Hello, I have modified the 5dpo example (http://sourceforge.net/p/sdpo-cl/) to work with v4l2_pix_format set to V4L2_FIELD_ALTERNATE. With a pci grabber card and corresponding driver bttv I get 50 fields per second. Fine, great! I then plugged a usb grabber (2040:c200 Hauppauge, module is cx231xx) and retried the same expriment and it only provides 25 (fields/frames) per second. Same with a ( saa7115 8-0025: saa7113 found @ 0x4a em2860 ). What do these usb grabbers do fundamentally different? Can't they provide every single field? What would be a good starting point for further investigation? I have looked through media_tree.git/tree/drivers/media/usb/cx231xx/cx231xx-video.c but did not find any clue, as I'm not really into c. Advice appreciated! Regards, Max -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
