Third-party VAST Specifications

  • Updated on May 3, 2023
  • Published on Dec 5, 2022
  • 1 minute(s) read
  • JS
 Prev Next

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.