can't set PAL?

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I am porting an app to linux and I cant' capture images.
 
Firstly, on testing the card (miro PCTV) with XSane and XScanimage on my RedHat 7 system, I can find nothing to select the input channel or PAL/NTSC and it seems that NTSC is selected. Are there any installed utilities for V4L on the linux release?
 
Secondly, in my program, which compiles ok, and opens the device and sets channel 1 and RGB 24 alll without error returns, the call to read the video data (read(...)) does not exit. Any ideas?
 
Thanks
 
Ivor Cox
 

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