ffmpeg h264_nvenc, "Aucun périphérique compatible NVENC trouvé"
J'essaie de faire fonctionner l'encodage matériel sur ffmpeg.
J'utilise Ubuntu 18.04 avec son noyau par défaut (4.15.0-50.54), le paquet ffmpeg (3.4.6-0ubuntu0.18.04.1) et les pilotes Nvidia (390.116-0ubuntu0.18.04.1)
Mon matériel est un Lenovo Thinkpad P40 Yoga avec un NVidia Quadro M500M (GM108GLM) qui est censé avoir PureVideo HD 6 (VP6). Je n'ai pas trouvé de liste des codecs, formats de pixels, débits et résolutions pris en charge par NVENC sur cette carte, mais il devrait au moins être capable d'encoder de simples vidéos H264. En fait, j'ai utilisé avec succès NVENC avec OBS (Open Broadcaster Software) sur le même ordinateur dans le passé.
Mais ffmpeg donne les messages suivants:
[h264_nvenc @ 0x562d21d512a0] Loaded Nvenc version 8.1
[h264_nvenc @ 0x562d21d512a0] Nvenc initialized successfully
[h264_nvenc @ 0x562d21d512a0] 1 CUDA capable devices found
[h264_nvenc @ 0x562d21d512a0] [ GPU #0 - < Quadro M500M > has Compute SM 5.0 ]
[h264_nvenc @ 0x562d21d512a0] OpenEncodeSessionEx failed: unsupported device (2)
[h264_nvenc @ 0x562d21d512a0] No NVENC capable devices found
[h264_nvenc @ 0x562d21d512a0] Nvenc unloaded
Que puis-je faire pour le réparer?
Voici la sortie complète:
$ ffmpeg -f lavfi -i testsrc=duration=10:size=1280x720:rate=30 -vcodec h264_nvenc test.mp4 -v 56
ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Splitting the commandline.
Reading option '-f' ... matched as option 'f' (force format) with argument 'lavfi'.
Reading option '-i' ... matched as input url with argument 'testsrc=duration=10:size=1280x720:rate=30'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'h264_nvenc'.
Reading option 'test.mp4' ... matched as output url.
Reading option '-v' ... matched as option 'v' (set logging level) with argument '56'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 56.
Successfully parsed a group of options.
Parsing a group of options: input url testsrc=duration=10:size=1280x720:rate=30.
Applying option f (force format) with argument lavfi.
Successfully parsed a group of options.
Opening an input file: testsrc=duration=10:size=1280x720:rate=30.
detected 4 logical cores
[Parsed_testsrc_0 @ 0x562d21d4b660] Setting 'duration' to value '10'
[Parsed_testsrc_0 @ 0x562d21d4b660] Setting 'size' to value '1280x720'
[Parsed_testsrc_0 @ 0x562d21d4b660] Setting 'rate' to value '30'
[Parsed_testsrc_0 @ 0x562d21d4b660] size:1280x720 rate:30/1 duration:10.000000 sar:1/1
[AVFilterGraph @ 0x562d21d4a840] query_formats: 2 queried, 1 merged, 0 already done, 0 delayed
[lavfi @ 0x562d21d498c0] All info found
[lavfi @ 0x562d21d498c0] stream 0: start_time: 0.000 duration: -307445734561825856.000
[lavfi @ 0x562d21d498c0] format: start_time: 0.000 duration: -9223372036854.775 bitrate=0 kb/s
Input #0, lavfi, from 'testsrc=duration=10:size=1280x720:rate=30':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0, 1, 1/30: Video: rawvideo, 1 reference frame (RGB[24] / 0x18424752), rgb24, 1280x720 [SAR 1:1 DAR 16:9], 0/1, 30 tbr, 30 tbn, 30 tbc
Successfully opened the file.
Parsing a group of options: output url test.mp4.
Applying option vcodec (force video codec ('copy' to copy stream)) with argument h264_nvenc.
Successfully parsed a group of options.
Opening an output file: test.mp4.
[file @ 0x562d21d6d720] Setting default whitelist 'file,crypto'
Successfully opened the file.
