Ruben’s blog

wget http://home.wanadoo.nl/squell/files/id3-0.78.tar.gz
tar xvzf id3-0.78.tar.gz
cd id3-0.78
sed -ibak -e 's/^\(CFLAGS.*=.*$\)/\1 -mno-cygwin/' makefile
sed -ibak -e 's/\($(CXX)\) \($(OBJECTS:=.o)\)/\1 $(CXXFLAGS) \2/' makefile
make
make install

        use MP4::Info;
        my $file = 'MAQ12331.MP4';
 
        my $tag = get_mp4tag($file) or die "No TAG info";
        printf "$file title:%s encoder: %s\n", $tag->{NAM}, $tag->{TOO};

use MP4::Info;
        my $file = 'MAQ12033.MP4';
 
        my $tag = get_mp4tag($file) or die "No TAG info";
        printf "$file title is %s\n", $tag->{NAM};
 
        my $info = get_mp4info($file);
        printf "$file title is %s\n", $info->{NAM};
 
        my $mp4 = new MP4::Info $file;
        printf "$file title is %s\n", $mp4->title;

+/*********
+
+     PSP USMT->MTDT meta info block format  (some guessing)
+     
+        - Note that clips play fine without this block.
+     
+     int32    : size of MTDT block
+     char[4]  : "MTDT"
+     int16    : Number of sub-data blocks (payloads)
+                    0x0001 EOT markers have 1 block
+                    0x0004 is the most I've seen in an information block (title, date, etc)
+     
+     Some number of data blocks, which take the form of:
+     
+        int16   : size of sub-data block
+        int32   : block type ID  (possibly 2 int16s:  unk & type )
+                    0x01 = Title
+                    0x03 = Timestamp (date format = "+%Y-%m-%d %k:%M:%S")
+                    0x04 = Creator Name
+                    0x0A = End of Track Marker
+                    0x0B = UNKNOWN (appears in info MTDT blocks)
+        int16   : ?flags? - generally 0x55c4 or 0x15c7, seen 0x2a0e, possibly font or language?)
+                    - Timestamp seems to always have 0x55c4
+        int16   : type of payload that follows?  (int, string, etc..?)
+                    - Unicode strings have 0x0001
+                    - short[] data has 0x0000
+        data[]  : Payload (strings are UTF16-BE short[] with 0x0000 terminator)
+        
+        
+        BLOCK IDs
+        
+           0x000A - Appear at end of tracks
+                
+                - flags always = 0x55c4
+                - Payload looks like: 0x0000 0x0100 0x0000 0x0000
+                
+           0x000B - Appears in meta data
+                - Payload looks like: 0x0000 0x?????  
+                - (0x???? probably flags- seen 0x1c02, 0x5cfe.  Maybe something with aspect ratio or frame rate?)
+        
+********/