topic Re: Viewing Gstreamer video on HDMI, LCD while Transcoding on i.MX8M Plus in i.MX Processors

Viewing Gstreamer video on HDMI, LCD while Transcoding on i.MX8M Plus

ottob — Thu, 02 Sep 2021 01:02:05 GMT

Hello There !

We are looking at using the iMX8M for a video decoder product, see attached. Essentially its taking in MPEG2 TS, decoding it and showing it in the GUI (LCD), TV/HDMI while re-encoding / transcoding the video to H.265. I need the decoder to be running all the time, then have the other components run and stop as needed.

Ideally we want to support 4K60 on the HDMI output, while GUI & Transcoding would be (downscaled to) 1080P60

Firstly I'm looking to find out if this is even possible / plausible. Secondly I'd appreciate some advice on which gstreamer components to use and what documentation to read up on

Thanks in advance,

/Otto

Re: Viewing Gstreamer video on HDMI, LCD while Transcoding on i.MX8M Plus

igorpadykov — Thu, 02 Sep 2021 23:40:09 GMT

Hi Otto

in general such decoding and transcoding is possible, as for HDMI it is limited to

3840x2160p30 as described in sect.1.4.2.12 Display Interfaces

i.MX 8M Plus Applications Processor Reference Manual

>some advice on which gstreamer components to use and what documentation to read up on

one can look at Chapter 7 Multimedia i.MX Linux User’s Guide

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX-8-GStreamer-User-Guide/ta-p/1098942

Best regards
igor

Re: Viewing Gstreamer video on HDMI, LCD while Transcoding on i.MX8M Plus

ottob — Thu, 02 Sep 2021 23:52:27 GMT

Thanks Igor !

4K30 on the HDMI is acceptable.

Using "tee" on raw video works ? I would that's quite difficult to support with the DMA involved etc

Re: Viewing Gstreamer video on HDMI, LCD while Transcoding on i.MX8M Plus

igorpadykov — Fri, 03 Sep 2021 06:16:26 GMT

yes tee is supported.

Best regards
igor