Third-Party Served Ad Formats

In addition to our site-served, custom all-screen Creatives, we can also accommodate creative bookings that are served by a third-party.


Tremor Video recommends observing these specifications when submitting assets for third-party video ad serving.

If your ad tag can support multiple media files, feel free to include a larger video file; the media file that is most appropriate for the resolution of the device will deliver to the impression.

Specifications for All Ad Format Types

The specifications in this section apply to all third-party ad formats: Desktop, Mobile Web, CTV*, and Mobile In-App.

Video Length: 90 seconds, max

Frame Rate: 24 or 30 FPS

Recommended Codecs: H.264 codec, De-interlaced or Progressive only

Codecs Not Accepted: DVCPRO-HD and HDV 1081i60

Video Dimensions: 16 x 9 aspect ratio, 1280×720 (HD) maximum

File Type: MP4

Min Audio Bit-rate: 128kbps / 44khz (64k~128k @ 44.1kHz or higher)

Max Video File Size: 25 MB

Expected Video File Size: 1.5-20 MB (Exception: CTV is 4.5-20 MB)

Expected Video Bit-rate: 300 to 5,000 kbps (Exception: CTV is 1,000 to 5,000 kbps)

CTV Note: Please include multiple files at different bitrates, ranging from 1,000 – 5,000 kbps (Additional bitrate versions also OK)

Ad Tag Delivery: by Ad Format Type

Ad Format Type: Ad Tags Available

CTV: VAST Video (MP4)





*Additional Ad Specifications for the CTV Ad Format

  • CTV ads will not play without the ACC audio format.
  • CTV ads will only play on the following connected devices: Apple TV, HbbTV, LG, OpenTV, MHP, Panasonic, Philips, Roku, Samsung, Toshiba.

Specifications for Ad Delivery to Screens (by Video Format)

Note that desktop screens can only display Desktop ad formats, CTV screens can only display CTV ad formats, but phone and tablet screens are able to display both Mobile Web and Mobile In-App ad formats.

Video SizeDesktopPhoneTabletCTV
360pYesYesAd will not deliverAd will not deliver
480pYesYesYesAd will not deliver
1080pYesAd will not deliverYesYes

Delivery Specifications for Each Video Size

Video SizeWidthHeightVideo BitrateAudio BitrateExpected file size
360pYesYesAd will not deliverAd will not deliver1.5 to 3 MB
480pYesYesYesAd will not deliver2.5 to 4.5 MB
720pYesYesYesYes4.5 to 9 MB
1080pYesAd will not deliverYesYes10 to 20 MB

Delivering to Mobile Screens

Tremor Video DSP recommends including at least one < 3MB media file in your ad tag when delivering to a mobile in-app screen. This limitation helps to standardize user experience across different connection speeds such as 3G, 4G, LTE, wifi, and so on.

When the video file size is larger than 3MB, there can be a 1-2 second delay in loading the video ad, which can cause some mobile publishers to abandon the ad, causing use rate issues for the delivery of this placement.

Companion Banner Specifications for Third-Party Ads

Companion banners served with desktop and mobile web third-party ad tags have their own requirements:
• These specifications are for when a third-party hosts the companion banner.
• Third-party ad tags in iFrames with a no-script image call for Flash-based environments are preferred.

Available forDesktop and Mobile Web ONLY
Companion Banner Sizes300×250, 728×90, 120×600, 160×600, 300×60, 300×100
File Typesjpg or gif, animated gif files accepted
Code acceptediFrame, javascript, HTML, and href / img src code
Companion Banner File Size75K


User-Initiated Sound Settings: When a third-party serves the ad, user-initiated sound settings cannot be configured by the advertiser; that setting is always configured by the publisher that requests the ad.