HDMI input HAT via SPI feasibility - Raspberry Pi Forums
so, i've been toying project idea thinking various ways might done , wondering feasibility.
1 of core bits of functionality take 1 or more dp/dvi/hdmi video connections , them pi. there plenty of ways *analog* video capture devices connected via usb, digital video capture devices tend far more expensive. moreover, want less clunky external usb dongle. there folks out there have tried via csi , understand it, hasn't work out because pi's csi expecting camera, not clean digital video.
in more general sense then, i'm looking way take dp/dvi/hdmi video in, encode h.264, , send pi via on 40-pin header. spi seems choice. i'm not sure how feasible is.
can tell, 1080p30, encoded h.264 going take on order of 8 mbps @ reasonable quality. should fit within range of pi's spi capabilities appear (if i'm reading correctly) able handle 32 mhz. might possible handle multiple such streams simultaneously.
there's more fundamental question of how go finding encoder can spit out stream on spi without jumping full on soc (like geo semiconductor max64380) makes pi sort of redundant, hey...
seem doable?
1 of core bits of functionality take 1 or more dp/dvi/hdmi video connections , them pi. there plenty of ways *analog* video capture devices connected via usb, digital video capture devices tend far more expensive. moreover, want less clunky external usb dongle. there folks out there have tried via csi , understand it, hasn't work out because pi's csi expecting camera, not clean digital video.
in more general sense then, i'm looking way take dp/dvi/hdmi video in, encode h.264, , send pi via on 40-pin header. spi seems choice. i'm not sure how feasible is.
can tell, 1080p30, encoded h.264 going take on order of 8 mbps @ reasonable quality. should fit within range of pi's spi capabilities appear (if i'm reading correctly) able handle 32 mhz. might possible handle multiple such streams simultaneously.
there's more fundamental question of how go finding encoder can spit out stream on spi without jumping full on soc (like geo semiconductor max64380) makes pi sort of redundant, hey...
seem doable?
the hdmi csi2 route work - i've got prototype works fine. requires change firmware. , in likelihood, firmware changes needed doing via spi, if possible. , firmware closed source..
raspberrypi
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