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qtmux: Revert commits that set DTS and duration on buffers unconditionally

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39f7e52266 was setting the buffer duration
to 0 if is not valid, under the assumption that this is "the last"
buffer and no others are coming next. This is wrong, last_buf is the
previous buffer and not the very last one.

4e3c13c87c was setting DTS to 0 if there
was none. This will set DTS to 0 for all e.g. audio streams, completely
messing up calculations if streams don't start at 0.

https://bugzilla.gnome.org/show_bug.cgi?id=774840
This commit is contained in:
Sebastian Dröge 2016-11-22 15:59:19 +02:00
parent 9acc0b5d0e
commit 351f2fca0a
1 changed files with 2 additions and 28 deletions
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30
gst/isomp4/gstqtmux.c
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@ -3184,35 +3184,8 @@ gst_qt_mux_add_buffer (GstQTMux * qtmux, GstQTPad * pad, GstBuffer * buf)
last_buf = pad->last_buf;
/* DTS delta is used to calculate sample duration.
* If buffer has missing DTS, we take either segment start or
* previous buffer end time, whichever is later.
* This must only be done for non sparse streams, sparse streams
* can have gaps between buffers (which is handled later by adding
* extra empty buffer with duration that fills the gap). */
if (!pad->sparse && buf && !GST_BUFFER_DTS_IS_VALID (buf)) {
GstClockTime last_buf_duration = last_buf
&& GST_BUFFER_DURATION_IS_VALID (last_buf) ?
GST_BUFFER_DURATION (last_buf) : 0;
buf = gst_buffer_make_writable (buf);
GST_BUFFER_DTS (buf) = 0; /* running-time 0 */
if (last_buf
&& (GST_BUFFER_DTS (last_buf) + last_buf_duration) >
GST_BUFFER_DTS (buf)) {
GST_BUFFER_DTS (buf) = GST_BUFFER_DTS (last_buf) + last_buf_duration;
}
}
ret = gst_qt_mux_check_and_update_timecode (qtmux, pad, buf, ret);
if (last_buf && !buf && !GST_BUFFER_DURATION_IS_VALID (last_buf)) {
/* this is last buffer; there is no next buffer so we need valid number as duration */
last_buf = gst_buffer_make_writable (last_buf);
GST_BUFFER_DURATION (last_buf) = 0;
}
if (last_buf == NULL) {
#ifndef GST_DISABLE_GST_DEBUG
if (buf == NULL) {
@ -3227,8 +3200,9 @@ gst_qt_mux_add_buffer (GstQTMux * qtmux, GstQTPad * pad, GstBuffer * buf)
#endif
pad->last_buf = buf;
goto exit;
} else
} else {
gst_buffer_ref (last_buf);
}
/* if this is the first buffer, store the timestamp */
if (G_UNLIKELY (pad->first_ts == GST_CLOCK_TIME_NONE) && last_buf) {