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AAC stream play with faad gst plugin : negotiation problem

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Ramana_polaka

AAC stream play with faad gst plugin : negotiation problem

Hi,

I tried to play an aac stream using faad bad plugin.

$ gst-typefind AAC_ADTS_LC_24_193_3.aac

AAC_ADTS_LC_24_193_3.aac - audio/mpeg, framed=(boolean)false, mpegversion=(int)4

Command used:

----------------------

gst-launch filesrc location=AAC_ADTS_LC_24_193_3.aac ! faad ! alsasink

Error log

------------

Setting pipeline to PAUSED ...

Pipeline is PREROLLING ...

ERROR: from element /pipeline0/filesrc0: Internal data flow error.

Additional debug info:

gstbasesrc.c(2165): gst_base_src_loop (): /pipeline0/filesrc0:

streaming task paused, reason not-negotiated (-4)

ERROR: pipeline doesn't want to preroll.

Setting pipeline to NULL ...

FREEING pipeline ...

It looks there is problem in negotiation. Should I use any parser? I tried using ffdemux_mov_mp4_m4a_3gp_3g2_mj2. But no use.

Any suggestions pls?

Regards,

Ramana

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Frans van Berckel

Re: AAC stream play with faad gst plugin : negotiation problem

Hi,

You got to test it with this pipe line ...

gst-launch filesrc location="AAC_ADTS_LC_24_193_3.aac" ! decodebin !
audioconvert ! faac ! faad ! audioconvert ! alsasink

Frans van Berckel

On Wed, 2008-06-11 at 11:53 +0530, Ramana Reddy Polaka wrote:

> Hi,
>
> I tried to play an aac stream using faad bad plugin.
>
> $ gst-typefind AAC_ADTS_LC_24_193_3.aac
>
> AAC_ADTS_LC_24_193_3.aac - audio/mpeg, framed=(boolean)false,
> mpegversion=(int)4
>
>
>
> Command used:
>
> ----------------------
>
> gst-launch filesrc location=AAC_ADTS_LC_24_193_3.aac ! faad !
> alsasink
>
>
>
> Error log
>
> ------------
>
>
>
> Setting pipeline to PAUSED ...
>
> Pipeline is PREROLLING ...
>
> ERROR: from element /pipeline0/filesrc0: Internal data flow error.
>
> Additional debug info:
>
> gstbasesrc.c(2165): gst_base_src_loop (): /pipeline0/filesrc0:
>
> streaming task paused, reason not-negotiated (-4)
>
> ERROR: pipeline doesn't want to preroll.
>
> Setting pipeline to NULL ...
>
> FREEING pipeline ...
>
>
>
>
>
> It looks there is problem in negotiation. Should I use any parser? I
> tried using ffdemux_mov_mp4_m4a_3gp_3g2_mj2. But no use.
>
> Any suggestions pls?
>
>
>
> Regards,
>
> Ramana
>
>
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> to copy, disclose, or distribute this e-mail or its contents to any other person and
> any such actions are unlawful. This e-mail may contain viruses. Infosys has taken
> every reasonable precaution to minimize this risk, but is not liable for any damage
> you may sustain as a result of any virus in this e-mail. You should carry out your
> own virus checks before opening the e-mail or attachment. Infosys reserves the
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> Infosys e-mail system.
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Ramana_polaka

Re: AAC stream play with faad gst plugin : negotiation problem

-----Original Message-----
From: Frans van Berckel [mailto:[hidden email]]
Sent: Wednesday, June 11, 2008 12:32 PM
To: Ramana Reddy Polaka
Cc: [hidden email]
Subject: Re: [gst-devel] AAC stream play with faad gst plugin : negotiation problem

Hi,

You got to test it with this pipe line ...

gst-launch filesrc location="AAC_ADTS_LC_24_193_3.aac" ! decodebin ! audioconvert ! faac ! faad ! audioconvert ! alsasink

log for above pipeline
----------------------
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /pipeline0/alsasink0: Could not get/set settings from/on resource.
Additional debug info:
Gstalsasink.c(528): set_hwparams (): /pipeline0/alsasink0:
Unable to set hw params for playback: Invalid argument
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...

FREEING pipeline ...

Frans van Berckel

On Wed, 2008-06-11 at 11:53 +0530, Ramana Reddy Polaka wrote:

Christopher Halse Rogers

Re: AAC stream play with faad gst plugin : negotiation problem

In reply to this post by Frans van Berckel

On 6/11/08, Frans van Berckel <[hidden email]> wrote:
> Hi,
>
> You got to test it with this pipe line ...
>
> gst-launch filesrc location="AAC_ADTS_LC_24_193_3.aac" ! decodebin !
> audioconvert ! faac ! faad ! audioconvert ! alsasink
>
Why are you converting to AAC (with the faac element) and then from
AAC to raw audio (with the faad element)?

I'm not sure that this will work, anyway. Your aac file quite
possibly doesn't have the metadata headers (things like sample rate,
bitrate, etc) that faad requires. If I remember correctly, faad won't
play a raw aac stream.

On the other hand, since typefind finds some information, maybe it's
just that you're missing an audioconvert between faad and alsasink.
You may want to try

gst-launch filesrc location=AAC_ADTS_LC_24_193_3.aac ! faad !
audioconvert ! alsasink
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