Hi Stefen,<br><br>This is quite strange. In a v4l2 driver I am testing, if I set the frame buffer state to VIDEOBUF_ERROR instead of VIDEOBUF_DONE when a DMA error is detected, some buffers are lost and never sent back through qbuf ioctl again. If I ignore the error, the driver runs fine. Let me check it again.<br> <br>Thanks!<br>Yiliang<br><br><div class="gmail_quote">On Thu, Mar 25, 2010 at 1:30 PM, Stefan Kost <span dir="ltr"><<a href="mailto:ensonic@hora-obscura.de">ensonic@hora-obscura.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class="im">Am 25.03.2010 11:35, schrieb yiliang:<br> ><br> </div><div class="im">> Hi,<br> ><br> > In gst_v4l2_buffer_pool_dqbuf, if the following system call return a buffer,<br> > but with an error such as -EIO, will v4l2src re-queue the buffer to driver?<br> <br> </div>yes.<br> <font color="#888888"><br> Stefan<br> </font><div class="im">><br> > if (v4l2_ioctl (pool->video_fd, VIDIOC_DQBUF, &buffer) >=0) {<br> > }<br> ><br> > Thanks,<br> > Yiliang<br> ><br> <br> <br> </div><div><div></div><div class="h5">------------------------------------------------------------------------------<br> Download Intel&#174; Parallel Studio Eval<br> Try the new software tools for yourself. Speed compiling, find bugs<br> proactively, and fine-tune applications for parallel performance.<br> See why Intel Parallel Studio got high marks during beta.<br> <a href="http://p.sf.net/sfu/intel-sw-dev" target="_blank">http://p.sf.net/sfu/intel-sw-dev</a><br> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a><br> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a><br> </div></div></blockquote></div><br>