#11655: Cuda/nvdec hwaccel outputs P016LE instead of P010LE on 10bit video
-------------------------------------+-------------------------------------
Reporter: nyanmisaka | Owner: Timo
| Rothenpieler <timo@…>
Type: defect | Status: closed
Priority: normal | Component: avcodec
Version: git-master | Resolution: fixed
Keywords: cuda nvdec | Blocked By:
nvidia hwaccel |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by nyanmisaka):
Replying to [comment:11 Timo R.]:
> And I can't see anything wrong in cuviddec.c, it correctly outputs P010
for 10 bit 420.
Hi Timo, you can use this command line to reproduce the problem in CUVID.
And here is the log:
{{{
ffmpeg -v quiet -f lavfi -i nullsrc=s=1920x1080,format=p010le \
-c:v hevc_nvenc -vframes 1 -f nut - | ffmpeg -c:v hevc_cuvid -i - -f null
-
ffmpeg version N-120169-g0fe9f25e76-20250704 Copyright (c) 2000-2025 the
FFmpeg developers
built with gcc 15.1.0 (crosstool-NG 1.27.0.42_35c1e72)
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
--pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
--target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
--disable-w32threads --enable-pthreads --enable-iconv --enable-zlib
--enable-libfribidi --enable-gmp --enable-libxml2 --enable-lzma --enable-
fontconfig --enable-libharfbuzz --enable-libfreetype --enable-libvorbis
--enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb
--disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-
avisynth --enable-chromaprint --enable-libdav1d --enable-libdavs2
--enable-libdvdread --enable-libdvdnav --disable-libfdk-aac --enable-
ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-
libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray
--enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist
--enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp
--enable-libzmq --enable-lv2 --enable-libvpl --enable-openal --enable-
liboapv --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-
libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e
--enable-librubberband --enable-schannel --enable-sdl2 --enable-libsnappy
--enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame
--enable-libuavs3d --disable-libdrm --enable-vaapi --enable-libvidstab
--enable-vulkan --enable-libshaderc --enable-libplacebo --enable-libvvenc
--enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid
--enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC
--extra-cxxflags= --extra-libs=-lgomp --extra-ldflags=-pthread --extra-
ldexeflags= --cc=x86_64-w64-mingw32-gcc --cxx=x86_64-w64-mingw32-g++
--ar=x86_64-w64-mingw32-gcc-ar --ranlib=x86_64-w64-mingw32-gcc-ranlib
--nm=x86_64-w64-mingw32-gcc-nm --extra-version=20250704
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, nut, from 'fd:':
Metadata:
encoder : Lavf62.1.101
Duration: N/A, bitrate: N/A
Stream #0:0: Video: hevc (Main 10) (HEVC / 0x43564548), yuv420p10le(tv),
1920x1080 [SAR 1:1 DAR 16:9], 25 tbr, 51200 tbn
Metadata:
encoder : Lavc62.5.100 hevc_nvenc
Stream mapping:
Stream #0:0 -> #0:0 (hevc (hevc_cuvid) -> wrapped_avframe (native))
Output #0, null, to 'pipe:':
Metadata:
encoder : Lavf62.1.101
Stream #0:0: Video: wrapped_avframe, p016le(tv, progressive), 1920x1080
[SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn
Metadata:
encoder : Lavc62.5.100 wrapped_avframe
[out#0/null @ 000001474eee9ec0] video:0KiB audio:0KiB subtitle:0KiB other
streams:0KiB global headers:0KiB muxing overhead: unknown
frame= 1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.16 bitrate=N/A
speed=7.97x elapsed=0:00:00.02
}}}
As you can see, the CUVID decoder is outputting P016 format.
{{{
Stream #0:0: Video: wrapped_avframe, p016le(tv, progressive), 1920x1080
[SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11655#comment:13>
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