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      Third-party VAST Specifications
      • 03 May 2023
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      Third-party VAST Specifications

      • Updated on 03 May 2023
      • 1 Minute to read
      • Contributors
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      Article summary

      Third-party VAST tags are supported. Please review the table below to ensure the VAST tags you intend to use with Transmit are compatible.  


      Transmit Traffic ContactJosh Kersner
      josh@transmit.live
      Third-party Hosted Video - Traffic Instructions
      * All tags must be SSL compliant (HTTP) Third-party tags must be able to serve via SSL (https://).
      All subsequent calls to third parties after the initial ad request must also use SSL.
      VAST2 (Desktop, Mobile, OTT):
      • VAST2 REQUIRED for Desktop, Mobile and OTT. 
      • H.264 (MP4) assets must be included in the VAST Tag
      • A minimum of three different bit rates need to be included. (Recommended bitrates are below)
      VAST TranscodesBit rateCodecsAcceptedMin DimensionsMax File SizeRequired for OTT and SSAI environments
      8 – 30 MbpsH.264 (MP4)1920x10801.7GB Max

      Transcodes listed below are required in all VAST tags

      Bit rateCodecsAcceptedMin Dimensions:15
      		:30
      3,000 kbps+H.264 (MP4)1280x7204.5MB9MB
      1,200 kbps+H.264 (MP4)854x4803.4MB7MB
      500 kbps+H.264 (MP4)640x3601.8MB3.5MB
      Audio Codec
      • Peak audio range between -12db and -24db Stereo
      • 44.1 -48kHz sampling rate
      • AAC-LC
      VPAIDNot supported
      Aspect Ratio16:9
      Ad Dimensions
      • 1920x1080
      • 1280x720
      • 854x480
      • 640x360
      Brand Safety Tags
      • Monitoring tags only. 
      • Blocking tags are not accepted
      Notes
      • Skippable ads are not accepted. Please DO NOT include .3GPP file format.
      • A maximum of 1 VAST wrapper redirects. 
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