Tr : Unable to handle audio in MP4 (H264 + EC3)

[narcisse doudieu siewe]

uses RTP/RTCP and/or RTSP

RTP/RTCP to transport your stream (audio, video subtitle I suppose ) and betwe0en them this different streams
optionaly RTSP to correctly setup your movie player(the transport typecodec in use, duration of this movies ect ), to control 
the transmission pause, play, end.

after demux your container file, retrieve the good RTPs payloaders to emit your différents stream
there is a rtp payloader for video coded with thearo for example etc...

after passing each stream to it proper payloader you shoul make some rtp-bin élément responsible for the transmission
and delay over the network.


"fksrc" -->"demux"-->"payloader"-->"rtp-bin"-->"udp"  (server)

"udp"-->"depayloader"-->"decoder"-->"screen+son card" (client)




 

----- Mail transféré -----
De : pablorl <pabloxrl at gmail.com>
À : gstreamer-devel at lists.freedesktop.org 
Envoyé le : Vendredi 28 juin 2013 14h08
Objet : Unable to handle audio in MP4 (H264 + EC3)
 

Hi guys,

I'm trying to build a pipeline in order to be able to reproduce video and
audio from a MP4 file at the same time. My next goal is to stream the audio
via UDP and visualize the video, but I'm having troubles with the formats, I
presume, because of the audio and my lack of experience with Gstreamer.

So far, I'm using 2 MP4 files for my testing purposes:

-
http://www.auby.no/files/video_tests/h264_720p_mp_3.1_3mbps_aac_shrinkage.mp4

- Second file is a h264 + .ec3 (.MP4) file that I created from 2 separate
files, and now I need to process in the way I described before.

My pipeline looks like: 

/gst-launch-0.10 filesrc location=input.mp4 ! qtdemux name=demux \ 
demux.video_00 ! queue ! decodebin ! ffmpegcolorspace ! videoscale !
autovideosink \
demux. ! queue ! faad ! audioconvert ! audioresample ! autoaudiosink/

And with the first file works like a charm, video and audio are well
synchronized.

However, with the second one something strange happens. The image stands
still, I can't hear any audio and gst-launch is not giving me any hint.

If I try to split the pipelines this way:

Audio:

/gst-launch-0.10 filesrc location=input.mp4 ! qtdemux name=demux \ demux. !
queue ! faad ! audioconvert ! audioresample ! alsasink
/
Video:

/gst-launch-0.10 filesrc location=video2.mp4 ! qtdemux name=demux 
demux.video_00 ! decodebin ! ffmpegcolorspace ! videoscale ! autovideosink
/
For file number 1, video and audio work perfectly. However, for file number
2, only video works and audio outputs the following:

/Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /GstPipeline:pipeline0/GstQTDemux:demux: GStreamer
encountered a general stream error.
Additional debug info:
qtdemux.c(3891): gst_qtdemux_loop ():
/GstPipeline:pipeline0/GstQTDemux:demux:
streaming stopped, reason not-linked
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline .../

Furthermore, when I try to typefind the files they give me the same output:

/video1.mp4 - video/quicktime, variant=(string)iso/
/video2.mp4 - video/quicktime, variant=(string)iso/



So could somebody shed light over this issue? Looks like is related with
.ec3 audio format, but my skills with Gstreamer don't arrive further.







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