The standard export settings for any book trailer are 1080p Full HD (1920×1080 pixels) at 30 frames per second, encoded with the H.264 codec in an MP4 container. These settings guarantee compatibility across YouTube, Facebook, Instagram, TikTok, and Amazon while maintaining sharp visual quality. If you plan to distribute on social media, you should also export a vertical 9:16 version at 1080×1920 pixels — vertical video consistently receives greater organic reach on short-form platforms.
- What Resolution and Aspect Ratio Should Your Book Trailer Be?
- What Bitrate Do You Need for a Sharp Book Trailer?
- Why H.264 in an MP4 Container Is the Universal Standard
- What Frame Rate Should You Export Your Book Trailer At?
- What Are the Export Specs for Each Platform?
- Why You Need Two Versions of Every Book Trailer
- Frequently Asked Questions
What Resolution and Aspect Ratio Should Your Book Trailer Be?
For your primary horizontal trailer, export at 1920×1080 pixels (16:9 aspect ratio) — this is standard 1080p Full HD. For vertical social media versions, export at 1080×1920 pixels (9:16). These two resolutions cover every major distribution platform a self-published author needs.
Resolution refers to the pixel dimensions of your video frame. A higher resolution means more detail, but it also means larger file sizes and longer upload times. While 4K (3840×2160) is technically supported by YouTube and Facebook, it offers no practical advantage for book trailers. Book trailers typically feature text overlays, still images, and slow transitions — content that looks identical at 1080p and 4K on a phone screen or embedded web player.
The aspect ratio is equally important. YouTube, Amazon product pages, and Facebook feed videos all expect 16:9 horizontal video. Instagram Reels, TikTok, and YouTube Shorts expect 9:16 vertical video. Uploading a horizontal video to a vertical platform results in a small, letterboxed frame that viewers scroll past. According to Instagram’s own Reel size and aspect ratio guidance, Reels accept aspect ratios between 1.91:1 and 9:16, but 9:16 fills the full screen and receives significantly more engagement. For more on choosing trailer length and shape, see our guide to book trailer length and aspect ratio.
What Bitrate Do You Need for a Sharp Book Trailer?
For 1080p at 30fps, aim for a bitrate between 8 and 12 Mbps. This range produces a visually sharp video that uploads quickly and stays within every platform’s file size limits. Bitrate matters more than resolution for perceived video quality — a 1080p video at 12 Mbps looks noticeably better than a 4K video compressed down to 4 Mbps.
Bitrate measures how much data is used per second of video. Higher bitrate means more detail is preserved, but the file gets larger. YouTube’s published floor for standard 1080p uploads at 30fps is 8 Mbps, according to its recommended upload encoding settings; these are minimums, so exporting a little higher (10 to 12 Mbps) gives YouTube’s re-encoder extra headroom and produces a cleaner final result. Facebook recommends 4,500 to 9,000 Kbps (roughly 4.5 to 9 Mbps) for 1080p video. TikTok’s recommended range is 6 to 8 Mbps, though TikTok transcodes all uploads down to approximately 7 Mbps for distribution regardless of what you upload.
For Amazon, the placement available to most indie authors is the video slot on your Author Central profile (Amazon A+ Content video is reserved for brand-registered sellers, which most self-publishers are not). Author Central accepts files up to 500 MB, so bitrate management still matters: a 60-second trailer at 10 Mbps produces a file of roughly 75 MB, well within the limit, but a 90-second trailer at 15 Mbps would reach about 168 MB, and a high-bitrate audio track pushes it higher. Keep your bitrate at 8 to 10 Mbps for Amazon uploads to stay safely under the cap.
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Why H.264 in an MP4 Container Is the Universal Standard
H.264 encoded in an MP4 container is the single safest codec and format combination for book trailers. Every major platform — YouTube, Instagram, TikTok, Facebook, and Amazon — accepts H.264 MP4 files without transcoding issues or quality loss.
A codec is the algorithm that compresses your raw video data into a manageable file. H.264 (also called AVC) has been the industry standard for over a decade and is supported by virtually every device and platform. Its successor, H.265 (HEVC), produces smaller files at the same quality, but platform support is inconsistent — some browsers and older devices cannot decode it, and not all social platforms accept it directly.
