Supported Asset File Types & Codecs

List of file types you can label on Ango Hub

File Types

The following are the file types that can be annotated on Ango Hub:

Category	Supported File Types
Audio	.mp3, .wav, .ogg
Image	.jpg, .jpeg, .png, .tif, .tiff, .bmp, .webp
Video	.mp4, .webm, .mov, .mkv
Text	.txt, .md
Document	.pdf
Medical Imaging	.dcm, .nrrd, .nii, .nii.gz

NRRD files must be compatible 3D medical volumes. See NRRD File Compatibility for the exact NRRD files Ango Hub can and cannot open.

Because .mov playback support can vary by operating system and browser, Ango Hub cannot guarantee that every .mov file will play correctly on every device. When possible, prefer .mp4 files encoded with H.264 for video labeling workflows.

Audio and video files must have a constant bitrate.

Otherwise, annotation timings may not be correct in the final export.

Frame-specific annotations not officially supported on videos with variable frame rate (VFR)

Ango Hub can import and open VFR videos, but frame-level annotation on Variable Frame Rate (VFR) videos is not supported.

For details on what is affected, how the in-product warning works, and what we recommend instead, see Variable Frame Rate (VFR) Video Compatibility.

NIfTI Loading Errors

If a .nii.gz file is incomplete or corrupted and cannot be decompressed, Ango Hub shows a specific error in the Medical labeling editor. A file that is not a valid NIfTI volume shows a separate error.

Check that the source file is complete and valid, then upload a valid copy. Use Go to the Assets on the error screen to return to the project's Assets tab.

Codecs

For the MP4 format, the supported codec is H.264.

Ango Hub supports all codecs supported by your web browser. See this link to the MDN Web Docs for more.