[gst-devel] How to optimize the performance of gstreamer

[Simon Holm Thøgersen]

tor, 14 05 2009 kl. 03:05 -0700, skrev yangsb:
> I am using gstreamer as a rtsp client on my arm-based board.
> My pipeline is as simple as the following :
> #################
> gst-launch-0.10 --gst-debug=0 \
> rtspsrc location=rtsp://192.168.1.55:554/55mbps.mp4 latency=20000 name=s ! \
> rtph264depay ! \
> TIViddec engineName=decode codecName=h264dec ! \
> TIDmaiVideoSink displayStd=fbdev displayDevice=/dev/fb/3 \
> videoStd=D1_NTSC videoOutput=COMPOSITE \
> resizer=FALSE accelFrameCopy=TRUE sync=0 s. ! rtpmp4gdepay ! TIAuddec
> engineName=decode codecName=aachedec ! osssink sync=0
> #################
> When the video bitrate is low , the gstreamer works fine .
> However , when the video bitrate is high , for example , 5Mbps for 720x480
> sized video , 
> I found that the arm load is nearly 99% , and may lose some video frames .
> I tried to add -O3 options for the gcc , things becomes better , but may
> still lose some frames.
> Is there anyother way to optimize the performance of the gstreamer ?  

A good starting point would be to profile your application to see where
the majority of cpu time is used. Post the profile here and we can
probably find some places to tweak.


Simon Holm Thøgersen