stsg is part of strk instead of strd

[lennartkloock]

Summary

The sg-tl-st.mp4 file contains the following structure:

• strk
  • stsg

Though the spec (ISO/IEC 14496-12) says that the structure should be the following:

• strk
  • strd
    • stsg

Steps to reproduce

1. Use any ISOBMFF parser to parse sg-tl-st.mp4

Affected specifications

• ISO/IEC 14496-12

Affected files

• sg-tl-st.mp4

[DenizUgur]

The second strk seems to be missing from the dump of that file as well.

xxd sg-tl-st.mp4 | grep strk
00000360: 0000 0084 7564 7461 0000 003a 7374 726b  ....udta...:strk
000003a0: 0001 0000 0042 7374 726b 0000 0020 7374  .....Bstrk... st