[gst-devel] Could not capture AAC audio in mp4mux properly, help !!!

[sudarshan bisht]

Set num-buffers property in alsasrc .



On Wed, Oct 7, 2009 at 12:37 PM, Yiliang Bao <yiliangb at gmail.com> wrote:

>
> Hi,
>
> I used the following pipeline:
>
>    gst-launch alsasrc ! faac, bitrate=48000, profile=2 ! mp4mux ! filesink
> location=test.m4a
>
> The file was generated, but it could not be played back by gstreamer using
> the following pipeline:
>
>   gst-launch filesrc location=test.m4a ! decodebin ! autoaudiosink
>
> Following messages are generated. It seems that the file was not generated
> properly.
>
> Setting pipeline to PAUSED ...
> Pipeline is PREROLLING ...
> ERROR: from element
> /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0: This
> file is invalid and cannot be played.
> Additional debug info:
> qtdemux.c(1447): gst_qtdemux_loop_state_header ():
> /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0:
> Header atom 'mdat' has empty length
> ERROR: pipeline doesn't want to preroll.
> Setting pipeline to NULL ...
> Freeing pipeline ...
>
> I checked the binary, and the length field of mdat is indeed 0, and I could
> not find any atoms, like moov, mvhd, etc., that describe the media.
>
> Is this the right pipeline to capture audio in MP4 file? Thanks!!
>
> Yiliang
>
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>
>
>
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-- 
Regards,

Sudarshan Bisht
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