Audio encode in faac main profile

[Sean]

Hi,

I want to generate FLV with AAC main-profile. I used gst_inspect to check the "faac" element and found "profile" is not part of the property and is negotiated by Caps (https://github.com/GStreamer/gst-plugins-bad/blob/11ace3c18a1a2a4f8cf7a972b1142de319b882e2/ext/faac/gstfaac.c).

I tried those pipelines, but none of them work.

[1] gst_launch audiotestsrc !  audioconvert ! audio/x-raw,channels=1 ! faac bitrate=64000 ! audio/mpeg,profile=main ! flvmux ! filesink location=main_aac.flv

default gstutils.c:3766:gst_pad_create_stream_id_internal:<audiotestsrc0:src> Creating random stream-id, consider implementing a deterministic way of creating a stream-id
Caught SIGSEGV

[2] gst_launch audiotestsrc !  audioconvert ! audio/x-raw,channels=1 ! faac bitrate=64000 ! audio/mpeg ,base-profile=main ! flvmux ! filesink location=main_aac.flv

basesrc gstbasesrc.c:2948:gst_base_src_loop:<audiotestsrc0> error: Internal data flow error.
basesrc gstbasesrc.c:2948:gst_base_src_loop:<audiotestsrc0> error: streaming task paused, reason not-negotiated (-4)
ERROR: from element /GstPipeline:pipeline0/GstAudioTestSrc:audiotestsrc0: Internal data flow error.
Additional debug info:
gst/base/gstbasesrc.c(2948): gst_base_src_loop (): /GstPipeline:pipeline0/GstAudioTestSrc:audiotestsrc0:
streaming task paused, reason not-negotiated (-4)
ERROR: pipeline doesn't want to preroll.


Would anyone help to comment is there anything wrong? Thanks a lot.
 

[Vnd]

Hi,

Mian profile is supported only in mpeg 2 AAC encoder. Add mpegcersion to your caps field.

gst_launch audiotestsrc !  audioconvert ! audio/x-raw,channels=1 ! faac bitrate=64000 ! audio/mpeg,mpegversion=2,profile=main ! flvmux ! filesink location=main_aac.flv

Refer the documentation for more information.

https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-bad-plugins/html/gst-plugins-bad-plugins-faac.html

~ Sudhir

[Nicolas Dufresne-5]

Le samedi 01 octobre 2016 à 10:53 -0700, Sean a écrit :

> Hi, 
>
> I want to generate FLV with AAC main-profile. I used gst_inspect to
> check
> the "faac" element and found "profile" is not part of the property
> and is
> negotiated by Caps
> (https://github.com/GStreamer/gst-plugins-bad/blob/11ace3c18a1a2a4f8c
> f7a972b1142de319b882e2/ext/faac/gstfaac.c).
>
> I tried those pipelines, but none of them work. 
>
> [1] gst_launch audiotestsrc !  audioconvert ! audio/x-raw,channels=1
> ! faac
> bitrate=64000 ! audio/mpeg,profile=main ! flvmux ! filesink
> location=main_aac.flv 

I tried this one and it works for me. It requires a correction,
gst_launch -> gst-launch-1.0. I checked the profile with gst-
discoverer-1.0 -v main_aac.flv, and it's properly reported as base-
profile=main, profile=main. This was tested on 1.8.3 and git master.
Would it be possible to report a little more on your setup, gstreamer
version, OS etc.
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