Index Number Request (Cd, Vcd); Frame Number Request (Dvd) - Pioneer DVD-V7400 Command Protocol Manual

If a disc lacks Time information, the player returns error message E04.
If a disc Time Code fails to be read correctly, the player retains the previous
Time Code.
Execution :
String
?T<CR>
?T<CR>
6.5

Index Number Request (CD, VCD)

Function : Returns the current Index number
Format : ?I
Explanation :
Correct values show only when the player is in Random Access Mode or is
reading the lead-in/lead-out area of the disc.
Execution :
String
?I<CR>
6.6

Frame Number Request (DVD)

Function : Returns the current Frame number
Format : ?F
Explanation :
The player may experience a conflict between the command receiving/
handling and the Frame number updating. Thus, continuous Frame numbers
may be unavailable when the system is in Playback mode.
If the command is sent to a disc without Frame numbers, the player returns
error message E04.
Accurate, current values are available when the player is in Random Access
mode or is reading the lead-in/lead-out area of the disc.
Status Return
03213<CR>
11742<CR>
The player returns the current Index number as a 4-digit integer.
Status Return
0102<CR>
The player returns the contents of the Current Frame Register.
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Current Address Request Descriptions
DVD player
Play mode (VCD)
32 minutes, 13 seconds
117 minutes, 42 seconds
DVD player
Play mode
Track 1, Index 2