Split into ogg files

[Diogo Rodrigues]

I have fixed the issues you pointed out (was in a hurry and didn't even
compile the code before sending the last email), and have done as you said
regarding the pads and it is working fine, thanks a lot!

On Fri, 25 Mar 2022 at 14:53, Tim-Philipp Müller <t.i.m at zen.co.uk> wrote:

> On Fri, 2022-03-25 at 14:35 +0000, Diogo Rodrigues wrote:
>
> Hi,
>
> > I'm still getting started with GStreamer so I'm not very used to its
> > syntax or workings. Namely, I do need to implement the pipeline in C
> > (although I know there is a C function that can interpret a string
> > description of a gst-launch pipeline, but I'd prefer to do everything
> > in C).I am having trouble translating the last part to C:
> >
> > mux.audio_%u splitmuxsink muxer-factory=oggmux name=mux max-size-
> > time=10000000000 location=file-%02u.ogg
> >
> > More specifically, the parts "mux.audio_%u" and "muxer-factory=oggmux
> > name=mux", I can't understand what they mean (even after reading gst-
> > launch docs, maybe I'm missing something, please bare with me). This
> > is what I've come up with so far, but it is clearly not working:
> >
>
> mux.audio_%u means "link to the element named mux" (we named it with
> splitmuxsink name=mux)
>
> The audio_%u part is the name of a pad template (gst-inspect-1.0
> splitmuxsink), so you're basically telling the gst-launch engine what
> request pad to request from splitmuxsink.
>
> If you're using GStreamer 1.20 you can use
>
>   src_pad = gst_element_get_static_pad(identity, "src");
>   sink_pad = gst_element_request_pad_simple(splitmuxsink, "audio_%u");
>   pad_link_return = gst_pad_link(src_pad, sink_pad);
>
> pad_link_return is an enum, not a boolean for what it's worth. Also
> make sure the elements have been added to the pipeline/bin before
> linking them.
>
> >     g_object_set(identity, "drop-buffer-flags",
> > GST_BUFFER_FLAG_HEADER, NULL);
>
> In this case this works, but in general flags properties are a bit
> tricky because the enum is usually not public. You can use the numbers
> you see in gst-inspect-1.0 identity (0x400), or you can use
> gst_util_set_object_arg(identity, "headers");
>
>
> >     g_object_set(sink, "max-size-time", 10000000000 NULL);
>
>
> This is a 64-bit integer, so best to use (guint64) 10000000000 or
> G_GUINT64_CONSTANT(10000000000), or (guint64) 10 * GST_SECOND.
>
> g_object_set() is a vararg function that will fail in interesting ways
> if you don't pass the exact type that it expects for the property.
>
> >     gst_bin_add_many(GST_BIN(pipeline), source, parser, decoder,
> > converter, encoder, sink, NULL);
> >     if (gst_element_link_many(source, parser, decoder, converter,
> > encoder, sink, NULL) != TRUE)
>
> It doesn't look like you have the identity in here? (Not that it
> matters for making linking work)
>
> I think you'll have to link like I suggested above (code untested
> though), so it creates a request pad with the right pad template.
>
> Cheers
>  Tim
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20220325/e648a682/attachment-0001.htm>