Setting PIDs for mpegtsmux

Wed May 27 05:20:39 PDT 2015

I'm not aware of any way of setting properties on child elements through
gst-launch command.

But you should be able to do the filtering using some tees, tsdemuxs, and
decode bins.
The tsdemux element creates src pads with names that includes the PID of
the stream served on that pad.

Imagine you have a program (10) with 1 video stream on PID 300, and two
audio streams on PID 301, and 302.

You should be able to play the video with one of the audio streams using
something like:

gst-launch-1.0 udpsrc ..... ! tsdemux program-number=10 name=d ! queue !
decodebin ! autovideosink d.audio_012d ! queue ! decodebin ! autoaudiosink

That should choose the program number 10, play the video, and play the
audio on PID 301 (if it is part of the program). Note that the muxer uses
dec numbers for the PID while the demuxer uses hex.
If you need to decode several programs at the same time, you can put a tee
element in just before the tsdemux, and do a second branch with tsdemux

udpsrc ... ! tee name=t ! tsdemux program-number=10 name=d1 t. ! tsdemux
program-number=11 name=d2 ....

You can see the templates for the pad names running
gst-inspect-1.0 tsdemux

Jesper

On Wed, May 27, 2015 at 11:12 AM, Peter Maersk-Moller <pmaersk at gmail.com>
wrote:

> Hi Jesper.
>
> Thanks for the info. Very helpful and very useful.
>
> Now for the other end, the consuming or decoding end. I assume I can do
> something similar with tsdemux.
>
>   gst-launch-v udpsrc ..... ! mtsdemux program-number=10 ! .....
>
> Haven't tested it yet, but it'll be close I think.
>
> What if you want to control what program number to decode in a decodebin.
> Is there a less known, less documented way to parse this information to
> decodebin? I remember there is a way to set some parameters of a bin in
> GStreamer, however I have never found the formal documentations for that.
>
> best regards.
>
> Peter Maersk-Moller
>
>
>
>
> Is there a way to filter which PID gets decoded when using decodebin or
> tsdemux
>
> On Wed, May 27, 2015 at 9:39 AM, Jesper Larsen <knorr.jesper at gmail.com>
> wrote:
>
>> Well, my knowledge was just increased. You can actually set the prog-map
>> preoperty using gst-launch
>>
>> gst-launch-1.0 -v videotestsrc name=vsrc1 is-live=true do-timestamp=true
>> ! x264enc ! queue ! h264parse ! muxer.sink_300 mpegtsmux name=muxer
>> prog-map=program_map,sink_300=10,sink_301=11 ! queue ! tcpserversink
>> host=0.0.0.0 sync-method=2 recover-policy=keyframe port=5000  videotestsrc
>> name=vsrc2 is-live=true do-timestamp=true ! x264enc ! queue ! h264parse !
>> muxer.sink_301
>>
>> This will put the video on PID 300 on program number 10, and PID 301 on
>> program 11.
>>
>> On Wed, May 27, 2015 at 8:12 AM, Jesper Larsen <knorr.jesper at gmail.com>
>> wrote:
>>
>>> You can set the PID when requesting a sink pad from the mux. I.e.
>>>
>>> gst-launch-1.0 -v videotestsrc name=vsrc1 is-live=true do-timestamp=true
>>> ! x264enc ! queue ! h264parse ! muxer.sink_300 mpegtsmux name=muxer ! queue
>>> ! tcpserversink host=0.0.0.0 sync-method=2 recover-policy=keyframe
>>> port=5000  videotestsrc name=vsrc2 is-live=true do-timestamp=true ! x264enc
>>> ! queue ! h264parse ! muxer.sink_301
>>>
>>> to use PID 300 and 301 instead.
>>>
>>> I'm afraid you cannot configure which PIDs belongs to which program/PMT
>>> using gst-launch.
>>> You need to set the "prog-map" property of the mpegtsmux element, which
>>> takes a GstStructure, and to my knowledge you cannot specify a GstStructure
>>> using gst-launch.
>>>
>>> An example of setting the two videostreams to specific program numbers
>>> (3 and 4):
>>>
>>> GstElement *mux;
>>> GstStructure *pm;
>>>
>>> mux = gst_element_factory_make ("mpegtsmux", NULL);
>>>
>>> pm = gst_structure_new_empty ("program_map");
>>> gst_structure_set (pm, "sink_300", G_TYPE_INT, 3,
>>>                            "sink_301", G_TYPE_INT, 4, NULL);
>>> g_object_set (mux, "prog-map", pm, NULL);
>>>
>>> This will associate PID 300 to program 3, and PID 301 to program 4. When
>>> you add the audio streams you simply give those a fixed PID as well, and
>>> associate them with the program containing the correct video stream.
>>>
>>> Ad Astra.
>>> Jesper
>>>
>>> On Tue, May 26, 2015 at 5:25 PM, Peter Maersk-Moller <pmaersk at gmail.com>
>>> wrote:
>>>
>>>> Hi
>>>>
>>>> When you are muxing multiple video streams with mpegtsmux, is there
>>>> then a way to set/control (on the command line using gst-launch) the PIDs
>>>> of video streams that the mpegtsmux chooses for each video stream?
>>>>
>>>> A quick test with the following command line reveals mpegtsmux chooses
>>>> PID 65 and 66.
>>>>
>>>> gst-launch-1.0 -v videotestsrc name=vsrc1 is-live=true
>>>> do-timestamp=true ! x264enc ! queue ! h264parse ! mpegtsmux name=muxer !
>>>> queue ! tcpserversink host=0.0.0.0 sync-method=2 recover-policy=keyframe
>>>> port=5000  videotestsrc name=vsrc2 is-live=true do-timestamp=true ! x264enc
>>>> ! queue ! h264parse ! muxer.
>>>>
>>>> Assuming you have audio as well, is there a way to set/control which
>>>> audio stream belongs to which video stream (for PAD/PMT) ?
>>>>
>>>> Best regards
>>>> Peter MM
>>>>
>>>> _______________________________________________
>>>> gstreamer-devel mailing list
>>>> gstreamer-devel at lists.freedesktop.org
>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>
>>>>
>>>
>>
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>>
>
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