Azure AI Video Indexer support matrix and service limits

This article describes the supported formats and limitations of Azure AI Video Indexer.

Upload file size and video duration

File size limits

If uploading a file from your device, the file size limit is 2 GB.

If the video is uploaded from a URL, the file size limit is 30 GB. The URL must lead to an online media file with a media file extension (for example myvideo.MP4) and not a webpage such as https://www.youtube.com.

File duration limit

The file duration limit is 6 hours for all presets with the exclusion of the Basic Audio preset which has a file duration limit of 12 hours.

Index request limit

When uploading and indexing through the VI website, up to 10 videos can be indexed in a single request. When submitting requests through the API, there's an API request limit of 10 requests per second and up to 120 requests per minute.

Languages

See our Language support article for the list of languages supported.

When using single or multi language detection, there's a limit of 10 languages allowed for identification during the indexing of a media file. You can select the 10 languages.

OCR

Video Indexer has an OCR limit of 50,000 words per indexed video. Once the limit has been reached, no additional OCR results are generated.

Projects

The number of source files in a Project is limited to 10 when using the website and 100 when using the API.

Custom person models

Each Person model supports up to 1 million people and each VI account can have up to 50 Person models.

Logo detection

A logo group can contain up to 50 logos.

Supported file formats

Azure AI Video Indexer supports the following file formats:

File formats (file extensions)
FLV (with H.264 and AAC codecs) (.flv)
MXF (.mxf)
GXF (.gxf)
MPEG2-PS, MPEG2-TS, 3GP (.ts, .ps, .3gp, .3gpp, .mpg)
Windows Media Video (WMV)/ASF (.wmv, .asf)
AVI (Uncompressed 8bit/10bit) (.avi)
MP4 (.mp4, .m4a, .m4v)/ISMV (.isma, .ismv)
Microsoft Digital Video Recording (DVR-MS) (.dvr-ms)
Matroska/WebM (.mkv)
WAVE/WAV (.wav)
QuickTime (.mov)

Supported input video codecs

Input video codecs
AVC 8-bit/10-bit, up to 4:2:2, including AVCIntra, 8 bit 4:2:0 and 4:2:2
Sony XAVC / XAVC S (in MXF container)
Avid DNxHD (in MXF container)
DVCPro/DVCProHD (in MXF container)
Digital video (DV) (in AVI files)
JPEG 2000
MPEG-2 (up to 422 Profile and High Level; including variants such as Sony XDCAM, Sony XDCAM HD, Sony XDCAM IMX, CableLabs®, and D10), up to 420 profiles
MPEG-1
VC-1/WMV9
MPEG-4 Part 2
Theora
YUV420 uncompressed, or mezzanine
Apple ProRes 422
Apple ProRes 422 LT
Apple ProRes 422 HQ
Apple ProRes Proxy
Apple ProRes 4444
Apple ProRes 4444 XQ
HEVC/H.265 Main Profile

Supported input audio codecs

Input Audio Codecs
AAC (AAC-LC, AAC-HE, and AAC-HEv2; up to 5.1)
MPEG Layer 2
MP3 (MPEG-1 Audio Layer 3)
Windows Media Audio
WAV/PCM
FLAC
Opus
Vorbis
AMR (adaptive multi-rate)

Output format

Videos are transcoded to a single format and resolution (720p), mp4 H254 for video and AAC for audio.