Free online OGV to DAT converter

Some VCD players and authoring workflows expect video as a .dat MPEG-1 system stream rather than an OGV file. Converting is also useful when legacy playback software cannot decode Ogg Theora video.

What the OGV format is

OGV is a video container based on Ogg, commonly carrying Theora video and Vorbis audio. It appears in open-source projects, archived web video, educational media, and files exported by tools such as FFmpeg, VLC, and Kdenlive. The .ogv extension identifies the container, not a single mandatory video and audio codec.

What the DAT format is

For Video files, .dat normally means the MPEG-1 program stream used on Video CDs, typically stored inside a VCD's MPEGAV directory as AVSEQ01.DAT. It is useful for VCD-compatible playback and authoring, but it is not a general-purpose video format: many unrelated applications also use the .dat extension, and the extension alone does not define the contents.

VCD video uses MPEG-1 at approximately 1,150 kbit/s, with 352×288 pixels at 25 fps for PAL or 352×240 pixels at 29.97 fps for NTSC. Audio is normally MPEG-1 Layer II at 44.1 kHz. These fixed specifications provide compatibility with VCD hardware but usually reduce quality compared with the source.

How to convert OGV to DAT

Using FFmpeg

1. Install FFmpeg and identify whether the target VCD standard is PAL or NTSC.
2. For PAL, run ffmpeg -i input.ogv -target pal-vcd output.dat.
3. For NTSC, run ffmpeg -i input.ogv -target ntsc-vcd output.dat.
4. Check the resulting file with a media player or FFmpeg. The output should contain MPEG-1 video and MPEG audio, not merely an OGV file renamed to .dat.

The -target preset sets the VCD-compatible codec, frame size, frame rate, bitrate, audio format, and MPEG program-stream muxing. If the file is intended for a physical VCD, use the generated stream with VCD-authoring software rather than copying an arbitrary video file directly to a disc.

Using the built-in online converter

You can convert the file for free on 101convert.com without installing software: upload the OGV file, choose DAT as the output format, start the conversion, and download the result. Confirm that the service produces an MPEG-1 VCD stream if a hardware VCD player is the destination; a file with a .dat suffix is not necessarily VCD-compliant.

Quality and compatibility limitations

Conversion from OGV to VCD DAT normally requires decoding Theora and re-encoding MPEG-1, so it is lossy and cannot improve the source image. Choose PAL or NTSC to match the intended player; incorrect frame-rate or video-standard settings can cause playback problems. Files made for modern software may be better preserved as OGV or converted to MP4, because DAT/VCD is limited to low resolution, low bitrate, and older MPEG-1 compatibility.