QuoteHow do I disable automatic AVI file splitting (create AVI files larger than 4 GB)?from Avidemux wiki documentation: Frequently asked questions (http://www.avidemux.org/admWiki/doku.php?id=general:faq)
By default, Avidemux creates standard AVI files, which imposes a 4 GB file size limit. OpenDML files do not have this limitation. You can enable OpenDML output in Avidemux by checking ââ,¬Å"Create OpenDML filesââ,¬Â in preferences.