Vts_01_1.vob -

Indicates this is the first segment of the video content for that title. On a physical DVD, VOB files are restricted to a maximum size of 1 GB due to legacy file system limitations (FAT32/ISO 9660). If a movie is larger than 1 GB, it is split into subsequent files like VTS_01_2.VOB and VTS_01_3.VOB .

The file is a critical component of the DVD-Video standard, representing the first "Video Object" (VOB) file of the first "Video Title Set" (VTS) on a disc. This file serves as the primary container for the digital multimedia data—including video, audio, and subtitles—that makes up the beginning of a movie or feature. 1. The Anatomy of a VOB File VTS_01_1.VOB

Stored as "subpictures" that are overlaid on the video stream. Indicates this is the first segment of the

Identifies this as the first title set on the disc (usually the main movie). The file is a critical component of the