[gst-devel] long pauses during rtsp playback

[Ron McOuat]

  On the Axis Setup under Video and Image the MPEG4 section should have 
a setting called GOV which I believe is the ratio of I frames to P 
frames in the stream. On the lower end cameras the GOV can default to as 
high as 128 so it can take a while before you see an I frame in the 
stream to get the first complete frame. That might be what is causing 
the long startup delays. Is your stream the only stream being pulled 
from the camera? If your stream is in parallel with another I believe 
you join a live stream in progress inside the camera. It is worth a try 
to change this setting to see if that changes the startup time.

I would also look at the Simple vs Advanced profile. They are standard 
profiles according to the standards bodies but I know Quicktime won't 
play the Advanced profile. I haven't used the MP4 streams from Rev 4 
Axis cameras with gstreamer much. Maybe I am stating the obvious but it 
looks like something has a problem processing the timing headers. Very 
odd. I have only looked at the stream on Linux systems which also works 
fine for you reading earlier posts.

On 10-10-18 11:09 AM, Doug Crawford wrote:
> I tried setting the framerate on the AXIS video server to 5 fps, but have the
> same bursty video.  The only difference is now after I run the gstreamer
> rtsp client on my OMAP3EVM there is an even longer pause of around 60
> seconds until I see the first frame.  If I set the AXIS server to 30 fps
> then the delay is about 12 seconds before I see the first frame.  Also, the
> pause between bursts is more or less proportional to the framerate: 2-3
> second at 30fps, 8-10 seconds at 5fps.
>
> I have been able to successfully play regular mpeg4 and h.264 video files
> using the same TIDmaiVideoSink.  For example this pipeline displays a ntsc_1
> video just fine: gst-launch --gst-debug=2 filesrc
> location=/opt/davincieffect_ntsc_1.m4v ! TIViddec2 codecName=mpeg4dec
> engineName=codecServer ! TIDmaiVideoSink videoStd=VGA videoOutput=LCD
> rotation=90 sync=false.
>
> I am building the gstreamer framework using the TI Arago project targeting
> the OMAP3EVM evaluation board.