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[Bug 1682323] Re: High FPS exported video is black if video includes fading

 

** Description changed:

  When exporting at 50 fps or higher at any resolution using h.264 or
  mpeg4 (any container) and at any quality, the video file is always black
  if the edited video contains fading at the start and/or end.
  
  The exported video only displays properly at 30 fps or less.
  
  The bad 'black' exported video file is quite small (e.g. 283.3 kb) as
  opposed to a 'working' export at 30 fps (e.g. 17.0 MB).
  
  No errors are shown during the export.
  
  The original (imported) video file is 1080p60 h.264.
  
  I have tried playing the exported video back using the Ubuntu 'Videos'
  app, VLC 2.2.2, Handbrake 1.0.4 and Xine 0.99.9-1.2. All show the same
  result.
  
  OS: Ubuntu 16.04 64bit
  Openshot ver. 2.3.1 (installed via PPA)
  FFmpeg (libavcodec) ver. 7:2.8.11-0ubuntu0
  Melt ver. 6.0.0-2
+ 
+ NOTE: This process works as it should in Openshot ver. 1.4.3, but not in
+ the newer version 2.3.1.

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https://bugs.launchpad.net/bugs/1682323

Title:
  High FPS exported video is black if video includes fading

Status in OpenShot Video Editor:
  New

Bug description:
  When exporting at 50 fps or higher at any resolution using h.264 or
  mpeg4 (any container) and at any quality, the video file is always
  black if the edited video contains fading at the start and/or end.

  The exported video only displays properly at 30 fps or less.

  The bad 'black' exported video file is quite small (e.g. 283.3 kb) as
  opposed to a 'working' export at 30 fps (e.g. 17.0 MB).

  No errors are shown during the export.

  The original (imported) video file is 1080p60 h.264.

  I have tried playing the exported video back using the Ubuntu 'Videos'
  app, VLC 2.2.2, Handbrake 1.0.4 and Xine 0.99.9-1.2. All show the same
  result.

  OS: Ubuntu 16.04 64bit
  Openshot ver. 2.3.1 (installed via PPA)
  FFmpeg (libavcodec) ver. 7:2.8.11-0ubuntu0
  Melt ver. 6.0.0-2

  NOTE: This process works as it should in Openshot ver. 1.4.3, but not
  in the newer version 2.3.1.

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References