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• Output FFMPEG segments to GCS

  28 janvier 2019, par Terrabyte

  Im trying to output an ffmpeg hls stream to google cloud storage after each segment is created or at least after the entire encoding is done. Doesn anyone know how to accomplish this ?

  This is what i have in my bash script :

  $FFMPEG -hide_banner -i "$infile" \
  
      $PASSVAR \
  
      -y \
  
      -codec:v "$VIDEO_CODEC" \
  
      -codec:a "$AUDIO_CODEC" \
  
      -threads "$NUMTHREADS" \
  
      -map 0:v \
  
      -map 0:a \
  
      -flags \
  
      -global_header \
  
      -f segment \
  
      -segment_list "$playlist_name" \
  
      -segment_time "$SEGLENGTH" \
  
      -segment_format mpeg_ts \
  
      -g "$key_frames_interval" \
  
      -keyint_min "$key_frames_interval" \
  
      $resolution \
  
      $bitrate \
  
      $FFMPEG_ADDITIONAL \
  
      $FFMPEG_FLAGS \
  
      "$OUTPUT_DIRECTORY/$output_name" | gsutil -m mv "$OUTPUT_DIRECTORY/$output_name" gs://bucket-vod-example
  
  }

  does anyone know how to output the files to gsutls as it’s being encoded ? I can make the output the mounted storage point of google cloud storage but encoding directly to it is extremely slow so if possible is there way to encode locally then transfer as it’s being encoded ?

• How OpenGL directly manipulates data on GPU that a video hardware decoded by FFmpeg CUDA

  24 janvier 2019, par gn cavalry

  Ubuntu 18.04
  FFmpeg 4.1
  CUDA 10.0

  What I want to do is using FFmpeg CUDA decode a video, directly peocess data on GPU by GLSL , then encode data using FFmpeg CUDA. Like this :

  Raw Video —> FFmpeg CUDA decoder —> GLSL —> FFmpeg CUDA encoder —> New Video

  Here is the short code :

  ret = avcodec_send_packet(decoder_ctx, pkt);
  
  while (ret >= 0) {
  
      ret = avcodec_receive_frame(decoder_ctx, frame);
  
  
  
      /**
  
       * Now CUDA decoded data is stored on GPU and referenced by frame
  
       * How can GLSL manipulate decoded data on GPU directly, 
  
       * without transfer it to CPU and load to GPU again by glTexImage2D()
  
       */
  
  
  
  
  
      // I don't if the following code is right, if GLSL processed data is still referenced by frame
  
      while (avcodec_send_frame(encoder_ctx, frame)) {
  
          avcodec_receive_packet(encoder_ctx, &enc_pkt);
  
      }
  
  }

  Can anyone help me ? Thanks very much !

• ffmpeg output doesn't play on multiple devices

  22 janvier 2019, par jchaykow

  I have read the other stackoverflow posts regarding this topic so I am fairly certain this is not exact duplicate.

  ffmpeg exports a video that seems to only play on select players. I want to export a video that plays on iphone/mac/general players. I have seen the suggestions for the -pix_fmt yuv420p tag but this does not seem to work anymore - I read that Mac has since changed their systems that makes it not compatible anymore.

  I am running :

  ffmpeg -start_number 1 -framerate 4 -pix_fmt yuv420p -i screen%01d.png output.mp4

  This all works fine and I can see the video by doing :

  ffplay output.mp4

  But I would like to be able to transfer this to mobile or general playback, any way to do this, ideally using ffmpeg ? I’d rather not use two tools to do 1 job.

  ---

  • Works on gmail
  • Doesn’t work on QuickTime Player
  • Doesn’t work on Flip Player
  • Doesn’t work on iPhone