topic Re: How to get PTS from the H264 decoder Module ? in i.MX Processors

How to get PTS from the H264 decoder Module ?

subodh — Wed, 08 Oct 2014 10:40:05 GMT

Hi,

I am trying to write a sample media player on iMX6.

One of the primary objectives is to understand the synchronization between audio and video.

To accomplish this my application needs to get video PTS from decoder and the submit the corresponding

audio data to the AACPlus decoder API.

The VPU documentation does not mention any specifics about the timing information.

I am not sure but from what I understood, Gstreamer maintains its own clock and submits the data accordingly.

Please guide me on this front regarding AV synchronization.

Thanks in advance.

igorpadykov — Thu, 09 Oct 2014 01:09:45 GMT

Hi Subodh

you are correct VPU does not maintain audio synchro

it is done in gstreamer . Please check timestamping API

gstreamer documentation below

Best regards

igor

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subodh — Thu, 09 Oct 2014 05:09:08 GMT

Hi Igor,

I want to write a native player around the vpu API, in that case what method would you suggest for AV Synchronization.

igorpadykov — Thu, 09 Oct 2014 12:45:34 GMT

Hi Subodh

I think you can look below and choose what is suitable

Best regards

igor