VOB is short of DVD Video Object developed to save all audio and video data of MPEG2. It includes many data streams of video, audio and subtitles. Vob mainly contains 2 types of data: simple data including files, catalogues and its each version and complicated data like branch, labeling and record of incidents, etc., whose structures and formats are determined by vob Schema.

ASF is Advanced Streaming Format. It is an extensible file format developed primarily for storing synchronized digital video, audio, subtitle streams, or transmitting data on the internet. ASF is also a multimedia container of Windows Media Video or Windows Media Audio.

To convert vob to asf file, you may first install a DVD player based on Microsoft DirectShow technology on your Windows. VISTA has bundled vob decoder.


Download ASF Converter which can convert vob to asf file. Select a vob file, Change the output format to ASF in the Options dialog box, configure some parameters such as the video encoding bitrate, audio encoding bitrate, resolution, frame rate etc if necessary. If the vob files are protected or encrypted, the conversion will fail.


PSP means PlayStation Portable, which is firstly developed by Sony Corporation. Its control design is still based on games but adds new film and playing function which differs from the former Play Station. PSP supports jpg, gif, bmp, png, tif, MP3, MP4, AAC, ATRAC, WAV, MPEG4.

To convert psp to asf means to convert mpeg4 format video files to asf file  normally. Please try to install codec pack for PSP.

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