[Mosu]

Thanks for the feedback. CodecPrivate is already included in mkvmerge's identification output, but the relative delay isn't.

That one's a bit tricky to implement, too. In general I don't want identification to be quick (it's already taking a long time due to all the different file types it supports). Scanning the file for the minimum timecode for each track is time consuming, and I definitely don't want to do it for each and every file as most people wouldn't need that information. I could introduce some kind of flags that enable deeper inspection of the file.

How do you handle e.g. subtitle tracks at the moment? Their first timestamp could be almost anywhere within the file.