How to view FPS of received RTSP stream
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How to view FPS of received RTSP stream
 
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Hi all,
Here's my gstreamer receiver pipeline: gst-launch-1.0 rtspsrc location= rtsp://10.20.13.24:8554/test name=r latency=0 ! rtph264depay ! avdec_h264 ! fpsdisplaysink name=fpssink text-overlay=false video-sink=xvimagesink signal-fps-measurements=true
When I launch this pipeline, I receive the rtp stream, but it appears in a normal window, i.e, like an xvimagesink. I cannot see any frame rate counter or indicator. What do I need to change?
Thanks, -Aswin _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: How to view FPS of received RTSP stream
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On Wed, Jun 15, 2016 at 12:54 PM, Sankar,Aswin Pranav <[hidden email]> wrote:
> Hi all, > > > Here's my gstreamer receiver pipeline: gst-launch-1.0 rtspsrc location= > rtsp://10.20.13.24:8554/test name=r latency=0 ! rtph264depay ! avdec_h264 ! > fpsdisplaysink name=fpssink text-overlay=false video-sink=xvimagesink > signal-fps-measurements=true > > > When I launch this pipeline, I receive the rtp stream, but it appears in a > normal window, i.e, like an xvimagesink. I cannot see any frame rate counter > or indicator. What do I need to change? > If you add -v at the end of the pipeline you will get the information you want in the terminal. If you want a text overlay, then you first need to set text-overlay=true and for that to work you need the "textoverlay" element which is not built if you don't have pango development files installed. Aleix _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: How to view FPS of received RTSP stream
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In reply to this post by Sankar,Aswin Pranav
You have disabled the overlay, so the information will be posted as application message. Implement a bus handler to receive those. With gst-launch you can add the -m parameter to trace messages. > _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: How to view FPS of received RTSP stream
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Thanks for the input guys, but now my problem is: When my receiver pipeline is simply " gst-launch-1.0 rtspsrc location= rtsp://10.20.13.24:8554/test name=r latency=0 ! rtph264depay ! avdec_h264 ! xvimagesink sync=0" it *appears* that my video is almost-realtime (150 ms latency between server and client using a stopwatch) and is rendering smoothly at 30 fps (this value was set at the server source). But then when I modify my pipeline to this: "gst-launch-1.0 rtspsrc location= rtsp://10.20.13.24:8554/test name=r latency=0 ! rtph264depay ! avdec_h264 ! fpsdisplaysink name=fpssink video-sink=xvimagesink sync=0 -v" I get considerable latency between server and client (almost 5 seconds), the video visibly stutters, and the frame rate comes up to an average of 18 ms with 0 dropped frames. When I set sync=1, all hell breaks loose and I get a drop rate of 30 fps (on avg)! I get maximum frame rendered per second . What is going on?! Does fpsdisplaysink influence the speed of my receiver pipeline in some manner? What can I do about it? Is there a lower overhead way of checking fps? Thanks. On Wed, 15 Jun 2016 at 19:37 Nicolas Dufresne <[hidden email]> wrote:
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Re: How to view FPS of received RTSP stream
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By setting rtspsrc latency to 0 you prevent the jitterbuffer from doing its job, so you most likely have weird timestamp.. So forget about sync=1 unless you increase the latency. Now, you should set the sync= on fpsdidplaysink, it will take care of the internal a sink. Overlay are expensive, for high resolution it could be too slow. > _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: How to view FPS of received RTSP stream
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Hey Nicolas, Thanks for your advice, but I have a couple of follow-up questions based on my observations. 1) You were right, it was text-overlay = true (on a near-4K stream) that was causing the near 5 s lag. However, even on this pipeline: gst-launch-1.0 rtspsrc location= rtsp://10.20.12.191:8554/test name=r latency=0 ! rtph264depay ! avdec_h264 ! fpsdisplaysink name=fpssink text-overlay=true video-sink=xvimagesink sync=0 -v => I get results like this: /GstPipeline:pipeline0/GstFPSDisplaySink:fpssink: last-message = rendered: 334, dropped: 0, current: 18.77, average: 19.07 Note that I am attempting to stream 30 fps video from source. If I average a frame rate of 19 fps, where are the other frames? For sure they don't show up under dropped, and I have latency = 0 (no jitterbuffer). However, with the above pipeline but text-overlay= false, I get near-realtime stream with results like this: /GstPipeline:pipeline0/GstFPSDisplaySink:fpssink: last-message = rendered: 1234, dropped: 0, current: 30.68, average: 29.76 However, with sync=1, I *seem* to get a near realtime stream without any dropped frames, but here is the log from the shell: /GstPipeline:pipeline0/GstFPSDisplaySink:fpssink: last-message = rendered: 5, dropped: 5021, fps: 0.00, drop rate: 30.89 This log seems to update once every half-second, with about increase of 15 in the 'dropped' parameter. I know I am probably beating around the bush, but what's going on here? Which of these reflects the 'true' FPS? Is there anything else I can do about measuring the actual FPS? You mentioned something about a weird timestamp, what can I do about it? Thanks, -Aswin On Thu, 16 Jun 2016 at 18:32 Nicolas Dufresne <[hidden email]> wrote:
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