Video transcoding in the Asset Library

At this time, Studio only supports transcoding for Standard Rich Media creatives, not VPAID or VAST.

How to transcode videos in your Studio creative

When you upload videos to the Assets tab, Studio automatically encodes a single video file into four resolutions for each available video output format. This is called transcoding. Studio transcodes files into HD 1080p, HD 720p, 480p and 360p for MP4 and WEBM formats. On iOS devices, videos are automatically served via HTTP Live Streaming (HLS).

Transcodes don't serve by default, you have to turn them on for each video.

1. Upload your video to Asset Library. Your video will automatically get transcoded into 11 versions depending on the source file's dimensions. Some smaller dimensions, such as 300x200, may only get transcoded into 360p. For more details, see the File specifications and limits section, below.
2. Turn transcodes on for serving by selecting your video in the Asset Library, then flipping the transcodes switch on in the Details panel.
3. Add the video to your creative: On the "Creatives" tab, go into your creative and click Add. By clicking Add, you'll pick your video directly from the Asset Library. The video's type is "video bundle", which refers to all transcodes as one asset.
4. Set the video source in your creative with the Studio Enabler.
   Studio doesn't support setting transcoded video or audio source files directly in the video tag. Always use the Enabler to set the source file for the following file types: .mp3, .wav, .wma, .mp4, .m4v, .webm.

During live serving, Studio will serve the correct video. For example, a .webm file in Chrome, an .mp4 in Safari. The highest available resolution will be served by default, but you can select a different resolution from the Details panel in Asset Library if you need to reduce your video's file size.

File specifications and limits

Formats for transcoding and serving

Studio transcodes and serves uploaded source files that are in the following formats: .mp4, .m4v, .webm

Formats for transcoding only

You can also transcode from the following formats but they won't be available for serving: .avi, .mov, .mpeg, .mpg, .wmv, .ogg, .ogv

Minimum source dimensions for each transcode format

• *360p: 640 × 360
• 480p: 854 × 480
• HD 720p: 1280 × 720
• HD 1080p: 1920 × 1080

*The minimum dimensions for 360p is a recommendation: Studio will still generate a 360p transcode even if you upload dimensions below the minimum listed here. The minimum dimensions for 480p, 720p, and 1080p are requirements: Studio will not generate those transcodes if you upload files with lower dimensions.

Uploaded file size limit

You can upload files up to 60 MB but note that publishers may require smaller files.

Output transcode dimensions

Format	640 × 360	854 × 480	1280 × 720	1920 × 1080
MP4
WebM

HTTP Live Streaming (HLS) for iOS devices

Asset Library generates HTTP Live Streaming (HLS) transcodes automatically when you upload your video. HLS dynamically adjusts movie playback quality to match the available speed of wired or wireless networks on iPhones or iPads only.

HLS video playback is automatically enabled for iOS devices. To disable HLS video playback, uncheck the HLS checkbox in your video's Details panel in Studio's Assets tab.

View the list of transcodes

You can view the list of transcodes in the asset's Details panel on the Assets tab. This is also where you can enable transcodes for serving, preview them, download individual transcodes, or download a zip of all transcodes together.

Transcodes not created by Studio

If you need a transcode that Studio doesn't automatically create, you'll need to transcode the file yourself and upload it to the Assets tab.