Hans Verkuil wrote: > Have you tried changing this: > itv->stream_buf_size[IVTV_ENC_STREAM_TYPE_MPG] = 0x08000; > > to this: > > itv->stream_buf_size[IVTV_ENC_STREAM_TYPE_MPG] = 0x10000; > > in ivtv-driver.c? Does this also trigger lockups? > > This change prevents scatter-gather DMA, just in case that is the cause I've already locked up 6 cards in the past couple of minutes by setting the latency down to 1. I'll leave it running with a normal latency overnight and see how it performs, to see if its better in normal conditions.
> If you capture raw YUV from /dev/video32, do you also get DMA timeouts? > Will try tomorrow. > 1 MB? That's dubious. The largest transfer should be of an I-Frame, > which you can compare to a jpeg of a single PAL frame. Should > definitely be less than 1 MB. Could be a knock-on effect of a DMA > engine breakdown. > I'll try to capture some logging tomorrow showing it and mail it to you off-list. Regards, Mark Bryars -- Mark Bryars Product Development Engineer ETV Interactive Ltd Logie Court Stirling University Innovation Park Stirling Scotland, UK FK9 4NF T: +44 (0) 1786 455150 F: +44 (0) 1786 455179 W: www.etvinteractive.com _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
