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• how to choose ffmpeg video mp3 audio version id ?

  7 juin 2013, par Ulterior

  I am having issues on ffmpeg encoded video files audio tracks. My encoded video contains ID for audio track as extracted from mediainfo :

  I use CODEC_ID_MP3 in guess_format "mov" container for quicktime

  Audio
  
  ID                                       : 2
  
  Format                                   : MPEG Audio
  
  Format version                           : Version 2
  
  Format profile                           : Layer 3
  
  Codec ID                                 : .mp3
  
  Duration                                 : 2s 916ms
  
  Bit rate mode                            : Constant
  
  Bit rate                                 : 128 Kbps
  
  Channel(s)                               : 1 channel
  
  Sampling rate                            : 16.0 KHz
  
  Compression mode                         : Lossy
  
  Stream size                              : 45.3 KiB (2%)
  
  Language                                 : English

  This is not recognized on a vanilla codecless installation of windows 7, only played by k-lite codec libmad

  I have noticed, that another test file contains similar mp3 track and is played by media player OK :

  Audio
  
  ID                                       : 2
  
  Format                                   : MPEG Audio
  
  Format version                           : Version 1
  
  Format profile                           : Layer 3
  
  Mode                                     : Joint stereo
  
  Mode extension                           : MS Stereo
  
  Codec ID                                 : 6B
  
  Duration                                 : 1mn 9s
  
  Bit rate mode                            : Constant
  
  Bit rate                                 : 320 Kbps
  
  Channel(s)                               : 2 channels
  
  Sampling rate                            : 44.1 KHz
  
  Compression mode                         : Lossy
  
  Stream size                              : 2.67 MiB (38%)
  
  Writing library                          : LAME3.98

  The difference I noticed is in Format version number and Codec ID, which is Version 2 from ffmpeg output - I couldnt locate this version setting in ffmpeg source files, so my question is - is there a way to influence this format version identificator and set the codec id as in above playable video ?

• Open DivX/XVID videos in OpenCV Python

  16 avril 2014, par b_m

  I started working on a new computer a tried to set everything as it used to be on my old one. Unfortunately switching to 64bit Windows made everything quite difficult.

  With the current setup I can only open raw I420 videos converted with memcoder, but I can't open DivX/XVID videos, that I used to on my old PC. I tried ffdshow and K-Lite codec pack. Opening the videos in gspot shows that the codecs are indeed installed.

  I've searched for solution all over the Internet, but I couldn't find the solution. I've tried copying the ffmpeg dll into the Python27 folder.

  The environment is 64bits Windows 7 Pro

  EDIT :

  I tried saving a video using OpenCV :

  I passed -1 to the cv2.VideoWriter function to get the codec selection dialog. The dialog dosn't show the ffdshow codecs.

• DirectShow / x264 / AviSynth and Windows Server 2008 SP2

  15 novembre 2011, par Tim

  I'm having a hard time getting AviSynth to open video files on Windows Server 2008 SP2 (32 bit). I'm aware of the sound card issue, right now I'm using Audio=false. I've tried installing the below, but I always get the error "No combination of filters could be found to render the stream". I'm using DirectShowSource, but I don't have to ... I'm open that can open most formats your average Windows 7 machine can handle.

  I've installed :

  • "Desktop Extensions" - which installed Media Player and codecs
  • haali media splitter and ffdshow
  • Windows Media Services (for streaming, this supposedly had the mpeg codecs, but it doesn't) Windows Essentials Media Codec Pack
  • K-Lite Codec Pack Full VLC
  • QuickTime Tried copying mpeg.dll codecs from 32 bit Windows 7 to Server and regsvr32'ing them, but get error
  • Tried copying *.AX filters from 32 bit Windows 7 to server and regsvr32'ing, but still get AVS error

  AVS Script :

  • video0 = DirectShowSource("video0.avi", fps=30, pixel_type="RGB24", Audio=false)
  • video1 = DirectShowSource("video1.avi", fps=30, pixel_type="RGB24", Audio=false)
  • Dissolve(video0, video1, 30)

  Command Line :

  • x264 test.avs -o test.mp4 —bframes 3 —ref 3 —vbv-maxrate 2500 —vbv-bufsize=25000 —level 40 —threads

  AVS Error :

  • avs [error] : "No combination of filters could be found to render the stream"

  Has anyone gotten this working on Windows Server ? If so what filters codecs or other setup do I need ?

  Thank you for the time.