Runway is one of the third-party providers FlopCoin can route a generation job to. It covers video, image, and audio from a single account, and jobs are fulfilled asynchronously: we submit the job, poll it until it finishes, then hand back the finished file.
What Runway can make
- Video from a still image - Gen-4 Turbo and Gen-3 Alpha Turbo.
- Video from text - no input image needed.
- Video editing and restyling - Gen-4 Aleph takes an existing clip as input.
- Images - Gen-4 Image and Gen-4 Image Turbo.
- Upscaling - for both images and video.
- Performance and lip-sync - Act-Two drives a character from a reference video or an audio track.
- Audio - text to speech, and sound effects generated from a text prompt.
Audio, and why you do not need a separate voice account
Runway hosts ElevenLabs Multilingual v2 natively behind its own text-to-speech endpoint, so speech generation runs on Runway credits rather than a second subscription. You can also create a custom voice, either designed from a text description or cloned from an audio sample, and then pass that voice when generating speech. Sound effects are a separate call that takes a plain text prompt.
Limits worth knowing before you spend credits
- No transparency. Every Runway model returns an opaque H.264 MP4. There is no alpha channel on any model. If you need a transparent result, generate against a flat background colour and key it afterwards.
- Clip length is 5 or 10 seconds. Nothing in between, nothing longer.
- First and last keyframes are not universal. Only Gen-3 Alpha Turbo accepts a first and last frame pair, and only at 1280:768 or 768:1280. Gen-4 Turbo rejects a second keyframe even though it is advertised, so a job that needs a defined ending has to use Gen-3 Alpha Turbo.
- Aspect ratios are fixed per model. Passing one the model does not support fails the job rather than resizing it.
- Jobs sometimes fail for no reason. Runway tasks can come back failed with a generic error and succeed on an immediate retry. Retry once before treating a failure as real.
Checking the account
The provider exposes a credit balance and a per-model rate limit, so you can confirm the account is funded and see how many jobs may run at once before submitting anything.
Third-party fulfilment
Some FlopCoin services are fulfilled on our own infrastructure and some are fulfilled by third-party providers such as Runway. Data you submit for generation is passed to whichever provider fulfils the job, and you should have no expectation of privacy in anything you submit. For specific details, or a current list of the third-party providers we use, email legal@acquisitioninvest.com.