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DocsMedia Mogul

Docs · studio · media mogul

Cut the timeline. Package the render.

Media Mogul at /studio/video is a browser multi-track NLE: library, preview viewport, timeline, and export stub. Drag the playhead, razor-split clips, snap to the grid, zoom in close — then package the timeline for a render worker.

5: clip kinds
2: track kinds
1080p60: export profile
0: backend today

The session

Open the studio, load the timeline

The studio shell has four regions: library, preview, timeline, export. Clips carry a kind — gameplay, Blender render, fal.ai generation, music, or voiceover — and live on video or audio tracks with start offset, duration, trim window, volume, playback rate, opacity, and effects.

media mogul — timeline session

4 tracks

V1 · boss-fight.mp4 (gameplay)0:00–0:42

V2 · title-card (blender_render)0:42–0:48

A1 · synth-bed (music)vol 0.7

A2 · voiceover take 3trim 2s–31s

Walkthrough

Cut, trim, grade, preview

Work left to right: arrange, split, snap, zoom for precision, grade with effects, and watch the audio-clock preview. The preview never decodes whole videos into memory — it draws per-frame slates and video-element frames only.

Arrange clips on tracks
Place video kinds (gameplay, Blender, fal.ai) on video tracks and music/voiceover on audio tracks. Set each clip's start offset and duration; dial volume, opacity, and playback rate per clip.
Razor-split at the playhead
Drag the playhead to the cut point and split: one clip becomes two sharing the same source with complementary trim windows. Re-trim either side without losing media.
Snap and zoom
Leave snap-to-grid on while rough-cutting so clip edges align; zoom the timeline (pixels-per-second) to land frame-tight trims on the voiceover.
Grade with effects
Stack effects per clip: color_grade, blur, chroma_key, speed, or fade. Effects are data (type + params) on the clip — nothing is baked until render.
Preview on the audio clock
Press play and watch the preview viewport. Timing runs on the audio clock, so what you see stays in sync with what you hear.

Export

Package for the render worker

Export packages the timeline state into a versioned JSON envelope — version 1, export timestamp, target endpoint /api/compute/render-video, profile 1080p60 — for a headless FFmpeg worker to consume later.

Worked example

Cut a 45 second boss fight recap

A tight recap uses four tracks and five moves: lay the fight, title it, bed the music, ride the voiceover, then package. Total timeline shown below finishes at 48 seconds.

Lay the fight on V1
Place boss fight.mp4 from 0:00 to 0:42 on video track 1. Razor split at 0:18 to drop the wiped attempt, then re trim the surviving half open by 2 seconds to restore the winning parry.
Title it on V2
Overlay the Blender title card from 0:42 to 0:48 on video track 2 at full opacity. Keep it clear of the fight so the knockout frame breathes before the card lands.
Bed synth under A1
Lay the synth bed across the full 48 seconds on audio track 1 at volume 0.7. Add a fade effect over the last 3 seconds so the card does not end cold.
Ride the voiceover on A2
Trim voiceover take 3 to the 2s..31s window on audio track 2. Zoom the timeline to land the callout (now!) within a quarter second of the parry frame.
Package the envelope
Export the versioned JSON envelope with profile 1080p60 and target endpoint /api/compute/render video. Expect the fail open stub status today, and keep the envelope file for the day the FFmpeg worker accepts it.

Troubleshooting

Preview drift, silent audio, export rejects

The editor is deterministic data plus a live preview. When the preview disagrees with the timeline, the timeline is right and the preview clock or the clip params need attention.

Audio and video drift apart
Replay from the top. The preview runs on the audio clock, so scrubbing mid clip then playing can start a frame off. Return the playhead to zero, press play, and confirm sync before re trimming.
A clip is silent or invisible
Check track assignment first. Video kinds (gameplay, Blender, fal.ai) belong on video tracks and music plus voiceover belong on audio tracks. Then check trim windows, volume, opacity, and playback rate, since a zeroed param mutes a clip without any error.
Snap keeps stealing my trim
Snap to grid is a rough cut aid. Leave it on while arranging, then toggle it off for the final voiceover pass so sub second trims land where you drop them instead of where the grid pulls them.
Export says stub instead of rendering
Correct behavior in Wave 3. The studio packages the envelope and reports that no render backend exists yet. Save the JSON, do not re export repeatedly, and never promise a viewer an MP4 today.
Effects look baked but are not
Effects are params on the clip (type plus settings), so color grade, blur, chroma key, speed, and fade all travel with the envelope. Nothing renders until the worker exists, which means reordering effects never costs quality.

Loading article…

DocsMedia Mogul

Docs · studio · media mogul

Cut the timeline. Package the render.

