https://community.nxp.com/t5/i-MX-Processors/Latency-between-CSI-camera-capture-to-DSI-display/m-p/1264304#M172820 <P>Hello,</P><P>I am working on i.MX8M Plus EVK. My purpose it to capture image/video from CSI camera and display it to DSI.</P><P>Our requirement is low latency between CSI camera capture to DSI display.</P><P>We tried with both Android (imx-android-11.0.0_1.2.0) and Linux (imx-5.4.70-2.3.0) BSPs</P><P>In android we use default camera application, where we see ~75 msec latency from actual source which is captured by camera and DSI display.</P><P>However, in Linux we use gst-launch-1.0 command, where we tried with different sinks (i.e autovideosink, glimagesink, waylandsink) in each case we<BR />see around ~130-150 msec.</P><P>we tried below command, in all the cases we got almost similar latency (~130-150 msec)<BR />gst-launch-1.0 v4l2src device=/dev/video1 ! 'video/x-raw,framerate=(fraction)30/1' ! autovideosink<BR />gst-launch-1.0 v4l2src device=/dev/video1 ! 'video/x-raw,framerate=(fraction)30/1' ! waylandsink<BR />gst-launch-1.0 v4l2src device=/dev/video1 ! 'video/x-raw,width=720,height=480,framerate=(fraction)30/1' ! glimagesink render-rectangle='&lt;0,0,1280,720&gt;'</P><P>To use DSI in linux we are using imx8mp-evk-rm67191.dtb. We are using NXP MIPI CSI Camera module and NXP MX8-DSI-OLED1 .</P><P>We thought that Linux would have lower overhead than android so latency would be less. But in actual that doesn't seems so.</P><P>Can you clarify, why there is higher latency in Linux use case then android?</P><P>Regards,</P><P>Darshak</P> Mon, 19 Apr 2021 11:24:05 GMT darsh_dev 2021-04-19T11:24:05Z https://community.nxp.com/t5/i-MX-Processors/Latency-between-CSI-camera-capture-to-DSI-display/m-p/1264304#M172820 <P>Hello,</P><P>I am working on i.MX8M Plus EVK. My purpose it to capture image/video from CSI camera and display it to DSI.</P><P>Our requirement is low latency between CSI camera capture to DSI display.</P><P>We tried with both Android (imx-android-11.0.0_1.2.0) and Linux (imx-5.4.70-2.3.0) BSPs</P><P>In android we use default camera application, where we see ~75 msec latency from actual source which is captured by camera and DSI display.</P><P>However, in Linux we use gst-launch-1.0 command, where we tried with different sinks (i.e autovideosink, glimagesink, waylandsink) in each case we<BR />see around ~130-150 msec.</P><P>we tried below command, in all the cases we got almost similar latency (~130-150 msec)<BR />gst-launch-1.0 v4l2src device=/dev/video1 ! 'video/x-raw,framerate=(fraction)30/1' ! autovideosink<BR />gst-launch-1.0 v4l2src device=/dev/video1 ! 'video/x-raw,framerate=(fraction)30/1' ! waylandsink<BR />gst-launch-1.0 v4l2src device=/dev/video1 ! 'video/x-raw,width=720,height=480,framerate=(fraction)30/1' ! glimagesink render-rectangle='&lt;0,0,1280,720&gt;'</P><P>To use DSI in linux we are using imx8mp-evk-rm67191.dtb. We are using NXP MIPI CSI Camera module and NXP MX8-DSI-OLED1 .</P><P>We thought that Linux would have lower overhead than android so latency would be less. But in actual that doesn't seems so.</P><P>Can you clarify, why there is higher latency in Linux use case then android?</P><P>Regards,</P><P>Darshak</P> Mon, 19 Apr 2021 11:24:05 GMT https://community.nxp.com/t5/i-MX-Processors/Latency-between-CSI-camera-capture-to-DSI-display/m-p/1264304#M172820 darsh_dev 2021-04-19T11:24:05Z https://community.nxp.com/t5/i-MX-Processors/Latency-between-CSI-camera-capture-to-DSI-display/m-p/1268904#M173288 <P>Hello darshak_patel,</P> <P>The latency should be due to the framework, you can try with GSTLatencytracer to determines src-to-sink latencies by injecting custom events at sources and process them at sinks.</P> <P>Also You can also use gst-stats-1.0 to parse the generated log file and get some stats/metrics about the latency.</P> <P>Regards</P> <P>&nbsp;</P> Tue, 27 Apr 2021 13:12:56 GMT https://community.nxp.com/t5/i-MX-Processors/Latency-between-CSI-camera-capture-to-DSI-display/m-p/1268904#M173288 Bio_TICFSL 2021-04-27T13:12:56Z