On Thu, 22 May 2025, 07:32 Jiawei, <jia...@iscas.ac.cn> wrote: > 在 2025/5/22 2:21, Frank Plowman 写道: > > On 21/05/2025 11:17, Jiawei wrote: > >> 在 2025/5/21 14:52, Nicolas George 写道: > >>> Jiawei (HE12025-05-21): > >>>> particularly improving > >>>> performance on x86_64 (AVX), ARM64 (SVE) and RISC-V(RVV) > architectures. > >>> Benchmark needed. > >>> > >>> Regards, > >> > >> Hi Nicolas, > >> > >> > >> Since I am a gcc developer, I'm not so familiar with the FFmpeg test > >> flow, here is my test process, > >> if there exists anything uncorrect, please point me out: > >> > >> > >> 1. Download the video bbb_sunflower_2160p_30fps_normal.mp4.zip > >> < > https://download.blender.org/demo/movies/BBB/bbb_sunflower_2160p_30fps_normal.mp4.zip > > > >> from https://download.blender.org/demo/movies/BBB/， > >> > >> ``` > >> > >> ffmpeg -i bbb_sunflower_2160p_30fps_normal.mp4 -t 60 -vf > >> "scale=1920:1080" -c:v libx265 -c:a libmp3lame 1080p_hevc_mp3.mp4 > >> ``` > >> > >> get the 1080p video as Benchmark test video > >> > >> > >> 2. Build two version of FFmpeg, one with the modify, another without > >> the patch modif, using the gcc 13.3 release version, > >> > >> verified with Intel(R) Core(TM) Ultra 9 285HX > >> > >> > >> Using patch: > >> > >> ``` > >> ./ffmpeg -benchmark -i ~/mp/1080p_hevc_mp3.mp4 -f null - > >> ffmpeg version N-119636-g96518c8d8d Copyright (c) 2000-2025 the FFmpeg > >> developers > >> built with gcc 13 (Ubuntu 13.3.0-6ubuntu2~24.04) > >> configuration: --prefix=/home/pz9115/ffpo --disable-ffplay > --arch=x64 > >> --extra-cflags=-O3 --enable-static --target-os=linux > >> libavutil 60. 2.100 / 60. 2.100 > >> libavcodec 62. 3.101 / 62. 3.101 > >> libavformat 62. 0.102 / 62. 0.102 > >> libavdevice 62. 0.100 / 62. 0.100 > >> libavfilter 11. 0.100 / 11. 0.100 > >> libswscale 9. 0.100 / 9. 0.100 > >> libswresample 6. 0.100 / 6. 0.100 > >> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from > >> '/home/pz9115/mp/1080p_hevc_mp3.mp4': > >> Metadata: > >> major_brand : isom > >> minor_version : 512 > >> compatible_brands: isomiso2mp41 > >> title : Big Buck Bunny, Sunflower version > >> artist : Blender Foundation 2008, Janus Bager Kristensen > 2013 > >> composer : Sacha Goedegebure > >> encoder : Lavf60.16.100 > >> comment : Creative Commons Attribution 3.0 - > >> http://bbb3d.renderfarming.net > >> genre : Animation > >> Duration: 00:01:00.00, start: 0.000000, bitrate: 1564 kb/s > >> Stream #0:0[0x1](und): Video: hevc (Main) (hev1 / 0x31766568), > >> yuv420p(tv, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 1429 kb/s, 30 > >> fps, 30 tbr, 15360 tbn (default) > >> Metadata: > >> handler_name : GPAC ISO Video Handler > >> vendor_id : [0][0][0][0] > >> encoder : Lavc60.31.102 libx265 > >> Stream #0:1[0x2](und): Audio: mp3 (mp3float) (mp4a / 0x6134706D), > >> 48000 Hz, stereo, fltp, 128 kb/s (default) > >> Metadata: > >> handler_name : GPAC ISO Audio Handler > >> vendor_id : [0][0][0][0] > >> Stream mapping: > >> Stream #0:0 -> #0:0 (hevc (native) -> wrapped_avframe (native)) > >> Stream #0:1 -> #0:1 (mp3 (mp3float) -> pcm_s16le (native)) > >> Press [q] to stop, [?] for help > >> Output #0, null, to 'pipe:': > >> Metadata: > >> major_brand : isom > >> minor_version : 512 > >> compatible_brands: isomiso2mp41 > >> title : Big Buck Bunny, Sunflower version > >> artist : Blender Foundation 2008, Janus Bager Kristensen > 2013 > >> composer : Sacha Goedegebure > >> genre : Animation > >> comment : Creative Commons Attribution 3.0 - > >> http://bbb3d.renderfarming.net > >> encoder : Lavf62.0.102 > >> Stream #0:0(und): Video: wrapped_avframe, yuv420p(tv, progressive), > >> 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 30 fps, 30 tbn (default) > >> Metadata: > >> encoder : Lavc62.3.101 wrapped_avframe > >> handler_name : GPAC ISO Video Handler > >> vendor_id : [0][0][0][0] > >> Stream #0:1(und): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s > >> (default) > >> Metadata: > >> encoder : Lavc62.3.101 pcm_s16le > >> handler_name : GPAC ISO Audio Handler > >> vendor_id : [0][0][0][0] > >> [out#0/null @ 0x565233669eb0] video:731KiB audio:11250KiB subtitle:0KiB > >> other streams:0KiB global headers:0KiB muxing overhead: unknown > >> frame= 1800 fps=635 q=-0.0 Lsize=N/A time=00:01:00.00 bitrate=N/A > >> speed=21.2x elapsed=0:00:02.83 > >> bench: utime=11.324s stime=0.290s rtime=2.834s > >> bench: maxrss=186556KiB > >> ``` > >> > >> Without patch(here I add the fno-tree-vectorize directly): > >> > >> ./ffmpeg -benchmark -i ~/mp/1080p_hevc_mp3.mp4 -f null - > >> ffmpeg version N-119636-g96518c8d8d Copyright (c) 2000-2025 the FFmpeg > >> developers > >> built with gcc 13 (Ubuntu 13.3.0-6ubuntu2~24.04) > >> configuration: --prefix=/home/pz9115/ffpo --disable-ffplay > --arch=x64 > >> --extra-cflags='-O3 -fno-tree-vectorize' --enable-static > --target-os=linux > >> libavutil 60. 2.100 / 60. 2.100 > >> libavcodec 62. 3.101 / 62. 3.101 > >> libavformat 62. 0.102 / 62. 0.102 > >> libavdevice 62. 0.100 / 62. 0.100 > >> libavfilter 11. 0.100 / 11. 0.100 > >> libswscale 9. 0.100 / 9. 0.100 > >> libswresample 6. 0.100 / 6. 0.100 > >> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from > >> '/home/pz9115/mp/1080p_hevc_mp3.mp4': > >> Metadata: > >> major_brand : isom > >> minor_version : 512 > >> compatible_brands: isomiso2mp41 > >> title : Big Buck Bunny, Sunflower version > >> artist : Blender Foundation 2008, Janus Bager Kristensen > 2013 > >> composer : Sacha Goedegebure > >> encoder : Lavf60.16.100 > >> comment : Creative Commons Attribution 3.0 - > >> http://bbb3d.renderfarming.net > >> genre : Animation > >> Duration: 00:01:00.00, start: 0.000000, bitrate: 1564 kb/s > >> Stream #0:0[0x1](und): Video: hevc (Main) (hev1 / 0x31766568), > >> yuv420p(tv, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 1429 kb/s, 30 > >> fps, 30 tbr, 15360 tbn (default) > >> Metadata: > >> handler_name : GPAC ISO Video Handler > >> vendor_id : [0][0][0][0] > >> encoder : Lavc60.31.102 libx265 > >> Stream #0:1[0x2](und): Audio: mp3 (mp3float) (mp4a / 0x6134706D), > >> 48000 Hz, stereo, fltp, 128 kb/s (default) > >> Metadata: > >> handler_name : GPAC ISO Audio Handler > >> vendor_id : [0][0][0][0] > >> Stream mapping: > >> Stream #0:0 -> #0:0 (hevc (native) -> wrapped_avframe (native)) > >> Stream #0:1 -> #0:1 (mp3 (mp3float) -> pcm_s16le (native)) > >> Press [q] to stop, [?] for help > >> Output #0, null, to 'pipe:': > >> Metadata: > >> major_brand : isom > >> minor_version : 512 > >> compatible_brands: isomiso2mp41 > >> title : Big Buck Bunny, Sunflower version > >> artist : Blender Foundation 2008, Janus Bager Kristensen > 2013 > >> composer : Sacha Goedegebure > >> genre : Animation > >> comment : Creative Commons Attribution 3.0 - > >> http://bbb3d.renderfarming.net > >> encoder : Lavf62.0.102 > >> Stream #0:0(und): Video: wrapped_avframe, yuv420p(tv, progressive), > >> 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 30 fps, 30 tbn (default) > >> Metadata: > >> encoder : Lavc62.3.101 wrapped_avframe > >> handler_name : GPAC ISO Video Handler > >> vendor_id : [0][0][0][0] > >> Stream #0:1(und): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s > >> (default) > >> Metadata: > >> encoder : Lavc62.3.101 pcm_s16le > >> handler_name : GPAC ISO Audio Handler > >> vendor_id : [0][0][0][0] > >> [out#0/null @ 0x55eb196b7eb0] video:731KiB audio:11250KiB subtitle:0KiB > >> other streams:0KiB global headers:0KiB muxing overhead: unknown > >> frame= 1800 fps=509 q=-0.0 Lsize=N/A time=00:01:00.00 bitrate=N/A > >> speed= 17x elapsed=0:00:03.53 > >> bench: utime=21.544s stime=0.349s rtime=3.536s > >> bench: maxrss=181580KiB > >> > >> And I also tested on a RISC-V develop board MUSE Pi Pro, Here following > >> is the configure and result: > >> > >> Using patch: > >> > >> root@spacemit-k1-x-MUSE-Pi-Pro-board:~# ./ffpv/bin/ffmpeg -benchmark -i > >> 1080p_hevc_mp3.mp4 -f null - > >> ffmpeg version n6.1.2 Copyright (c) 2000-2024 the FFmpeg developers > >> built with gcc 16.0.0 (g3fc902e738b) 20250519 (experimental) > >> configuration: --prefix=/home/pz9115/ffpv --disable-ffplay > >> --arch=riscv --extra-cflags='-march=rv64gcv_zba_zbb_zbs -O3 -ffast-math' > >> --cross-prefix=/home/pz9115/rvv/bin/riscv64-unknown-linux-gnu- > >> --cc=/home/pz9115/rvv/bin/riscv64-unknown-linux-gnu-gcc > >> --cxx=/home/pz9115/rvv/bin/riscv64-unknown-linux-gnu-g++ --enable-static > >> --enable-cross-compile --target-os=linux --disable-rvv > >> libavutil 58. 29.100 / 58. 29.100 > >> libavcodec 60. 31.102 / 60. 31.102 > >> libavformat 60. 16.100 / 60. 16.100 > >> libavdevice 60. 3.100 / 60. 3.100 > >> libavfilter 9. 12.100 / 9. 12.100 > >> libswscale 7. 5.100 / 7. 5.100 > >> libswresample 4. 12.100 / 4. 12.100 > >> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1080p_hevc_mp3.mp4': > >> Metadata: > >> major_brand : isom > >> minor_version : 512 > >> compatible_brands: isomiso2mp41 > >> title : Big Buck Bunny, Sunflower version > >> artist : Blender Foundation 2008, Janus Bager Kristensen > 2013 > >> composer : Sacha Goedegebure > >> encoder : Lavf60.16.100 > >> comment : Creative Commons Attribution 3.0 - > >> http://bbb3d.renderfarming.net > >> genre : Animation > >> Duration: 00:01:00.00, start: 0.000000, bitrate: 1564 kb/s > >> Stream #0:0[0x1](und): Video: hevc (Main) (hev1 / 0x31766568), > >> yuv420p(tv, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 1429 kb/s, 30 > >> fps, 30 tbr, 15360 tbn (default) > >> Metadata: > >> handler_name : GPAC ISO Video Handler > >> vendor_id : [0][0][0][0] > >> encoder : Lavc60.31.102 libx265 > >> Stream #0:1[0x2](und): Audio: mp3 (mp4a / 0x6134706D), 48000 