The container (MP4, MOV, AVI) is the file wrapper that holds the compressed video and audio streams. MP4 is universally accepted. MOV files — Apple’s native container — are accepted by most platforms but occasionally cause metadata issues on non-Apple systems. Unless you have a specific reason to use MOV, stick with MP4. If your editing software exports as MOV by default, check your export settings for an MP4 option before rendering.
For audio within your trailer, export as AAC-LC at a sample rate of 48 kHz. This is the audio codec and sample rate recommended by YouTube, Facebook, and Amazon. Most editing software sets this by default when you select an MP4 export preset.
What Frame Rate Should You Export Your Book Trailer At?
Export at 30 frames per second (fps) for maximum compatibility. If your source footage was shot or rendered at 24fps, export at 24fps instead — matching your export frame rate to the original footage avoids motion artifacts and duplicate frames.
Frame rate determines how many individual images are displayed per second. The three common rates each have a distinct visual character. 24fps produces the classic cinematic look familiar from feature films — slightly dreamlike with natural motion blur. 30fps is the broadcast standard, looking clean and immediate. 60fps creates ultra-smooth motion that works well for fast action but can feel unnaturally fluid for a mood-driven book trailer with music.
For book trailers — which typically combine text cards, still photography, slow pans, and atmospheric footage — 24fps or 30fps both work well. The key rule is consistency: never mix frame rates within a single project. If you purchased stock footage at 24fps and your text animations render at 30fps, your editing software will need to convert one to match the other, and that conversion can introduce judder. Set your project timeline to one frame rate at the start and stick with it.
YouTube accepts 24, 25, 30, 48, 50, and 60fps. Instagram and TikTok require a minimum of 30fps. If you plan to distribute the same trailer on both YouTube and Instagram, 30fps is the safest choice.
What Are the Export Specs for Each Platform?
Each platform publishes its own recommended specifications, though the differences are smaller than they appear: 1080p resolution, 30fps, and H.264 in an MP4 container work everywhere, and only the aspect ratio, bitrate, and file-size ceiling really change. The table below summarises the settings that matter for self-published authors distributing book trailers, followed by platform-specific notes.
| Platform | Resolution / aspect ratio | Frame rate | Bitrate | Max length | Max file size |
|---|---|---|---|---|---|
| YouTube | 1920×1080 (16:9) | 24 to 60fps | 8 Mbps floor (10 to 12 recommended) | No practical limit | 256 GB |
| Instagram Reels | 1080×1920 (9:16) | 30fps minimum | 8 to 12 Mbps | Up to 3 min recommended | ~4 GB |
| TikTok | 1080×1920 (9:16) | 30fps | 6 to 8 Mbps | 10 min (app) | 287 MB (app) |
| 1920×1080 (16:9) or 9:16 | 30fps | 4.5 to 9 Mbps | No practical limit | 4 GB | |
| Amazon Author Central | 1920×1080 (16:9) | 30fps | 8 to 10 Mbps | 10 min | 500 MB |
YouTube
YouTube’s published floor for 1920×1080 at 30fps is 8 Mbps using H.264 in an MP4 container; exporting at 10 to 12 Mbps is a safe choice that leaves headroom for the re-encode. For 4K uploads, YouTube recommends 44 to 56 Mbps at 30fps, but as noted above, 4K is unnecessary for book trailers. YouTube accepts frame rates of 24, 25, 30, 48, 50, or 60fps and recommends encoding at the native frame rate of your original footage. Audio should be AAC-LC at 48 kHz.
Instagram Reels
Instagram requires a minimum of 720p at 30fps but recommends 1080×1920 (9:16 vertical) for Reels. Target a bitrate of 8 to 12 Mbps. Reels can now run up to 3 minutes (longer uploads from the camera roll are possible, but Instagram does not recommend Reels over 3 minutes to new audiences), so a 15 to 60 second book trailer sits comfortably inside the length that gets surfaced. Vertical 9:16 video fills the entire screen and receives substantially more organic reach than horizontal or square formats.
