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• How to use my FFMPEG code in Automator (Mac)

  23 juin 2023, par 3EK

  I have an ffmpeg code that converts .mov files to .mp4 files. I would like to set up a 'watch folder' system on my mac, so that when I drop files into a specific folder, it will automatically convert the file using my FFMPEG code.

  


  I have tried to add my FFMPEG code into the Automator app (mac) as a shell script, but it did not work and gave me the error *"The action “Run Shell Script” encountered an error : “zsh:3 : no matches found : .mov”"

  


  The FFMPEG code that I am using is...

  


  for i in *.mov; do ffmpeg -ss 4 -i "$i" -c:v libx264 -preset ultrafast -b:v 20M -vf format=yuv420p -c:a aac "mp4/${i%.*}.mp4"; done;


  


  Is anyone able to help me work out why this is not working please ?

  


  Greatly appreciated !

  


  Best,
John

  


• avcodec_encode_audio2 failing with error code -22 in C++ FFMPEG

  16 juin 2014, par Godspped

  I have the following code to encode an audio stream and everything seems to be working fine until I get to the avcodec_encode_audio2 function, I am failing with -22 error code, and I dont know what that error code means. I verified that pFrame and out_fmt_ctx are allocated. Does anyone have an idea of what the problem might be ?

  Thanks in advance !

  while( res = av_read_frame( pFormatCtx, &packet ) >=0 )
  
  {
  
     if ( packet.stream_index == audioStream )
  
     {
  
    avcodec_get_frame_defaults(pFrame);
  
        ret = avcodec_decode_audio4(dec_ctx, pFrame, &got_frame, &packet);
  
  
  
        if (ret < 0) 
  
        {
  
       return ret;
  
    }
  
  
  
        /* Set frame pts */
  
        pFrame->pts = av_frame_get_best_effort_timestamp(pFrame);
  
  
  
        if (got_frame) 
  
        {
  
  
  
           AVPacket audioEncodedPacket;
  
           av_init_packet(&audioEncodedPacket);
  
  
  
  
  
           ret = avcodec_encode_audio2(out_fmt_ctx->streams[0]->codec, 
  
                                       &audioEncodedPacket, 
  
                                       pFrame, &got_packet);
  
  
  
           if ( ret < 0 )
  
           {
  
              //THIS IS WHERE I AM GOING WITH ERROR -22
  
           }
  
        }
  
   ...... // more code
  
   }

• Request aid to translate from an old avconv code to ffmpeg

  27 septembre 2022, par Azankiew

  I am working on an old script which uses avconv to manipulate some videos. I wanted to ask help to convert the following code into ffmpeg as I aknowledged avconv is not supported anymore.

  


  The code is :

  


  subprocess.call('avconv -i %s -an -filter_complex "select=between(n\,%s\,%s),setpts=PTS-STARTPTS, crop=%s:%s:%s:%s, scale=-2:224" %s'%(
            input_video_folder+clip.video_name,
            clip.start_frame,
            clip.end_frame,
            crop_width,
            crop_height,
            crop_left_distance,
            crop_top_distance,
            video),
                        shell=True)