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• cafenc : fill in avg. packet size later if unknown

  10 juillet 2021, par Roman Beranek

  cafenc : fill in avg. packet size later if unknown
  Frame size of Opus stream was previously presumed here to be 960 samples
  
  (20ms), however sizes of 120, 240, 480, 1920, and 2880 are also allowed.
  
  It can also alter on a per-packet basis and even multiple frames may be
  
  present in a single packet according to the specification, for the sake
  
  of simplicity however, let us assume that this doesn't occur.
  Because the mFramesPerPacket field, representing the number of samples
  
  per packet in the ffmpeg terminilogy, is the key factor in calculating
  
  packet durations and all that follows from that (index, bitrate, ...),
  
  it is crucial to get right.
  Therefore, if the packet size is not available ahead of time (as it is in
  
  the case of Opus), calculate an average from the stream duration once we
  
  know how many packets there are and update the filed in the header.
  

  • [DH] libavformat/cafenc.c

• ffmpeg player in discord.py (python) automatically leave

  25 octobre 2018, par Rastasplif

  I have created a discord bot that on certain messages either sends back a message or plays a sound (like a soundboard)

  The crucial line of code is :

           soundboard_player = voice_client.create_ffmpeg_player("doh.mp3")
  
           soundboard_player.start()
  
           await client.send_message(message.channel, "Playing DOH...")

  This works absolutely fine but i kept trying to add the line
  after=voice_client.disconnect()
  I put this inside the ("doh.mp3", * I PUT IT HERE *) brackets.
  I wanted the bot to leave after it was done.

  When I run the code with the ’after’ statement included, the bot joins and I get the error message :

  TypeError: disconnect() takes 1 positional argument but 2 were given

  I know you can use soundboard_player.is_done() to check the status of the bot but I couldn’t figure out a way to check the status without trapping the code in a loop

  By trapping the code in the loop I cant execute a STOP command to stop it playing the song (soundbite) half way through.

  Any help with the after=voice_client.disconnect() command for the ffmpeg player
  or a creative way to periodically check the status without getting trapped in the loop ?

• ffmpeg resize video then over lay on top of image using nvidia cuda

  16 mars 2021, par user72261

  i have a bunch of old family videos that are 4:3 SD format i am looking to change them to 16:9 and over lay the video on top of a 720p background

  


  i can do this fine using standard ffmpeg and everything works but it takes for ever with over 10 years of videos to convert

  


  i have a desktop pc i use for work with 2070 super installed so i was looking to use that to speed it up a little i tried adding cuda hardware support and i just hit errors

  


  ffmpeg -y -vsync 0 -hwaccel cuda -hwaccel_output_format cuda -loop 1 -i image.jpg -i video.mp4 -filter_complex "[1]hwupload_cuda,scale=1280:720:force_original_aspect_ratio=decrease[inner];[0][inner]overlay_cuda=x=10:y=10:shortest=1[out]" -map "[out]" -map 1:a -c:a aac -map 0:v -c:v  h264_nvenc -b:v 5M -y output.mp4


  


  the errors i keep getting are

  


  decoder->cvdl->cuvidDecodePicture(decoder->decoder, &ctx->pic_params) failed -> CUDA_ERROR_INVALID_IMAGE: device kernel image is invalid