# kVTDecompressionPropertyKey_OutputPoolRequestedMinimumBufferCount The requested minimum buffer count that a decompression session should use for its output pixel buffer pool, without releasing buffers while the number in use is below this level. ``` let kVTDecompressionPropertyKey_OutputPoolRequestedMinimumBufferCount: CFString ``` ## Discussion This property effectively requests that the key be used for the creation of the output . For general playback cases, standard age-out behavior is sufficient, and this property isn’t necessary. Use this property only in unusual playback scenarios where a peak pool level is known, and the potential memory overhead is an acceptable tradeoff to avoid possible buffer reallocation. Setting this property to `NULL` or passing in the value `0` clears this setting and removes the minimum buffer count. Setting this property while a decompression session is in use results in the creation of a new . Setting this property causes new buffers to be allocated, and existing buffers to be deallocated when they are released. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)