demux/remux pipeline hangs when audio is added

[Carah Smith]

Sorry, put that on the wrong thread...


On Wed, Oct 2, 2013 at 12:29 PM, Carah Smith <carah29ingress at gmail.com>wrote:

> Thanks! I will try adding queues etc. Robert, I tried your command line
> gst-launch and it still hangs... Here is the output:
>
> gst-launch-1.0 filesrc location=stream_1.ts ! tsdemux name=demux ! queue !
> mpegvideoparse ! mpeg2dec ! x264enc ! mpegtsmux name=mux ! hlssink demux. !
> queue ! a52dec ! audioconvert ! faac ! mux.
> Setting pipeline to PAUSED ...
> Pipeline is PREROLLING ...
> Redistribute latency...
> Redistribute latency..
>
>
> Message: 3
>> Date: Wed, 2 Oct 2013 13:46:50 -0400
>> From: Robert Krakora <rob.krakora at messagenetsystems.com>
>> To: Discussion of the development of and with GStreamer
>>         <gstreamer-devel at lists.freedesktop.org>
>> Subject: Re: demux/remux pipeline hangs when audio is added
>> Message-ID:
>>         <
>> CA+Dpatg7NtwTBG_eCHGSPsgpgpk_wwVzz1su2f3_BLdGQhGtoA at mail.gmail.com>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> Something like this Tim?
>>
>> gst-launch filesrc location=<path> ! tsdemux name=demux ! queue
>> ! mpegvideoparse ! mpeg2dec ! x264enc ! mpegtsmux name=mux ! hlssink
>> demux.
>> ! queue ! a52dec ! audioconvert ! faac ! mux.
>>
>>
>> On Wed, Oct 2, 2013 at 1:38 PM, Tim-Philipp M?ller <t.i.m at zen.co.uk>
>> wrote:
>>
>> > On Wed, 2013-10-02 at 11:19 -0600, Carah Smith wrote:
>> >
>> > Hi,
>> >
>> > > I am trying to make a pipeline that takes a transport stream in,
>> > > demuxes it, does some transcoding, remuxes, and sends it to a sink.
>> > > I can make it work if I only have video in the pipeline or if I only
>> > > have audio but once I add both, the application hangs. Here is my
>> > > source code (I removed all the error checking for emailing to reduce
>> > > line length):
>> >
>> > You need a queue in each branch right after the demuxer. This is needed
>> > for the "preroll" mechanism to work properly, which blocks the pushing
>> > thread in the sink waiting for the 'Go!', but the pipeline won't start
>> > unless all sinks have data, which they won't get if you don't use
>> > queues.
>> >
>> > You might also want/need a parser in front of each decoder.
>> >
>> > Cheers
>> >  -Tim
>> >
>> >
>> > _______________________________________________
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>> > gstreamer-devel at lists.freedesktop.org
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>> >
>>
>>
>>
>> --
>>
>> Rob Krakora,
>> Senior Software Engineer
>>
>> MessageNet Systems
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