#11659: Regression: cannot use frames with alpha channel on vulkan
-------------------------------------+-------------------------------------
Reporter: bermond | Type: defect
Status: new | Priority: normal
Component: avutil | Version: git-
Keywords: vulkan | master
alpha | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Vulkan cannot be used anymore with frames that have an alpha channel. It
looks like there is a failure when allocating Vulkan frames, giving the
message `No memory type found for flags 0x1`.
How to reproduce:
{{{
$ ffmpeg -init_hw_device vulkan=gpu:0 -filter_hw_device gpu -f lavfi -i
'color=color=white:size=1280x720' -vf
'format=bgra,hwupload,hwdownload,format=bgra' -t 20 -f null -
ffmpeg version N-120203-geb52251c0a Copyright (c) 2000-2025 the FFmpeg
developers
built with gcc 15.1.1 (GCC) 20250425
configuration: --prefix=/usr --disable-debug --disable-static --disable-
stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto
--enable-fontconfig --enable-frei0r --enable-gmp --enable-gnutls --enable-
gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray
--enable-libbs2b --enable-libdav1d --enable-libdrm --enable-libdvdnav
--enable-libdvdread --enable-libfreetype --enable-libfribidi --enable-
libglslang --enable-libgsm --enable-libharfbuzz --enable-libiec61883
--enable-libjack --enable-libjxl --enable-libmodplug --enable-libmp3lame
--enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg
--enable-libopenmpt --enable-libopus --enable-libplacebo --enable-libpulse
--enable-librav1e --enable-librsvg --enable-librubberband --enable-
libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-
libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-
libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpl --enable-
libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb
--enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq
--enable-nvdec --enable-nvenc --enable-opencl --enable-opengl --enable-
shared --enable-vapoursynth --enable-version3 --enable-vulkan
libavutil 60. 4.101 / 60. 4.101
libavcodec 62. 5.100 / 62. 5.100
libavformat 62. 1.101 / 62. 1.101
libavdevice 62. 0.100 / 62. 0.100
libavfilter 11. 1.100 / 11. 1.100
libswscale 9. 0.100 / 9. 0.100
libswresample 6. 0.100 / 6. 0.100
Input #0, lavfi, from 'color=color=white:size=1280x720':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: wrapped_avframe, yuv420p, 1280x720 [SAR 1:1 DAR
16:9], 25 fps, 25 tbr, 25 tbn
Stream mapping:
Stream #0:0 -> #0:0 (wrapped_avframe (native) -> wrapped_avframe
(native))
Press [q] to stop, [?] for help
[Vulkan @ 0x562c35258e00] No memory type found for flags 0x1
[hwupload @ 0x7f33380046c0] Failed to allocate frame to upload to.
[vf#0:0 @ 0x562c353fa5c0] Error while filtering: Cannot allocate memory
[vf#0:0 @ 0x562c353fa5c0] Task finished with error code: -12 (Cannot
allocate memory)
[vf#0:0 @ 0x562c353fa5c0] Terminating thread with return code -12 (Cannot
allocate memory)
[vost#0:0/wrapped_avframe @ 0x562c353f9c80] [enc:wrapped_avframe @
0x562c353fa0c0] Could not open encoder before EOF
[vost#0:0/wrapped_avframe @ 0x562c353f9c80] Task finished with error code:
-22 (Invalid argument)
[vost#0:0/wrapped_avframe @ 0x562c353f9c80] Terminating thread with return
code -22 (Invalid argument)
[out#0/null @ 0x562c353f9900] Nothing was written into output file,
because at least one of its streams received no packets.
frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A speed=N/A
elapsed=0:00:00.00
Conversion failed!
}}}
This same command works nice with FFmpeg 7.1.1 and also with commit
bddb9c232dbdfa2c1402c7c56f77e5e6c7fda60f (the last usable one before the
soname version bumps), but fails in the current git master. So, it seems
to be a regression.
A git bisect shows the offending commit as being:
a9b2c10eee9cf28ecbce2f1972564f4aa826a855.
Notice that the offending commit does not compile, needing a fix from
commit 3ac7d70291838d71a28cd31a5774bb69745d4216, which also fails to use
frames with alpha channel on Vulkan.
System information:
- OS: Arch Linux
- Vulkan Headers: 1.4.313.0
- Vulkan ICD Loader: 1.4.313.0
- Vulkan GPU Hardware: NVIDIA RTX 3060
- GPU driver: 575.64.03 (NVIDIA open source driver)
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11659>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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