Hz, > >> stereo, fltp, 128 kb/s (default) > >> Metadata: > >> handler_name : GPAC ISO Audio Handler > >> vendor_id : [0][0][0][0] > >> Stream mapping: > >> Stream #0:0 -> #0:0 (hevc (native) -> wrapped_avframe (native)) > >> Stream #0:1 -> #0:1 (mp3 (mp3float) -> pcm_s16le (native)) > >> Press [q] to stop, [?] for help > >> Odd rotation angle. > >> If you want to help, upload a sample of this file to > >> https://streams.videolan.org/upload/ and contact the ffmpeg-devel > >> mailing list. (ffmpeg-devel@ffmpeg.org)Output #0, null, to 'pipe:': > >> Metadata: > >> major_brand : isom > >> minor_version : 512 > >> compatible_brands: isomiso2mp41 > >> title : Big Buck Bunny, Sunflower version > >> artist : Blender Foundation 2008, Janus Bager Kristensen > 2013 > >> composer : Sacha Goedegebure > >> genre : Animation > >> comment : Creative Commons Attribution 3.0 - > >> http://bbb3d.renderfarming.net > >> encoder : Lavf60.16.100 > >> Stream #0:0(und): Video: wrapped_avframe, yuv420p(tv, progressive), > >> 1080x1920 [SAR 1:1 DAR 9:16], q=2-31, 200 kb/s, 30 fps, 30 tbn (default) > >> Metadata: > >> handler_name : GPAC ISO Video Handler > >> vendor_id : [0][0][0][0] > >> encoder : Lavc60.31.102 wrapped_avframe > >> Stream #0:1(und): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s > >> (default) > >> Metadata: > >> handler_name : GPAC ISO Audio Handler > >> vendor_id : [0][0][0][0] > >> encoder : Lavc60.31.102 pcm_s16le > >> [out#0/null @ 0x28a82e0] video:844kB audio:11250kB subtitle:0kB other > >> streams:0kB global headers:0kB muxing overhead: unknown > >> frame= 1800 fps= 42 q=-0.0 Lsize=N/A time=00:00:59.97 bitrate=N/A > >> speed=1.41x > >> bench: utime=207.150s stime=5.319s rtime=42.608s > >> bench: maxrss=162160kB > >> > >> Without patch(same added the fno-tree-vectorize directly): > >> > >> ./ffp/bin/ffmpeg -benchmark -i 1080p_hevc_mp3.mp4 -f null - > >> ffmpeg version n6.1.2 Copyright (c) 2000-2024 the FFmpeg developers > >> built with gcc 16.0.0 (g38163c874a3-dirty) 20250515 (experimental) > >> configuration: --prefix=/home/pz9115/ffp --disable-ffplay > >> --arch=riscv --sysroot=/home/pz9115/rv/sysroot > >> --extra-cflags='-march=rv64gcv_zba_zbb_zbc_zbs_zca_zcd -mabi=lp64d -O3 > >> -fno-tree-vectorize -static' --extra-ldflags=-static > >> --cross-prefix=/home/pz9115/rv/bin/riscv64-unknown-linux-gnu- > >> --enable-static --enable-cross-compile --target-os=linux --disable-rvv > >> libavutil 58. 29.100 / 58. 29.100 > >> libavcodec 60. 31.102 / 60. 31.102 > >> libavformat 60. 16.100 / 60. 16.100 > >> libavdevice 60. 3.100 / 60. 3.100 > >> libavfilter 9. 12.100 / 9. 12.100 > >> libswscale 7. 5.100 / 7. 5.100 > >> libswresample 4. 12.100 / 4. 12.100 > >> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1080p_hevc_mp3.mp4': > >> Metadata: > >> major_brand : isom > >> minor_version : 512 > >> compatible_brands: isomiso2mp41 > >> title : Big Buck Bunny, Sunflower version > >> artist : Blender Foundation 2008, Janus Bager Kristensen > 2013 > >> composer : Sacha Goedegebure > >> encoder : Lavf60.16.100 > >> comment : Creative Commons Attribution 3.0 - > >> http://bbb3d.renderfarming.net > >> genre : Animation > >> Duration: 00:01:00.00, start: 0.000000, bitrate: 1564 kb/s > >> Stream #0:0[0x1](und): Video: hevc (Main) (hev1 / 0x31766568), > >> yuv420p(tv, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 1429 kb/s, 30 > >> fps, 30 tbr, 15360 tbn (default) > >> Metadata: > >> handler_name : GPAC ISO Video Handler > >> vendor_id : [0][0][0][0] > >> encoder : Lavc60.31.102 libx265 > >> Stream #0:1[0x2](und): Audio: mp3 (mp4a / 0x6134706D), 48000 Hz, > >> stereo, fltp, 128 kb/s (default) > >> Metadata: > >> handler_name : GPAC ISO Audio Handler > >> vendor_id : [0][0][0][0] > >> Stream mapping: > >> Stream #0:0 -> #0:0 (hevc (native) -> wrapped_avframe (native)) > >> Stream #0:1 -> #0:1 (mp3 (mp3float) -> pcm_s16le (native)) > >> Press [q] to stop, [?] for help > >> Output #0, null, to 'pipe:': > >> Metadata: > >> major_brand : isom > >> minor_version : 512 > >> compatible_brands: isomiso2mp41 > >> title : Big Buck Bunny, Sunflower version > >> artist : Blender Foundation 2008, Janus Bager Kristensen > 2013 > >> composer : Sacha Goedegebure > >> genre : Animation > >> comment : Creative Commons Attribution 3.0 - > >> http://bbb3d.renderfarming.net > >> encoder : Lavf60.16.100 > >> Stream #0:0(und): Video: wrapped_avframe, yuv420p(tv, progressive), > >> 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 30 fps, 30 tbn (default) > >> Metadata: > >> handler_name : GPAC ISO Video Handler > >> vendor_id : [0][0][0][0] > >> encoder : Lavc60.31.102 wrapped_avframe > >> Stream #0:1(und): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s > >> (default) > >> Metadata: > >> handler_name : GPAC ISO Audio Handler > >> vendor_id : [0][0][0][0] > >> encoder : Lavc60.31.102 pcm_s16le > >> [out#0/null @ 0x2729630] video:844kB audio:11250kB subtitle:0kB other > >> streams:0kB global headers:0kB muxing overhead: unknown > >> frame= 1800 fps= 30 q=-0.0 Lsize=N/A time=00:00:59.97 bitrate=N/A > >> speed= 1x > >> bench: utime=321.145s stime=2.475s rtime=59.960s > >> bench: maxrss=131532kB > >> _______________________________________________ > >> ffmpeg-devel mailing list > >> ffmpeg-devel@ffmpeg.org > >> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > >> > >> To unsubscribe, visit link above, or email > >> ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". > > The RISC-V autovectorised output looks like it has a warning "Odd > > rotation angle" which is not present in the non-autovectorised output. > > I found this occured when using '-ffast-math' in RISC-V, also occur in > -O3 -ffast-math -fno-tree-vectorize case(much slower due to the > -ffast-math)，supplementary more comparison results here: > > No -ffast-math, no -fno-tree-vectorize > > root@spacemit-k1-x-MUSE-Pi-Pro-board:~# ./ffpv/bin/ffmpeg -benchmark -i > 1080p_hevc_mp3.mp4 -f null - > ffmpeg version N-119636-g96518c8d8d Copyright (c) 2000-2025 the FFmpeg > developers > built with gcc 16.0.0 (g3fc902e738b) 20250519 (experimental) > configuration: --prefix=/home/pz9115/ffpv --disable-ffplay > --arch=riscv --extra-cflags='-march=rv64gcv_zba_zbb_zbs -O3' > --extra-ldflags=-static > --cross-prefix=/home/pz9115/rvv/bin/riscv64-unknown-linux-gnu- > --cc=/home/pz9115/rvv/bin/riscv64-unknown-linux-gnu-gcc > --cxx=/home/pz9115/rvv/bin/riscv64-unknown-linux-gnu-g++ --enable-static > --enable-cross-compile --target-os=linux --disable-rvv > libavutil 60. 