2.2.6.7.1 x-asf-byte
The x-asf-byte token is used to express a start position and, optionally, a stop position in units of bytes counted from the start of the content. Byte offsets are expressed as integer decimal numbers. The beginning of the ASF file has byte offset 0. The first ASF data packet is located at the byte offset that corresponds to the size of the ASF file header (as specified in section 2.2.5.2.3.1).
The ABNF syntax for the x-asf-byte token is as follows.
-
byte-offset = 1*20DIGIT byte-range = "x-asf-byte=" byte-offset "-" [ byte-offset ]
The value of byte-offset MUST be an integer in the range 0 to 18,446,744,073,709,551,614, inclusive.