qtdemux: In gap mode, consider the mdat offset when calculating the remaining mdat...

The mdat generally does not start at offset 0, we have to include the
size of the moof and whatever else was in front of the mdat.

diff --git a/gst/isomp4/qtdemux.c b/gst/isomp4/qtdemux.c
index 87f8f42..f8f08cd 100644 (file)
--- a/gst/isomp4/qtdemux.c
+++ b/gst/isomp4/qtdemux.c
@@ -3282,6 +3282,7 @@ qtdemux_parse_trun (GstQTDemux * qtdemux, GstByteReader * trun,
    * size, else we will still be able to use this when dealing with gap'ed
    * input */
   qtdemux->mdatleft = *running_offset - initial_offset;
+  qtdemux->mdatoffset = initial_offset;
   qtdemux->mdatsize = qtdemux->mdatleft;
 
   stream->n_samples += samples_count;
@@ -6276,7 +6277,8 @@ gst_qtdemux_chain (GstPad * sinkpad, GstObject * parent, GstBuffer * inbuf)
             /* Finally update all push-based values to the expected values */
             demux->neededbytes = demux->streams[i]->samples[res].size;
             demux->offset = GST_BUFFER_OFFSET (inbuf);
-            demux->mdatleft = demux->mdatsize - demux->offset;
+            demux->mdatleft =
+                demux->mdatsize - demux->offset + demux->mdatoffset;
             demux->todrop = 0;
           }
         }