Subtitle Muxer 0.2.0

Subtitle Muxer 0.2.0

Beta. Feature work is largely in place; this round is polish and day-to-day muxing. Still a pre-release. Please report issues.

This beta is for the mux you actually run: keep the target’s existing subs if you want them, edit a track’s title and flags before you hit Mux, cancel a job that is taking too long, and get a short reason when something fails instead of only “check the log.”

Copy subtitle tracks from a source video onto a target video (for example an original rip with softsubs onto an upscaled version that has none) with no re-encoding (stream copy). FFmpeg is bundled. No separate install is required for normal use.

Which file should I download?

Platform	Download
Windows (portable)	SubtitleMuxer-0.2.0-windows-portable.zip (extract and run the .exe)
Windows (installer)	SubtitleMuxer-0.2.0-windows-setup.exe (run the Setup wizard)
Mac (Apple Silicon)	SubtitleMuxer-0.2.0-mac-apple-silicon.tar.gz
Mac (Intel)	SubtitleMuxer-0.2.0-mac-intel.tar.gz
Linux (Ubuntu)	SubtitleMuxer-0.2.0-ubuntu.tar.gz
Linux (Debian)	SubtitleMuxer-0.2.0-debian.tar.gz
Linux (Linux Mint)	SubtitleMuxer-0.2.0-mint.tar.gz
Linux (Fedora)	SubtitleMuxer-0.2.0-fedora.tar.gz
Linux (Arch)	SubtitleMuxer-0.2.0-arch.tar.gz

Extract the archive if needed, then run Subtitle Muxer. On Windows you can run the Setup .exe to install instead.

What's new in 0.2.0

Added

• Pre-mux Keep both / Source only when the target already has soft subtitle tracks (skipped if it has none). Keep both retains the target’s existing subs and adds the selected Source tracks.
• Support window (header button beside About): Report an issue (GitHub issue template chooser) and manual Check for updates (GitHub Releases API; never on launch).
• After a successful mux: Open folder (reveals the file) and Play (system default player).
• Source and Target file dialogs remember their last folders independently between sessions (separate from the default save folder).
• Mux failures show a short reason (Permission denied, Disk full, or subtitle/container mismatch: try MKV) instead of only “check the log.”
• Cancel on the mux button while a job is running. Stops FFmpeg, logs that it was cancelled, and removes a half-written output file.
• Edit on a Source subtitle track: title, language (picked by name), Default, and Forced, written into the muxed file.
• Pre-mux duration mismatch warning when source and target lengths differ by 2+ seconds (confirm to continue).
• Pre-mux MP4 incompatibility warning when selected subtitle codecs are unlikely to stream-copy into MP4 (suggests MKV; confirm to continue).
• App icon in the title bar and About.

Fixed

• Windows title-bar icon uses the app .ico instead of the default Tk cube.
• Subtitle track list no longer shows a scrollbar when nothing needs scrolling.
• Removed the duplicate app title/version and tagline from the main window body (version stays in the title bar and About).
• Block mux when Source and Target are the same file, or when the destination would overwrite either input.
• Windows Open folder after mux now opens the correct Explorer folder.

What's included

• Source and Target file pickers (browse or drag-and-drop)
• Subtitle track list (language, format, title); select which tracks to copy
• Edit for title, language (by name), Default, and Forced
• Remembered destination folder and filename
• Output as MKV (recommended) or MP4
• Built-in FFmpeg log panel
• About and Support (report an issue, manual update check)
• Bundled FFmpeg

Tips

• Prefer MKV when possible. Some subtitle formats (ASS, PGS, and others) do not copy cleanly into MP4.
• Soft subtitle tracks can be copied. Burned-in subtitles, or closed captions baked into the video stream, cannot be extracted this way.
• If a track does not appear in the list, that file likely has no separate subtitle streams.

License

MIT