AAUX Source Control (ASC) Pack
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The following tables list the values used by the MSDV driver to fill in the dwDVAAuxCtl and
dwDVAAuxCtl1 members of the DVINFO structure. For more information, see DVINFO Field Settings in the MSDV Driver.
DVCR Settings
DV Standard
DVCR (IEC 61834)
FOURCC
dvsl
dvsd
System
525-60
625-50
525-60
625-50
CGMS (2)
00
00
00
00
ISR (2)
11
11
11
11
CMP (2)
11
11
11
11
SS (2)
11
11
11
11
REC ST (1)
1
1
1
1
REC END (1)
1
1
1
1
REC MODE (3)
001
001
001
001
INSERT CH (3)
111
111
111
111
DRF (1)
1
1
1
1
SPEED (7)
010:0000
010:0000
010:0000
010:0000
Reserved (1)
1
1
1
1
GENRE (7)
111:1111
111:1111
111:1111
111:1111
ASC Pack (both audio blocks)*
0xFFA0CF3F
0xFFA0CF3F
0xFFA0CF3F
0xFFA0CF3F
DVCR 25 and DVCPRO 50 Settings (Planned)
DV Standard
DVCPRO (SMPTE 314M) — Planned
FOURCC
dv25
dv50
System
525-60
625-50
525-60
625-50
CGMS (2)
00
00
00
00
Reserved (4)
1111
1111
1111
1111
EFC (2)
00
00
00
00
REC ST (1)
1
1
1
1
REC END (1)
1
1
1
1
FADE ST (1)
1
1
1
1
FADE END (1)
1
1
1
1
Reserved (4)
1111
1111
1111
1111
DRF (1)
1
1
1
1
SPEED (7)
111:1000
110:0100
111:1000
110:0100
Reserved (8)
1111:1111
1111:1111
1111:1111
1111:1111
ASC Pack (both audio blocks)*
0xFFA0CF3F
0xFFA0CF3F
0xFFA0CF3F
0xFFA0CF3F
* The DVINFO structure contains two AAUX AS packs, for audio blocks 1 and 2. DV50 has four audio blocks; blocks 3 and 4 are not represented in the DVINFO structure.
DVCR 100 Settings (Planned)
DV Standard
DVCPRO 100 — Planned
FOURCC
dvh1
System
1080-60i
720-60p
1080-50i
CGMS (2)
00
00
00
Reserved (4)
1111
1111
1111
EFC (2)
00
00
00
REC ST (1)
1
1
1
REC END (1)
1
1
1
FADE ST (1)
1
1
1
FADE END (1)
1
1
1
Reserved (4)
1111
1111
1111
DRF (1)
1
1
1
SPEED (7)
111:1000
111:1000
110:0100
Reserved (8)
1111:1111
1111:1111
1111:1111
ASC Pack (both audio blocks)*
0xFFF8FF3C
0xFFF8FF3C
0xFFE4FF3C
* DVCPRO 100 has 8 audio blocks; blocks 3 through 8 are not represented in the DVINFO structure.
Remarks
The following field codes are of interest:
CGMS: Copy generation management system. 0 = copying permitted without restriction.
The actual ASC packs in the DV stream may contain different values.
REC MODE: Recording mode. 1 = Original
SPEED: VTR playback speed.
IEC 61834 definition:
- 010:0000 = normal speed, 525-60 or 625-50
SMPTE 314M definition:
- 111:1000 = normal speed, 525-60
- 110:0100 = normal speed, 625-50
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