Transcoding is done to video and audio creative files when uploaded directly to the Amobee DSP. When an MP3 file is uploaded as an audio creative, the Amobee DSP will create WAV, OGG, WebM, and MP4 versions of the creative. After this process is complete, you will receive a confirmation email that the creative is ready to use. No transcoding is possible for third-party hosted VAST and VPAID tags.