On 11/2/15, Nikita Skiba <[email protected]> wrote: > Hello, > > I have recently updated FFmpeg libraries, used by our software from 2.2.3 > to 2.7.2. Then, after some simple performance tests on Windows I've > surprisingly found, that performance of decoding MJPEG, H264 in 2.7.2 > approx. 10-20% worse than in 2.2.3. In contrast, H265/HEVC decoding > performance in 2.7.2 is better than in 2.2.3. > > Why does this performance degradation happen? Could it be because of > different build configuration? Could it be a normal phenomenon for > ffmpeg software evolution? > > Build configurations: > ffmpeg version 2.2.3 Copyright (c) 2000-2014 the FFmpeg developers > built on Jun 3 2014 13:32:59 with gcc 4.8.2 (GCC)
GCC > configuration: --enable-shared --disable-static --enable-memalign-hack > --disable-dxva2 --extra-cflags=-U__STRICT_ANSI__ > --prefix=/s/src/ffmpeg/build-2.2.3 > --shlibdir=/s/src/ffmpeg/build-2.2.3/bin/x86_64 --build-suffix=-itv-2.2.3 > --bindir=/s/src/ffmpeg/build-2.2.3/bin/x86_64 > --libdir=/s/src/ffmpeg/build-2.2.3/lib/x86_64 --enable-runtime-cpudetect > --enable-w32threads --target-os=mingw32 --cross-prefix=x86_64-w64-mingw32- > --arch=x86_64 > libavutil 52. 66.100 / 52. 66.100 > libavcodec 55. 52.102 / 55. 52.102 > libavformat 55. 33.100 / 55. 33.100 > libavdevice 55. 10.100 / 55. 10.100 > libavfilter 4. 2.100 / 4. 2.100 > libswscale 2. 5.102 / 2. 5.102 > libswresample 0. 18.100 / 0. 18.100 > > versus: > ffmpeg version 2.7.2 Copyright (c) 2000-2015 the FFmpeg developers > built with Microsoft (R) C/C++ Optimizing Compiler Version 18.00.21005.1 > for x64 Microsoft > configuration: --toolchain=msvc --enable-shared --disable-static > --enable-memalign-hack --disable-dxva2 --extra-cflags=-U__STRICT_ANSI__ > --prefix=/home/nikita.skiba/build-2.7.2 > --shlibdir=/home/nikita.skiba/build-2.7.2/bin/x86_64 > --build-suffix=-itv-2.7.2 > --bindir=/home/nikita.skiba/build-2.7.2/bin/x86_64 > --libdir=/home/nikita.skiba/build-2.7.2/lib/x86_64 > --enable-runtime-cpudetect --enable-w32threads --arch=x86_64 > libavutil 54. 27.100 / 54. 27.100 > libavcodec 56. 41.100 / 56. 41.100 > libavformat 56. 36.100 / 56. 36.100 > libavdevice 56. 4.100 / 56. 4.100 > libavfilter 5. 16.101 / 5. 16.101 > libswscale 3. 1.101 / 3. 1.101 > libswresample 1. 2.100 / 1. 2.100 > > The same for x86_32 arch. > > p.s. I've already created a post on Zeranoe's forum but nobody answered( > > You can find detailed benchmark listings for some codecs there: > https://ffmpeg.zeranoe.com/forum/viewtopic.php?f=15&t=2752 > > Thank in advance, > Nikita Skiba > _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
