Difference between revisions of "MGV"
From MSX Game Library
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| − | + | '''MGV''' is a video format for MSXgl. | |
== Format == | == Format == | ||
| Line 100: | Line 100: | ||
== Extension == | == Extension == | ||
| − | <tt>. | + | * Default extension (for MSX-DOS): <tt>.MGV</tt> |
| + | * Alternative for Windows/Linux: <tt>.MGLV</tt> | ||
== Change log == | == Change log == | ||
Latest revision as of 00:59, 29 October 2024
MGV is a video format for MSXgl.
Format
Header
| Offset | Size | Desc. | Value |
|---|---|---|---|
| 0x0000 | 3 | Signature | "MGV" |
| 0x0003 | 1 | Flag |
7 6 5 4 3 2 1 0 │ │ └──┴──┴──┴── File format version (0-15) │ └────────────── Segment size (0: 8 KB, 1: 16 KB) └─────────────────────── Include video format data (4 bytes) |
| (0x0004) | 1 | Video format - Image |
7 6 5 4 3 2 1 0 │ │ │ └──┴──┴── Screen mode (0-7) │ │ └───────────────── Screen width (0: 256 px, 1: 512 px) └──┴──────────────────── Bit per pixel (0: 1-bit, 1: 2-bit, 2: 4-bit, 3: 8-bit) Screen mode:
|
| (0x0005) | 1 | Video format - Replay |
7 6 5 4 3 2 1 0 │ │ └──┴──┴──┴── Frame skip (0-15) │ └──────────────────── Loop (0: No, 1: Yes) └─────────────────────── Frequency (0: 50 Hz, 1: 60 Hz) At 50 Hz, a frame skip of 1 means 25 fps. |
| (0x0006) | 1 | Video format - Width | 1-256 (or 2-512 for Screen mode 6 and 7) |
| (0x0007) | 1 | Video format - Height | 1-256 |
Commands
| Cmd | Options | Desc. |
|---|---|---|
| 00 | End of data | |
| 01 | End of segment (increment segment index and reset data pointer) | |
| 02 | End of line | |
| x3 | Switch to table x:
| |
| n4 | Skip n bytes (1-15) | |
| 05 | nn | Skip nn bytes (1-255) |
| 06 | nnnn | Skip nnnn bytes (1-65535) |
| 07 | Skip a frame / End of frame | |
| n8 | vv | Fill n bytes (1-15) with vv value |
| 09 | nn,vv | Fill nn bytes (1-255) with vv value |
| 0A | nnnn,vv | Fill nnnn bytes (1-65535) with vv value |
| 0B | vv | Fill a full frame with vv value |
| nC | vv[n] | Copy n bytes (1-15) from vv[n] data table |
| 0D | nn,vv[nn] | Copy nn bytes (1-255) from vv[nn] data table |
| 0E | nnnn,vv[nnnn] | Copy nnnn bytes (1-65535) from vv[nnnn] data table |
| 0F | vv[] | Copy a full frame from data table (raw frame) |
Extension
- Default extension (for MSX-DOS): .MGV
- Alternative for Windows/Linux: .MGLV
Change log
- Version 1.0 (2024/03/31)
- Original version (File format version 0)