Regarding frame drops

[Shilpa Chandrappa]

Hi,

I am receiving an rtsp stream and saving in h264 format. I need to check if
there was any frame drops in this process, So I enabled qos in filesink
pipeline and enabled logs using command "gst-launch-0.10 rtspsrc
location=rtsp://XYZ ! rtph264depay ! filesink location=video.264 qos=true
--gst-debug=GST_QOS:5"

Below logs were generated when I run the command.

0:00:38.044612357  1965 0x2b71e8f0 DEBUG                GST_QOS
/home/developer/Yocto-1.4/build/tmp/work/armv7a-vfp-neon-poky-linux-gn
ueabi/gstreamer/0.10.36-r2/gstreamer-0.10.36/libs/gst/base/gstbasesink.c:2721:gst_base_sink_perform_qos:<filesink0>
avg_duration: 0:00
:00.038556718, avg_pt: 0:00:00.029106758, avg_rate: 0.955763
0:00:38.044677584  1965 0x2b71e8f0 DEBUG                GST_QOS
/home/developer/Yocto-1.4/build/tmp/work/armv7a-vfp-neon-poky-linux-gn
ueabi/gstreamer/0.10.36-r2/gstreamer-0.10.36/libs/gst/base/gstbasesink.c:2756:gst_base_sink_perform_qos:<filesink0>
updated: avg_durat
ion: 0:00:00.038178289, avg_pt: 0:00:00.029536067, avg_rate: 0.94438
0:00:38.376289675  1965 0x2b71e8f0 DEBUG                GST_QOS
/home/developer/Yocto-1.4/build/tmp/work/armv7a-vfp-neon-poky-linux-gn
ueabi/gstreamer/0.10.36-r2/gstreamer-0.10.36/libs/gst/base/gstbasesink.c:2644:gst_base_sink_send_qos:<filesink0>
qos: type 0, proporti
on: 0.944380, diff 0, timestamp 0:00:07.425346814
0:00:38.376447993  1965 0x2b71e8f0 DEBUG                GST_QOS
/home/developer/Yocto-1.4/build/tmp/work/armv7a-vfp-neon-poky-linux-gn
ueabi/gstreamer/0.10.36-r2/gstreamer-0.10.36/libs/gst/base/gstbasesrc.c:1733:gst_base_src_update_qos:<udpsrc0>
qos: proportion: 0.9443
80, diff 0, timestamp 0:00:07.425346814
0:00:38.378319084  1965 0x2b71e8f0 DEBUG                GST_QOS
/home/developer/Yocto-1.4/build/tmp/work/armv7a-vfp-neon-poky-linux-gn
ueabi/gstreamer/0.10.36-r2/gstreamer-0.10.36/libs/gst/base/gstbasesink.c:2939:gst_base_sink_do_render_stats:<filesink0>
avg_render: 0:
00:00.000391919
0:00:38.378393857  1965 0x2b71e8f0 DEBUG                GST_QOS
/home/developer/Yocto-1.4/build/tmp/work/armv7a-vfp-neon-poky-linux-gn
ueabi/gstreamer/0.10.36-r2/gstreamer-0.10.36/libs/gst/base/gstbasesink.c:2716:gst_base_sink_perform_qos:<filesink0>
start: 0:00:07.459
*030752, stop 0:00:07.459030752, entered 0:00:07.459030752, left
0:00:07.459030752, pt: 0:00:00.033683938, duration 0:00:00.035298620,jitter
0*


I am observing jitter value as 0 throughout. Is Jitter value '0' means no
frame drops ?  

I would like to know is this the way to check framedrops or is there any
other mechanism.

Thanks,
Shilpa Chandrappa



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