cannot been deinterlaced with i.MX8MQ

[zetfan]

Hello.

I am trying to play H.264 and MPEG2 interlaced video using a hardware decoder with i.MX8MQ,

but the displayed video has not been deinterlaced.

The decoder library log is as follows,

and the output format is progressive.

VideoDecoderBase: New format(pixelfmt=0x103, min buffers=3, request buffers 6, w*h=1440 x 1088, crop=(0 0 1440 1080), interlaced 0)

My questions are:

1. Does the imx8mq VPU not have the ability to deinterlace during decoding?

2. If so, why is the video being output as progressive?

The environment is as follows:

OS: Android 11.0.0

Player: VLC for android 3.1.7

[Bio_TICFSL]

Hello,

For H1 encoder IP, which can support interlaced video according to the reference manual, but for VPU API, which couldn't handle interlaced video on encoding, but decoder api does.

regards

[zetfan]

Hello Bio_TICFSL,

I am currently using the imx-vpuwrap library,

but is it possible to perform deinterlacing?

Also, can I check if deinterlacing is enabled from a CPU register?

Thank you.

[Bio_TICFSL]

Hi,

The VPUWrap library does not support deinterlaced video, as mentioned before just the API does but you have to change the code.

Regards

[Bio_TICFSL]

Hello,

You need to change the file utils and try to change the VpuScanAvccFrameNalNu, I think also the datasize, of course this is going to be part of VPUAPI.

Regards

[zetfan]

Hi,

I believe deinterlacing is done by setting bAllowFieldDBP to true and using the buffer in the VPU,

but now two frames are displayed one above the other.

Are there any additional changes I need to make?

Thank you.

[Bio_TICFSL]

No, Form the point of view of VPU.

regards

[zetfan]

Does the software deinterlace the two frames output from the VPU?

Thank you.

[zetfan]

Hi,

Why doesn't the VPUWrap library implement interlace detection?

Was there a risk of performance degradation or anything like that?

Thank you.

[zetfan]

@Bio_TICFSL

Hi,

What is the status regarding the changes required to the VPUWrap library to deinterlace?

Could you please let me know what the changes required are?

[zetfan]

Hi,

Can you please tell me what changes are needed to the VPUWrap library to enable deinterlacing?