300GB of diskcache

[trungnt13]

the Composition layer never calls cull method to enforce the size limit for diskcache.
There is also no mechanism to clean up the cache after a long development which often results in hundred of GB of diskcache locally.

[FronkonGames]

+1

[robinkarlberg]

+1 Also having this problem.

[abdalrohman]

Cache Size Control Solution

When creating a composition, you can override the default cache behavior to control both the cache directory location and size limit. This helps prevent excessive disk space usage during video rendering.

Solution

from diskcache import Cache

composition = mv.layer.Composition(size=(width, height), duration=duration)
composition._cache = Cache(
    size_limit=1024 * 1024 * 1024,  # 1GB limit
    directory="custom_cache_dir"
)

Usage Example

class VideoScene:
    def __init__(self):
        self.cache_dir = "cache"
        self.cache_size = 1024 * 1024 * 1024  # 1GB
    
    def cleanup(self):
        # Clean up cache after rendering
        if os.path.exists(self.cache_dir):
            shutil.rmtree(self.cache_dir)
    
    def render(self):
        try:
            composition = mv.layer.Composition(...)
            composition._cache = Cache(
                size_limit=self.cache_size,
                directory=self.cache_dir
            )
            # ... render video ...
        finally:
            self.cleanup()