[FFmpeg-trac] #11609(avcodec:new): Vulkan ffv1 hw decode broken at least for 1920x1080 test file

[FFmpeg]

#11609: Vulkan ffv1 hw decode broken at least for 1920x1080 test file
----------------------------------+--------------------------------------
             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         |
----------------------------------+--------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 bash-5.1$ ~/bin/ffmpeg8-vk -hwaccel vulkan -hwaccel_output_format vulkan
 -i ~/1-ffv1.avi -vf hwdownload,format=yuv420p -vframes 1 /dev/shm/vulkan-
 test3.png
 ffmpeg version N-118190-g8bb682d454 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.  2.100 / 60.  2.100
   libavcodec     62.  0.101 / 62.  0.101
   libavformat    62.  0.100 / 62.  0.100
   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
   libpostproc    59.  1.100 / 59.  1.100
 [aist#0:1/pcm_s16le @ 0xb406540] Guessed Channel Layout: stereo
 Input #0, avi, from '/home/guest/1-ffv1.avi':
   Metadata:
     software        : Lavf58.56.100
   Duration: 00:01:03.40, start: 0.000000, bitrate: 91562 kb/s
   Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv420p, 1920x1080, 90191
 kb/s, 30 fps, 30 tbr, 30 tbn
   Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo,
 s16, 1411 kb/s
 File '/dev/shm/vulkan-test3.png' already exists. Overwrite? [y/N] y
 Stream mapping:
   Stream #0:0 -> #0:0 (ffv1 (native) -> png (native))
 Press [q] to stop, [?] for help
 Output #0, image2, to '/dev/shm/vulkan-test3.png':
   Metadata:
     software        : Lavf58.56.100
     encoder         : Lavf62.0.100
   Stream #0:0: Video: png, rgb24(pc, gbr/unknown/unknown, progressive),
 1920x1080, q=2-31, 200 kb/s, 30 fps, 30 tbn
     Metadata:
       encoder         : Lavc62.0.101 png
 [image2 @ 0xb422ac0] The specified filename '/dev/shm/vulkan-test3.png'
 does not contain an image sequence pattern or a pattern is invalid.
 [image2 @ 0xb422ac0] Use a pattern such as %03d for an image sequence or
 use the -update option (with -frames:v 1 if needed) to write a single
 image.
 [out#0/image2 @ 0xb407a40] video:1318KiB audio:0KiB subtitle:0KiB other
 streams:0KiB global headers:0KiB muxing overhead: unknown
 frame=    1 fps=0.1 q=-0.0 Lsize=N/A time=00:00:00.03 bitrate=N/A
 speed=0.00217x

 }}}

 Resulted vulkan-test3.png jus plain broken

 Doing similar decode but w/o Vulkan gives ok png
 {{{
 ~/bin/ffmpeg8-vk -i ~/1-ffv1.avi -vframes 1 /dev/shm/vulkan-
 test3-novulkan.png
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11609>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker