Commit 518386c9 authored by Andrew Voznytsa's avatar Andrew Voznytsa

Non-invasive media file offset adjusting

parent 0c53e2e7
......@@ -854,13 +854,22 @@ VideoReceiver::_keyframeWatch(GstPad* pad, GstPadProbeInfo* info, gpointer user_
} else {
VideoReceiver* pThis = static_cast<VideoReceiver*>(user_data);
// reset the clock
GstClock* clock = gst_pipeline_get_clock(GST_PIPELINE(pThis->_pipeline));
GstClockTime time = gst_clock_get_time(clock);
gst_element_set_base_time(pThis->_pipeline, time); // offset pipeline timestamps to start at zero again
buf->dts = 0; // The offset will not apply to this current buffer, our first frame, timestamp is zero
buf->pts = 0;
// set media file '0' offset to current timeline position - we don't want to touch other elements in the graph, except these which are downstream!
gint64 position;
if (gst_element_query_position(pThis->_pipeline, GST_FORMAT_TIME, &position) != TRUE) {
qCDebug(VideoReceiverLog) << "Unable to get timeline position, let's hope that downstream elements will survive";
if (buf->pts != GST_CLOCK_TIME_NONE) {
position = buf->pts;
} else {
position = gst_pad_get_offset(pad);
gst_pad_set_offset(pad, position);
// Add the filesink once we have a valid I-frame
gst_bin_add_many(GST_BIN(pThis->_pipeline), pThis->_sink->filesink, nullptr);
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