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How to split a MKV video to provide a smaller sample for testing


FrostByte

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FrostByte

Sometimes the developers will ask for a small sample of your media to test on their end in order to troubleshoot a problem.  If the file size is too large to upload somewhere, then you may want to provide a smaller portion of that video which still exhibits the reported error for testing.

MKVToolnix can input other extensions than MKV, but output will always be MKV and changing the extension may not produce the same issue.

1. Download and install MKVtoolnix

  • Click the link below if you don't already have MKVToolNix

MKVToolNix Downloads – Matroska tools for Linux/Unix and Windows

 

2. Open video with MKVToolNix

  • Start MKVToolNix
  • Drag-n-drop video file to the "File name" box

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3. Choose method to split video

  • Click the "Output" tab
  • Click the dropdown box next to "Splitting" and choose to split by output size or duration depending on what you think will get the developers just enough video to troubleshoot your problem.

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4. Enter size or duration and max number of files before starting

  • place mouse over the size or duration box to see a popup for format of options.  Ex: 00:05:00 for 5 minutes
  • Set max files to 2. You only need the first file so you can abort after the second file starts to be created if you want.
  • Click "Start multiplexing"

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5. Test your sample file

  • Add your sample which you just split to an Emby library and test it before submitting.  Ex: Hancock (2008) - Theatrical Cut (4K) (1)-001.mkv
  • It's very possible that remuxing while splitting your file fixed the problem and then sending your sample won't help.  If your sample plays good, then try just remuxing the original file and testing that.  Remuxing sometimes fixes problems with bad headers, etc.

6. Upload the sample to a cloud server

  • If your sample still exhibits the original problem, then upload your file to a cloud share such as Google Drive or Dropbox. 
  • Send a PM to the developers with a shared link to your file and a link to your post in the forum so they know what issue the file is for.
Edited by FrostByte
Added testing of sample before submitting
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