Gstreamer streaming issue / succession of short freezings -> laggy video

ranger inforom73 at
Fri Aug 4 13:19:51 UTC 2017

I'm using Gstreamer to stream video shot with a digital camera with a phone
through a server to a PC app.■ About the hard configuration:Windows PC and
Android are connected through LAN. Android connects  WiFi to router.  PC
connects thorugh wire to router.■  Programs installed:- On PC:  1. A
streaming server app.      2. Gstreamer player      3. A user program that
connects to the server, and uses the player (Gstreamer); it has a GUI and
can display the streamed video in full screen.- On Android: the streaming
app. It sends mjpeg stream through LAN to the server program on PC.  ■ 
Camera streams video to LAN.  Android app connects to camera, captures the
video streamed by the camera and re-streams it to a server app installed on
PC.The server sends video to a program installed on same PC, which displays
it.■  Technology used: - Streamed data format is movie jpeg (this is the
only one that cannot be changed).- Streaming protocol is RTSP over UDP.■ 
Gstreamer command is: -v udpsrc
caps="application/x-rtp,encoding-name=JPEG,payload=26" port=6000 !
rtpjpegdepay ! jpegdec ! videoconvert ! queue !  x264enc ! rtph264pay
config-interval=10 pt=96 ! udpsink host= port=5000 sync=false and
configuration for VLC in SDP file: v=0 m=video 5000 RTP/AVP 96 c=IN IP4 a=rtpmap:96 JPEG/90000■  The problem is that streaming is far from
being smooth; I get freezings on both Android and PC. There is a succession
of these short freezings/unfreezings, sometimes PC/Android in the same time
and sometime unrelated.I shot a movie with the screens of both PC and
Android, it can be downloaded from
here: assume
some packets may be lost or order is not kept right.Any hint how this issue
should be corrected? I welcome any suggestions about where I should look
into and how to deal with this.Thanks.

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