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matroskamux: write subtitle codec ID and data at start when known

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This avoids issues with writing dummy data first, then having
to come back and write correct data later. Doing so prevents
the muxed stream from being actually streamable.

https://bugzilla.gnome.org/show_bug.cgi?id=712134
This commit is contained in:
Vincent Penquerc'h 2014-01-09 18:25:04 +00:00
parent 03dff9de0b
commit 1c6ee3fba4
1 changed files with 6 additions and 0 deletions
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6
gst/matroska/matroska-mux.c
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@ -2378,7 +2378,13 @@ gst_matroska_mux_track_header (GstMatroskaMux * mux,
case GST_MATROSKA_TRACK_TYPE_SUBTITLE:{
gpointer buf;
/* If codec_id and codec data are already known, we can write
them now, as for audio/video */
if (context->codec_id && context->codec_priv)
break;
context->pos = ebml->pos;
/* CodecID is mandatory ... */
gst_ebml_write_ascii (ebml, GST_MATROSKA_ID_CODECID, "S_SUB_UNKNOWN");
/* reserve space */