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awslabs / amazon-kinesis-video-streams-producer-sdk-java

Allows developers to install and customize their connected camera and other devices to securely stream video, audio, and time-encoded data to Kinesis Video Streams

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calculate video CPD for V_MPEG/ISO/AVC and contain H.264 encoded media.

amiya-elear opened this issue · comments

commented

Hi Team,

Is there any way to calculate video CPD for V_MPEG/ISO/AVC and contain H.264 encoded media.
How we are calculating for audio here: https://github.com/awslabs/amazon-kinesis-video-streams-pic/blob/master/src/mkvgen/src/MkvGenerator.c#L1704.
Thanks.

commented

It's possible to generate the CPD for h264 (in h264 it's SPS and PPS) if you know all of the details from the encoder.

Generally, your encoder should have a way to communicate the SPS and PPS to the clients. Some of the media pipelines have a backchannel to get the CPD while others would prepend the SPS and PPS in Annex-B format to the I-frame.

We have code that automatically extracts it from Annex-B format stream if it's prepended to the I-frame, no CPD had been specified yet and the adaptation flags have Annex-B -> AvCC format adaptation.

https://github.com/awslabs/amazon-kinesis-video-streams-pic/blob/master/src/mkvgen/src/MkvGenerator.c#L235

Please let us know if you have further questions and if not please go ahead and resolve the issue

commented

Is KVS java SDK provide a similar function like mkvgenGeneratePcmCpd() to generate CPD for h264 video frame? if yes then we can create CPD for h264 video frames by provide required data.

commented

Per my answer above - you can’t generate the CPD for h264. Perhaps I am not understanding your question? Could you clarify?

commented

Thanks Mushmal. I got it.