CODEWITHSUNDEEP
benchmarkingcpu-usagegstreamervlc
Saurabh Gandhi
Saurabh Gandhi

Reputation: 361

Difference in CPU & memory utilization while using VLC Mozilla plugin and VLC player for playback of RTSP streams

For one of our ongoing projects we were planning to use some multimedia framework like VLC / Gstreamer to capture and playback / render h.264 encoded rtsp streams. For the same we have been observing the performance (CPU & memory utilization) of VLC using two demo applications that we have built. One of the demo application uses the mozilla vlc plugin using which we have embedded up to four h.264 encoded RTSP streams on a single html webpage while the other demo application simply invoked the vlc player and plays a single h.264 encoded rtsp stream.

I was surprised to observe that the results were as under (Tests were conducted on Ubuntu 11.04):

Demo 2 (Mozilla VLC plugin - 4 parallel streams)

Demo 2 (VLC player - 1 stream)

My question is, why is the CPU utilization lesser for the mozilla VLC plugin even though it is decoding more video streams.

Reply awaited.

Regards,

Saurabh Gandhi

Upvotes: 0

Views: 1080

Answers (2)

CeDeROM
CeDeROM

Reputation: 600

If you have hardware acceleration of some sort, then CPU only takes care of routing the data..

Upvotes: 0

Gregor Pohajač
Gregor Pohajač

Reputation: 1

I'm also using VLC mozilla plugin for my project and I have problem with h264 streams. The only way to handle such stream was to use --ffmpeg-hw (for vaapi use) which due Xlib works only in standalone VLC app (--no-xlib flag in vlcplugin_base.cpp). So I removed that flag and added XInitThreads() and it works now BUT far from performance level you had and besides no-xlib flag was there for reason (it might come to some unwanted behavior).

So the main question is HOW did you come to such results and if its possible to share your configuration flags with me and the rest.

The system I'm using is 4 core CPU and nvidia ION graphics. CPU cores stay at moderate level but stream on fullscreen doesn't play smoothly. If the same streams gets run in cvlc it works perfect. ffmpeg-hw flag is used in both accounts without any warning messages (vaapi successfully returns).

Upvotes: 0

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