FFmpeg Batch AV Converter vs Lacuna

FFmpeg Batch AV Converter is a graphical interface for using FFmpeg's command-line capabilities in audio and video workflows. It supports unlimited single-file or multi-file batch encoding for formats handled by FFmpeg, including MP3, AAC, AC3, FLAC, WAV, Opus, and Vorbis. Encoding options include simultaneous jobs, two-pass processing, fixed output target size, and custom parameters that can be created with an encoding wizard. Users can drag and drop files, track progress, change priority, pause or resume, and set automatic shutdown or folder monitoring. The application also supports stream mapping, multiplexing, demuxing, subtitle processing, trimming, concatenation, thumbnail extraction, image-to-video creation, silence detection, splitting, and chapter creation. It can batch-download YouTube videos, live events, and m3u8 links through a youtube-dl/yt-dlp interface for supported URLs. The free, open-source project has been developed since 2017 under LGPL-2.1. Windows and Linux are supported; Linux use requires Wine 9.0 or higher and wine-mono.

Lacuna turns a short idea into song lyrics and can send them to its music generator to create a track with AI vocals. The editor supports line-by-line rewrites, syllable counts, automatic rhyme highlighting, and rhyme suggestions ranked by meaning. It supports nine languages, with phonetic rhyme support for English, Spanish, Chinese, Japanese, and Korean. Automatic snapshots let users restore an earlier take after AI edits. Lacuna describes the workspace for songwriters, rappers, topliners, producers, and first-time writers, and says generated or edited lyrics may be recorded, released, and used commercially. The free plan provides 120 credits per month without requiring a credit card; each lyrics AI use costs five credits, and unused credits do not roll over. Pricing lists paid service from $9.50/mo (annual), while Basic is $19 a month. Audio downloads require a subscription, and credit packs alone do not include them. The developer API requires Pro or Ultra and uses credit-based billing. Lacuna lists web, iOS, extension, and API platforms.