I have an RPi3 feeding a broadcast SDI video converter via HDMI at 480x720@59.94hz (SDTV). This is set in the GUI under PREFERENCES, SCREEN CONFIGURATION. This setup does work if I plug a 480x720 capable flat screen into the Pi and boot up. The Pi first boots up in a higher computer resolution but I can then switch the Pi to 480x720@59.94, then plug in the SDI converter and it works. However the Pi EDID is causing an issue and I need to disable it.
The SDI converter does not report EDID until it sees valid SMPTE digital video. But when the Pi boots up, it sees no EDID and defaults to a computer resolution which SMPTE SDI does not support and therefore the converter does not produce an output.
I need the RPi3 hard set to 480x720@59.94 no matter what.
I realize the risk of not having access to a 480x720 HDMI flatscreen and bricking the Pi. But to get around that if it ever happens I will have another SD card which has EDID enabled.
TIA
The SDI converter does not report EDID until it sees valid SMPTE digital video. But when the Pi boots up, it sees no EDID and defaults to a computer resolution which SMPTE SDI does not support and therefore the converter does not produce an output.
I need the RPi3 hard set to 480x720@59.94 no matter what.
I realize the risk of not having access to a 480x720 HDMI flatscreen and bricking the Pi. But to get around that if it ever happens I will have another SD card which has EDID enabled.
TIA
Statistics: Posted by hdtv101 — Wed Dec 03, 2025 5:31 am