When splitting a frame, the gst_buffer_copy_region() does not copy
the timestamp correctly for sub frames when the offset is not 0.
We still need those timestamps for each output sub frame.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3448>
tmp_frame.overhead = frame->overhead;
tmp_frame.buffer = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL,
nalu.offset, nalu.size);
+ /* Don't lose timestamp when offset is not 0. */
+ GST_BUFFER_PTS (tmp_frame.buffer) = GST_BUFFER_PTS (buffer);
+ GST_BUFFER_DTS (tmp_frame.buffer) = GST_BUFFER_DTS (buffer);
+ GST_BUFFER_DURATION (tmp_frame.buffer) = GST_BUFFER_DURATION (buffer);
/* Set marker on last packet */
if (nl + nalu.size == left) {