Aegisub vs Gaupol

Aegisub is a free, open-source tool for creating and modifying subtitles on Linux, macOS, and Windows. Its audio interface includes waveform and spectrum views for timing subtitles, while video mode previews edits as they are made. Visual controls on the video frame let users position, rotate, scale, and clip subtitles. Aegisub imports and exports several subtitle formats, including MPEG-4 Timed Text and MicroDVD, and it supports subtitle translation. Editing aids include a translation assistant, spell checking, a thesaurus, syntax highlighting, and macros. The Automation module runs Lua scripts for macros and export filters. Multi-level undo and redo, autosaving, backups, and emergency recovery saving are included. Direct saving to SRT is blocked when override tags would lose information, though the Export dialog can export to SRT. Aegisub does not create DVD subtitles directly; its FAQ describes using an external program to convert SSA to VOBSubs. The optional update checker sends anonymous operating-environment details, including an IP address, and can be left disabled. Version 3.5.0 is listed for download.

Gaupol is free subtitle-editing software for creating and translating text-based subtitles, timing them to video, and correcting common errors. It supports multiple subtitle formats and lists SRT and VTT export. A built-in video player is available, with an option to launch an external player. Gaupol is Free Software under the GNU General Public License, with a free plan priced at free. Linux is the current availability listed by the maker, with Flatpak, source code, and packages for most popular distributions. Windows installers are no longer built; the latest Windows version is 1.3.1 and its built-in player is disabled. The integrated player uses GStreamer, and additional plugins are recommended for broader container and codec support. Optional source dependencies cover spell-checking and character-encoding detection. Gaupol includes aeidon, a separately installable Python package for subtitle-file manipulation. Documentation, discussions, and an issue tracker provide support channels.