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• FFMPEG hevc_nvenc "No NVENC capable devices found" with NVidia GTX950M

  13 mai 2017, par NaturalBornCamper

  I get the error "No NVENC capable devices found" when trying a simple encoding like this, even skipping audio to make sure it’s not an audio problem :

  ffmpeg.exe -i input.mp4 -c:v hevc_nvenc -an out.mp4

  I also tried with more details, like setting the pixel format, the preset, the rate-control, the format.

  On the documentation page there :
  https://trac.ffmpeg.org/wiki/HWAccelIntro
  it says that if we get this error we should check for the pixel format. The video has yuv420p here and even specifying the format results in the same error.

  i also checked the NVidia supported cards and it says GeForce, but no details about the models :
  https://developer.nvidia.com/video-encode-decode-gpu-support-matrix#Encoder

  I tried h264_nvenc and it works perfectly however, the problem is only with hevc_nvenc
  Has anyone encountered this problem ?

  Complete console output :

  [h264 @ 0000000002534560] Reinit context to 1280x544, pix_fmt: yuv420p
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isom
  
      creation_time   : 2014-05-23T13:04:15.000000Z
  
    Duration: 01:54:03.95, start: 0.000000, bitrate: 3193 kb/s
  
      Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1280x544 [SAR 1:1 DAR 40:17], 2750 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        creation_time   : 2014-05-23T11:25:27.000000Z
  
      Stream #0:1(spa): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 439 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-05-23T12:56:43.000000Z
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> hevc (hevc_nvenc))
  
  Press [q] to stop, [?] for help
  
  [h264 @ 000000000260ea40] Reinit context to 1280x544, pix_fmt: yuv420p
  
  [graph 0 input from stream 0:0 @ 0000000003857ec0] w:1280 h:544 pixfmt:yuv420p tb:1/24000 fr:24000/1001 sar:1/1 sws_param:flags=2
  
  [hevc_nvenc @ 00000000038574e0] Loaded Nvenc version 8.0
  
  [hevc_nvenc @ 00000000038574e0] Nvenc initialized successfully
  
  [hevc_nvenc @ 00000000038574e0] 1 CUDA capable devices found
  
  [hevc_nvenc @ 00000000038574e0] [ GPU #0 - < GeForce GTX 950M > has Compute SM 5.0 ]
  
  [hevc_nvenc @ 00000000038574e0] Codec not supported
  
  [hevc_nvenc @ 00000000038574e0] No NVENC capable devices found
  
  [hevc_nvenc @ 00000000038574e0] 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
  
  Conversion failed!

• compat : remove in-tree NVidia headers

  26 février 2018, par Timo Rothenpieler

  compat : remove in-tree NVidia headers
  External headers are no longer welcome in the ffmpeg codebase because they
  
  increase the maintenance burden. However, in the NVidia case the vanilla
  
  headers need some modifications to be usable in ffmpeg therefore we still
  
  provide them, but in a separate repository.
  The external headers can be found at
  
  https://git.videolan.org/?p=ffmpeg/nv-codec-headers.git
  Fate-source is updated because of the deleted files, and dynlink_loader.h
  
  license headers were updated with the standard FFmpeg headers.
  Signed-off-by : Marton Balint <cus@passwd.hu>
  
  Signed-off-by : Timo Rothenpieler <timo@rothenpieler.org>
  

  • [DH] Changelog
  • [DH] compat/cuda/dynlink_cuda.h
  • [DH] compat/cuda/dynlink_cuviddec.h
  • [DH] compat/cuda/dynlink_loader.h
  • [DH] compat/cuda/dynlink_nvcuvid.h
  • [DH] compat/nvenc/nvEncodeAPI.h
  • [DH] configure
  • [DH] libavcodec/nvenc.h
  • [DH] tests/ref/fate/source

• lavc/vaapi_encode : Don't return error if the underlying driver doesn't support B...

  6 février 2018, par Haihao Xiang

  lavc/vaapi_encode : Don't return error if the underlying driver doesn't support B frames
  The underlying driver need not support B frames - since they are enabled
  
  by default for some codecs, it is better to disable them rather than
  
  returning an error in this case.  This makes the default settings usable
  
  for low-power encoding on Intel platforms.
  Signed-off-by : Haihao Xiang <haihao.xiang@intel.com>
  
  Signed-off-by : Mark Thompson <sw@jkqxz.net>
  

  • [DH] libavcodec/vaapi_encode.c