For video on demand, your video content must either be preconditioned or able to be conditioned by Ad Manager.
Learn more about content conditioning and how to manage mid-roll ads for video on demand.
Group of pictures (GOP) size
Media must be encoded with a keyframe every 2 seconds or GOP (group of pictures) size of 2 seconds. Content is prepared for mid-roll ad break insertion at the closest keyframe. If there is no keyframe within one second of cue point, insertion of ads beyond a second from cue point will lead to a poor user experience during playback. To prevent this, if a keyframe cannot be found within one second of the indicated cue point, an ad break will not be inserted.
It's recommended that you provide 1-2 seconds of creative blacks around the cue points for seamless transition between content and ads. This gives a fade-to-black TV experience around the ad breaks.
Closed captions
The following closed caption formats are supported:
- Input formats: TTML (sidecar), WebVTT (sidecar), CEA 608/708, WebVTT - HLS
- Output formats: TTML (sidecar), WebVTT (sidecar), WebVTT - HLS
Ad Manager converts the input format to output format.