Open Source C# Subtitle Editors

Subtitle Edit (SE) is a free, open‑source subtitle editor for creating, editing, synchronizing, and converting subtitles. It supports a wide range of formats (over 300) and offers both graphical and text-based editing views.  Easy insertion, deletion, and shift of subtitle lines. Portable versions available (.NET 4.8, 32/64-bit), runs on Windows and via compatibility on Linux. Active development with frequent updates and issue tracking. Plugin support and rich editing tools (e.g., translation, spellcheck, sync).

FFmpeg Batch AV Converter is a free universal audio and video encoder for Windows and Linux (via Wine), that allows to use the full potential of ffmpeg command line with a few mouse clicks in a convenient GUI with drag and drop, progress information. Some fancy wizards make things easy for non-experts. Thanks to its multi-file encoding feature, it may be the fastest a/v batch encoder available, since it maximizes system resources usage by launching as many simultaneous processes up to user cpu thread count. You can change encoding priority, pause and resume, set automatic shutdown. It is good for seasoned ffmpeg users as well as beginners. It provides unlimited single or multi-file batch encoding for almost any audio/video format. You can use any set of parameters and try them before starting encoding. You can multiplex streams, subtitle videos (as track and hardcoded), trim, concatenate, record screen, multimedia info. Included youtube-dl / yt-dlp frontend GUI to download urls.

Rated Subtitles is an application that selectively displays subtitles for audio/video media based on two factors: 1. The user's self-rated proficiency in the media's language. 2. The difficulty rating of each phrase in the subtitle file. A phrase's difficulty can be determined by word frequency in the language or by how clearly it is pronounced in the media. The goal of this solution is to allow users to watch and listen to media primarily in its original language. However, if certain phrases are rated too difficult to understand or hear, the media player will automatically display subtitles for those specific lines. Another part of this solution will include extensions for various media players, both desktop and web-based.

This application is a small software that allows having an original and well synchronized subtitle, assign the times to another translation that has sync errors. The application was created after downloading many videos with original subtitles, and finding translations for other video versions, which did not match the times. It is a minimal, simple and simple application that will be extended as needed. At the moment it only has subtitle support of type SRT. - New features: * Spell check with hunspell dictionary. * Translate using google translate. * Auto check for updates.