TikTok
TikTok recommends 1080×1920 vertical video at 30fps with a bitrate of 6–8 Mbps. TikTok transcodes all uploads to approximately 7 Mbps for its feed, so uploading at a higher bitrate than 8 Mbps yields no visible improvement. Keep files under 287 MB for uploads from the mobile app or under 4 GB for desktop uploads.
Facebook recommends 1920×1080 at 30fps with a bitrate of 4,500–9,000 Kbps. The maximum recommended bitrate is 15 Mbps, and the maximum file size is 4 GB. Facebook accepts both 16:9 horizontal and 9:16 vertical video; vertical video autoplays in the mobile feed and tends to receive more engagement.
Amazon Author Central
Amazon Author Central accepts MP4 (and several other formats) with a minimum resolution of 1280×720 (720p); 1080p is recommended. The maximum file size is 500 MB and the maximum length is 10 minutes, and processing can take up to 24 hours after upload. For the best quality within the size limit, export at 1920×1080, 30fps, 8 to 10 Mbps. The finished video appears on your Author Central author page, which readers reach by clicking your author name on any of your book’s product pages; it is not embedded directly on the product detail page.
Why You Need Two Versions of Every Book Trailer
Every self-published author should export at least two versions of their book trailer: a horizontal 16:9 cut and a vertical 9:16 cut. This is not optional if you plan to promote on social media — it is the single most impactful distribution decision you can make.
The horizontal version (1920×1080) is your primary trailer for YouTube, your Amazon product page, your website, and Facebook link posts. The vertical version (1080×1920) is built for Instagram Reels, TikTok, and YouTube Shorts — the three platforms where short-form video reaches new readers most effectively.
Creating the vertical version does not mean simply cropping the horizontal one. Text overlays need to be repositioned, imagery may need to be reframed, and pacing often benefits from being tighter on short-form platforms. Most editing software — including DaVinci Resolve (free), Adobe Premiere Pro, and even Canva — allows you to create a second sequence or project at 1080×1920 and re-edit your existing assets into the vertical frame. Budget 30–60 minutes of additional editing time for the vertical cut.
Consider also exporting a 15–30 second micro teaser from the most compelling section of your trailer. These ultra-short cuts perform well as captioned social clips and can be used as paid ad creatives or organic posts to drive viewers to the full trailer.
Frequently Asked Questions
Can I upload a 4K book trailer to YouTube?
Yes, YouTube supports 4K (3840×2160) uploads, but it provides no practical benefit for book trailers. The text overlays, still images, and slow transitions typical of book trailers look identical at 1080p and 4K on most screens. Exporting at 4K quadruples your file size and upload time for no visible quality gain.
What happens if I upload a horizontal trailer to Instagram Reels?
Instagram will display it in a small letterboxed frame within the vertical Reels player, with large black bars above and below. This significantly reduces visual impact and engagement. Always export a dedicated 1080×1920 vertical version for Reels.
Does TikTok reduce my video quality after upload?
Yes. TikTok transcodes all uploads to approximately 7 Mbps regardless of the original bitrate. Uploading at 6–8 Mbps minimizes the quality loss from this recompression. Uploading at much higher bitrates does not result in a sharper video on TikTok’s platform.
What is the best free software for exporting a book trailer with these settings?
DaVinci Resolve (free version) provides full control over resolution, frame rate, codec, and bitrate export settings. It supports both H.264 and H.265 encoding, handles 1080p and 4K timelines, and allows you to create separate horizontal and vertical sequences from the same project.
How do I add my book trailer to my Amazon author page?
KDP authors add a trailer through Amazon Author Central, not the product page directly. On the Author Central profile, choose to add a video, upload an MP4 (under 500 MB and under 10 minutes), and confirm you hold the rights; processing can take up to 24 hours. The video then appears on your Author Central author page, which readers reach by clicking your author name on any of your book’s product pages. (Amazon A+ Content video is a separate placement reserved for brand-registered sellers, which most self-publishers are not.)
