I am implementing a video capture driver for one of our camcorders through its USB interface. I have to capture data through isochronous endpoints (Maxpkt size = 500) in Linux kernel 2.4.20-8. I am allocating URB with usb_alloc_urb(num_of_pkts), where num_of_pkts = 80, initializing the iso frame descriptors and submitting these URB's. In the completion handler the urb->iso_frame_desc[i].status returned is zero which is fine, but it returns urb->iso_frame_desc[i].actual_length also as zero in all the frames. Can any one tell me what may be the reason for this and also the possible solution?
thanks and regards Ramprasad
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