[Bug]: MP4 File appears to have time duration 00:01 in video player about streampack

[ThibaultBee]

Hi,

The MP4 is not a strict MP4 but is a Fragmented MP4.
These players infers the duration from the moov box (1s is the duration of the first moov + mdat) but does not seem to read after.
Have you tested with VLC or other players?

Well, it is either the player does not properly read the info, either there is missing hint box in the MP4 generated by StreamPack. I will have a look on that when I have time 👍

[ThibaultBee]

It might be because tfra box entries time is not related to the moov mdhd box duration.

[ThibaultBee]

Bad news, I tested a mobile player with a progressive mp4 generated from ffmpeg and the duration was also 1s.
I guess mobile player are kind of lazy.

The easiest way to fix your issue is (from my opinion) to use the MediaMuxer directly. See https://developer.android.com/reference/android/media/MediaMuxer
On next version I plan to use the MediaMuxer for most file recording.