International Master Video File Specifications

Extreme Reach provides multiple solutions for uploading creative assets to your account. Whether you choose to upload spots via the Media Uploader Application or through the web-based platform, all files must meet the specifications in this document before they can be accepted.

To help ensure that your files are seen and heard exactly as you intend them to be, please review and follow the detailed specifications below.
Verifying the playout of your final digitized files locally prior to uploading to Extreme Reach is imperative.

Video Specifications

  MXF OP1a (MXF) MXF OP1a (MXF) MOV (Quick Time)
Codec XDCAM HD422 IMX50 / IMX30 IMX50 / IMX30
Format Profile 422P@HighLevel 422P@MainLevel Default
Frame Size 192x1080 720x576 - Active Picture
720x608 - with VBI
750x576 - Active Picture
720x608 - with VBI
Display Aspect Ratio 16:9 16:9 16:9
Frame Rate 25fps 25fps 25fps
Interlacing Upper Field First Upper Field First Upper Field First
Bit Rate 50 MBPS 50 Mbps / 30 Mbps 50 Mbps / 30 Mbps
Chroma Subsampling 4:2:2 4:2:2 4:2:2
Gop Length 12 (M=3, N=12) 1 (N=1), I Frame Only 1 (N=1), I Frame Only

Audio Specifications

  MXF OP1a (MXF) MXF OP1a (MXF) MOV (Quick Time)
Format PCM (Little Endian) PCM PCM
Channels 2 (1 Channel per stream) 2 (1 Stereo Pair) 2 (1 Stereo Pair)
Sample Rate 48 KHz 48 KHz 48 KHz
Bit Depth 16 / 24 Bit 16 / 24 Bit 16 / 24 Bit


Clock (Slate): 7 seconds
Black: 3 seconds
Spot: 10/15/30/60 seconds etc.

  • No post-roll such as black, hold, or freeze is required.
  • For non-UK deliveries and Republic of Ireland, slates are optional.

All Clock / Slates must include the following information:

  • Advertiser
  • Clock Number
  • Title
  • Duration

Clock Number format

Requirement for metadata Ad Code field


Slates are system generated from metadata and analysis of the source media. This ensures that all information required by UK DPP Spec is included. Original slates are not passed through.

Video Levels

Levels must be in accordance with ITU BT.601 for SD content, ITU BT.709 for HD content, and in accordance with EBUR103 recommendations.


The program loudness level must be normalized to -23 LUFS (+/- 0.5 LU) and -1 dBTP max.

  • UK Specifications require the first 6 frames and the last 6 frames of the spot to be mute. Please be advised content will need an audio mix that meets this specification.
  • Multi-channel audio is accepted please reach out to Extreme Reach support for further information.

Audio Dialogue

Best practice for a globally acceptable audio mix regarding dialogue is to start and end dialogue 12 frames on ‘into and out of content’.

If someone is talking during the very beginning or tail of the spot it may get cut off. In this instance, a new audio mix will be required from the post house.

Closed Captioning/Subtitling

World System Teletext (or WST ) is the standard for encoding and displaying Teletext information, which is used as the standard for Teletext throughout Europe today. It was adopted into the international standard ITU-R BT.653. For HD OP-47 is accepted, and for SD OP-42 is accepted.


Any questions?

Contact us at or 800.324.5672 for a more personal discussion regarding your workflow and needs.


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