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_nvenc))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[rawvideo @ 0x562d21d4f740] PACKET SIZE: 2764800, STRIDE: 3840
[graph 0 input from stream 0:0 @ 0x562d21d6f9e0] Setting 'video_size' to value '1280x720'
[graph 0 input from stream 0:0 @ 0x562d21d6f9e0] Setting 'pix_fmt' to value '2'
[graph 0 input from stream 0:0 @ 0x562d21d6f9e0] Setting 'time_base' to value '1/30'
[graph 0 input from stream 0:0 @ 0x562d21d6f9e0] Setting 'pixel_aspect' to value '1/1'
[graph 0 input from stream 0:0 @ 0x562d21d6f9e0] Setting 'sws_param' to value 'flags=2'
[graph 0 input from stream 0:0 @ 0x562d21d6f9e0] Setting 'frame_rate' to value '30/1'
[graph 0 input from stream 0:0 @ 0x562d21d6f9e0] w:1280 h:720 pixfmt:rgb24 tb:1/30 fr:30/1 sar:1/1 sws_param:flags=2
[format @ 0x562d21d6e520] compat: called with args=[yuv420p|nv12|p010le|yuv444p|yuv444p16le|bgr0|rgb0|cuda]
[format @ 0x562d21d6e520] Setting 'pix_fmts' to value 'yuv420p|nv12|p010le|yuv444p|yuv444p16le|bgr0|rgb0|cuda'
[auto_scaler_0 @ 0x562d21d72da0] Setting 'flags' to value 'bicubic'
[auto_scaler_0 @ 0x562d21d72da0] w:iw h:ih flags:'bicubic' interl:0
[format @ 0x562d21d6e520] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_null_0' and the filter 'format'
[AVFilterGraph @ 0x562d21d6e7e0] query_formats: 4 queried, 2 merged, 1 already done, 0 delayed
[auto_scaler_0 @ 0x562d21d72da0] picking rgb0 out of 7 ref:rgb24 alpha:0
[swscaler @ 0x562d21d73b40] Forcing full internal H chroma due to input having non subsampled chroma
[auto_scaler_0 @ 0x562d21d72da0] w:1280 h:720 fmt:rgb24 sar:1/1 -> w:1280 h:720 fmt:rgb0 sar:1/1 flags:0x4
Loaded lib: libcuda.so.1
Loaded sym: cuInit
Loaded sym: cuDeviceGetCount
Loaded sym: cuDeviceGet
Loaded sym: cuDeviceGetName
Loaded sym: cuDeviceComputeCapability
Loaded sym: cuCtxCreate_v2
Loaded sym: cuCtxPushCurrent_v2
Loaded sym: cuCtxPopCurrent_v2
Loaded sym: cuCtxDestroy_v2
Loaded sym: cuMemAlloc_v2
Loaded sym: cuMemFree_v2
Loaded sym: cuMemcpy2D_v2
Loaded sym: cuGetErrorName
Loaded sym: cuGetErrorString
Loaded lib: libnvidia-encode.so.1
Loaded sym: NvEncodeAPICreateInstance
Loaded sym: NvEncodeAPIGetMaxSupportedVersion
[h264_nvenc @ 0x562d21d512a0] Loaded Nvenc version 8.1
[h264_nvenc @ 0x562d21d512a0] Nvenc initialized successfully
[h264_nvenc @ 0x562d21d512a0] 1 CUDA capable devices found
[h264_nvenc @ 0x562d21d512a0] [ GPU #0 - < Quadro M500M > has Compute SM 5.0 ]
[h264_nvenc @ 0x562d21d512a0] OpenEncodeSessionEx failed: unsupported device (2)
[h264_nvenc @ 0x562d21d512a0] No NVENC capable devices found
[h264_nvenc @ 0x562d21d512a0] Nvenc unloaded
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
[AVIOContext @ 0x562d21d6d7a0] Statistics: 0 seeks, 0 writeouts
Conversion failed!
Malheureusement, la raison en est qu'il n'y a pas de périphérique compatible NVENC sur votre ordinateur. Comme vous pouvez le lire sur NVIDIA documentation Video Codec SDK , GM108 n'est pas pris en charge (ni NVENC ni NVDEC ).