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AM572x Ducatih264enc high-422 encoding profile

Lucas Kinion
Prodigy 130 points

Hi,

I have a question about utilizing the high-422 encoding profile capability of Ducatih264enc in a Gstreamer pipeline. I'm using a Compulab AM5728-based board with a Linux version based off of PSDK 2.00.01.

My question is this: the Ducatih264enc element has an option for profile=122 which sets the encoding profile to high-422 (High 4:2:2 Profile). But Ducatih264enc only accepts incoming video data in NV12 format, which as I understand is a 4:2:0 format by definition. Does that mean that encoding with the high-422 profile causes the encoder to interpolate chroma samples, or am I misunderstanding? I'd like to maintain a true 4:2:2 color format throughout my pipeline, as I am currently having to convert YUYV 4:2:2 to NV12 4:2:0 for compatibility with the encoder.

Thank you
Lucas Kinion