pipeline fails with two or more video and audio sources

[Natanael Mojica]

I have a pipeline using input-selector and audiomixer.
audiomixer  for mix different audio stream from audio containers like mp3, wav or form video and audio containers.
input-selector for switch between  different video sources like v4l2src, avi, mp4 and mkv .
the sources (audio and video) are added dynamically, by default the pipeline start with v4l2 and alsa  , them I add others sources. If I add a audio source like (mp3, wav, flac, etc) the pipeline works, then if  I add a avi file, i can switch between v4l2src and the video contained into the avi file and show it on the screen.

but if I add any mp4 or mkv file, i get this error message:

Got message type: error, from qtdemux1
Message: GStreamer encountered a general stream error.

using GST_DEBUG on qtdemux i get:

http://pastebin.com/EtLpqf4M

bellow the pipeline of my  code:


gst-launch-1.0 -v filesrc location=bitter.mp4 do-timestamp=true ! decodebin name=dec dec. ! queue ! audiomixer name=mix ! queue ! audioconvert ! audioresample ! audio/x-raw, format=S16LE, rate=44100 ,channels=2 ! volume ! tee name=t2 ! queue ! faac bitrate=128000 ! aacparse ! queue ! flvmux name=mux streamable=true ! fakesink sync=false dec. ! queue ! input-selector name=selector ! queue ! videoscale ! videoconvert ! video/x-raw, format=I420, width=640, heigth=480 ! videobalance ! videoconvert ! warptv ! videoconvert ! tee name=t1 ! queue ! videoscale ! video/x-raw, format=I420 ! x264enc psy-tune=2 speed-preset=1 key-int-max=60 bitrate=2500 aud=true byte-stream=true ! mux. t1. ! queue ! videoconvert !  autovideosink sync=true t2. ! queue ! audioconvert ! autoaudiosink sync=true v4l2src do-timestamp=true ! selector. alsasrc do-timestamp=true ! mix.

without v4l2src and alsasrc the pipeline works fine. I set different caps between v4l2src and alsa with input-selector and audiomixer, but that not works, the same error message.

what parser Is nedded in my pipeline??

if I select this properties for input-selector and audiomixer:

   g_object_set(videoSelector, "sync-streams", true, "sync-mode", 1,NULL);
   g_object_set(audiomixer, "start-time-selection" ,2, "start-time", 0,"caps", Acaps, NULL)

not work yet

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[Sebastian Dröge-3]

On So, 2016-06-12 at 11:38 -0600, Natanael Mojica wrote:


> without v4l2src and alsasrc the pipeline works fine. I set different
> caps between v4l2src and alsa with input-selector and audiomixer, but
> that not works, the same error message.
>
> what parser Is nedded in my pipeline??

Your pipeline is quite big, please try to simplify it to the smallest
pipeline that still shows the behaviour. Like removing branches,
removing unneeded filters (warptv for example), etc.

Also you should always add converters before the audiomixer and
compositor pads. audioconvert/audioresample and videoconvert.

--
Sebastian Dröge, Centricular Ltd · http://www.centricular.com
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