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basevideocodec: By default don't allow caps changes on the srcpad
This fixed playback of Dirac files with schrodec when upstream wants a different width/height, basevideocodec accepts this and then pushes buffers with new caps but content of the old caps. In the best case this will just result in wrong unit size and a failure in basestransform elements.
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@ -92,6 +92,7 @@ gst_base_video_codec_init (GstBaseVideoCodec * base_video_codec,
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g_return_if_fail (pad_template != NULL);
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base_video_codec->srcpad = gst_pad_new_from_template (pad_template, "src");
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gst_pad_use_fixed_caps (base_video_codec->srcpad);
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gst_element_add_pad (GST_ELEMENT (base_video_codec),
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base_video_codec->srcpad);
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