Codec Type | Codec ID Prefix |
---|---|
Video | "V_" |
Audio | "A_" |
Subtitle | "S_" |
Button | "B_" |
Codec ID Prefix | Major Codec ID | Separator | Codec ID Suffix | Codec ID |
---|---|---|---|---|
A_ | AAC | / | MPEG2/LC/SBR | A_AAC/MPEG2/LC/SBR |
V_ | MPEG4 | / | ISO/ASP | V_MPEG4/ISO/ASP |
V_ | MPEG1 | V_MPEG1 |
BlockAddID Value | Definition |
---|---|
0 | Invalid. |
1 | Indicates that the context of the BlockAdditional data is defined by the corresponding Codec Mapping. |
2 or greater | BlockAddID values of 2 and greater are mapped to the BlockAddIDValue of the BlockAdditionMapping of the associated Track. |
BlockAddIDType | BlockAddIDName | Citation |
---|---|---|
121 | SMPTE ST 12-1 timecode |
Bit Positions | Label |
---|---|
0--3 | Units of frames |
4--7 | First binary group |
8--9 | Tens of frames |
10 | Drop frame flag |
11 | Color frame flag |
12--15 | Second binary group |
16--19 | Units of seconds |
20--23 | Third binary group |
24--26 | Tens of seconds |
27 | Polarity correction |
28--31 | Fourth binary group |
32--35 | Units of minutes |
36--39 | Fifth binary group |
40--42 | Tens of minutes |
43 | Binary group flag BGF0 |
44--47 | Sixth binary group |
48--51 | Units of hours |
52--55 | Seventh binary group |
56--57 | Tens of hours |
58 | Binary group flag BGF1 |
59 | Binary group flag BGF2 |
60--63 | Eighth binary group |