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

[Ben Rush]

Keith,

Thanks for your response. So, I just got into the office and have started
working with some of your suggestions. To keep the conversation from
getting confusing, I'll focus in on one problem at a time: the use of the
first example and the appsrc plugin.

So, I was able to get it working using a GStreamer client, as you
suggested. However, playback isn't smooth, which concerns me. I see in the
code we seem to be responsible for setting the timestamp and I'm wondering
if perhaps the example I'm working with just isn't meant to reflect a
production-ready solution. The fact that the presentation time is erratic
from the client side seems to be a good theory as to what's causing my
issues (thanks for that). If that's the case, I'd like to find an example
which does. I made a quick video to show you what I'm experiencing. First,
let me share with you the client command I'm using to play the stream:

.\gst-launch-1.0.exe playbin uri=rtsp://172.17.5.156:8554/test

And again, the code I'm using is exactly the same code as the example.

This is what playback looks like:

https://www.youtube.com/watch?v=46T3TOOI0Lo&feature=youtu.be

If this was a heart monitor for a patient, the patient would have a serious
arrhythmia :)

And I guess the other concern I have is what you meant when you said the
issue is on the client. Ultimately we'll likely be contained to mostly just
Gstreamer code, but we will need to support VLC for debugging purposes too.
Again, though, I think what I'm likely experiencing is the need to be more
mindful of timestamps than I needed to be when using Live555. So, any
example code you're aware of that shows how to smartly send timestamps? Or
perhaps something in my GStreamer plugin pipeline I should add to better
support a smoother playback (interspersing some queues or something?). I'll
also spend some more time investigating other RTSP examples for possible
solutions.

Thanks again,
Ben

On Mon, Apr 15, 2019 at 7:37 AM Ben Rush <ben at ben-rush.net> wrote:

> Thank you so much for your feedback. I'll try your suggestions and report
> back.
>
> On Mon, Apr 15, 2019, 01:14 Thornton, Keith <keith.thornton at zeiss.com
> wrote:
>
>> 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.
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
>
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