Question / Help Crash safe format that supports multiple audio tracks?

[Woofington]

First off, I love OBS studios, it is a really slick recording/streaming solution.

I recently ran into some trouble though, it would seem that if OBS crashes while recording an .mp4 the file is ultimately just garbage. After some research I came to realize this is because .mp4 needs to do some finalization at the end of the recording process and fixing that if its absent is almost impossible.

So that sucks but then I found out online, I should just be using FLV since it can be recovered if OBS crashes mid-record and can easily and losslessly be converted to mp4! Huzzah!

But there is one problem, FLV doesn't support multiple audio tracks and for my recording I need multiple audio tracks. Unfortunate!

So I have two questions:

1) Is there a crash-safe recording format similar to flv that can support multiple audio tracks?

2) If not is there anyway to make OBS record in short chunked intervals? As in every five minutes save the mp4 and begin recording a new file? That way if OBS crashes during record I only lose a small portion of my footage?

 

[c3r1c3]

1. MKV
2. If you mess with the advanced FFMPEG recording options you might be able to get a segmented format working (like m2ts).

 

[Woofington]

1. MKV
2. If you mess with the advanced FFMPEG recording options you might be able to get a segmented format working (like m2ts).

A couple questions:
1) Does MKV convert to mp4 losslessly? I've heard of some testing of crashed recording while recording in MKV and I heard you still had to do some form of recovery? Is that true? I've tried recording in MKV in the past and while it seems to work I cannot import it into my video editting software so I'd need to convert it.

2) Can you expand on the FFMPEG recording options? I can't seem to find that in the settings.

 

[Sapiens]

Remuxing from MKV to MP4 will be lossless since only the container format is changing, not the actual video and audio streams.