Fixed support for MP4 files without CTTS box in a track header.

src/input/input_mp4.cpp

@@ -23,6 +23,7 @@ namespace Mist {
     offsetIndex = 0;
     offsetPos = 0;
     sttsBox.clear();
+    hasCTTS = false;
     cttsBox.clear();
     stszBox.clear();
     stcoBox.clear();
@@ -75,6 +76,7 @@ namespace Mist {
                     tmp = std::string(stblLoopPeek.asBox() ,stblLoopPeek.boxedSize());
                     cttsBox.clear();
                     cttsBox.read(tmp);
+                    hasCTTS = true;
                   }else if (stblBoxType == "stsz"){
                     tmp = std::string(stblLoopPeek.asBox() ,stblLoopPeek.boxedSize());
                     stszBox.clear();
@@ -163,15 +165,17 @@ namespace Mist {
       offsetIndex = 0;
       offsetPos = 0;
     }
-    MP4::CTTSEntry tmpCTTS;
-    while (offsetIndex < cttsBox.getEntryCount()){
-      tmpCTTS = cttsBox.getCTTSEntry(offsetIndex);
-      if ((index - offsetPos) < tmpCTTS.sampleCount){
-        timeOffset = (tmpCTTS.sampleOffset*1000)/timeScale;
-        break;
+    if (hasCTTS){
+      MP4::CTTSEntry tmpCTTS;
+      while (offsetIndex < cttsBox.getEntryCount()){
+        tmpCTTS = cttsBox.getCTTSEntry(offsetIndex);
+        if ((index - offsetPos) < tmpCTTS.sampleCount){
+          timeOffset = (tmpCTTS.sampleOffset*1000)/timeScale;
+          break;
+        }
+        offsetPos += tmpCTTS.sampleCount;
+        ++offsetIndex;
       }
-      offsetPos += tmpCTTS.sampleCount;
-      ++offsetIndex;
     }
 
     //next lines are common for next-getting and seeking

src/input/input_mp4.h

@@ -63,6 +63,7 @@ namespace Mist {
       MP4::STCO stcoBox;
       MP4::STSZ stszBox;
       MP4::STTS sttsBox;
+      bool hasCTTS;
       MP4::CTTS cttsBox;
       MP4::STSC stscBox;
       long unsigned int timeScale;

src/io.cpp

@@ -264,6 +264,7 @@ namespace Mist {
     }
     //Save the current write position
     size_t curOffset = pagesByTrack[tid][curPageNum[tid]].curOffset;
+    DONTEVEN_MSG("Buffering packet on page %lu for track %lu~>%lu: %d bytes @ %lu: %s", curPageNum[tid], tid, mapTid, pack.getDataLen(), curOffset);
     //Do nothing when there is not enough free space on the page to add the packet.
     if (pagesByTrack[tid][curPageNum[tid]].dataSize - curOffset < pack.getDataLen()) {
       FAIL_MSG("Trying to buffer a packet on page %lu for track %lu~>%lu, but we have a size mismatch. The packet is %d bytes long, so won't fit at offset %lu on a page of %llu bytes!", curPageNum[tid], tid, mapTid, pack.getDataLen(), curOffset, pagesByTrack[tid][curPageNum[tid]].dataSize);