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• Installing gifify on Windows

  12 octobre 2017, par Robert Wojciechowski

  So gifify is a pretty awesome script that converts videos to gifs via command line : https://github.com/vvo/gifify

  I’m keen to get this working on my Windows 10 machine. I’m pretty new to windows and relatively new to coding, but I was able to get a few things working, but ran into a problem.

  Here is what I did :

  1. Installed node.js + npm
  2. Installed FFmpeg using npm
  3. Installed ImageMagick using npm (i think i did this wrong, might have only installed the wrapper).
  4. Downloaded giflossy. It needed to be built (?)
  5. Installed Visual Studio 2015, tried to build it using nmake and got this error :

  NMAKE : fatal error U1073: don't know how to make 'win32cfg.h'

  The command I used was :

  PS C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin> .\nmake -f "C:\Users\Robert's Workstation\.npm-global\node_modules\giflossy-lossy-1.82.1\src\Makefile.w32"

  Would really appreciate some help with this :D

• What is legacyNullReferencePolicy ?

  22 février 2014, par Sugrue

  We are getting mysterious SEHExceptions in our C# application which may be coming from some unmanaged code (FFMPEG). Its not being caught by the try-catch blocks - so we are not certain what is causing it, but it is perhaps due to a null reference.

  I found this on MSDN (SEHException MSDN Page) which says :

  The .NET Framework often encounters unmanaged SEH exceptions that are automatically mapped to managed equivalents. There are two common unmanaged SEH exceptions :
  STATUS_NO_MEMORY exceptions are automatically mapped to the OutOfMemoryException class.
  STATUS_ACCESS_VIOLATION exceptions are automatically mapped as follows :

  If legacyNullReferencePolicy is applied, all access violations are mapped to the NullReferenceException class.

  Now, this bit sounds interesting - if we could set this legacyNullReferencePolicy maybe these mysterious NullReferenceExceptions could be caught and we could find out where they are coming from.

  But I can't find any information online about legacyNullReferencePolicy. What is it ? Where do I set it ?

• ERROR : Could not write header for output file #0 (incorrect codec parameters ?) : Invalid argument

  13 octobre 2019, par timofischerprojects

  I want to replace the audio stream in a Video-DVD. But I have problems with the replace of the audio stream.

  The DVD-VOB have 3 streams.
  Stream 0 is dvd_nav_packet.
  Stream 1 is the video.
  Stream 2 is the audio.

  I also tryed to change the exportinformation for ffmepg with -map 0:d and -map 0:d:1. Also with and without from the codec Infos -f vob -target ntsc-dvd -vcodec copy -acodec copy. And update ffmpeag/use older versions. But I only get error messages.

  ffmpeg is startet with a vb.net Programm which which decide which video need a new audio file.

  Can somebody tell me what I do wrong ?

  ffmpeg.exe -i "F:\VIDEO_TS\VTS_01_1.VOB" -i "%CD%\tfpat.mp2" -map 0:0 -map 0:1 -map 1:0 -f vob -target ntsc-dvd -vcodec copy -acodec copy "C:\Users\Timo\AppData\Local\Microsoft\Windows\Burn\Burn\VIDEO_TS\VTS_01_1.VOB"
  
  
  
  
  
  ffmpeg version N-88514-gd5995c531d Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7.2.0 (GCC)
  
    configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
  
    libavutil      56.  0.100 / 56.  0.100
  
    libavcodec     58.  1.100 / 58.  1.100
  
    libavformat    58.  0.102 / 58.  0.102
  
    libavdevice    58.  0.100 / 58.  0.100
  
    libavfilter     7.  0.101 /  7.  0.101
  
    libswscale      5.  0.101 /  5.  0.101
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100
  
  Input #0, mpeg, from 'F:\VIDEO_TS\VTS_01_1.VOB':
  
    Duration: 00:01:51.17, start: 0.300300, bitrate: 7273 kb/s
  
      Stream #0:0[0x1bf]: Data: dvd_nav_packet
  
      Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, progressive), 720x480 [SAR 32:27 DAR 16:9], 6800 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 320 kb/s
  
  [ac3 @ 037ee700] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, ac3, from 'D:\SkyDrive\Projekte\AtmosFX_Syncro_Projekt\AtmosFX-Translator\AlteVersionen\Version 2\tfpat.mp2':
  
    Duration: 00:01:51.26, start: 0.000000, bitrate: 320 kb/s
  
      Stream #1:0: Audio: ac3, 48000 Hz, stereo, fltp, 320 kb/s
  
  File 'C:\Users\Timo\AppData\Local\Microsoft\Windows\Burn\Burn\VIDEO_TS\VTS_01_1.VOB' already exists. Overwrite ? [y/N] y
  
  [dvd @ 037fbd20] Invalid media type data for output stream #0
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
    Stream #1:0 -> #0:2 (copy)
  
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