Hi Jaron,
FYI, MP4Client indeed does not play your stream (and does not report any
problem!!). I quickly checked. The HTTP response does not use
chunk-transfer encoding and does not contain the content-length header,
nor any IceCast or ShoutCast headers. I don't think that's correct and
this is probably why Firefox is not playing it too. We will fix
MP4Client, at least to warn about the problem, and probably to play it.
HTH,
Cyril
Le 26/09/2016 à 22:12, Jaron Viëtor a écrit :
On Mon, Sep 26, 2016 at 9:21 PM, Ralph Giles <[email protected]> wrote:
Thanks. We certainly shouldn't hang on loading, but I think the file
is invalid. mp4info reports:
ReadAtom: "live.mp4": invalid atom size, extends outside parent atom -
skipping to end of "" "mdat" 598610 vs 598206
That's odd, I'm getting this mp4info output from a download that I let run
for a few seconds:
Track Type Info
1 audio MPEG-4 AAC LC, 123.832 secs, 0 kbps, 1000 Hz
2 video H264 Baseline@3, 120.840 secs, 0 kbps, 854x480 @ 0.000000
fps
The invalid size for the mdat atom is probably caused by the file being
partially received - after all, mdat is a top-level atom and has no parent
(and the file has infinite length, so partial downloading is expected).
MP4Box also shows no errors on the file.
It plays for me in Chrome (and ffmpeg) and Edge, but not Safari or
Quicktime.
Yes, same here. We don't really care about Safari/Quicktime because on
iOS/OSX we can already use HLS as native playback method (also, iOS seems
to disable video altogether when scripting is turned off - so that is a
lost case anyway).
I agree with you that something is likely not valid, but have no idea what
it could be. It doesn't seem to be something structural with the MP4 atoms,
at least. So it must be something more subtle...
Sadly, the only applications that refuse to play it have zero debug output
(as far as I can tell - if there is a way to get more output that I am
unaware of, please enlighten me!), making this really hard to track down.
I was hoping somebody might be able to provide some information on how to
figure out why Firefox specifically dislikes the stream.
Perhaps helpful: if I download a portion of the stream to disk and attempt
to play that in Firefox, it does play, but only for ~5 seconds despite ~2
minutes of data being available. As if only the first fragment is
considered or something like that.
Thanks again for your time!
- Jaron
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Cyril Concolato
Multimedia Group / Telecom ParisTech
http://concolato.wp.mines-telecom.fr/
@cconcolato
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