Accessing External Timecode from Blackmagic ProDock in Custom App

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artemskikh OP
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Hi everyone,

I’m exploring using the iPhone 17 Pro with the Blackmagic ProDock in a custom capture app. The genlock functionality seems accessible via AVExternalSyncDevice and related APIs, which is great.

I’m specifically curious about external timecode coming in from the ProDock: • Is there a public way to access the timecode feed in a custom app via AVFoundation or another Apple API? • If so, what is the recommended approach to read or apply that timecode during capture? • Are there any current limitations or entitlements required to access timecode from ProDock in a third-party app?

I’m excited to start integrating synchronized capture in my app, and any guidance or sample patterns would be greatly appreciated.

Thanks in advance!

— [Artem]

Answered by Media Engineer in 864299022

Yes! Use AVCaptureTimecodeGenerator and find the source of type AVCaptureTimecodeSourceTypeExternal in the availableSources when the BlackMagic ProDock is connected.

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artemskikh OP

I guess my question is - would this API call with blackmagic prodock connected - show it as an available source? https://developer.apple.com/documentation/avfoundation/avcapturetimecodegenerator/availablesources

Media Engineer OP
Apple
Accepted Answer

Yes! Use AVCaptureTimecodeGenerator and find the source of type AVCaptureTimecodeSourceTypeExternal in the availableSources when the BlackMagic ProDock is connected.