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SOM-RK3399 Record HDMI input audio

Posted: Tue Sep 28, 2021 1:03 pm
by sefer
Hi,

I can use gstreamer to record video from hdmi input.
But I can't figure out how can I record audio.

I followed the pdf schematic from wiki page http://wiki.friendlyarm.com/wiki/images/d/de/SOM-RK3399_Dev_Kit_1904_Schematic.pdf

The digital audio signal is linked from TC358749XBG (hdmi input chip) to ALC5651 audio codec at it's second i2s port.
I don't think there is a digital mixer path to send this signal to the processor.
Can anyone confirm if this is correct?

Thank you

Re: SOM-RK3399 Record HDMI input audio

Posted: Mon Nov 01, 2021 9:21 am
by sefer
Not yet,

Maybe this cannot be done on Development Board. The only solution I can think is to design my own board and redirect the signal to an i2s port of the controller.