File size and bitrate, published by platforms only
TikTok states a 500 MB ceiling and a 516 kbps floor. None of the 15 tools in this register publishes the file size or bitrate of its output, although two publish megabyte ceilings on what may be uploaded to them, so the constraint cannot be checked before generating. As of 2026-09-12.
| Item | What is published | Detail |
|---|---|---|
| Platform ceiling | 500 MB or less | Bitrate 516 kbps or more |
| Tools publishing output file size | None of fifteen | Not on any page read here |
| Tools publishing output bitrate | None of fifteen | Resolution is published instead |
| Tools publishing upload ceilings | Two of fifteen | Runway and HeyGen, for inputs |
Inclusion rule. File constraints stated on the platform's help page or on the tool's own priced page. Figures obtained by generating a clip and inspecting it are outside this register. Order. Platform first, then the tool side.
1Resolution is published because something depends on it
Fourteen of the 15 rows publish a resolution, either because each tier costs a different amount or because a model card was written to report what the weights produce. File size and bitrate are consequences of encoding choices nobody charges for and no card reports, so nobody documents them.
The result is that the spec the platform asks about is the spec the tool side is silent on, which holds across priced pages and documentation pages alike rather than being a quirk of one vendor.
2In practice the ceiling is generous and the floor is low
Five hundred megabytes is a large file for a short vertical ad, and 516 kbps is a low bitrate. It is unlikely that any tool here produces output that violates either, and the two rows that publish megabyte figures at all are describing uploads going the other way: 32MB for a video into Runway by URL, 100MB into HeyGen.
Unlikely is not the same as published, which is why the rows say not published rather than compliant. A register that filled those cells with a reasonable guess would be making the strongest claim on the page out of the weakest evidence.
3What a production can do about it
Generate one clip at the intended settings and look at the file. That answers the question definitively for that tool at that tier on that day, which is more than any published page offers.
This register does not do that, because a figure from one clip on one account would be presented as a property of the product and would be wrong as soon as an encoder setting changed.
- File size500 MB or less, with a bitrate of 516 kbps or more, as .mp4, .mov, .mpeg, .3gp or .avibitrate and formats
- Resolutions offered480p, 720p and 1080p
- Resolutions720p, 1080p and 4Kpriced per step
4From brief to placement
For ad work around “File limits”, SceneMixer's pages explain how its ad projects are produced:
You can recomposite with different end-card text, and in step-by-step mode you can reshoot individual segments. The finished file can also be downloaded and shared with a link.
SceneMixer, How to Make an Ad from One Photo — “Can I change the ad after it is finished?” (read 2026-10-13)
An AI short drama is a serialized show of 60–120 second vertical episodes whose cast, sets and footage are generated by AI. Making one takes six steps: analyze the script into episodes, lock a consistent cast with reference art, localize for your market, write and edit storyboards, generate each 4–15 second shot, then composite and publish.
SceneMixer, How to Make an AI Short Drama, Step by Step (read 2026-10-13)
5Sources
Format requirements come from Google Ads Help and tool limits from each vendor page listed on published limits, both read 2026-09-12. The rule against mixing the two is on method. Nearby: Ten seconds, Shape first, Resolutions.