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• Convert form 30 to 60fps by increasing speed, not duplicating frames. FFmpeg

  14 janvier 2014, par Matt Pellegrini

  I have a video that is incorrectly labelled at 30fps, it is actually 60fps and so looks like it's being played at half speed. The audio is fine, that is, the soundtrack finishes half way through the video clip. I'd like to know how, if possible to fix this, that is double the video speed, making it 60fps and meaning that the audio and video are synced.

  The file is H.264 and the audio MPEG-4 AAC

  Thanks in advance for any help,

  Matt

  File details as given by ffmpeg, as requested :

  ffmpeg version 0.8.9-6:0.8.9-0ubuntu0.13.10.1, Copyright (c) 2000-2013 the Libav developers
  
  built on Nov  9 2013 19:09:46 with gcc 4.8.1
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './Tignes60fps.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2014-01-13 02:23:09
  
      Duration: 00:08:33.21, start: 0.000000, bitrate: 5690 kb/s
  
      Stream #0.0(eng): Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 5609 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
  
  Metadata:
  
      creation_time   : 2014-01-13 02:23:09
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 156 kb/s
  
  Metadata:
  
        creation_time   : 2014-01-13 02:23:09
  
  At least one output file must be specified

• Fluent-ffmpeg "not a suitable output format"

  5 septembre 2015, par J4G

  I’m using the fluent-ffmpeg module for Node.js to convert audio files. I have a .mp3 file that I’d like to convert to .wma

  Here’s what that looks like :

  var proc = new ffmpeg({
  
     source: 'file.mp3',
  
     nolog: false
  
  }).toFormat('wma')                                                
  
    .saveToFile('file.wma', function(stdout, stderr)
  
  {                                                 
  
      console.log(stderr);
  
  });

  Unfortunately, I get the error :

  Requested output format 'wma' is not a suitable output format

  This is the entire error log :

  ffmpeg version 0.8.9-4:0.8.9-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  
    built on Nov  9 2013 19:25:10 with gcc 4.6.3
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  Input #0, mp3, from 'song_downloads/You Suffer.mp3':
  
    Metadata:
  
      title           : You Suffer
  
      artist          : Napalm Death
  
      album           : Scum
  
      genre           : Death Metal
  
      track           : 12
  
      date            : 1987
  
    Duration: 00:00:04.98, start: 0.000000, bitrate: 381 kb/s
  
      Stream #0.0: Audio: mp3, 44100 Hz, stereo, s16, 193 kb/s
  
  Requested output format 'wma' is not a suitable output format

  I know this isn’t an ffmpeg issue because

  ffmpeg -i file.mp3 file.wma

  Works fine. Any ideas ?

• vp9/x86 : idct_add_16x16_ssse3.

  14 décembre 2013, par Ronald S. Bultje

  vp9/x86 : idct_add_16x16_ssse3.
  Currently only dc-only and full 16x16. Other subforms will follow in the
  
  near future. Total decoding time of ped1080p.webm goes from 9.7 to 9.3
  
  seconds. DC-only goes from 957 -> 131 cycles, and the full IDCT goes
  
  from 4050 to 745 cycles.
  

  • [DH] libavcodec/x86/vp9dsp_init.c
  • [DH] libavcodec/x86/vp9itxfm.asm