From: Jiawei <jiawei@iscas.ac.cn>
To: ffmpeg-devel@ffmpeg.org
Cc: post@frankplowman.com
Subject: Re: [FFmpeg-devel] gcc: Remove auto-vectorization limitation.
Date: Thu, 22 May 2025 14:32:18 +0800
Message-ID: <09d91570-6c20-49a7-aada-ceb18d77c6c3@iscas.ac.cn> (raw)
In-Reply-To: <49f0532f-444c-4881-982a-26ed53e5e4b0@frankplowman.com>
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-request@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
>
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next prev parent reply other threads:[~2025-05-22 6:32 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-21 6:17 Jiawei
2025-05-21 6:52 ` Nicolas George
2025-05-21 10:17 ` Jiawei
2025-05-21 18:21 ` Frank Plowman
2025-05-22 6:32 ` Jiawei [this message]
2025-05-24 1:46 ` Kieran Kunhya via ffmpeg-devel
2025-05-24 4:10 ` Jiawei
2025-05-24 16:10 ` Rémi Denis-Courmont
2025-05-25 21:37 ` Michael Niedermayer
2025-05-26 8:43 ` Rémi Denis-Courmont
2025-05-30 0:46 ` Michael Niedermayer
2025-05-30 6:58 ` Rémi Denis-Courmont
2025-05-31 13:39 ` Michael Niedermayer
2025-06-03 16:14 ` Niklas Haas
2025-06-04 11:13 ` Rémi Denis-Courmont
2025-05-21 7:46 ` Michael Niedermayer
2025-05-21 10:32 ` Jiawei
2025-05-21 11:09 ` Michael Niedermayer
2025-05-21 9:04 ` Zhao Zhili
2025-05-21 10:26 ` Jiawei
2025-05-21 10:33 ` Andreas Rheinhardt
2025-05-21 12:09 ` Martin Storsjö
2025-05-21 12:14 ` Andreas Rheinhardt
2025-05-21 12:22 ` Martin Storsjö
2025-05-21 18:12 ` softworkz .
2025-05-24 12:00 ` Rémi Denis-Courmont
2025-05-21 10:08 Jiawei
2025-05-21 10:14 Jiawei
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