Module flv

The FLV File Format

In RTMP, Both of the client and the server send/receive actual multi media data as the FLV file format. Its format consists of:

1. FLV header
   • Signature (“FLV”)
   • Version (8 bits)
   • Reserved (5 bits)
   • Whether some audio data is contained (1 bit)
   • Reserved (1 bit)
   • Whether some video data is contained (1 bit)
   • Offset to FLV data (that is, a size of this header = 9) (32 bits)
2. FLV file body
   • PreviousTagSize (32 bits. this of the first is 0)
   • FLV Tag (arbitrary size)

Note the FLV header is skipped by almost RTMP tools.

FLV Tag

FLV Tag is a part of actual FLV bodies. FLV Tag consists of:

• AudioTag
• VideoTag
• ScriptDataTag

Modules

• tags
  The FLV tags

Structs

• EncryptionHeader
• Flv
  The FLV container. This holds just 2 elements:
• NotFlvContainer
• UnknownTag

Enums

• FilterName
  Patterns of the FilterName field. Currently, FilterName consists of:

Functions

• not_flv_container
• unknown_tag