<div dir="ltr"><div><div><div>Hi. </div>What are you using to play the stream on the iPad? Software/setup ? </div>Regards </div>Peter </div><div class="gmail_extra"> <div class="gmail_quote">On Thu, Nov 3, 2016 at 3:11 PM, kingalione <<a href="mailto:ali.karadag@chronext.com" target="_blank">ali.karadag@chronext.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello, I'm very new in gstreamer and have a problem: I'm using gstreamer to stream a h264 encoded udp stream to an iPad. It works but there is one big problem. The stream is way to laggy. I mean if I do something in front of the camera, I see it on the iPad after 3-6 Seconds which is way to much. this is how my pipeline looks: sudo gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw, width=3072,height=2048,framerate=15/1 ! videoconvert ! queue ! videoscale ! video/x-raw, width=600,height=450,framerate=15/1 ! x264enc tune=zerolatency speed-preset=ultrafast bitrate=500 ! queue ! rtph264pay config-interval=2 pt=96 ! udpsink host=192.168.178.141 port=5000 The camera is plugged-in to a intel nuc celeron and if I run the pipeline I get about 80% processor usage on both cores. I use this camera to stream: sudo v4l2-ctl --all Driver Info (not using libv4l2): Driver name : uvcvideo Card type : DFK 33UX178 Bus info : usb-0000:00:14.0-1 Driver version: 3.16.7 Capabilities : 0x84000001 Video Capture Streaming Device Capabilities Device Caps : 0x04000001 Video Capture Streaming Priority: 2 Video input : 0 (Camera 1: ok) Format Video Capture: Width/Height : 3072/2048 Pixel Format : 'YUYV' Field : None Bytes per Line: 6144 Size Image : 12582912 Colorspace : Unknown (00000000) Crop Capability Video Capture: Bounds : Left 0, Top 0, Width 3072, Height 2048 Default : Left 0, Top 0, Width 3072, Height 2048 Pixel Aspect: 1/1 Streaming Parameters Video Capture: Capabilities : timeperframe Frames per second: 15.000 (15/1) Read buffers : 0 brightness (int) : min=0 max=4095 step=1 default=200 value=333 saturation (int) : min=0 max=255 step=1 default=64 value=240 hue (int) : min=-180 max=180 step=1 default=0 value=0 white_balance_component_auto (bool) : default=1 value=0 white_balance_red_component (int) : min=0 max=255 step=1 default=64 value=112 white_balance_blue_component (int) : min=0 max=255 step=1 default=64 value=136 gamma (int) : min=1 max=500 step=1 default=100 value=100 gain (int) : min=0 max=480 step=1 default=0 value=0 exposure_time_us (int) : min=20 max=60000000 step=1 default=333 value=50000 auto_shutter (bool) : default=1 value=0 auto_exposure_reference (int) : min=0 max=255 step=1 default=128 value=128 gain_auto (bool) : default=1 value=0 trigger_mode (bool) : default=0 value=0 software_trigger (button) : flags=write-only trigger_delay (int) : min=0 max=1000000 step=1 default=0 value=31 strobe_enable (bool) : default=0 value=0 strobe_polarity (bool) : default=0 value=0 strobe_exposure (bool) : default=1 value=1 strobe_duration (int) : min=0 max=32767 step=1 default=100 value=100 strobe_delay (int) : min=0 max=32767 step=1 default=0 value=0 gpout (bool) : default=0 value=0 gpin (bool) : default=0 value=0 roi_offset_x (int) : min=0 max=2816 step=4 default=0 value=0 roi_offset_y (int) : min=0 max=2044 step=4 default=0 value=0 roi_auto_center (bool) : default=1 value=1 trigger_polarity (menu) : min=0 max=1 default=0 value=1 trigger_burst_count (int) : min=1 max=1000 step=1 default=1 value=1 trigger_debounce_time_us (int) : min=0 max=1000000 step=1 default=0 value=0 trigger_mask_time_us (int) : min=0 max=1000000 step=1 default=0 value=0 trigger_noise_supression_time (int) : min=0 max=1000000 step=1 default=0 value=0 auto_functions_roi_control (bool) : default=1 value=1 auto_functions_roi_left (int) : min=0 max=3056 step=1 default=0 value=768 auto_functions_roi_top (int) : min=0 max=2032 step=1 default=0 value=512 auto_functions_roi_width (int) : min=16 max=3072 step=1 default=0 value=1536 auto_functions_roi_height (int) : min=16 max=2048 step=1 default=0 value=1024 whitebalance_mode (menu) : min=0 max=1 default=0 value=0 white_balance_auto_preset (menu) : min=0 max=4 default=0 value=0 white_balance_green_component (int) : min=0 max=255 step=1 default=64 value=64 whitebalance_temperature_preset (menu) : min=0 max=8 default=6500 value=4 white_balance_temperature (int) : min=2500 max=10000 step=100 default=6500 value=4000 flip_horizontal (bool) : default=0 value=0 exposure_auto_upper_limit_auto (bool) : default=1 value=0 exposure_auto_upper_limit (int) : min=20 max=1000000 step=1 default=333 value=50000 So what is the problem here to get a smooth live stream? I tried to play a bit with the framerates up and down but got no significant difference on the lagging time. -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Gstreamer-h264-udp-stream-is-to-laggy-tp4680421.html" rel="noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/Gstreamer-h264-udp-stream-is-to-laggy-tp4680421.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" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> </div>