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matroskamux: create streamable output if downstream is not seekable

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Ignore the "streamable" property setting and create streamable
output if downstream is known not to be seekable (as queried
via a SEEKABLE query).

Fixes pipelines like webmmux ! appsink creating seemingly
corrupted output if streamable has not been set to true.
This commit is contained in:
Tim-Philipp Müller 2012-02-25 15:40:39 +00:00
parent f9207722ca
commit f4afccff5c
1 changed files with 23 additions and 0 deletions
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23
gst/matroska/matroska-mux.c
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@ -2355,6 +2355,29 @@ gst_matroska_mux_start (GstMatroskaMux * mux)
guint32 segment_uid[4];
GTimeVal time = { 0, 0 };
/* if not streaming, check if downstream is seekable */
if (!mux->streamable) {
gboolean seekable;
GstQuery *query;
query = gst_query_new_seeking (GST_FORMAT_BYTES);
if (gst_pad_peer_query (mux->srcpad, query)) {
gst_query_parse_seeking (query, NULL, &seekable, NULL, NULL);
GST_INFO_OBJECT (mux, "downstream is %sseekable", seekable ? "" : "not ");
if (!seekable) {
mux->streamable = TRUE;
g_object_notify (G_OBJECT (mux), "streamable");
GST_WARNING_OBJECT (mux, "downstream is not seekable, but "
"streamable=false. Will ignore that and create streamable output "
"instead");
}
} else {
/* have to assume seeking is supported if query not handled downstream */
/* FIXME 0.11: change to query not handled => seeking not supported */
GST_WARNING_OBJECT (mux, "downstream did not handle seeking query");
}
}
if (!strcmp (mux->doctype, GST_MATROSKA_DOCTYPE_WEBM)) {
ebml->caps = gst_caps_new_simple ("video/webm", NULL);
} else {