5: clip kinds
2: track kinds
1080p60: export profile
0: backend today

The session

Open the studio, load the timeline

media mogul — timeline session

4 tracks

V1 · boss-fight.mp4 (gameplay)0:00–0:42

V2 · title-card (blender_render)0:42–0:48

A1 · synth-bed (music)vol 0.7

A2 · voiceover take 3trim 2s–31s

Walkthrough

Cut, trim, grade, preview

Arrange clips on tracks
Place video kinds (gameplay, Blender, fal.ai) on video tracks and music/voiceover on audio tracks. Set each clip's start offset and duration; dial volume, opacity, and playback rate per clip.
Razor-split at the playhead
Drag the playhead to the cut point and split: one clip becomes two sharing the same source with complementary trim windows. Re-trim either side without losing media.
Snap and zoom
Leave snap-to-grid on while rough-cutting so clip edges align; zoom the timeline (pixels-per-second) to land frame-tight trims on the voiceover.
Grade with effects
Stack effects per clip: color_grade, blur, chroma_key, speed, or fade. Effects are data (type + params) on the clip — nothing is baked until render.
Preview on the audio clock
Press play and watch the preview viewport. Timing runs on the audio clock, so what you see stays in sync with what you hear.

Export

Package for the render worker

Worked example

Cut a 45 second boss fight recap

A tight recap uses four tracks and five moves: lay the fight, title it, bed the music, ride the voiceover, then package. Total timeline shown below finishes at 48 seconds.

Lay the fight on V1
Place boss fight.mp4 from 0:00 to 0:42 on video track 1. Razor split at 0:18 to drop the wiped attempt, then re trim the surviving half open by 2 seconds to restore the winning parry.
Title it on V2
Overlay the Blender title card from 0:42 to 0:48 on video track 2 at full opacity. Keep it clear of the fight so the knockout frame breathes before the card lands.
Bed synth under A1
Lay the synth bed across the full 48 seconds on audio track 1 at volume 0.7. Add a fade effect over the last 3 seconds so the card does not end cold.
Ride the voiceover on A2
Trim voiceover take 3 to the 2s..31s window on audio track 2. Zoom the timeline to land the callout (now!) within a quarter second of the parry frame.
Package the envelope
Export the versioned JSON envelope with profile 1080p60 and target endpoint /api/compute/render video. Expect the fail open stub status today, and keep the envelope file for the day the FFmpeg worker accepts it.

Troubleshooting

Preview drift, silent audio, export rejects

The editor is deterministic data plus a live preview. When the preview disagrees with the timeline, the timeline is right and the preview clock or the clip params need attention.

Audio and video drift apart
Replay from the top. The preview runs on the audio clock, so scrubbing mid clip then playing can start a frame off. Return the playhead to zero, press play, and confirm sync before re trimming.
A clip is silent or invisible
Check track assignment first. Video kinds (gameplay, Blender, fal.ai) belong on video tracks and music plus voiceover belong on audio tracks. Then check trim windows, volume, opacity, and playback rate, since a zeroed param mutes a clip without any error.
Snap keeps stealing my trim
Snap to grid is a rough cut aid. Leave it on while arranging, then toggle it off for the final voiceover pass so sub second trims land where you drop them instead of where the grid pulls them.
Export says stub instead of rendering
Correct behavior in Wave 3. The studio packages the envelope and reports that no render backend exists yet. Save the JSON, do not re export repeatedly, and never promise a viewer an MP4 today.
Effects look baked but are not
Effects are params on the clip (type plus settings), so color grade, blur, chroma key, speed, and fade all travel with the envelope. Nothing renders until the worker exists, which means reordering effects never costs quality.

Cut the timeline. Package the render.

Open the studio, load the timeline

Cut, trim, grade, preview

Arrange clips on tracks

Razor-split at the playhead

Snap and zoom

Grade with effects

Preview on the audio clock

Package for the render worker

Cut a 45 second boss fight recap

Lay the fight on V1

Title it on V2

Bed synth under A1

Ride the voiceover on A2

Package the envelope

Preview drift, silent audio, export rejects

Audio and video drift apart

A clip is silent or invisible

Snap keeps stealing my trim

Export says stub instead of rendering

Effects look baked but are not

Cut the timeline. Package the render.

Open the studio, load the timeline

Cut, trim, grade, preview

Arrange clips on tracks

Razor-split at the playhead

Snap and zoom

Grade with effects

Preview on the audio clock

Package for the render worker

Cut a 45 second boss fight recap

Lay the fight on V1

Title it on V2

Bed synth under A1

Ride the voiceover on A2

Package the envelope

Preview drift, silent audio, export rejects

Audio and video drift apart

A clip is silent or invisible

Snap keeps stealing my trim

Export says stub instead of rendering

Effects look baked but are not