[Bug 751490] mpegaudioparse: Non-increasing PTS issue

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=751490

Hyunjun <zzoon.ko at samsung.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |zzoon.ko at samsung.com

--- Comment #8 from Hyunjun <zzoon.ko at samsung.com> ---
I'm investigating into this issue.
In case of "04.209059333" problem,
in gst_base_parse_chain,

Duration is 0:00:00.024000000
The pts in adaptor is 0:00:04.137059333 ( newly pushed by tsdemux )
prev_pts is 0:00:04.041059333
next_pts is 0:00:04.113059333, which is updated in previous
gst_base_parse_handle_and_push_frame call,
which means the next expected pts is this.

But by the logic below, next_pts is updated to 0:00:04.137059333, which means
one duration is skipped.

    if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
      parse->priv->prev_pts = parse->priv->next_pts = pts;

This causes the reported problem finally.
I think this is happening because gap of PTS between each audio stream in ts
file is not consistent even audio data size is consistent.
Sometimes 72ms for 2010 bytes, sometimes 96ms for 2010 bytes.
And I don't think this ts file is invalid, but I'm not sure baseparse should
handle this case.

First case
PTS: 0:00:04.041059333  DTS: 0:00:04.041059333
PTS: 0:00:04.065059333  DTS: 0:00:04.041059333
PTS: 0:00:04.089059333  DTS: 0:00:04.041059333  
PTS: 0:00:04.137059333  DTS: 0:00:04.137059333 -> one duration skipped
PTS: 0:00:04.161059333  DTS: 0:00:04.137059333
PTS: 0:00:04.185059333  DTS: 0:00:04.137059333
PTS: 0:00:04.209059333  DTS: 0:00:04.137059333
PTS: 0:00:04.209059333  DTS: 0:00:04.209059333 -> problem happens
PTS: 0:00:04.233059333  DTS: 0:00:04.209059333
PTS: 0:00:04.257059333  DTS: 0:00:04.209059333

Second case
PTS: 0:00:12.081059333  DTS: 0:00:12.081059333
PTS: 0:00:12.105059333  DTS: 0:00:12.081059333
PTS: 0:00:12.129059333  DTS: 0:00:12.081059333
PTS: 0:00:12.177059333  DTS: 0:00:12.177059333 -> one duration skipped
PTS: 0:00:12.201059333  DTS: 0:00:12.177059333
PTS: 0:00:12.225059333  DTS: 0:00:12.177059333
PTS: 0:00:12.249059333  DTS: 0:00:12.177059333
PTS: 0:00:12.249059333  DTS: 0:00:12.249059333 -> problem happens
PTS: 0:00:12.273059333  DTS: 0:00:12.249059333

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.