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Learn about the most common reasons for creative rejections in CTV and streaming audio. Address these issues to prevent rejections and ensure optimal delivery.
The bitrate of a video asset, measured in kilobits per second (Kbps), indicates the amount of video data transferred over time. This bitrate impacts both the size and quality of the video; a lower bitrate results in lower video quality.
Reason for Rejection:
A low bitrate is responsible for 72% of video rejections managed by EMG. Videos with low bitrates often suffer from poor visual quality (blurriness, low image resolution), which fails to meet streaming platform standards.
Solution:
To meet bitrate requirements, ensure the XML request of the VAST Tag includes media files within the following bitrate ranges:
The VAST Tag must contain one file in each of these bitrate ranges: one between 5,000 kbps – 10,000 kbps, one between 10,000 kbps – 20,000 kbps, and one between 20,000 kbps – 30,000 kbps. This approach ensures the video maintains high image quality and meets the standards required for successful delivery across all streaming platforms. Files outside these bitrate ranges may be rejected, impacting campaign delivery.
Duplicate frames occur when the same still image is repeated within a video asset, causing noticeable stutters or hiccups.
Reason for Rejection:
Videos are rejected for duplicate frames if more than one identical still image frame is detected. This issue accounts for 7% of all video creative rejections managed by EMG. Duplicate frames create visual stutters, degrading the video quality and negatively impacting the viewer experience. Platforms reject videos with duplicate frames due to their poor visual quality.
Solution:
To resolve a duplicate frame rejection, re-edit the video asset to remove any duplicate frames. Replace these with new still image frames to ensure the video meets the duration requirements and maintains high visual quality.
The duration of a video creative refers to the total playback time of the video file.
Reason for Rejection:
Incorrect duration accounts for 3% of video rejections managed by EMG. A video asset is rejected for this reason if it does not meet the exact millisecond requirement. Specifically, the video must be precisely 00:30:000. Even a slight deviation, such as 00:30:001, will result in automatic rejection, preventing the video from being delivered for 00:30:000 ad placements.
Solution:
To resolve duration issues, trim the video asset to exactly 00:30:000 to ensure it meets the duration requirements for acceptance and successful delivery. For precise measurement, we recommend using the Kapwing measurement tool, which allows you to view the creative’s duration to the millisecond.
To address a low audio bitrate, ensure the audio within the video is uploaded in its highest possible quality. The minimum acceptable bitrate is 192 Kbps, with an audio sample rate of at least 48 kHz. This will achieve clear and high-quality audio that meets platform
Reason for Rejection:
A low audio bitrate accounts for 3% of total video rejections managed by EMG. Videos with low audio bitrate are rejected because the audio quality is insufficient—often appearing muffled or choppy— and does not meet streaming platform standards.
Solution:
To address a low audio bitrate, ensure the audio within the video is uploaded in its highest possible quality. The minimum acceptable bitrate is 192 Kbps, with an audio sample rate of at least 48 kHz. This will achieve clear and high-quality audio that meets platform
The duration of a video asset should be exactly 00:30:000. Any deviation from this duration can lead to issues with playback and acceptance by publishers.
Reason for Rejection:
Incorrect duration is responsible for 96% of audio rejections managed by EMG. An audio asset is rejected if it does not precisely meet the required duration, which must be exactly 00:30:000. Even a minor exceedance, such as 00:30:001, will result in automatic rejection and prevent the audio from being used for 00:30:000 ad placements.
Solution:
To resolve duration issues, trim the audio asset to exactly 00:30:000 to ensure it meets the duration requirements for acceptance and successful delivery. For precise measurement, we recommend using the Kapwing measurement tool, which allows you to view the creative’s duration to the millisecond.
Ensure the audio bitrate in the video is consistent. Variable bitrates can cause fluctuations in audio quality, affecting the overall viewer experience.
Reason for Rejection:
4% of audio rejections occur because the bitrate does not meet the requirements, specifically when the bitrate is variable rather than constant. Platforms require a constant bitrate because it ensures optimal performance for time-sensitive encoding. A variable bitrate can cause encoding issues, leading to rejection and preventing the audio from being delivered to ad inventory.
Solution:
To correct a variable bitrate, the production or creative team must re-encode the audio asset with a constant or fixed bitrate. This adjustment is necessary for the audio asset to meet platform requirements and be accepted for delivery.
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