how to create proper HLS pipeline

[Chris Wine]

It might be that hlssink wants to see keyframes and durations of all the
content so that it knows where to split... try adding a "tsparse" element
after udpsrc. If that doesn't work, you might have to demux the individual
audio/video streams, run them through their respective parsers, and then
use hlssink2 to remux them.

--Chris

On Mon, Sep 20, 2021 at 5:45 PM Andres Gonzalez via gstreamer-devel <
gstreamer-devel at lists.freedesktop.org> wrote:

> Thanks for your response Chris.
>
> I tried your suggestion:
>
> gst-launch-1.0 udpsrc port=50000 caps="video/mpegts,systemstream=true" !
> hlssink target-duration=5 playlist-location="playlist.m3u8"
> location=segment.%03d.ts
>
> This pipeline is operational, however, it does not create the playlist and
> just generates a single segment file, and it keeps growing and growing.  I
> think the pipeline needs to know something about the video, otherwise how
> does it know if it has enough video in the segment file to match the
> specified target duration?
>
> In my application, I am using hlssink2 for the pipeline that is generating
> a new video stream (with appsrc, encoder, etc). But this pipeline has a
> udpsrc and so there isn't an encoder in the pipeline. That is the reason I
> am using hlssink instead of hlssink2 for this pipeline.
>
> -Andres
>
>
>
>
>
>
> On Mon, Sep 20, 2021 at 3:14 PM Chris Wine via gstreamer-devel <
> gstreamer-devel at lists.freedesktop.org> wrote:
>
>> Hi Andres,
>>
>> I believe hlssink takes an mpeg transport stream, so you don't need to
>> have the tsdemux element in there unless you need to do something else to
>> the streams before remuxing them and sending them to hlssink. So maybe just
>> "udpsrc ! hlssink" (with properties of course) will give you want you're
>> looking for.
>>
>> For making sure the caps are correct, you should just be able to set the
>> "caps" property on udpsrc:
>> udpsrc caps="video/mpegts,systemstream=true"
>>
>> If you already have separate audio and video streams, I'd use hlssink2
>> which does the mpegts muxing internally.
>>
>> --Chris
>>
>> On Mon, Sep 20, 2021 at 4:00 PM Andres Gonzalez via gstreamer-devel <
>> gstreamer-devel at lists.freedesktop.org> wrote:
>>
>>> Just some additional info.  I am using gst-launch just to figure out
>>> what the appropriate elements should be. I have a C++ app that I develop
>>> where I code up the pipeline for my application. But since I am not even
>>> sure which elements should be in the pipeline, I am experimenting around
>>> with creating the pipeline with gst-launch.
>>> Thanks,
>>> -Andres
>>>
>>> On Mon, Sep 20, 2021 at 1:49 PM Andres Gonzalez <
>>> andres.agoralabs at gmail.com> wrote:
>>>
>>>> Hi,
>>>> I have a question about creating an HLS pipeline.  I am receiving a
>>>> MPEG-TS UDP stream and I want to create a pipeline that will receive the
>>>> UDP TS stream, and then create/publish  a corresponding HLS stream. For
>>>> example, something like this:
>>>>
>>>> gst-launch-1.0 udpsrc port=50000 ! tsdemux ! hlssink playlist-root=
>>>> http://192.168.0.100:8080 location=segment.%03d.ts
>>>>
>>>> This actually works and receives the UDP/TS stream and starts to
>>>> generate the segment_000.ts file.  But it never creates the playlist file
>>>> and keeps adding to the segment_000.ts file.
>>>>
>>>> I am assuming that I need to provide some caps information about the
>>>> video coming in on the UDP/TS stream but I am not sure how to do that.  So
>>>> could someone tell me what the pipeline should consist of to get this
>>>> working?
>>>>
>>>> Thanks,
>>>> -Andres
>>>>
>>>
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