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Questions tagged [mkv]

Questions relating to the Matroska (mkv) audio/video multimedia file format

117
votes
6answers
217k views

How to convert .mkv file into .mp4 file losslessly?

I need to convert a video file from Matroska container into mp4 container. Matroska file contains one h.264 video track and one AC3 sound track. It should be possible to do this losslessly, but how to ...
10
votes
6answers
79k views

Convert mkv to mp4 with ffmpeg

When I try converting mkv to mp4 using ffmpeg, the following error occurs: version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers built on Jun 12 2012 16:52:09 with ...
34
votes
2answers
47k views

Extract subtitle from mkv files

The problem is that videoplayers in Ubuntu have a problem with integrated central european subtitles.The solution is to extract them. Does anyone knows if there is a command in the terminal or a ...
4
votes
1answer
14k views

Why can I hear only a few audio channels when playing video files?

When I play specific MKV files there is not all the sound. There is actually only the background sound, like a song on the background, but I hear no talking. The strangest thing is that it is not for ...
6
votes
3answers
2k views

My video (.mkv) thumbnails are green (or monochromatic)?

When I installed Ubuntu Gnome 17.04 thumbnails for .mkv were not showing up at all, Then it automatically got fixed, now it's generating the Thumbnails but as weird as it may sound, they're all green (...
3
votes
2answers
30k views

How to properly play .mkv files?

I am having a problem while playing .mkv files. Every time I play a .mkv file, the audio can be heard but video cannot be seen. The only way to see the video if I actually right click on it or put a ...
6
votes
3answers
13k views

Trying to convert MKV to MP4 with avconv, failing

I am trying to convert an MKV file to MP4 to be compatible with my PS3. I am using: avconv -i file.mkv -c copy file.mp4 It fails and I get the following error: [mp4 @ 0x8a17c00] pts < dts in ...
9
votes
3answers
15k views

Add an audio file to and mkv video

I'm quite new to multimedia things, I'm trying to find a way to make nice screencasts, I've already been able to capture my desktop with ffmpeg: $ ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(...
3
votes
4answers
5k views

Why doesn't .mkv files play properly with ubuntu-restricted-extra?

I am running Ubuntu 10.04 with ubuntu-resticted-extra installed. When I play .mkv with the default player, totem it causes the player to stop suddenly without any warning after a random amount of time!...
2
votes
0answers
77 views

Green Thumbnails in Ubuntu Gnome 17.04 [duplicate]

My video (.mkv) thumbnails are green (or monochromatic)? This didn't solve my problem, the situation is exactly the same, it used to work in 16.10 but it's not working now. Is this a bug should I ...
1
vote
1answer
426 views

Mkv thumbnails are not generating at all

After updating to Ubuntu 17.04 my .mkv files aren't showing any thumbnails What have I tried so far? Installed ubuntu-restricted-extras that didn't work. Rebooted after installing ubuntu-restricted-...