https://www.temlib.org/AtariForumWiki/index.php?action=history&feed=atom&title=Video_Master_file_formatVideo Master file format - Revision history2026-05-13T18:37:22ZRevision history for this page on the wikiMediaWiki 1.39.2https://www.temlib.org/AtariForumWiki/index.php?title=Video_Master_file_format&diff=19268&oldid=prev>Lp: New page2017-02-05T21:33:13Z<p>New page</p>
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Video Master file format: (VID,FLM & VSQ)<br />
-----------------------------------------<br />
<br />
<br />
Header (32 bytes)<br />
size name Description<br />
-------------------------------------------------------------------------<br />
long header Contains 'VMAS'<br />
word version Contains '1x' for version 1.x<br />
word no_frames No. of frames of video...<br />
word frame_rate Playback rate of video (see table)<br />
long sample_size Amount of audio in file... (0=no audio - VID )<br />
word sample_rate Sample playback rate (Hz)<br />
word seq_length Size of sequence data... (0=no seq - FLM )<br />
word no_keys How many keys there are...<br />
.<br />
.<br />
.<br />
Padded to 32 bytes<br />
<br />
<br />
Video frames<br />
------------<br />
16 words of palette, 1 word for each colour 0 to 15<br />
(the palette data is in the AMIGA format... xxxxrrrr/ggggbbbb).<br />
8000 bytes of picture per frame, no. of frames in header.<br />
<br />
Audio data<br />
----------<br />
8 bit signed samples, size of sample in header.<br />
<br />
Sequence data<br />
-------------<br />
No. of bytes given in the header. Each byte represents 1/10s interval.<br />
0 = no event, 128+key = event<br />
<br />
Key data<br />
--------<br />
No. of keys as given in the header, each key definition contains the<br />
following:<br />
<br />
word start_frame First video frame for this key<br />
word last_frame Last video frame for this key<br />
word video_speed Speed of video for this key (see table)<br />
long audio_start Offset to start of audio for this key<br />
long audio_length Length of audio for this key<br />
word audio_rate Sample speed of this key (Hz) 0=audio off<br />
byte video_loop Flag - loop video<br />
byte audio_loop Flag - loop audio<br />
<br />
<br />
Speed of video playback<br />
-----------------------<br />
Value PAL NTSC Units<br />
-------------------------------------<br />
0 25 30 frames/second<br />
1 12 15 frames/second<br />
2 8 10 frames/second<br />
3 6 7 frames/second<br />
4 4 5 frames/second<br />
5 3 3 frames/second<br />
6 2 2 frames/second<br />
7 1 1 frame/second<br />
8 2 2 seconds/frame<br />
9 3 3 seconds/frame<br />
10 4 4 seconds/frame<br />
11 5 5 seconds/frame<br />
12 6 6 seconds/frame<br />
13 7 7 seconds/frame<br />
14 8 8 seconds/frame<br />
15 9 9 seconds/frame<br />
</pre><br />
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