adding datetime stamp to location

[Nicolas Dufresne]

Le mercredi 08 septembre 2021 à 15:03 -0400, Dwight Kulkarni a écrit :
> Hi Nicolas and everyone,
> 
> I was able to get the issue resolved with the method that Nicolas mentioned,
> namely to get media-configure callback and then access the element by name and
> then get the "format-location" callback on the splitmuxsink and pass it the
> formatted name in a function.
> 
> This is working great !! Thank you Nicolas.
> 
> However, now I am having a problem that I start the RTSP server, and the
> pipeline only seems to save when I login with VLC client to view the stream.
> As soon as I log off, the file stops saving.
> 
> Is there a way to have the RTSP pipeline run even when no client is connected
> ?  Or can I simulate a fake client in someway ?

This is how RTSP server handles it's internal pipeline. To get full control of
the recording, I would suggest using an external pipeline, and have a branch
that ends with appsink, that will then feed an appsink in the rtspserver
pipeline.

> 
> 
> 
> On Wed, Sep 8, 2021 at 1:36 PM Dwight Kulkarni <dwight at realtime-7.com> wrote:
> > Hi Nicolas,
> > 
> > Thank you for this info ! 
> > 
> > In the example shown we get callback to media_configure, and access the
> > pipeline element. Do I have to then create another call back for the file
> > sink as shown below? 
> > 
> > static void
> > media_configure (GstRTSPMediaFactory * factory, GstRTSPMedia * media,
> > gpointer user_data)
> > {
> > GstElement *element = gst_rtsp_media_get_element (media);
> > GstElement * filesink = gst_bin_get_by_name_recurse_up (GST_BIN (element),
> > "filesink");
> > # add a callback signal
> > g_signal_connect (G_OBJECT (filesink), "format-location", G_CALLBACK
> > (format_location_callback), NULL);
> > 
> > 
> > PIPELINE = 
> > (v4l2src device=/dev/video1 ! video/x-raw,width=1920, height=1080! 
> > queue ! vpuenc_h264 ! queue ! h264parse ! splitmuxsink name=filesink
> > location=video%02d.mkv max-size-time=10000000000  
> > muxer-factory=matroskamux muxer-properties="properties,streamable=true)
> > 
> > 
> > 
> > 
> > 
> > On Wed, Sep 8, 2021 at 12:16 PM Nicolas Dufresne <nicolas at ndufresne.ca>
> > wrote:
> > > Le mercredi 08 septembre 2021 à 10:35 -0400, Dwight Kulkarni via
> > > gstreamer-devel a écrit :
> > > > Hi all,
> > > > 
> > > > I am trying to get my pipeline to add a datetime stamp to the location,
> > > > as opposed to the numeric value. 
> > > > 
> > > > Previously I was using:  splitmuxsink location=video%02d.mkv
> > > > 
> > > > This is creating multiple files with video00.mkv etc. names.
> > > > 
> > > > Now I tried using: splitmuxsink location=video$(date +%s).mkv
> > > > 
> > > > This is creating only a single file with timestamp and appears to
> > > > overwrite the previous files. 
> > > > 
> > > > 1) I see some examples where a callback is used. Should I use a callback
> > > > or is there another way ?
> > > > 
> > > > 2) If I use callback, I have GstMediaFactory object where I assign the
> > > > pipeline with:  gst_rtsp_media_factory_set_launch
> > > 
> > > 
> > > You have to connect to the "media-configure" signal of your factory:
> > > 
> > >
> >
> https://gitlab.freedesktop.org/gstreamer/gst-rtsp-server/-/blob/master/examples/test-appsrc.c#L123
> > > 
> > > And then use gst_rtps_media_get_element() to retreive the pipeline:
> > > 
> > >
> >
> https://gitlab.freedesktop.org/gstreamer/gst-rtsp-server/-/blob/master/examples/test-appsrc.c#L66
> > > 
> > > regards,
> > > Nicolas
> > > 
> > > > 
> > > > I can't seem to find how to access the pipeline element in
> > > > GstMediaFactory object.
> > > > 
> > > > I want to do something like this code:
> > > > 
> > > > static gchararray
> > > > format_location_callback (GstElement * splitmux,
> > > > guint fragment_id,
> > > > gpointer udata)
> > > > {
> > > > static int i =0;
> > > > gchararray myarray = g_strdup_printf("myvid%d.mp4", i);
> > > > i += 1;
> > > > 
> > > > return myarray;
> > > > }
> > > > 
> > > > g_signal_connect (G_OBJECT (bin->sink), "format-location",
> > > > G_CALLBACK (format_location_callback), bin);
> > > > 
> > > > Any help is appreciated. Thanks !
> > > > 
> > > 
> > > 
> > 
> > 
> > -- 
> > Sincerely,
> > 
> > Dwight Kulkarni
> 
> 

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