[gst-devel] handling multiple audio streams

[Jyoti D]

Thanks Tim

On Wed, Feb 25, 2009 at 2:48 PM, Tim-Philipp Müller <t.i.m at zen.co.uk> wrote:

> On Mon, 2009-02-23 at 13:53 +0530, Jyoti D wrote:
>
> > I am writing an application to transcode TS file into h264 and aac
> > format and store the transcoded file.
> > The application works fine with the input files which have one video
> > and audio stream.
> > If I have more than 1 audio files I still want to transcode all the
> > audio streams into aac format and store them in a single file.
> >
> > Could someone help me to handle ore than 1 audio streams?
> >
> > I am currently using the below pipeline :
> >
> > gst-launch-0.10 uridecodebin uri=file://in-file.ts name=d d. ! queue !
> > audioconvert ! faac ! ffmux_mp4 name=mux ! filesink
> > location=~/Desktop/h264-aac/out-file.mp4  d. ! queue !
> > ffmpegcolorspace ! x264enc pass=qual quantizer=16 ref=3 subme=6
> > analyse=p4x4 me=umh ! mux.
>
> With gst-launch, you need to know how many streams there are in the
> input stream in advance, and specify a transcoding path (d. !
> queue ! ..) for each audio and video stream you want to transcode. You
> can't have a generic pipeline which handles all cases, because if there
> is only one audio stream but you specified multiple audio transcoding
> paths, then gst-launch will hang/wait forever for the other audio pads.
>
> In other words: you need to write code to handle this.
>
>
> > I get the following warning messages while running the above pipeline:
> >
> > Setting pipeline to PAUSED ...
> > Pipeline is PREROLLING ...
> > WARNING: from element /GstPipeline:pipeline0/GstURIDecodeBin:d: No
> > decoder available for type 'application/x-mpegts-private-section'.
> > Additional debug info:
> > gsturidecodebin.c(589): unknown_type_cb
> > (): /GstPipeline:pipeline0/GstURIDecodeBin:d
> > WARNING: from element /GstPipeline:pipeline0/GstURIDecodeBin:d: No
> > decoder available for type 'application/x-mpegts-private-section'.
> > Additional debug info:
> > gsturidecodebin.c(589): unknown_type_cb
> > (): /GstPipeline:pipeline0/GstURIDecodeBin:d
> > WARNING: from element /GstPipeline:pipeline0/GstURIDecodeBin:d: No
> > decoder available for type 'application/x-mpegts-private-section'.
> > Additional debug info:
> > gsturidecodebin.c(589): unknown_type_cb
> > (): /GstPipeline:pipeline0/GstURIDecodeBin:d
> > WARNING: from element /GstPipeline:pipeline0/GstURIDecodeBin:d: No
> > decoder available for type 'application/x-mpegts-private-section'.
> > Additional debug info:
> > gsturidecodebin.c(589): unknown_type_cb
> > (): /GstPipeline:pipeline0/GstURIDecodeBin:d
> > WARNING: from element /GstPipeline:pipeline0/GstURIDecodeBin:d: No
> > decoder available for type 'application/x-mpegts-private-section'.
> > Additional debug info:
> > gsturidecodebin.c(589): unknown_type_cb
> > (): /GstPipeline:pipeline0/GstURIDecodeBin:d
> > WARNING: from element /GstPipeline:pipeline0/GstURIDecodeBin:d: No
> > decoder available for type 'private/teletext'.
> > Additional debug info:
> > gsturidecodebin.c(589): unknown_type_cb
> > (): /GstPipeline:pipeline0/GstURIDecodeBin:d
>
> I don't think those are fatal or related to your problem. You can
> probably ignore them.
>
> Cheers
>  -Tim
>
>
>
>
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