Gstreamer pipeline multiple sink to one src
Looking for explanation how to using named elements in respect with muxing two inputs in one module. For instance muxing audio and video in one mpegtsmux modle
gst-launch filesrc location=surround.mp4 ! decodebin name=dmux ! queue ! audioconvert ! lamemp3enc dmux. ! queue ! x264enc ! mpegtsmux name=mux ! queue ! filesink location=out.ts
Above pipeline gives plugins interconnection like below
So it shows audio doesn't connect to mpegtsmus.
How to modify command line to have audio and video muxedup in mpegtsmux ?
Thanks!
It is not linked because your launch line doesn't do it. Notice how the lamemp3enc element is not linked downstream.
Update your launch line to:
gst-launch filesrc location=surround.mp4 ! decodebin name=dmux ! queue ! audioconvert ! lamemp3enc ! mux. dmux. ! queue ! x264enc ! mpegtsmux name=mux ! queue ! filesink location=out.ts
The only change is " ! mux." after the lamemp3enc to tell it to link to the mpegtsmux.
While you are updating things, please notice that you are using gstreamer 0.10 that is years obsolete and unmantained, please upgrade to the 1.x series to get latest improvements and bugfixes.
I'll try to give the basic idea though I'm not that proficient and could be plain wrong.
!
) but with a start of another element, then it's a new sub-pipeline: filesrc location=a.mp4 ! qtdemux name=demp4
filesrc location=a.mp4 ! qtdemux name=demp4
demp4. ! something
demp4. ! something
somedemux.audio_00
can be a source and/or a sink in other sub-pipelines: demp4. ! queue ! decodebin ! x264enc ! mux.
demp4. ! queue ! decodebin ! x264enc ! mux.
mpegtsmux name=mux
or referenced by name: mux.
The dot at the end is a syntax of a reference. mux. ! filesink location=out.ts
mux. ! filesink location=out.ts
muxname.audio_00
. muxname.
is a shortcut to "suitable audio/video pad from muxname
". The example
That said, I assume that your mp4 file has both audio and video. In this case, you need to demux it into 2 streams first, decode, re-encode and then mux them back.
Indeed, your audio is not connected to mpegtsmux
.
If you really need to decode the streams, that's what I would do. This didn't work for me, though:
gst-launch-1.0 filesrc location=surround.mp4 !
qtdemux name=demp4
demp4. ! queue ! decodebin ! audioconvert ! lamemp3enc ! mpegtsmux name=mux
demp4. ! queue ! decodebin ! x264enc ! mux.
mux. ! filesink location=out.ts
or let's use decodebin
to magically decode both streams:
gst-launch-1.0 filesrc location=surround.mp4 !
decodebin name=demp4
demp4. ! queue ! audioconvert ! lamemp3enc ! mpegtsmux name=mux
demp4. ! queue ! x264enc ! mux.
mux. ! filesink location=out.ts
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