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• ffmpeg - produces corrupted file

  1er mai 2015, par pomegranate

  I have a mp4 file that I need to convert to avi to run a matlab script on. This script strips the file of any audio, so then I have to merge it back with the audio and then reconvert the avi to mp4. I’m doing this in a number of steps, and am uncertain at which point I’m screwing the commands up... basically, the final mp4 file I create it corrupted and cannot be played in quicktime (though it does work in VLC).

  Here are the steps I am taking :

  1) ffmpeg -i original.mp4 -acodec copy -vcodec copy original.avi
  
     This converts mp4 to avi.
  
  2) ffmpeg -i original.mp4 -acodec copy original.aac
  
     This gets the audio from the mp4.
  
  3) Run matlab script, which produces new-no-sound.avi
  
  4) ffmpeg -i new-no-sound.avi -i original.aac -c:v copy -c:a aac -strict experimental new-with-sound.avi
  
     This merges the old audio with the new avi file
  
  5) ffmpeg -i new-no-sound.avi -c:v libx264 -crf 19 -preset slow -c:a libfaac -b:a 192k -ac 2 final-version.mp4
  
     This converts the new merged file to mp4.

  Here’s the ffmpeg -i from the original.mp4 :

    Metadata:
  
  major_brand     : isom
  
  minor_version   : 512
  
  compatible_brands: isomiso2mp41
  
  encoder         : Lavf54.29.104
  
  Duration: 00:00:01.77, start: 0.000000, bitrate: 9920 kb/s
  
  Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 9978 kb/s, 59.94 fps, 59.94 tbr, 2997 tbn, 2997 tbc (default)
  
  Metadata:
  
    handler_name    : VideoHandler
  
  Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 52 kb/s (default)
  
  Metadata:
  
    handler_name    : SoundHandler

  And here is it for new-no-sound.avi :

  Input #0, avi, from 'new-no-sound.avi':
  
  Duration: 00:00:02.12, start: 0.000000, bitrate: 1325789 kb/s
  
  Stream #0:0: Video: rawvideo, bgr24, 1280x720, 1336298 kb/s, 59.94 fps, 59.94 tbr, 59.94 tbn, 59.94 tbc

  Finally, here it is for final-version.mp4

  Metadata:
  
  major_brand     : isom
  
  minor_version   : 512
  
  compatible_brands: isomiso2avc1mp41
  
  encoder         : Lavf55.48.100
  
  Duration: 00:00:02.21, start: 0.023220, bitrate: 2117 kb/s
  
  Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 1280x720, 2108 kb/s, 59.94 fps, 59.94 tbr, 11988 tbn, 119.88 tbc (default)
  
  Metadata:
  
    handler_name    : VideoHandler
  
  Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 43 kb/s (default)
  
  Metadata:
  
    handler_name    : SoundHandler

  Any advice for where I might be going wrong ?

• Révision 19837 : Correction et amélioration dans l’importation d’une sauvegarde :

  24 août 2012, par esj@rezo.net

  le test final de nécessité de reconnexion était faux, le résultat de auth_retrouve_login n’étant pas un tableau ; corrigé, ce test apparaît peu utile car l’étape finale étant provoquée par une redirection, il y a eu à l’entrée une vérification du cookie qui a provoqué un renouvellement de session qui a (...)

• merge multiple ffmpeg commands into one line to make the whole process faster

  8 septembre 2020, par user1hjgjhgjhggjhg

  I want to merge multiple commands into one so that whole processing time would be fastest. What I am doing so far is

  


  


  1. A video file is uploaded from a webform and and server upload into a temp directory.

     


      if (move_uploaded_file($_FILES[$param]['tmp_name'], $filePath)) {


       return $filePath;
     }


     


  


  2. add black borders around the video(through ffmpeg command) - video uploads again to a directory

     


     $command_new = "ffmpeg -i $filePath -vf 'scale=720:1280:force_original_aspect_ratio=decrease,pad=720:1280:(ow-iw)/2:(oh-ih)/2,setsar=1' $video_file";
    exec($command_new);


     


  


  3. optimizing the video(ffmpeg command) - video uploads again to a directory

     


       $cmd_new = "ffmpeg -i $video_file -c:v libx264 -crf 28 $optimizeResultFile";


     


  


  4. merging the uploaded file with the existing video file present in the database into one and uploading that file into directory(through ffmpeg command)

     


            $command_new = "ffmpeg -i $optimizeResultFile   -i $second_video_path   -filter_complex '[0:v]pad=iw*2:ih[int];[int][1:v]overlay=W/2:0[vid]'   -map [vid]   -c:v libx264   -crf 23   -preset veryfast $videomerge";


     


  


  5. //add custom sound in that final merged video

     


            $cmd_new = "ffmpeg -i $videomerge -i $audio -c:v copy -c:a aac -shortest -map 0:v:0 -map 1:a:0 $with_new_audio";


     


  


  


  Is it possible to do all at one command and not in multiple commands. This process takes 1 min to upload a final file. want to make it faster