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• How to concat two/many mp4 files(Mac OS X Lion 10.7.5) with different resolution, bit rate [on hold]

  3 septembre 2013, par praveen

  I have to concat different mp4 files into single mp4 file. i am using following ffmpeg command but this command is only working if both file is same(copy, or if all video property is same(codec, resolution,bitrate....) ) other wise result is unexpected video. (I am working on Mac OS X Lion 10.7.5)

  ffmpeg commad :

  ffmpeg -i images/1/output.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
  
  ffmpeg -i images/1/Video2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
  
  ffmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c copy -bsf:a aac_adtstoasc output2.mp4

  console output :

  [mpegts @ 0x7f8c6c03d800] max_analyze_duration 5000000 reached at 5000000 microseconds
  
  
  
  Input #0, mpegts, from 'concat:intermediate1.ts|intermediate2.ts':
  
  Duration: 00:00:16.52, start: 1.400000, bitrate: 1342 kb/s
  
  Program 1 
  
  Metadata:
  
  service_name    : Service01
  
  service_provider: FFmpeg
  
  Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 1024x768 [SAR   1:1 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
  Stream #0:1[0x101](und): Audio: aac ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 101 kb/s
  
  
  
  
  
  
  
  Output #0, mp4, to 'output2.mp4':
  
  Metadata:
  
  encoder         : Lavf54.63.104
  
  Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1024x768 [SAR 1:1 DAR 4:3],      q=2-31, 25 fps, 90k tbn, 90k tbc
  
  Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, 101 kb/s
  
   Stream mapping:
  
  Stream #0:0 -> #0:0 (copy)
  
  Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
   frame=  586 fps=0.0 q=-1.0 Lsize=    2449kB time=00:00:20.11 bitrate= 997.4kbits/s    
  
   video:2210kB audio:225kB subtitle:0 global headers:0kB muxing overhead 0.578335%

  Please help

• Renaming Carrierwave extension before saving it [on hold]

  2 septembre 2013, par Jan

  I am trying to get a mp3 version of a wav which gets watermarked by using ffmpeg.

  Spoken in steps :

  • upload wav (works)
  • watermark it (works also)
  • make a mp3 version (does not work)

  The upload and watermarking step is done correctly.

  My problem is, that ffmpeg evaluates the destination format by reading its file extension name (which is wav in my case). How can I rename the extension before it get's saved ?

  ffmpeg -i watermarked.wav -acodec libmp3lame -f mp3 watermarked.wav
  
                       HOW CAN I RENAME THIS BEFORE IT GET SAVED? ^^^

  The above snip (-f forcing the codec and format) does NOT it's job and

  def full_filename(for_file=file)
  
    super.chomp(File.extname(super)) + '.mp3'
  
  end 

  is happening too late (after processing)

  Do I have to make a seperate (second) tempfile and remove the watermarked.wav ?
  Or do I have to make a "seperate process" and take ?
  And when yes, how ?

  I am trying this since weeks...

  many, many, many thanks in advance

• ffmpeg - convert JPG to video [on hold]

  8 mars 2014, par Ashish

  I need to convert 5 jpg files to a single video.
  I need to use ffmpeg.exe for that.

  Please help me out to find the correct command.

  My requirement is as follows :

  There are 5 jpg files in this folder.
  Each jpg should be displayed for 5 seconds, making it a 25 seconds video.

  Thanks in Advance.