Twitch Vertical Video Ads (Online Video) ads are vertical 9:16 video clips, measured at 1080×1920 px, up to 500 MB per file, up to 30 seconds long, delivered as MP4. They run in the In-Stream & Mobile Feed placement on Twitch. Encode with H.264 video with AAC audio at 23.976 fps for clean playback across devices.
| Dimensions | 1080 × 1920 px |
|---|---|
| Aspect ratios | 9:16 |
| Orientation | portrait |
| Max file size | 500 MB |
| File types | MP4 |
| Max duration | 30 sec |
|---|---|
| Video codec | H.264 |
| Frame rate | 23.976 fps |
| Video bitrate | 8000 kbps |
| Audio codec | AAC |
| Audio channels | stereo (2) |
| Audio bitrate | 192 kbps |
| Sample rate | 48000 Hz |
Twitch Vertical Video Ads (Online Video). Lengths 6s, 15s, 20s, and 30s. Site-served resolution 1080×1920 (360×640 for third-party served). Minimum bitrate 4 mbps (2 mbps third-party), recommended 8 mbps. Max file size 500 MB (site served only). Frame rate 23.976 (recommended), 24, 25, or 29.97, constant. Minimum audio bitrate 192 kbps (128 kbps third-party), audio sample rate 44.1 or 48 kHz, minimum 2 audio channels, audio target –9 dB. Video H.264, MPEG-2, or MPEG-4; audio AAC.
Official source: https://advertising.amazon.com/resources/ad-specs/twitch/twitch-vertical-video-ads