2.100 / 60. 2.100 > libavcodec 62. 3.101 / 62. 3.101 > libavformat 62. 0.102 / 62. 0.102 > libavdevice 62. 0.100 / 62. 0.100 > libavfilter 11. 0.100 / 11. 0.100 > libswscale 9. 0.100 / 9. 0.100 > libswresample 6. 0.100 / 6. 0.100 > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1080p_hevc_mp3.mp4': > Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2mp41 > title : Big Buck Bunny, Sunflower version > artist : Blender Foundation 2008, Janus Bager Kristensen 2013 > composer : Sacha Goedegebure > encoder : Lavf60.16.100 > comment : Creative Commons Attribution 3.0 - > http://bbb3d.renderfarming.net > genre : Animation > Duration: 00:01:00.00, start: 0.000000, bitrate: 1564 kb/s > Stream #0:0[0x1](und): Video: hevc (Main) (hev1 / 0x31766568), > yuv420p(tv, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 1429 kb/s, 30 > fps, 30 tbr, 15360 tbn (default) > Metadata: > handler_name : GPAC ISO Video Handler > vendor_id : [0][0][0][0] > encoder : Lavc60.31.102 libx265 > Stream #0:1[0x2](und): Audio: mp3 (mp3float) (mp4a / 0x6134706D), > 48000 Hz, stereo, fltp, 128 kb/s (default) > Metadata: > handler_name : GPAC ISO Audio Handler > vendor_id : [0][0][0][0] > Stream mapping: > Stream #0:0 -> #0:0 (hevc (native) -> wrapped_avframe (native)) > Stream #0:1 -> #0:1 (mp3 (mp3float) -> pcm_s16le (native)) > Press [q] to stop, [?] for help > Output #0, null, to 'pipe:': > Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2mp41 > title : Big Buck Bunny, Sunflower version > artist : Blender Foundation 2008, Janus Bager Kristensen 2013 > composer : Sacha Goedegebure > genre : Animation > comment : Creative Commons Attribution 3.0 - > http://bbb3d.renderfarming.net > encoder : Lavf62.0.102 > Stream #0:0(und): Video: wrapped_avframe, yuv420p(tv, progressive), > 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 30 fps, 30 tbn (default) > Metadata: > encoder : Lavc62.3.101 wrapped_avframe > handler_name : GPAC ISO Video Handler > vendor_id : [0][0][0][0] > Stream #0:1(und): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s > (default) > Metadata: > encoder : Lavc62.3.101 pcm_s16le > handler_name : GPAC ISO Audio Handler > vendor_id : [0][0][0][0] > [out#0/null @ 0x2b66150] video:731KiB audio:11250KiB subtitle:0KiB other > streams:0KiB global headers:0KiB muxing overhead: unknown > frame= 1800 fps= 48 q=-0.0 Lsize=N/A time=00:01:00.00 bitrate=N/A speed= > 1.6x elapsed=0:00:37.39 > bench: utime=165.301s stime=3.171s rtime=37.400s > bench: maxrss=130208KiB > > > ================================================================================================================================================================ > > Using -ffast-math with -fno-tree-vectorize: > > root@spacemit-k1-x-MUSE-Pi-Pro-board:~# ./ffp/bin/ffmpeg -benchmark -i > 1080p_hevc_mp3.mp4 -f null - > ffmpeg version N-119636-g96518c8d8d Copyright (c) 2000-2025 the FFmpeg > developers > built with gcc 16.0.0 (g3fc902e738b) 20250519 (experimental) > configuration: --prefix=/home/pz9115/ffpv --disable-ffplay > --arch=riscv --extra-cflags='-march=rv64gcv_zba_zbb_zbs -O3 -ffast-math > -fno-tree-vectorize' --extra-ldflags=-static > --cross-prefix=/home/pz9115/rvv/bin/riscv64-unknown-linux-gnu- > --cc=/home/pz9115/rvv/bin/riscv64-unknown-linux-gnu-gcc > --cxx=/home/pz9115/rvv/bin/riscv64-unknown-linux-gnu-g++ --enable-static > --enable-cross-compile --target-os=linux --disable-rvv > libavutil 60. 