How to Repair Damaged MKV Video File In some cases, an MKV video file may be corrupted and you will have to consider repairing it. Read the article to learn the causes for MKV video corruption and how to repair damaged MKV video. Both MKVExtractGUI-2 and MKVToolNix are freeware, download it respectively to your computer. First, install MKVToolNix and then put MKVExtractGUI-2.exe to the MKVToolNix folder, after that, double-click MKVExtractGUI-2 to run it. Step 2: Select MKV subtitle track. Click the button to open your MKV video with subtitles.
This tutorial will show you step by step how to merge SRT or SUB and IDX subtitle files with an MKV video file permanently.
MKVToolNix is the standard suite of programs for creating and working with Matroska and WebM files, a modern container format for modern audio, video and subtitle content. Created Jan 15, 2018. Top posts december 12th 2019 Top posts of december, 2019 Top posts 2019. How to merge subtitles with an MKV video using MKVToolNix MKVToolNix is a set of free tools to create, split, edit, mux, demux, merge, extract, and inspect MKV video files. It's available for Microsoft Windows, Linux, and macOS.
You can also merge multiple subtitle files with an MKV video file.
How to merge subtitles with an MKV video using MKVToolNix
MKVToolNix is a set of free tools to create, split, edit, mux, demux, merge, extract, and inspect MKV video files.
It's available for Microsoft Windows, Linux, and macOS.
You can install this tool on your computer, or you can use the portable version.
You can download MKVToolNix here (official website).
The steps below will show you how to permanently embed (hardcode) the subtitles into an MKV video file.
1. Make sure that the subtitle file is in the same folder as the MKV video file.
2. Make sure that the subtitle file has the same filename as the MKV video file.
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Example:
- Movie.mkv
- Movie.srt
- Movie.sub
- Movie.idx
3. Open MKVToolNix.
4. Click on the + Add source files button located at the bottom.
A “Add media files” window will appear.
5. Within this window, you go to the location on your computer where the MKV video and subtitle file(s) are.
6. Select the MKV video file and subtitle file(s) (.srt, .sub or .idx).
7. Click on the Open button.
8. In the Destination file section (located at the bottom), you can see and change the location on your computer where MKVToolNix will save the new MKV video file.
You can change the location by clicking on the (folder) button located next to the “Destination file” field.
9. When you're ready, you click on the Start multiplexing button at the bottom.
MKVToolNix will now merge the SRT or SUB and IDX subtitles with the MKV video file.
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I streamed a few DJ sets over the last few weeks with a bunch of friends as part of ‘covidcore’, an online get-together while we’re all in isolation. It’s been a while since I’ve played any DJ sets but it was great fun and thankfully I didn’t make too many mistakes.
Anyway, It was my first streaming experience and I found it a breeze to set up thanks to Twitch and OBS. When reviewing my recordings I noticed that my microphone level was pretty low so I decided to bust out the audio track from the video and raise it. Also when uploading my video to Youtube I also got a copyright notice about one the clips in my video which was subsequently being blocked, so I decided to edit that out too.
Here is how you can do it.
Note: I’m on a mac so all of the instructions are for that, but apart from installation the rest should be platform agnostic.
Steps
- Install mkvtoolnix
- Extract audio and video tracks from mkv file
- Optionally convert audio track if editing needed
- Merge audio and video tracks back in to mkv file
Install mkvtoolnix
mkvtoolnix is a set of command line programs for finding out information and modifying mkv (“Matroska”) files. You can install it with a GUI but I didn’t bother.
That’s it, boom!
Extract audio and video tracks from mkv file
For this step we are going to run this command
In the above command we are using mkvextract, part of mkvtoolnix, to extract the video track which is encoded using the ‘h264’ codec and also the audio track which is encoded using the AAC codec.
In order to find out what your video and audio tracks were encoded with use the following tool
Might be good to reference the docs if you have trouble there.
Optionally convert audio track if editing needed
My audio editor couldn’t open the aac file I created so I converted it to FLAC format using ffmpeg, another command line program that is insanely useful for converting audio formats (amongst other things).
So to convert I ran
Now I can open my flac file and edit the parts I want, like amplifying my microphone in the recording.
Merge audio and video tracks back in to mkv file
Right, now you have completed your editing we can stitch them back together again using the mkvmerge command
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You can see I just merged the flac formatted audio back in. I just tried it and it worked. I need to read up a bit more on file formats to be honest so if you need more info check the docs.
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Hope that helps someone :)