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• fluent-ffmpeg video merge with hardware acceleration using NVIDIA graphics card

  23 août 2018, par krisalay

  I am trying to concatenate videos to one single .mp4 file.

  If I am not using hardware acceleration then the merge is working fine.

  However, when I provide -hwaccel cuvid as inputOptions and -c:v h264_nvenc as outputOptions then it throws error :

  ffmpeg exited with code 1: 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

  The code :

  ffmpeg
  
  .input('video1.mp4')
  
  .input('video2.mp4')
  
  .inputOptions(['-loglevel error','-hwaccel cuvid'])
  
  .outputOptions('-c:v h264_nvenc')
  
  .mergeToFile('filepath.mp4')

  What could be the possible reason for the error ? And what can be the solution to resolve the error ?

• FFMPEG hardware acceleration in Windows Scheduled Task [closed]

  25 mars 2022, par cfairer

  I'm setting up an unattended Windows 10 machine that will stream video from an RTSP nest cam feed using FFMPEG and Apache.
As it will be unattended and will lose power for six hours a day, I have created a Scheduled Task to run at boot without a user logged to run ffmpeg.

  


  It all works fine with conventional encoders for task started automatically or manually by Windows Task Scheduler :
ffmpeg.exe -i rtsp ://user:pw@nestcam:554 -vf scale=1280:720 -vcodec libx264 -g 20 -r 10 -b:v 1120000 -crf 31 -map 0 -map -0:a -acodec aac -sc_threshold 0 -f hls -hls_time 2 -segment_time 2 -hls_flags delete_segments -hls_list_size 20 C :\webpages\video\stream.m3u8

  


  It works fine when I use hardware acceleration too, but only outside Task Scheduler (e.g. a command prompt) :
ffmpeg.exe -init_hw_device qsv=hw -filter_hw_device hw -i rtsp ://user:pw@nestcam:554 -vf hwupload=extra_hw_frames=64,format=qsv -c:v h264_qsv -g 20 -r 10 -b:v 1120000 -crf 31 -map 0 -map -0:a -acodec aac -sc_threshold 0 -f hls -hls_time 2 -segment_time 2 -hls_flags delete_segments -hls_list_size 20 C :\webpages\video\stream.m3u8

  


  The hardware accelerated version fails when executed by Windows Task Scheduler, whether started automatically or manually. The relevant output is as follows :
[AVHWDeviceContext @ 00000184ba5cc800] Failed to create Direct3D device
Device creation failed : -1313558101.
Failed to set value 'qsv=hw' for option 'init_hw_device' : Unknown error occurred
Error parsing global options : Unknown error occurred

  


  Why can't the ffmpeg task started by Task Scheduler see the hardware-accelerated hardware ? Any ideas on how to resolve this ?

  


  The hardware-accelerated version reduces the load on the CPU by about 75% (ie 50% down to 13%), so it's a significant benefit.

  


  Thanks

  


• Unable to compile ffmpeg to support NVIDIA hardware acceleration

  17 mars 2017, par user3847630

  I am trying to compile ffmpeg to support NVIDIA hardware acceleration. But I am getting the following errors :

  libavcodec/cuvid.c: In function ‘check_cu’:
  
  libavcodec/cuvid.c:83:5: error: implicit declaration of function ‘cuGetErrorName’ [-Werror=implicit-function-declaration]
  
       cuGetErrorName(err, &err_name);
  
       ^
  
  libavcodec/cuvid.c:84:5: error: implicit declaration of function ‘cuGetErrorString’ [-Werror=implicit-function-declaration]
  
       cuGetErrorString(err, &err_string);

  I have installed CUDA by following the instruction on NVIDIA Developer forum. The configuration I used is :

  ./configure --enable-nonfree --enable-nvenc --enable-cuda --enable-cuvid --enable-libx264 --enable-gpl

  The GPU on my laptop is NVIDIA Corporation GM108M [GeForce 840M].