i.MX ProcessorsのトピックRe: Question, i.MX6Q H.264 encoding with B-Frames

Question, i.MX6Q H.264 encoding with B-Frames

SLICE — Fri, 01 Sep 2017 02:33:53 GMT

Dear team,

My customer is using i.MX6Q for their system, and they are using gstreamer for encoding H.264 video.

They are using Linux(L3.0.35_4.0.0_130424 base) as OS.

And once they tried to use B-Frame in H.264 Encoding but it did not get succeed.

Currently, they are using I and P-frames for H.264 encoding.

Could you show me the way to use B-Frames for H.264 encoding?

Is it possible to use B-frames in H.264 encoding on i.MX6Q?

Thanks,

Miyamoto

frank_zhang — Fri, 01 Sep 2017 02:55:45 GMT

Based on i.MX6DQ RM chapter 69.1.1 Features.

VPU supports H.264 BP/CBP/MP/HP decoding and H.264 BP/CBP encoding.

We can know the difference between these profiles by the below figure in WIKIH.264/MPEG-4 AVC - Wikipedia

Best Regards,

Frank

SLICE — Fri, 01 Sep 2017 03:34:17 GMT

Thanks for your prompt reply.

Let me clarify my understanding.

The specification of VPU/i.MX6Q is to support H.264 encoding BP and CBP profile.

And the BP/CBP is not using B-Frames.

So, VPU of i.MX6Q does not support using B-Frames in H.264 encoding.

Correct?

Thanks,

Miyamoto

frank_zhang — Fri, 01 Sep 2017 03:46:58 GMT

Hi Miyamoto-san,

I think your understanding is correct. Also you can refer to VPU programing guide attached for VPU programing.Thank you.

Best Regards,

Frank

joanxie — Fri, 01 Sep 2017 09:24:37 GMT

refer to the vpu reference manual, encoding doesn't support, but decoding supports it.