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Frequently Asked Questions
What frame rates are supported?
Brollr can import footage at virtually any frame rate — including high-speed sources like 120 and 240 fps. It automatically detects your source rate and offers valid conversion options. For export, it supports 23.98, 24, 25, 29.97, 30, 50, 59.94, and 60 fps. High-speed footage can be slowed down with perfect integer ratios (e.g., 120→60, 60→30). NTSC and integer rate families are kept separate to ensure correct conversions.
How do I set up FTP credentials?
Go to the Upload tab, tap the settings gear icon, and enter your BlackBox FTP username and password. Credentials are stored securely in your device's Keychain and are only used to connect to portal.blackbox.global.
What are the file size and duration limits?
Brollr supports importing clips of 5 seconds or longer. For BlackBox uploads, file size limits are 4 GB for 4K footage and 3 GB for HD. Clip duration should be 5–59 seconds, with 10–20 seconds being the sweet spot for stock footage that sells well.
How does AI keywording work?
Brollr compresses a sample of your video and sends it to an AI service for analysis. It returns a title, description, and up to 49 relevant keywords. You can add optional context (location, scene description) before generating. Review and edit everything before accepting.
How do I manage my subscription?
Subscriptions are managed through your Apple ID. On your iPhone or iPad, go to Settings → your name → Subscriptions. From there you can change plans, cancel, or restore purchases.
What video formats and resolutions are supported?
Brollr can import any video format your iPhone or iPad can read — including H.264, H.265 (HEVC), ProRes, and more. It exports in H.264 (up to 30 fps) or H.265 (up to 60 fps) as MP4. Supported resolutions include 720p, 1080p, 4K, and DCI 4K in both landscape and portrait orientations. HDR footage (PQ and HLG) is detected and handled automatically.
Why is audio stripped from exports?
BlackBox requires stock footage without audio. Brollr automatically removes audio during export to meet this requirement — you don't need to do anything extra.