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Amiga Format CD43 (1999)(Future Publishing)(GB)(Track 1 of 2)[!][issue 1999-09].iso
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vmpeg.readme
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1999-06-15
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95 lines
Short: WarpOS port of MPEG2 video decoder
Author: frank@phoenix.owl.de (Frank Wille)
Uploader: frank@phoenix.owl.de
Version: 0.1
Type: gfx/show
Requires: CSPPC or BPPC, WarpOS V4 (powerpc.library V15), AHI
vmpeg is another MPEG1/2 video player, based on the public source of
the MPEG Software Simulation Group.
The last days I checked all MPEG players for the Amiga, but found no
one which is able to play a standard 352x288 MPEG movie with sound
in real time. This one does (at least on my 604e/233) !
FEATURES
- Cybergraphics/Picasso96 support (8-bit dithered or 15/16/32 bit
true color).
- Audio support via ahi.device unit 0.
- Tries to run at natural frame rate. When it's running too fast,
the player will wait after every frame, and when running too slow it
will start skipping B-frames. This should prevent interruptions of
audio output.
- Fps counter display.
- Time code display.
- Backward/Forward seek function. You can scan through the whole
movie by using the mouse.
- Several work-arounds to be compatible with all movies I have seen.
- Compiled by latest vbcc in highest optimization mode.
- Some PPC Assembler optimizations.
USAGE
To view a movie with sound enabled just type
vmpeg -o4 -s -b cd0:movie.mpg
A screen mode requester will open where you can select your prefered
resolution. 8 bit screens automatically force dithering mode. You should
define a screen mode with a resolution of 352x288 pixels. vmpeg runs
best at 16 bits.
Pressing the right mouse button will display the current time code.
When moving the mouse right or left, while holding the right button,
you can seek for/backwards in the MPEG stream. Move the mouse very
slowly! The stream is seeked in multiples of 1 MB. By watching the
time code you should easily find the position where you last stopped
watching the movie.
Backwards seeking is nearly unusable with FastFileSystem in large
files, but works very well with others, like a CD-FileSystem.
To quit, press the left mouse button.
For more options, you may start vmpeg without arguments to get a
complete list.
BUGS
- Amiga-native screen modes were not tested!
- Slow down of fast movies could work better, when having sound enabled.
- True color display modes doesn't support other chroma formats
or interlaced movies. Haven't seen those, though.
- Fps counter seems to be wrong in fast movies (?).
SOURCE
Full source code is included. To recompile, you need the latest vbcc
compiler and a make-program (the makefile is very simple, so that
most makes should work). If you have problems, try a lower optimization
mode, or write me to get a compiler update.
LEGAL
vmpeg is freeware, of course.
Frank Wille 06-Jun-1999 frank@phoenix.owl.de