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qtmux: 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 qtmux ! appsink possibly creating seemingly
corrupted output if streamable has not been set to true.
This commit is contained in:
Tim-Philipp Müller 2012-02-25 15:55:15 +00:00
parent 6b0dd47586
commit 676b371bdb
1 changed files with 24 additions and 0 deletions
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24
gst/isomp4/gstqtmux.c
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@ -1613,6 +1613,30 @@ gst_qt_mux_start_file (GstQTMux * qtmux)
gst_pad_set_caps (qtmux->srcpad, caps);
gst_caps_unref (caps);
/* if not streaming, check if downstream is seekable */
if (!qtmux->streamable) {
gboolean seekable;
GstQuery *query;
query = gst_query_new_seeking (GST_FORMAT_BYTES);
if (gst_pad_peer_query (qtmux->srcpad, query)) {
gst_query_parse_seeking (query, NULL, &seekable, NULL, NULL);
GST_INFO_OBJECT (qtmux, "downstream is %sseekable",
seekable ? "" : "not ");
if (!seekable) {
qtmux->streamable = TRUE;
g_object_notify (G_OBJECT (qtmux), "streamable");
GST_WARNING_OBJECT (qtmux, "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 (qtmux, "downstream did not handle seeking query");
}
}
/* let downstream know we think in BYTES and expect to do seeking later on */
gst_pad_push_event (qtmux->srcpad,
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0));