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matroskamux: Do caps renegotiation when it only adds fields

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Matroskamux can accept caps renegotiation if the new caps is a
superset of the old one, meaning upstream added new info to
the caps.

Same logic as a5f22f03aa in qtmux.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/678>
This commit is contained in:
Thibault Saunier 2020-07-22 14:31:13 -04:00 committed by GStreamer Merge Bot
parent 10f07e84a5
commit 18aeb5bac1
1 changed files with 3 additions and 2 deletions
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5
gst/matroska/matroska-mux.c
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@ -970,9 +970,10 @@ gst_matroska_mux_video_pad_setcaps (GstPad * pad, GstCaps * caps)
if ((old_caps = gst_pad_get_current_caps (pad))) {
if (mux->state >= GST_MATROSKA_MUX_STATE_HEADER
&& !gst_caps_is_equal (caps, old_caps)) {
&& !gst_caps_is_subset (caps, old_caps)) {
GST_ELEMENT_ERROR (mux, STREAM, MUX, (NULL),
("Caps changes are not supported by Matroska"));
("Caps changes are not supported by Matroska\nCurrent: `%"
GST_PTR_FORMAT "`\nNew: `%" GST_PTR_FORMAT "`", old_caps, caps));
gst_caps_unref (old_caps);
goto refuse_caps;
}