Le 2016-06-14 17:11, "lucas.kinion" <<a href="mailto:lucas.s.kinion@nasa.gov">lucas.s.kinion@nasa.gov</a>> a écrit : > > Hi, > > I'm trying to write some test code that inserts video data into a pipeline > from a USB camera that is not V4L2 compatible, and instead uses its own API. > I've attached my code. I'm wondering if there's a way my code needs to be > optimized to increase performance, or if I am being processor limited. I am > using a TI Sitara AM5728 based single board computer, which has a hardware > encoder capable of 1080p@60fps, and a USB 3.0 camera which is also capable > of 1080p@60fps. I am currently only achieving 1080p@15fps. > > The code does the following: > Initialize the pipeline, elements, and caps > kick off a thread that pulls UYVY video frames from the camera into an array > connects cb_need_data to the appsrc so that another thread can pull frames > from the array into the pipeline. > > The pipeline looks like this, and seems to be working: > appsrc [caps] ! videoconvert ! [caps] ! ducatih264enc ! h264parse ! > rtph264pay ! udpsink > And on the other machine I receive the UDP stream through VLC using an SDP > file. > When having performance issues, try to avoid conversion or copies. Don't you have a hw color converter on this platform? Are you sure you are not copying frames in your proprietary stack? > The code works, but I believe it is slow. The max framerate it can push into > the pipeline is ~15fps when the camera is set to 1920x1080 resolution. At > lower resolutions, it can handle 30fps without issue. Is there some obvious > way I am missing to optimize my code so that it can handle 1080p@30fps or > 60fps, as my camera and hardware encoder support? Or am I just being limited > by something else? > > I'm mainly looking at the cb_need_data for optimizations. Some basic > profiling leads me to believe that it is spending a lot of time on > gst_app_src_push_buffer, but I don't know of any way to optimize this > function. Is there something I'm missing? > > Thank you > Lucas Kinion > > pixelink_test.cpp > <<a href="http://gstreamer-devel.966125.n4.nabble.com/file/n4678040/pixelink_test.cpp">http://gstreamer-devel.966125.n4.nabble.com/file/n4678040/pixelink_test.cpp</a>> > > > > -- > View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Appsrc-video-performance-optimization-tp4678040.html">http://gstreamer-devel.966125.n4.nabble.com/Appsrc-video-performance-optimization-tp4678040.html</a> > Sent from the GStreamer-devel mailing list archive at Nabble.com. > _______________________________________________ > gstreamer-devel mailing list > <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> > <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a>