AM5728: AAC encode issue

JINMAN KIM

Prodigy 60 points

Part Number: AM5728

Hello TI,

I am using a general purpose EVM of AM5728. I am using ti-processor-sdk-linux-am57xx-evm-06.00.00.07 SDK.

I am trying to encode audio in aac format as follows.

gst-launch-1.0 -v alsasrc num-buffers=1000 ! queue ! avenc_aac ! filesink location=/usr/share/ti/audio/test.aac

It produced test.aac successfully, but I got the following error message when it decodes.

root@am57xx-evm: gst-launch-1.0 filesrc location=/usr/share/ti/audio/test.aac ! queue ! faad ! alsasink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /GstPipeline:pipeline0/GstFaad:faad0: Could not decode stream.
Additional debug info:
../../../../gst-plugins-base-1.14.4/gst-libs/gst/audio/gstaudiodecoder.c(1558): gst_audio_decoder_push_buffers (): /GstPipeline:pipeline0/GstFaad:faad0:
failed to parse stream
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

Thanks

over 6 years ago

0 Krunal Bhargav34 over 6 years ago

TI__Mastermind 45005 points

Hello,

As mentioned in the following document, Gstreamer is part of the open source software that gets integrated in our SDK but TI does not own, maintain and support all the FOSS(free and open source software). Please reach out to the Gstreamer community for further support.

Regards,
Krunal

0 JINMAN KIM over 6 years ago in reply to Krunal Bhargav34

Prodigy 60 points

Thanks for your reply, Krunal !

I need AAC encoding demo on ARM

In PSDK Linux 06_00_00_07 technical manual, it says as follows

Demo applications also demonstrate the following ARM based coding capabilities.

Video decoding on ARM: H.265
Audio encoding and decoding on ARM: AAC, MPEG2 (leveraging open source codecs)

But I got the error message when it decodes.
Please let me know how to encode audio in AAC format using gstreamer.
Regards
JINMAN

0 Krunal Bhargav34 over 6 years ago in reply to JINMAN KIM

TI__Mastermind 45005 points

Hello,

I recommend you to please review the following bash script for the AAC decode example: https://git.ti.com/cgit/matrix-gui-v2/matrix-gui-v2-apps/tree/multimedia_apps/arm_multimedia_aacdec/runAACDec.sh

Here is a template of my working pipeline:

root@am57xx-evm:/usr/share/ti/audio# gst-launch-1.0 filesrc location=HistoryOfTI.aac !  queue ! faad ! alsasink device=hw:0,0

Regards,
Krunal

0 JINMAN KIM over 6 years ago in reply to Krunal Bhargav34

Prodigy 60 points

Hi Krunal !

I already reviewed the bash script and tried as follows.

gst-launch-1.0 -v alsasrc num-buffers=1000 ! queue ! faac ! filesink location=/usr/share/ti/audio/test.aac ==> Fail

gst-launch-1.0 -v alsasrc num-buffers=1000 ! queue ! avenc_aac ! filesink location=/usr/share/ti/audio/test.aac => AAC file is created but decoding error

AAC decoding is OK, but AAC encoding is Not OK !

Have you tried AAC encoding and no problem ?

Is there any template of AAC encoding ?

Regards

JINMAN

0 Krunal Bhargav34 over 6 years ago in reply to JINMAN KIM

TI__Mastermind 45005 points

Hello,

We do not have any AAC encoding example and here is the project that contains all the out of box examples that TI provides.

Regards,
Krunal

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AM5728: AAC encode issue