Codecs
HAP / HAP Q / HAP Alpha, ProRes 422/4444, H.264, H.265, VP9 WebM, GIF, PNG sequence. CRF slider for H.264/H.265/VP9.
Example: 0 GBfor a 60s 4K clip as HAP Qsys:// video pipeline for vj workflows
MaSeL Converter
Converts videos for VJ playback, archiving, web output and loops. One app, no terminal.
HAP · ProRes · H.264 · H.265 · VP9 · GIF · PNG-Seq // Luma/Chroma-Keying · 3D-LUT · Trim/Speed/Reverse · Crossfade-Loops · Batch
What's new
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Codecs
HAP Q, ProRes 4444, H.265 …
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Filter
Luma · Chroma · 3D-LUT
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Phone-Home
No tracking. No ads.
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Offline
Native app · auto-update
Render Pipeline · Live
FFmpeg · 3 parallel streams
HAP
0%
ProRes 422
0%
H.264
0%
What the app can do
Six areas, all in the GUI — no FFmpeg command in the terminal needed.
Keying & LUT
Luma key, chroma key with despill, 3D LUT (.cube/.3dl) for color grading and Log→Rec.709 conversion.
Example: 0 sgreen-screen live previewClip Tools
Trim, speed 0.25×–4×, reverse, crossfade loop with phase-bar preview.
Example: 0max. crossfade loopResolution & FPS
Original / 4K / 1080p / 720p / 480p / Custom. 24 / 25 / 30 / 60 / 120 fps. Letterbox for mismatched aspect ratios.
Example: 0max. frame rateQueue & Batch
Drag-and-drop, whole folders, custom settings per job, retry, reorder by drag, output paths per job.
Example: 0clips without UI freezeMerge & Image Sequence
Merge compatible jobs into one file (stream copy, no re-encode). Or render PNG sequences into a clip with FPS/duration/fade.
Example: 0with stream-copy mergeDetails for every feature
Click an area — instructions, tips, real-world examples.
Choose a codec
Encoding tab- Open the codec dropdown in the Encoding tab.
- HAP / HAP Q / HAP Alpha for GPU playback in Resolume. ProRes 422 / 4444 for editing and mastering. H.264 / H.265 / VP9 for the web.
- For H.264/H.265/VP9 the CRF slider (0–51) appears. Lower = better/larger.
Example: 4K footage for a Resolume live set → HAP Q. Output is .mov with real-time playback and no CPU load.
Resolution & FPS
Encoding tab- FPS dropdown: Original / 24 / 25 / 30 / 60 / 120.
- Resolution dropdown: Original / 4K / 1080p / 720p / 480p / Custom.
- Custom reveals your own width/height fields. Mismatched aspect ratios are fitted with letterboxing.
Example: Normalize clips in 4K, 1080p, 720p → 1920×1080 @ 30 fps.
Audio & Strip Audio
Audio tab- Codec: None / PCM 16-bit / AAC / Opus.
- Strip Audio removes the audio track entirely.
Tip: HAP, GIF and PNG sequence never have audio.
Example: Silent HAP loop for audio-reactive triggers → HAP. Web clip with original sound → H.264 + AAC.
Keying & LUT
Filters tab- Enable filters via switch.
- Luma Key removes by brightness. Chroma Key by color (color picker or green/blue), sliders for similarity/softness, optional despill.
- 3D LUT loads a .cube or .3dl file.
Tip: Keying needs an alpha codec: HAP Alpha, ProRes 4444 or PNG sequence.
Example: Green-screen performance as an overlay → HAP Alpha, chroma green, similarity 0.3, softness 0.05, despill on.
Clip Tools
Clip Tools tab- Trim: start and duration (HH:MM:SS or seconds).
- Speed: 0.25×–4×.
- Reverse: switch — loads the whole clip into RAM.
- Crossfade loop: switch + frame count (2–240, max. 45% of length). Loop preview shows the phase bar at 0.5×/1×/2×.
Tip: Loop is disabled for GIF/PNG sequence.
Example: Seamless 2-second loop → 8-frame crossfade, loop preview, render HAP.
Queue & Batch
Queue window- Add: drag-and-drop or browse.
- Order: drag the ⠿ handle.
- Edit: clicking a row loads its settings into the panel.
- Controls: ✕ cancel · ↺ retry · ⌖ open output folder.
Tip: Thumbnails are extracted serially and progress updates are throttled — even 50+ clips won't freeze the app.
Render as Single Video (Merge)
Merge- At least 2 jobs with the same codec, resolution and FPS (no GIF/PNG sequence).
- The “Render as Single Video” toggle appears automatically.
- Enable and start: phase 1 renders each clip, phase 2 joins them into one file without re-encoding.
Presets
Sidebar- Master presets are built-in defaults (HAP, ProRes, H.264 …).
- Save a custom preset: “+” in the sidebar or “⊕ Save all Settings” in the Output tab.
- Apply: click the preset row. ✎ rename, ✕ delete.
Image Sequence → Video
Sidebar- Open Sidebar → “Image Sequence → Video”.
- “+” adds images, ↑↓ sorts, ✕ Clear empties the list.
- Set FPS, Duration (seconds per image), Fade in and Fade out.
- “Add to Queue” renders. Editable again later via ✎.
Output
Output tab- Folder empty = output next to the source. Set it via Browse.
- Save name per job; empty = keep original name.
Tip: If the path already exists, the app appends _2, _3 … — nothing is overwritten.
Updates
Auto-update- On launch the app checks automatically for new versions. When an update is available an orange UPDATE badge appears in the top right.
- Clicking opens the patch notes; the download saves the .zip to ~/Downloads/ and opens Finder.
- Check manually: Sidebar → About → “Check”.