Runway API guides
Practical write-ups for developers and buyers: how it works, how to call it, and how to keep the cost down.
Editing Video with Runway Aleph 2 over API — Request Format and Limits
How video-to-video editing works with Runway Aleph 2 via API: the input_video_url field, prompt requirements, the 30-second input cap, and how editing is billed.
Runway Gen-4.5 API Guide: Text & Image-to-Video Examples
Call Runway Gen-4.5 over REST: model id, text-to-video and image-to-video requests, duration handling, host behaviour, pitfalls and side-by-side model tests.
Runway vs Kling vs Veo API: How to Choose Between Them
Compare Runway, Kling and Veo for API use: access model, input modes, host breadth, editing support and failover, plus a harness to test them on your prompts.
Video-to-Video Editing API Options: Aleph 2 and Alternatives
Compare video editing models callable by API: Runway Aleph 2, Kling v3 Omni, Grok Imagine edit and Pikadditions. Request shape, limits, how to choose.
Runway Gen-4.5 Python Tutorial: Generate, Poll and Save Video
Build a Python client for runway/gen-4.5: create a job, poll safely, save the file, handle duration snapping, 429s and failures. No Runway account needed.
Runway Aleph 2 Prompts for Reliable Video Edits via API
Prompt patterns for runway/aleph-2 video edits: input_video_url, the 30-second cap, one change per request, preserving what stays and keeping iteration cheap.
Runway Aleph 2 30-Second Limit: Trim, Split and Stitch
runway/aleph-2 accepts inputs up to 30 seconds. ffmpeg commands to trim or split long footage, keep edits consistent across segments, and stitch the results.
Runway Image-to-Video API: start_image_url Workflow
Use start_image_url with runway/gen-4.5 to animate a still: prep the image, write a motion-only prompt, submit the job and verify the result before scaling.