Apps
Stable

M4VStudio

Native Windows app for inspecting, tagging, chaptering, subtitle handling, and remuxing MP4-family video files.

  • C#
  • WinUI 3
  • FFmpeg
  • TagLib#

Screenshots

Windows

Windows screenshots will be added soon

Overview

M4VStudio provides a focused native interface for working with MP4, M4V, and MOV media using FFprobe, FFmpeg, and TagLib#. It is designed for practical video-library workflows such as metadata review, tagging, chapters, subtitles, and safe remuxing without relying on command-line steps.

Key features

  • Embedded video, audio, and subtitle stream inspection
  • Stream-copy remux to MP4, M4V, and MOV
  • MP4-style tags and cover art read/write
  • Chapter editing with ffmpeg stream copy
  • Subtitle conversion including bitmap OCR paths
  • Job queue for remux, metadata, and chapter tasks

Platforms

Windows

Coming soon
  • C#
  • WinUI 3
  • FFmpeg
  • TagLib#

Focused native Windows interface for MP4, M4V, and MOV files. FFmpeg handles probe, remux, chapters, and OCR frame extraction. TagLib# handles MP4-style metadata. Work runs as queued jobs for remux, metadata, and chapter tasks.

Help

Opening MP4-family files, inspecting streams, and queuing remux or metadata work.

Getting started

Open M4VStudio on Windows and add an MP4, M4V, or MOV file. Inspection and processing run locally.

Inspecting streams

Review embedded video, audio, and subtitle streams before you change tags, chapters, subtitles, or the container.

Tags, chapters, and remux

Read and write MP4-style tags and cover art, edit chapters with stream copy, convert subtitles including bitmap OCR paths, or remux with stream copy to MP4, M4V, or MOV.

Job queue

Remux, metadata, and chapter tasks run through a job queue so you can line up work instead of driving each FFmpeg step yourself.

Troubleshooting

  • If a file will not open, confirm it is an MP4-family container the app supports.
  • Stream copy cannot fix a source that is already invalid. Check the job result before replacing an original.

Support

For product questions or to report a problem, email contact@h61apps.com or use the H61 Apps contact page.

Include the app name (M4VStudio), platform, version or build, system version, and what happened.

Contact support

Technical details

FFmpeg handles probe, remux, chapters, and OCR frame extraction. TagLib# handles MP4-style metadata. Self-contained Windows App SDK deployment for unpackaged builds. Windows only; no macOS or iOS version.