What Does the ATEM Mini Pro ISO Do That the Standard Pro Does Not

ISO recording, short for isolated recording, refers to the simultaneous capture of each individual camera input as a separate video file during a live multi-camera production. A standard video switcher records only the program output — the single switched feed containing the selected camera angles and transitions. An ISO-capable switcher records every input independently, preserving the full signal from each camera regardless of which source was active in the live program at any given moment.

The Blackmagic Design ATEM Mini Pro ISO is a four-input HDMI live production switcher that adds ISO recording, multi-track audio capture, and automatic DaVinci Resolve project file generation to the same feature set found in the standard ATEM Mini Pro. The standard ATEM Mini Pro records only the program output. The ATEM Mini Pro ISO records the program output plus all four HDMI inputs simultaneously, totaling five video streams.

Key Differences Between the ATEM Mini Pro and ATEM Mini Pro ISO

The ATEM Mini Pro and ATEM Mini Pro ISO share identical physical dimensions (246 x 161 x 56 mm), the same four HDMI inputs with standards conversion, the same HDMI program output, the same Ethernet-based streaming (RTMP/SRT), the same USB-C webcam output, and the same audio mixer, keyers, transitions, and media pool. Every live switching and streaming feature available on the standard Pro exists on the Pro ISO.

The Pro ISO adds three capabilities not present on the standard Pro:

1. Five-stream video recording (four ISO inputs plus the program output), all captured simultaneously to a USB-C external drive as H.264 .mp4 files.
2. Six-track audio recording, with each HDMI embedded audio pair and each analog audio input saved as a separate 24-bit 48 kHz WAV file.
3. Automatic generation of a DaVinci Resolve project file (.drp) containing the complete timeline of the live production, with all cuts, dissolves, and media pool graphics mapped and linked to the recorded ISO files.

The ATEM Mini Pro retails at $295 USD. The ATEM Mini Pro ISO retails at $495 USD (Blackmagic Design, current MSRP as of 2025). The $200 price difference corresponds directly to the ISO recording, multi-track audio, and DaVinci Resolve integration features.

How ISO Recording Works on the ATEM Mini Pro ISO

The ATEM Mini Pro ISO records each of its four HDMI inputs as a clean feed. A clean feed contains only the raw camera signal without downstream keys, graphics overlays, lower thirds, or transition effects applied during the live production. Each ISO stream is encoded in H.264 at up to 70 Mb/s and saved as an .mp4 file on the connected USB-C external drive.

The fifth recording stream is the program output — the same switched feed that the standard ATEM Mini Pro records. This file captures the live edit exactly as it was switched, including all transitions, graphics, and effects. The program stream records at the bitrate configured in the streaming quality settings.

All five video streams record simultaneously to a single USB-C SSD. The six audio streams (four HDMI embedded stereo pairs plus two analog stereo inputs) record as individual 24-bit 48 kHz WAV files alongside the video. This separation enables complete audio remixing in post-production — adjusting levels, removing noise, or rebalancing sources that could not be corrected during the live event.

DaVinci Resolve Project File Integration

The ATEM Mini Pro ISO generates a DaVinci Resolve project file (.drp) automatically during every recording session. This file saves to the same USB-C drive alongside the video and audio recordings. Opening the .drp file in DaVinci Resolve reconstructs the entire live production as a multi-track editing timeline.

The generated project file contains the complete sequence of cuts and dissolves as they occurred during the live switch. Media pool graphics, including lower thirds and titles, load into the Resolve media pool and appear at their correct positions on the timeline. Every clip on the timeline links back to its corresponding ISO recording file, enabling direct replacement of any shot with an alternate camera angle.

DaVinci Resolve (including the free version) supports the Sync Bin feature on the Cut Page, which displays all synchronized ISO recordings in a multi-view layout. Scrolling through the timeline shows what each camera captured at that point in time. The Source Overwrite function replaces a shot on the timeline with the selected alternate angle, maintaining timecode sync automatically.

