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Preroll technical specifications

1. The maximum video duration is 30 seconds;
2. The maximum file size is 10Mb
3. Video dimensions must be 640x360.
4. It's recommended to not use the bottom 10% of the video for placing important information as far as the place will be used for player's controls
5. Stream requirements:
   - Video bitrate 400-450kbps (up to 25fps).
   - Audio bitrate 80-100kbps (up to 30db)
   - Total bitrate should be 480-550kbps
6. Accepted file formats:
   MP4 (MPEG-4): H.264 codec for video, AAC codec for audio.
7. Video should not lead users to misunderstanding with imitation of UI, etc..
   

Portal has the right to decline placement of advertising materials if they do not comply with portal’s policies