raw tags for mp4 audio read as 0 second

[lachlan-00]

Just referencing an open issue we have.
ampache/ampache#3196 (comment)

I'm not sure about the specifics of mp4 audio but the playtime_seconds is being read as 0 in the raw tags

I do still have the reference file if you want to check it out.

[JamesHeinrich]

I would need to see a sample file, please.

[JamesHeinrich]

I took a look at your sample file and it seemed to work as expected, playtime_seconds shows 15.34

[lachlan-00]

okay let me dig further then.

[lachlan-00]

Using demo.basic.php and putting the file in the same folder i still get 0 for playtime_seconds.
Is there a non-default setting that's needed to return the time?

I also see that quicktime files are only returning the second value in arrays. I can't seem to track down where this is being overwritten in module.audio-video.quicktime.php

edit

i've run with pph 7.4, 8.0 and 8.1 as well just to see if there's anything not being read

[JamesHeinrich]

I took a look at your sample file and it seemed to work as expected, playtime_seconds shows 15.34

I think I was sloppy and looked at the wrong sample file :(
I concur that it's returning a playtime of zero. I will investigate further.

[JamesHeinrich]

Your sample file is a "fragmented MP4" (more useful for streaming) where data is stored in many small independent segments rather than one large segment. I haven't been able to find useful documentation as to the exact structure of some of the crucial structures, notably
tfhd // Track Fragment HeaDer box
mfhd // Movie Fragment HeaDer box
mvex // MoVie EXtends box
If someone can find some appropriate documentation showing the byte structure of these and related please let me know.

[lachlan-00]

Thank you for taking the time to look again.

I'll see if I can find out more about them and report anything back here.