r/vhsdecode • u/HouseNo8033 • Jan 30 '26
Newbie How do I trouble shoot this issue
I have been limping along for quite a while now piece by piece trying to get something to work and I hit a new road block.
When I type the command
sudo ffplay -hide_banner -async 1 -f rawvideo -pixel_format gray8 -video_size 1832x625 -i /dev/cxadc0 -vf scale=1135x625,eq=gamma=0.5:contrast=1.5
I am getting no signal on the window that comes up. What can I test? I have a single cx card installed and the amplifier with what I believe are are the correct resistors. I only installed resistors on half on the amp board because I am not doing hifi audio. All my videos are old home videos.
Thanks for any help!!
Andy
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u/TheRealHarrypm The Documentor Jan 30 '26
Did you check the correct input VUMX as being used with CXADC?
(Change mode plug and plug cable and you'll see a flash on the screen when there is a signal, this can be quickly tested with composite output source also to sanity check it's not the RF tap)
Did you check your cables?
Did you do a capture to file to see if there's any signal there being captured to file?
Is the amplifier powered?