An open-source media container format.

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1answer
43 views

Matroska format's framerate is not accurate with certain values

If the Matroska format is used, in certain framerates it doesn't record at exact input framerate, but rather at a little higher than the input framerate. As an example: ffmpeg -video_size 1920x1080 -...
2
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3answers
67 views

Is there a video container which is able to handle segments of different video quality (or even size)?

Let's assume I have a video of 10 minutes length. And I want to reduce its size by having some parts in high bitrate, while other less important parts can be low bitrate. For this I'd cut the original ...
1
vote
0answers
117 views

ffmpeg not only writes mkv index at the end, but overwrites multiple places in file

According to Matroska options , the muxer writes the index at the end of file by default. However, if I save incomplete mkv file while encoding and compare it with the final clip, I can see more than ...
1
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1answer
15 views

Chaining Matroska files

Often there is a case where one has a series of the already muxed Matroska files, and they have a logical order. It may be desirable to chain them all together, giving a hint to the video player, that ...
1
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1answer
63 views

What is the technique behind mkv. video format?

Can someone please explain in detail the technique of encoding and decoding used in mkv video format and what is the major difference between mkv. and other video formats. It will be good if someone ...
0
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1answer
351 views

Hardsubbing ASS onto MPEG4

I have an ASS as the subtitle stream (with these fonts: - Orotund, jagb_.tff, jagw_.ttf, JUST.ttf, Gabrielle.ttf) in an MKV. What technique should I use to hardsub this subtitle stream onto the MPEG4 ...
3
votes
1answer
599 views

synchronizing video and audio in a remuxed MKV

I am quite new in the area of audio/video manipulation so apologies if the question is obvious. I did not manage to find an answer online, though. I have a MKV file with several tracks: video (MPEG4),...