[Bug 698748] mpegtsmux: improper timestamping of output packets

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=698748
  GStreamer | gst-plugins-bad | 1.x

RajuB <raju.babannavar> changed:

           What    |Removed                     |Added
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                 CC|                            |raju.babannavar at gmail.com

--- Comment #9 from RajuB <raju.babannavar at gmail.com> 2013-12-18 10:32:22 UTC ---
I am using gstreamer 1.2.1, this issue is seen in the latest version. The above
given patch resolves this. Can anybody help me understand this issue. What I
found is best->last_pts and best->last_dts initial values sent to
mpegtsmux_collected_buffer function are set to 0, and GST_CLOCK_TIME_IS_VALID
infers it as valid time. This is leading to zero timestamps. Am I right here??

You can reproduce this issue with below given pipelines:

This produces zero timestamps:
gst-launch-1.0 filesrc location=<file path> ! tee ! queue ! decodebin
name=demux ! deinterlace mode=0 fields=1 method=4 tff=0 ! videoconvert ! tee !
queue ! videoscale ! video/x-raw ! x264enc ! mpegtsmux name=mux ! checksumsink
demux.! tee ! queue ! audioconvert ! audioresample ! volume ! voaacenc ! mux.

This produces proper timestamps:
gst-launch-1.0 filesrc location=<file path> ! tee ! queue ! decodebin !
deinterlace mode=0 fields=1 method=4 tff=0 ! videoconvert ! tee ! queue !
videoscale ! video/x-raw ! x264enc ! mpegtsmux ! checksumsink

This produces zero timestamps: 
gst-launch-1.0 filesrc location=<file path> ! tee ! queue ! decodebin !
audioconvert ! audioresample ! volume ! voaacenc ! mpegtsmux ! checksumsink

This produces proper timestamps: 
gst-launch-1.0 filesrc location=<file path> ! tee ! queue ! decodebin !
audioconvert ! audioresample ! volume ! voaacenc ! checksumsink

I tried with other muxers (like mp4mux, flvmux), where I didn't see this issue.
Please let me know if you require more details.

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