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veejay/veejay-current/veejay-server/doc/README.memory

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STATIC FX CHAIN
Veejay pre-allocates a large buffer (aprox. 180 MB for 1280x720 video) to cache the entire fx_chain.
If you wish to turn off this option, you can use the -X or --dynamic-fx-chain commandline parameters.
When dynamic allocation is enabled, each chain entry is allocated and freed on the fly between switching samples.
Individual FX are always allocated and freed between switching samples.
MEMORY CACHE
Veejay can (optionally) use your RAM to cache video frames from file to memory. By default this option is turned off.
you can enable it by specifying both the -m and -l commandline parameters. They both expect arguments.
Enter a percentage of your total phsyical RAM memory to use for -m and divide it equally over -l slots.
These options will allow you to commit the frames from the sample's EDL to memory while playing, so that subsequent loops no longer require disk-access.
This option should help you increase the audio playback quality when using the FX chain (reducing or elminating stutter)