Organizations using Blackmagic Pocket Cinema Cameras or Studio Cameras gain an additional capability. The ATEM Mini Pro ISO transmits timecode and camera metadata over HDMI to connected Blackmagic cameras. Those cameras can simultaneously record in Blackmagic RAW at resolutions up to 6K. In DaVinci Resolve, the H.264 ISO files can be relinked to the Blackmagic RAW originals, enabling a 4K or 6K finished edit from a production switched in 1080p HD.

Storage Requirements for ISO Recording

ISO recording demands substantially more storage than program-only recording. Each ISO input stream records at up to 70 Mb/s. With four inputs and one program stream active, the combined data rate reaches approximately 350 Mb/s at 1080p60, consuming roughly 157 GB per hour of recording.

At 1080p30, a more common frame rate for church services, each stream records at approximately 45 Mb/s. Five streams at 45 Mb/s total approximately 225 Mb/s, consuming roughly 100 GB per hour. A 90-minute service at 1080p30 requires approximately 150 GB of storage.

The ATEM Mini Pro ISO records to USB-C 3.1 Gen 1 external drives formatted as ExFAT or HFS+. Solid-state drives (SSDs) are required for reliable multi-stream recording. Mechanical hard drives and USB flash drives lack the sustained write speeds necessary for five simultaneous H.264 streams. A 500 GB USB-C SSD provides sufficient capacity for a standard 90-minute service with margin. A 1 TB or 2 TB SSD accommodates extended events or multiple services without requiring data offloading between recordings.

The standard ATEM Mini Pro, recording only the program output at streaming quality (typically 10 to 40 Mb/s), uses approximately 4.5 to 18 GB per hour — a fraction of the ISO model’s storage consumption.

Use Cases Where ISO Recording Justifies the Price Difference

ISO recording provides measurable value in specific production scenarios. The following use cases represent situations where the $200 premium over the standard ATEM Mini Pro delivers a return.

Post-production editing of live events. Organizations that upload edited versions of services, conferences, or performances to platforms such as YouTube or Vimeo benefit from the ability to correct switching mistakes, swap camera angles, and refine edit points after the live event. The ATEM Mini Pro 2-Camera Streaming Kit provides an entry point for two-camera productions, and the ISO model enables post-production refinement of those same productions.

Content repurposing. A single multi-camera recording session can produce a full-length service video, short sermon clips for social media, worship music segments using close-up angles, and highlight reels. ISO recordings preserve every angle independently, making this extraction possible without additional recording equipment.

Volunteer-operated productions. Productions staffed by volunteers with limited live switching experience benefit from ISO recording as a safety net. Missed cuts or incorrect camera selections during the live event can be corrected in post-production. The ATEM Mini Pro 3-Camera Streaming Kit or ATEM Mini Pro 4-Camera Streaming Kit paired with the ISO model provides a complete multi-camera system with full post-production flexibility.

Audio remixing. Events requiring precise audio balancing — such as services with both spoken word and live music — benefit from the six separate WAV audio tracks. Each source can be independently processed, leveled, and mixed in post-production software.

High-resolution finishing. Productions using Blackmagic cameras that simultaneously record in Blackmagic RAW can relink ISO timeline clips to the camera originals in DaVinci Resolve, producing a 4K or 6K final output from a production switched in 1080p. The Move-4K 3-Camera PTZ Kit with ATEM Mini Pro demonstrates a multi-camera PTZ configuration compatible with the ATEM Mini Pro platform.

When the Standard ATEM Mini Pro Is Sufficient

The standard ATEM Mini Pro meets requirements for organizations that livestream without post-production editing, archive only the program output, and do not need individual camera recordings. If the live-switched output is the final product with no subsequent editing, the ISO recording capability provides no operational benefit. The ATEM Mini Pro 1-Camera Streaming Kit serves single-camera streaming setups where ISO recording is not applicable. Organizations that lack staff or volunteers to perform post-production editing also see no return from the ISO features, as the recorded ISO files and DaVinci Resolve project require someone to open and edit them.

Specification Summary