Record a game mod with its own audio, or combine existing clips into a short showcase for X or YouTube. Select highlights from timestamped image grids, then add animated titles, credits, transitions, music, and a watermark.
Record and cut a short showcase video of a game mod, or a compilation of clips, ready to post on X/YouTube. Records the game window with only the game's own audio, picks moments from contact sheets, and edits with one-line animated titles, creator credits, transitions, music, watermark and fade-out via an EDL JSON. Use when the user wants a demo video, trailer, clip or montage of a mod, or wants to combine existing clips into a styled video.
Review the instructions the agent will receive before you install.
A mod isn't finished until you can show it in 30 seconds. The toolchain is um win record (capture),
um video contact (look), um video compile (edit), all ffmpeg + Pillow.
um backup and restore it every take.capture_cursor=0).um win record --exe Game.exe --out C:\caps\take1 --seconds 40 # -> take1.mkv, take1.audio.raw, take1.json
um video first-frame C:/caps/take1.mkv # where gameplay starts (skips loading screens)
um video mux C:/caps/take1.mkv C:/caps/take1.audio.raw C:/caps/take1.json take1.mp4 [--offset 0.25]
--crop.um/ps1/ProcLoopback.ps1). Only the game is
recorded; no Spotify, no notifications. It's timestamped so the file position is wall time. Muxing uses
the recorded offset. Fine-tune with a visual/audio sync event (a flash vs its boom) and pass --offset.q, then wait off-thread. Write .mkv so a killed
recorder still leaves a playable file (see examples/terraria-tmodloader/reference/InModRecorder.cs).um video probe clip.mp4
um video contact clip.mp4 sheet.png --every 1.5 --cols 6 # a timestamped grid; read it, pick in/out points
um video contact clip.mp4 zoom.png --start 20 --end 30 --every 0.5
Pick the peak moments: the explosion, the boss reveal, the unit in formation. Write in/out times into the EDL.
um video compile edl.json out.mp4 (--preview renders half size and fast). The full format is in
um video --help.
{
"size": [1920, 1080], "fps": 30,
"theme": {"accent": "#B6FF3B"},
"transition": {"type": "fade", "duration": 0.3},
"clip_volume": 0.8,
"music": {"path": "music.mp3", "volume": 0.5},
"watermark": {"path": "logo.png", "height": 54, "corner": "br"},
"segments": [
{"clip": "take1.mp4", "in": 9.0, "dur": 3.0, "hook": "Terraria, but with a tactical nuke."},
{"clip": "take1.mp4", "in": 24.2, "dur": 4.5, "title": "Tactical Nuke", "transition": {"type": "pixelize"}},
{"clip": "take2.mp4", "in": 3.0, "dur": 5.0, "title": "Drone Mothership boss"},
{"card": {"title": "Fal Arsenal", "sub": "a Terraria mod"}, "dur": 2.5}
]
}
cut.fill: blur (blurred backdrop), crop or pad.speed and volume, zoom to punch in past UI, crop [x, y, w, h] to reframe.um fal music "..." --seconds 60 makes a bed. Set bpm and use beats instead of dur to
cut on the beat; um video beats music.mp3 estimates tempo and first beat.credit: "@handle") and in the
post, and ask permission when it's promotional. Don't imply their clips were made with your tool. Download
only public posts, and only what you'll use.No reviews yet. Tell others what you thought.
No login needed. Share how it worked for you, ask a question, or note where it did not run.
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Prepare generated or hand-drawn artwork for a game's required file layout, dimensions, colors, and transparency. Create sprite sheets, assemble animation frames, and render 3D models into consistent views for use as game images.
Create game assets through fal.ai, including sprites, textures, 3D models, sound effects, music, voices, and video clips. Guides consistent visual variations, file conversion, model selection, and generation records so assets can be traced and regenerated.
Launch and control a real game to verify mods through screenshots and logs. Automate menus, keyboard and mouse input, and repeatable test scenes, with guidance for connecting an agent to game state through a JSON bridge.
Investigate an installed game before making a mod. Identify its engine, available mod loaders, save locations, anti-cheat protection, and compatibility issues, then record a practical approach and unresolved questions in MODDING_PLAN.md.
Research game modding methods and tools across public websites and archived pages. Recover information from dead forum links, compare reports, and produce findings with source URLs, version details, credibility notes, and clearly identified gaps.
Build mods that combine content or gameplay from different games. Choose between content ports, two games exchanging data, embedded game engines, or rewritten rules, with clear integration plans and checks against the original behavior.