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• Could not open codec 'libopenh264' : Unspecified error

  13 mars 2017, par Gingerbread

  I am using OpenCV to process videos for my research. I have Python 2.7 and OpenCV 3.2 versions installed on Windows 10. When I do background subtraction on a video in Python using OpenCV, it works fine and produces the output. However, when I try to save the background subtracted video, it throws this error :

  warning: Error opening file (/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:779)
  
  warning: MAH00119.avi (/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:780)
  
  OpenCV: FFMPEG: tag 0x34363258/'X264' is not supported with codec id 28 and format 'h264 / raw H.264 video'
  
  
  
  Failed to load OpenH264 library: openh264-1.6.0-win64msvc.dll
  
      Please check environment and/or download library: https://github.com/cisco/openh264/releases
  
  
  
  [libopenh264 @ 0000000001f5bf60] Incorrect library version loaded
  
  Could not open codec 'libopenh264': Unspecified error

  I am processing MP4 videos. And I followed the instructions carefully while installing ffmpeg, like adding the bin’s path to environment variables. I don’t know what else to do. Stuck on this for three days now.

  Any help would be much appreciated !
  Thanks in advance !!

• How can I make ffmpeg open my raw video file ?

  5 février 2017, par Mandy Weiss

  I’m trying to convert a raw video-only file to some other formats but all I’m getting ffmpeg to produce is a black video.
  There are no error messages displayed and this is what ffprobe shows when analyzing the file :

  ffprobe version 3.2.2 Copyright (c) 2007-2016 the FFmpeg developers
  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
  configuration : —prefix=/usr/local/Cellar/ffmpeg/3.2.2 —enable-shared
  —enable-pthreads —enable-gpl —enable-version3 —enable-hardcoded-tables —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-libmp3lame —enable-libx264 —enable-libxvid —enable-opencl —disable-lzma —enable-vda libavutil 55. 34.100 / 55. 34.100 libavcodec 57. 64.101 /
  57. 64.101 libavformat 57. 56.100 / 57. 56.100 libavdevice 57. 1.100 / 57. 1.100 libavfilter 6. 65.100 / 6. 65.100 libavresample 3. 1. 0 / 3. 1. 0 libswscale 4. 2.100 /
  4. 2.100 libswresample 2. 3.100 / 2. 3.100 libpostproc 54. 1.100 / 54. 1.100 Input #0, avi, from ’1.avi’ : Metadata :
  encoder : Lavf54.20.4 Duration : 00:00:57.43, start : 0.000000, bitrate : 83196 kb/s
  Stream #0:0 : Video : rawvideo, pal8, 720x480, 83238 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc

  Other input files can be transcoded to a playable outfile file with the same ffmpeg convert command :

  ffmpeg -i 1.avi -vcodec h264 output.avi

  I know the input video is not corrupted because VLC plays it successfully and can even convert it to other formats, but I want to preserve the original one when trying different configurations using ffmpeg.

  Thanks in advance for helping !

• How to open MIL avi video fiile

  12 février 2017, par ahme0307

  I have some (AVI) videos with MIL(Matrox Imaging Library) codec. I have tried multiple codecs but i am not able to open.
  I have tried VLC, K-lite codecs,ffmpeg, here is the log file from k-Lite

  >##LAV Splitter Source (internal)::Video
  
  >
  
  >Media Type 0:
  
  >--------------------------
  
  >Video: MIL  256x256 5fps 489kbps
  
  >AM_MEDIA_TYPE: 
  
  >majortype: MEDIATYPE_Video {73646976-0000-0010-8000-00AA00389B71}
  
  >subtype: Unknown GUID Name {204C494D-0000-0010-8000-00AA00389B71}
  
  >formattype: FORMAT_VideoInfo {05589F80-C356-11CE-BF01-00AA0055595A}
  
  >bFixedSizeSamples: 0
  
  >bTemporalCompression: 1
  
  >lSampleSize: 1
  
  >cbFormat: 128
  
  >
  
  >VIDEOINFOHEADER:
  
  >rcSource: (0,0)-(256,256)
  
  >rcTarget: (0,0)-(256,256)
  
  >dwBitRate: 489508
  
  >dwBitErrorRate: 0
  
  >AvgTimePerFrame: 2000000
  
  >
  
  >BITMAPINFOHEADER:
  
  >biSize: 80
  
  >biWidth: 256
  
  >biHeight: 256
  
  >biPlanes: 1
  
  >biBitCount: 24
  
  >biCompression: MIL 
  
  >biSizeImage: 196608
  
  >biXPelsPerMeter: 0
  
  >biYPelsPerMeter: 0
  
  >biClrUsed: 0
  
  >biClrImportant: 0
  
  >
  
  >pbFormat:
  
  >
  
  >

  I also tried ffplay and here is the output
  

  The only software i came across that can open this video is from Matrox and it doesn’t allow exporting to other formats
  
  I appreciate if some one can direct me to codecs that can handle this videos. I would like convert to other video formats for further processing.