i.MX Processors中的主题 Re: mpeg2 video decoding issue on IMX8M

mpeg2 video decoding issue on IMX8M

fredericduchass — Fri, 03 May 2019 09:08:14 GMT

Hello,

I try to decode an MPEG2TS video stream on my IMX8M but i get a lot framerate with several display glictches.

The pipeline used is :

gst-launch-1.0 filesrc location=/run/media/sda1/TS/test/testMpeg2.ts ! tsdemux ! vpudec ! queue ! kmssink

video file : attached to this post

OS : Yocto Sumo

Kernel : 4.14.78

tsdemux : 1.14.0

Some informations :

This pipeline with mpegvideoparse is working :

gst-launch-1.0 filesrc location=/run/media/sda1/TS/test/testMpeg2_1.ts ! tsdemux ! mpegvideoparse ! vpudec ! queue ! kmssink

--> why vpudec is not able to decode without mpegvideoparse ?

Using aiurdemux (without mpegvideoparse) instead of tsdemux gives better decoding but it gives me other failure in other case.

gst-launch-1.0 filesrc location=/run/media/sda1/TS/test/testMpeg2.ts ! aiurdemux ! vpudec ! queue ! kmssink

--> why aiurdemux is better in this case ?

Frédéric

Re: mpeg2 video decoding issue on IMX8M

igorpadykov — Fri, 03 May 2019 10:55:58 GMT

Hi Frédéric

one can try

gst-launch-1.0 filesrc location=file_HD.ts ! video/mpegts ! tsdemux ! queue max-size-time=0 ! vpudec ! queue max-size-time=0 ! waylandsink

use Demo Images from

i.MX Software | NXP

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: mpeg2 video decoding issue on IMX8M

fredericduchass — Fri, 03 May 2019 12:00:20 GMT

Hi Igor,

My problem is with this particular file. With others files, I have no problem.

For sure, there is a problem using tsdemux + vpudec with this file.

Can you try with the TS file that I have provided ?

Frédéric

Re: mpeg2 video decoding issue on IMX8M

igorpadykov — Fri, 03 May 2019 23:18:15 GMT

Hi Frédéric

seems you are using and developing own gstreamer sources as mentioned on
IMX8M and custom Gstreamer source

NXP supports only own imx-gst1.0-plugin - i.MX Gstreamer 1.0 Plugin described in Linux L4.14.98_2.0.0 Documentation

For support with own gstreamer customizations may be suggested to proceed with extended support of NXP Professional Services:
NXP Professional Services | NXP

Best regards
igor

Re: mpeg2 video decoding issue on IMX8M

fredericduchass — Mon, 06 May 2019 08:03:55 GMT

Hi Igor,

There is not link with the other post I've made.... (particlualrly with my custom gstreamer source)

Read carrefully but in the problem explain at the top, i use a "filesrc".

My pipeline is not specific. Every user can read an mpeg2ts file.

Frédéric