[gstreamer-bugs] [Bug 572973] buffer size request event

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gstreamer (core) | Ver: git




------- Comment #5 from Stefan Kost (gstreamer, gtkdoc dev)  2009-03-10 12:24 UTC -------
Hmm several problems with the query:
* if the bitrate changes, the buffersize might change
* if one has the source running and start encoding dynamically, it is difficult
to get the change sync'ed so that the frames of requested size appear.

A buffer-size request could be send just before a seek-event.

structure = gst_structure_empty_new ("GstBufferSize");
gst_structure_id_set (structure,
    GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
    GST_QUARK (SIZE), G_TYPE_INT64, size, NULL);
event = gst_event_new_custom (GST_EVENT_SEEK, structure);

The formats can be converted as they are for seeks.

Problem of both approaches is that elements need to convert that type of query/
event. At least audioconvert, audioresample come to my mind.
Of course we could send a gst_query_new_convert(GST_FORMAT_DEFAULT, samples,
GST_FORMAT_BYTES) from the encoder if we would know what format the source
uses.


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