local rtsp server video show delay 7+ seconds

[Dengke Du]

On 2018年10月09日 07:31, Nicolas Dufresne wrote:
>
>
> Le lun. 8 oct. 2018 05 h 27, Dengke Du <dengke.du at windriver.com 
> <mailto:dengke.du at windriver.com>> a écrit :
>
>     Hi all
>
>     gst-launch-1.0 --version
>
>          gst-launch-1.0 version 1.14.2
>          GStreamer 1.14.2
>          Unknown package origin
>
>     My device info: v4l2-ctl --list-formats
>
>     ioctl: VIDIOC_ENUM_FMT
>          Index       : 0
>          Type        : Video Capture
>          Pixel Format: 'YUYV'
>          Name        : YUYV 4:2:2
>
>          Index       : 1
>          Type        : Video Capture
>          Pixel Format: 'MJPG' (compressed)
>          Name        : Motion-JPEG
>
>     Server side:
>
>          In rtsp examples directory: ./test-launch "( v4l2src !
>     image/jpeg !
>     jpegdec ! x264enc ! rtph264pay name=pay0 pt=96 )"
>
>
> Default x264 settings are high latency. Try with setting 
> tune=zerolatency. That will drop the latency to around two sec. 2s is 
> the configured latency on the rtspsrc element. You can reconfigure 
> that using the playbin callbacks, or child proxy mechanism.

Thanks!
1. After adding "tune=zerolatency" drop the latency 2-3s
2. Using the following instead of playbin drop the latency 4-5s:
     gst-launch-1.0 rtspsrc location="rtsp://127.0.0.1:8554/test" 
latency=0 ! rtph264depay ! decodebin ! videoconvert ! ximagesink
>
>
>
>     Client side:
>
>          gst-launch-1.0 -v playbin uri=rtsp://127.0.0.1:8554/test
>     <http://127.0.0.1:8554/test>
>
>     The video show delay 7+ seconds, does somebody know why?
>
>     Thanks!
>
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