2.100 / 60. 2.100 > libavcodec 62. 3.101 / 62. 3.101 > libavformat 62. 0.102 / 62. 0.102 > libavdevice 62. 0.100 / 62. 0.100 > libavfilter 11. 0.100 / 11. 0.100 > libswscale 9. 0.100 / 9. 0.100 > libswresample 6. 0.100 / 6. 0.100 > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1080p_hevc_mp3.mp4': > Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2mp41 > title : Big Buck Bunny, Sunflower version > artist : Blender Foundation 2008, Janus Bager Kristensen 2013 > composer : Sacha Goedegebure > encoder : Lavf60.16.100 > comment : Creative Commons Attribution 3.0 - > http://bbb3d.renderfarming.net > genre : Animation > Duration: 00:01:00.00, start: 0.000000, bitrate: 1564 kb/s > Stream #0:0[0x1](und): Video: hevc (Main) (hev1 / 0x31766568), > yuv420p(tv, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 1429 kb/s, 30 > fps, 30 tbr, 15360 tbn (default) > Metadata: > handler_name : GPAC ISO Video Handler > vendor_id : [0][0][0][0] > encoder : Lavc60.31.102 libx265 > Stream #0:1[0x2](und): Audio: mp3 (mp3float) (mp4a / 0x6134706D), > 48000 Hz, stereo, fltp, 128 kb/s (default) > Metadata: > handler_name : GPAC ISO Audio Handler > vendor_id : [0][0][0][0] > Stream mapping: > Stream #0:0 -> #0:0 (hevc (native) -> wrapped_avframe (native)) > Stream #0:1 -> #0:1 (mp3 (mp3float) -> pcm_s16le (native)) > Press [q] to stop, [?] for help > Odd rotation angle. > If you want to help, upload a sample of this file to > https://streams.videolan.org/upload/ and contact the ffmpeg-devel > mailing list. (ffmpeg-devel@ffmpeg.org)Output #0, null, to 'pipe:': > Metadata: > major_brand : isom > minor_version : 512 > compatible_brands: isomiso2mp41 > title : Big Buck Bunny, Sunflower version > artist : Blender Foundation 2008, Janus Bager Kristensen 2013 > composer : Sacha Goedegebure > genre : Animation > comment : Creative Commons Attribution 3.0 - > http://bbb3d.renderfarming.net > encoder : Lavf62.0.102 > Stream #0:0(und): Video: wrapped_avframe, yuv420p(tv, progressive), > 1080x1920 [SAR 1:1 DAR 9:16], q=2-31, 200 kb/s, 30 fps, 30 tbn (default) > Metadata: > encoder : Lavc62.3.101 wrapped_avframe > handler_name : GPAC ISO Video Handler > vendor_id : [0][0][0][0] > Stream #0:1(und): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s > (default) > Metadata: > encoder : Lavc62.3.101 pcm_s16le > handler_name : GPAC ISO Audio Handler > vendor_id : [0][0][0][0] > [out#0/null @ 0x2915150] video:731KiB audio:11250KiB subtitle:0KiB other > streams:0KiB global headers:0KiB muxing overhead: unknown > frame= 1800 fps= 12 q=-0.0 Lsize=N/A time=00:01:00.00 bitrate=N/A > speed=0.391x elapsed=0:02:33.38 > bench: utime=445.912s stime=8.033s rtime=153.385s > bench: maxrss=2212516KiB > > > > > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". >
Here is a particularly bad example of autovectorisation across many compilers: https://gcc.godbolt.org/z/rjEqzf1hh Kieran > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
