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• FFmpeg convert single image into video Android

  15 mai 2014, par berserk

  I am trying to convert a single image into a video using FFmpeg. I have tried following the files :

  "ffmpeg  -analyzeduration 2147483647 -probesize 2147483647 -i " + packat.get(i).path +"-r 25 -t 1000 -y op.mp4"
  
  
  
  "ffmpeg -loop 1 -r 23.976 -i input.jpg -t 00:00:02 -vcodec qtrle -an output.mov"
  
  
  
  "ffmpeg -i c:\rawvideo\mask.bmp -loop 1 -r 29.97 -s 720x480
  
          -aspect 4:3 -t 00:04:05 -vcodec mjpeg -vb 11261600 -an
  
          c:\rawvideo\fullmask.avi"

  But all of them give me this annoying error :

   Can not process SOS before SOF, skipping marker parser used 0 bytes (0 bits) decode frame unused 0 bytes decoding for stream 0 failed 
  
  Could not find codec parameters for stream 0 (Video: mjpeg): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options /storage/sdcard0/cblVE/temp/0.jpg: could not find codec parameters 
  
  exit_program: 1 

  Please help. I have searched for a solution from a week, but I have found nothing.

• Firefox audio tag doubles length of OGG Vorbis

  22 mai 2014, par tomysshadow

  So, here I have a demo file from my website

  http://members.shaw.ca/darolynk/breakup/html5game/snd_music.ogg

  I am running off of Firefox Beta 30.0 and this issue does not persist in Google Chrome. In Firefox, when I play the file back, the length is displayed at around twice of its actual length as 32:13 when it is only 12:52 in length. Even worse, the audio stutters, playing one second of noise, one second of silence. This issue is not persistent in Chrome nor Opera. It is not a streaming issue (the song is streamed by the time it is played back in fact).

  I am wondering if this is an issue with the codec or with Firefox’s intrepretation of the codec, but more importantly, I want to know how to fix it. Some information about the file : the file is in OGG Vorbis format, 44100 Hz, 32 kbps Mono (yes, I am running out of storage space). It was encoded with SUPER, which in turn uses FFMpeg and MEncoder as necessary.

  This does not apply to all files of this format, making the issue even stranger. Are OGG Vorbis files over a certain length not allowed or interpreted differently by Firefox ? This must be the case for someone else and not just me...

  Any help is appreciated, thanks in advance !

• How to add text on a video using FFMPEG in android

  19 juin 2014, par Divya Motiwala

  I am trying to add text to the video but not getting the syntax right.
  I am forming the command as a string (given below) :

   String concatePath = "data/data/"+ this.getPackageName() +"/cache/ffmpeg" + " -y -i " +
  
                   Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)+"/Camera/wildlife.mp4 -vf " +
  
                   "drawtext=fontfile=/system/fonts/DroidSans.ttf\\: text='this' \\:x=(w-text_w)/2\\:y=H-60 \\:fontcolor=white \\:box=1 -y "
  
                   + Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC)+"/test/output_text.mp4";

  So the command that gets executed is :

  data/data/com.example.videomerger/cache/ffmpeg -y -i /storage/emulated/0/DCIM/Camera/wildlife.mp4 -vf drawtext=fontfile=/system/fonts/DroidSans.ttf\: text='this' \:x=(w-text_w)/2\:y=H-60 \:fontcolor=white \:box=1 -y /storage/emulated/0/Music/test/output_text.mp4

  It is giving the error :

  Unable to find a suitable output format for ’text=’this’’
  , text=’this’ : Invalid argument

  How to solve it ?

  Update : I could add text to the video but it takes only single words. When i give space for multi words, it considers it as an invalid argument ! How can i add space to it ?