---
title: sinkBuffersRequiredForStartup
framework: coremediaio
role: symbol
role_heading: Instance Property
path: coremediaio/cmioextensionstreamproperties/sinkbuffersrequiredforstartup-1bgyq
---

# sinkBuffersRequiredForStartup

The number of buffers the stream requires for startup.

## Declaration

```swift
@nonobjc var sinkBuffersRequiredForStartup: Int? { get set }
```

## Discussion

Discussion This property translates to the kCMIOStreamPropertyOutputBuffersRequiredForStartup property.

## See Also

### Configuring Sink Properties

- [sinkBufferQueueSize](coremediaio/cmioextensionstreamproperties/sinkbufferqueuesize-9b80c.md)
- [sinkBufferUnderrunCount](coremediaio/cmioextensionstreamproperties/sinkbufferunderruncount-1qmbb.md)
- [sinkEndOfData](coremediaio/cmioextensionstreamproperties/sinkendofdata-8fswu.md)