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qtmux: Use a better default value for the movie header timescale

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Take the maximum video timescale, or if no video track is present the
previous value of 1800.

https://bugzilla.gnome.org/show_bug.cgi?id=769041
This commit is contained in:
Sebastian Dröge 2016-10-20 20:41:07 +03:00
parent 727fa1c7c3
commit e0aec317ff
1 changed files with 37 additions and 4 deletions
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41
gst/isomp4/gstqtmux.c
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@ -273,7 +273,7 @@ enum
/* some spare for header size as well */
#define MDAT_LARGE_FILE_LIMIT ((guint64) 1024 * 1024 * 1024 * 2)
#define DEFAULT_MOVIE_TIMESCALE 1800
#define DEFAULT_MOVIE_TIMESCALE 0
#define DEFAULT_TRAK_TIMESCALE 0
#define DEFAULT_DO_CTTS TRUE
#define DEFAULT_FAST_START FALSE
@ -402,8 +402,8 @@ gst_qt_mux_class_init (GstQTMuxClass * klass)
g_object_class_install_property (gobject_class, PROP_MOVIE_TIMESCALE,
g_param_spec_uint ("movie-timescale", "Movie timescale",
"Timescale to use in the movie (units per second)",
1, G_MAXUINT32, DEFAULT_MOVIE_TIMESCALE,
"Timescale to use in the movie (units per second, 0 == default)",
0, G_MAXUINT32, DEFAULT_MOVIE_TIMESCALE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TRAK_TIMESCALE,
g_param_spec_uint ("trak-timescale", "Track timescale",
@ -2149,8 +2149,41 @@ gst_qt_mux_start_file (GstQTMux * qtmux)
gst_segment_init (&segment, GST_FORMAT_BYTES);
gst_pad_push_event (qtmux->srcpad, gst_event_new_segment (&segment));
/* initialize our moov recovery file */
GST_OBJECT_LOCK (qtmux);
if (qtmux->timescale == 0) {
guint32 suggested_timescale = 0;
GSList *walk;
/* Calculate a reasonable timescale for the moov:
* If there is video, it is the biggest video track timescale or an even
* multiple of it if it's smaller than 1800.
* Otherwise it is 1800 */
for (walk = qtmux->sinkpads; walk; walk = g_slist_next (walk)) {
GstCollectData *cdata = (GstCollectData *) walk->data;
GstQTPad *qpad = (GstQTPad *) cdata;
if (!qpad->trak)
continue;
/* not video */
if (!qpad->trak->mdia.minf.vmhd)
continue;
suggested_timescale =
MAX (qpad->trak->mdia.mdhd.time_info.timescale, suggested_timescale);
}
if (suggested_timescale == 0)
suggested_timescale = 1800;
while (suggested_timescale < 1800)
suggested_timescale *= 2;
qtmux->timescale = suggested_timescale;
}
/* initialize our moov recovery file */
if (qtmux->moov_recov_file_path) {
gst_qt_mux_prepare_moov_recovery (qtmux);
}