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* README.memory --> README.memory.md * Adpat content from HowtoCache into README.memory * Remove HowtoCache
51 lines
1.8 KiB
Markdown
51 lines
1.8 KiB
Markdown
Memory concern with veejay
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===============
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Dynamic or Static FX chain
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-----
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Veejay pre-allocates a large buffer (aprox. 180 MB for 1280x720 video) to cache
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the entire fx_chain.
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If you wish to turn off this option, you can use the `-M` or `--dynamic-fx-chain`
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commandline parameters.
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When dynamic allocation is enabled, each chain entry is allocated and freed on
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the fly between switching samples.
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Individual FX are always allocated and freed between switching samples.
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```
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-M / --dynamic-fx-chain Do not keep FX chain buffers in RAM (default off)
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```
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Caching video frames
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--------
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Veejay can (optionally) use your RAM to cache video frames from file to memory.
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By default this option is turned off.
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You can enable it by specifying both the `-m` and `-l` commandline parameters.
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They both expect arguments.
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Enter a percentage of your total physical RAM memory to use for `-m` and divide
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it equally over `-j` samples.
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These options will allow you to commit the frames from the sample's EDL to
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memory while playing, so that subsequent loops no longer require disk-access.
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This option should help you increase the audio playback quality when using the
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FX chain (reducing or elminating stutter)
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The cache size is limited to the amount of RAM available in your machine. If the
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cache is full, Veejay must decide which frames to discard. Veejay will discard
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the frame furthest away from the current position.
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You can configure the cache with two commandline options:
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```
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-m / --memory <num> Maximum memory to use for cache (0=disable, default=0 max=100)
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-j / --max_cache <num> Divide cache memory over N samples (default=0)
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```
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The second option, `-j` is used to divide up the cache memory into a number of
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equal sized chunks. Veejay will cache by default up to 8 samples into your
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system's main memory, if you specified the `-m` option.
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