pkt);
^
src/fftools/ffmpeg.c: In function ‘filter_pipeline’:
src/fftools/ffmpeg.c:2412:5: warning: ‘return’ with no value, in function
returning non-void [enabled by default]
return;
^
src/fftools/ffmpeg.c: In function ‘send_frame_to_filters’:
src/fftools/ffmpeg.c:2451:17: error: wrong type argument to unary exclamation
mark
if (!ist->filters[i]->f_thread) {
^
src/fftools/ffmpeg.c: In function ‘init_output_stream’:
src/fftools/ffmpeg.c:3754:9: warning: ‘avcodec_copy_context’ is deprecated
(declared at src/libavcodec/avcodec.h:4196) [-Wdeprecated-declarations]
ret = avcodec_copy_context(ost->st->codec, ost->enc_ctx);
^
src/fftools/ffmpeg.c:3754:9: warning: ‘codec’ is deprecated (declared at
src/libavformat/avformat.h:878) [-Wdeprecated-declarations]
src/fftools/ffmpeg.c:3800:9: warning: ‘codec’ is deprecated (declared at
src/libavformat/avformat.h:878) [-Wdeprecated-declarations]
ost->st->codec->codec= ost->enc_ctx->codec;
^
src/fftools/ffmpeg.c: In function ‘check_keyboard_interaction’:
src/fftools/ffmpeg.c:4181:13: warning: ‘codec’ is deprecated (declared at
src/libavformat/avformat.h:878) [-Wdeprecated-declarations]
debug = input_streams[0]->st->codec->debug<<1;
^
src/fftools/ffmpeg.c:4204:13: warning: ‘codec’ is deprecated (declared at
src/libavformat/avformat.h:878) [-Wdeprecated-declarations]
input_streams[i]->st->codec->debug = debug;
^
make: *** [fftools/ffmpeg.o] Error 1
make: Target `all' not remade because of errors.
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Good people do not need laws to tell them to act responsibly, while bad
people will find a way around the laws. -- Plato
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