AW: Difficulty getting a good example of the RTSP server running under Windows

[Thornton, Keith]

Hi, I have a streaming Server running on windows which is based on appsrc. It Works well. I also use the Intel Media SDK Encoder. I am currently using the msdkh264enc Plugin which is part of the 1.15 and 1.16 release. The problems you are seeing are client side problems. If you use a gstreamer based client, the stuttering at the start doesn’t occur. The black screen may be due to the client throwing the frames away because they are past the presentation time. Check this by turning the VLC messages to level 2 and by using wireshark to observe the arrival of the frames on the client side.
Gruesse

Von: gstreamer-devel <gstreamer-devel-bounces at lists.freedesktop.org> Im Auftrag von Ben Rush
Gesendet: Montag, 15. April 2019 05:45
An: Discussion of the development of and with GStreamer <gstreamer-devel at lists.freedesktop.org>
Betreff: Difficulty getting a good example of the RTSP server running under Windows

I'm trying to find a good starting point upon which to develop an RTSP streaming server application using GStreamer and RTSP on Windows. I've installed GStreamer as per these instructions: https://gstreamer.freedesktop.org/documentation/installing/on-windows.html, however, the samples specific to the RTSP server thus far haven't worked very well, and I'm wondering if others have any input/experience.

First, this example:  https://github.com/GStreamer/gst-rtsp-server/blob/master/examples/test-appsrc.c builds and runs, but the output (at least when viewed over VLC) is just a black screen. The client connects, and the scrubber shows time moving forward, but the video is black. Examining the code, it appears it ought to alternate between black and white, but it does not.

If I adapt that example to use videotestsrc as the video source, setting the string parameter of gst_rtsp_media_factory_set_launch to "( videotestsrc is-live=true ! videoconvert ! x264enc tune=zerolatency speed-preset=veryfast ! rtph264pay name=pay0 pt=96 )", I get the "color bars" and white noise video, but it stutters for a second or two, and then pauses for exactly ten seconds and then starts to play normally. I use the x264 encoder in the Live555 streaming server, and with similar parameters, I get no stutter in playback. I have to believe this is an encoder setting and not a failure of the RTSP server, but adjusting different parameters doesn't seem to impact this stutter. Obviously, in our production environment, we cannot have this kind of stutter.

Finally, I have been completely unable to get any of the Intel Media SDK to work, specifically their x264 encoder, and I'm curious if anyone has any experience there either. I know this isn't a group specific to these plugins, but perhaps someone has experience with these plugins. I opened the following issue on their repo: https://github.com/intel/gstreamer-media-SDK/issues/169, but thus far haven't heard anything.

I think what I'm looking for is just feedback to these issues so I can build confidence this will work on Windows. I haven't tried these particular examples on Linux, but on a couple of occasions, I've had a lot more luck getting GStreamer samples running as advertised under Ubuntu than Windows. I need them to run on Windows.

Any feedback would be appreciated. Thanks a bunch for your time.
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