#11613: ffv1_vulkan and level 4 does not work well
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Reporter: Andrew-R | Type: defect
Status: new | Priority: normal
Component: avcodec | Version: git-master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
How to reproduce:
{{{
bash-5.1$ RADV_PERFTEST=video_decode ~/bin/ffmpeg8-vk -init_hw_device
vulkan -hwaccel vulkan -hwaccel_output_format vulkan -i ~/6029.mp4 -an
-c:v ffv1_vulkan -level 4 -strict -2 -vframes 1000 frame-ffv1-vulkan.mkv
ffmpeg version N-118546-g903b085f91 Copyright (c) 2000-2025 the FFmpeg
developers
built with gcc 11.2.0 (GCC)
configuration: --enable-opencl --disable-debug --enable-libx265
--enable-libx264 --enable-gpl --enable-libplacebo --enable-vulkan
--enable-libshaderc --enable-libzimg --enable-libaom --enable-libdav1d
--enable-libsoxr --enable-libfontconfig --enable-libfreetype --enable-
libfribidi --enable-gnutls --enable-libass --enable-libbluray --enable-
libcdio --enable-frei0r --enable-libgsm --enable-openal --enable-libopus
--enable-librtmp --enable-libsnappy --enable-libspeex --enable-libssh
--enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-
libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp
libavutil 60. 3.100 / 60. 3.100
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/guest/6029.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42isomavc1
creation_time : 2011-06-24T09:52:37.000000Z
encoder : HandBrake 0.9.5 2011043000
Duration: 01:28:31.60, start: 0.000000, bitrate: 789 kb/s
Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661),
yuv420p(tv, smpte170m/smpte170m/bt709, progressive), 720x400, 657 kb/s, 25
fps, 25 tbr, 90k tbn (default)
Metadata:
creation_time : 2011-06-24T09:52:37.000000Z
vendor_id : [0][0][0][0]
encoder : JVT/AVC Coding
Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 127 kb/s (default)
Metadata:
creation_time : 2011-06-24T09:52:37.000000Z
vendor_id : [0][0][0][0]
File 'frame-ffv1-vulkan.mkv' already exists. Overwrite? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> ffv1 (ffv1_vulkan))
Press [q] to stop, [?] for help
[ffv1_vulkan @ 0xc85f1c0] Async buffers: 0MiB per context, 0MiB total,
depth: 1
Output #0, matroska, to 'frame-ffv1-vulkan.mkv':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42isomavc1
encoder : Lavf62.0.102
Stream #0:0(und): Video: ffv1 (FFV1 / 0x31564646), vulkan(tv,
smpte170m/smpte170m/bt709, progressive), 720x400, q=2-31, 200 kb/s, 25
fps, 1k tbn (default)
Metadata:
encoder : Lavc62.3.101 ffv1_vulkan
creation_time : 2011-06-24T09:52:37.000000Z
vendor_id : [0][0][0][0]
[out#0/matroska @ 0xc85d980] video:83357KiB audio:0KiB subtitle:0KiB other
streams:0KiB global headers:0KiB muxing overhead: 0.053416%
frame= 1000 fps= 44 q=-0.0 Lsize= 83402KiB time=00:00:40.00
bitrate=17080.6kbits/s speed=1.77x elapsed=0:00:22.62
}}}
Resulting file is uplayable:
{{{
bash-5.1$ mpv frame-ffv1-vulkan.mkv
(+) Video --vid=1 (*) (ffv1 720x400 25.000fps)
[ffmpeg/video] ffv1: CRC mismatch 1ED3EEA2!
Could not open codec.
Decoder init failed for ffv1
Failed to initialize a decoder for codec 'ffv1'.
Video: no video
No video or audio streams selected.
Exiting... (Errors when loading file)
}}}
Note that same problem seem to exist in sw ffv1 encoder.
Without -level 4 Vulkan encoder complains:
{{{
[ffv1_vulkan @ 0xc8e2b80] Encoding frames with subsampling and unaligned
dimensions is only supported in version 4 (-level 4)
}}}
while sw encoder works fine.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11613>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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