Feature request:add mkvmerge

[taozi1996]

FFmpeg can't split some special format,but mkvmerge of mkvtoolnix can split them.
Can you add mkvmerge so that we may choose mkvmerge or ffmpeg to split,merge and mux?
https://mkvtoolnix.download/doc/mkvmerge.html

[mifi]

what kind of format is this?

[taozi1996]

what kind of format is this?

audio like dts,lpcm

[taozi1996]

Sometimes ffmpeg cannot directly copy the stream and needs to set some parameters, but mkvmerge will automatically use some codecs, which is also lossless.For Blu-ray video, HD enthusiasts usually use mkvmerge or tsmuxer(https://github.com/justdan96/tsMuxer) to split and mux them.

[mifi]

I just tested a DTS file from here https://thedigitaltheater.com/dts-trailers/ and it seems to work for me:

If you can provide a file that does not cut properly in ffmpeg, then maybe I can look into it.

[taozi1996]

I just tested a DTS file from here https://thedigitaltheater.com/dts-trailers/ and it seems to work for me:

If you can provide a file that does not cut properly in ffmpeg, then maybe I can look into it.
test.zip

This is the audio that I use mkvmerge splited, and ffmpeg cannot split it.

[mifi]

strange. for me with the latest losslesscut it works. I'm able to cut that file's audio

[taozi1996]

The audio of m2ts video used losslesscut split will have noise

[taozi1996]

strange. for me with the latest losslesscut it works. I'm able to cut that file's audio
You can try this file.It will have a noise of audio after splited by losslesscut.
https://github.com/taozi1996/test/blob/main/PRs.split.9.zip

[mifi]

Thanks. The file you provided indeed fails, because of pcm_bluray. Same as this issue: #476 - there is also a workaround with converting to normal PCM first (lossless).
As for mkvmerge, it's not easy to integrate it into losslesscut. If it's only for pcm_bluray support, It's too much work. If it has other benefits then I can consider it in the future, but I believe ffmpeg supports way more formats/codecs than mkvmerge so until there is a really good reason, I don't think it will happen any time soon unfortunately.