avfvideosrc: Fix wrong default framerate value

Current default G_MAXINT is not a correct value under any circumstances.
This creates an issue with screen capture, during which we currently do
not get any framerate info causing G_MAXINT to show up, where elements
downstream can possibly misbehave - for example, `vtenc` causes
a kernel panic.
Replace with 30/1 to avoid such scenarios.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2944>

diff --git a/subprojects/gst-plugins-bad/sys/applemedia/avfvideosrc.m b/subprojects/gst-plugins-bad/sys/applemedia/avfvideosrc.m
index e357eb0..da205a5 100644 (file)
--- a/subprojects/gst-plugins-bad/sys/applemedia/avfvideosrc.m
+++ b/subprojects/gst-plugins-bad/sys/applemedia/avfvideosrc.m
@@ -1089,7 +1089,7 @@ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
   /* crank up to 11. This is what the presets do, but we don't use the presets
    * in ios >= 7.0 */
   gst_structure_fixate_field_nearest_int (structure, "height", G_MAXINT);
-  gst_structure_fixate_field_nearest_fraction (structure, "framerate", G_MAXINT, 1);
+  gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
 
   return gst_caps_fixate (new_caps);
 }