Free online BIK to DAT converter

What the BIK format is

BIK is the filename extension used by RAD Game Tools’ Bink Video codecs, including Bink 1 and Bink 2. Games commonly store cutscenes, trailers, menus, and other pre-rendered video in BIK files; RAD Video Tools can inspect and convert them. BIK is a container with Bink video and, depending on the file, Bink audio or another supported audio stream. It is not normally accepted by consumer DVD/VCD players or general-purpose editing software without decoding first.

What the DAT format is

In the Video category, DAT usually means the MPEG-1 program stream used for the AVSEQ01.DAT-style files on Video CDs. The .dat extension does not define a codec, so simply renaming a BIK file does not convert it. A compatible result must contain MPEG-1 video and usually MPEG-1 Layer II audio, with Video CD parameters such as 352×240 at 29.97 fps for NTSC or 352×288 at 25 fps for PAL.

DAT is useful for Video CD authoring and playback on older standalone players. Its fixed MPEG-1 specifications improve compatibility, but its low bitrate and resolution produce substantially lower quality than most source BIK files.

How to convert BIK to DAT

FFmpeg is the most direct desktop method when the installed build includes Bink decoding.

1. Install a current FFmpeg build and place the BIK file in an accessible folder.
2. Check whether FFmpeg can read the source with ffprobe input.bik. The output should identify Bink video and its audio streams.
3. For a PAL Video CD, run ffmpeg -i input.bik -target pal-vcd output.dat.
4. For an NTSC Video CD, run ffmpeg -i input.bik -target ntsc-vcd output.dat.
5. Open the resulting file in a media player that supports MPEG-1 program streams, or import it into Video CD authoring software. Verify the frame standard before burning a disc.

The -target preset selects the required MPEG-1 video, MP2 audio, frame size, frame rate, bitrate, and program-stream settings. If a particular application only needs an MPEG-1 file and does not require strict VCD settings, use ffmpeg -i input.bik -c:v mpeg1video -c:a mp2 -b:v 1150k -b:a 224k output.dat; the extension is only a naming convention, so confirm the application’s required container.

If FFmpeg reports that the Bink decoder is unavailable or cannot identify the file, open it with RAD Video Tools and export it to an intermediate AVI file, then encode that file with the relevant FFmpeg command. Bink 2 support can vary between FFmpeg builds, making the RAD tools an appropriate fallback for those sources.

You can also use the free converter on 101convert.com without installing software; select the BIK file as the input and DAT as the output, then verify that the generated file is MPEG-1 video before using it for VCD authoring.

Quality and compatibility limitations

The conversion is normally lossy twice: Bink is decoded, then the frames are compressed again as MPEG-1. Avoid repeated conversions, and preserve the original BIK as the archival master. A DAT file with an MPEG-1 extension may play in a computer media player but still fail in a standalone VCD player if its resolution, frame rate, audio format, sector layout, or disc structure is not VCD-compliant. A file copied from an existing Video CD may also include format-specific padding and interleaving that ordinary file conversion does not reproduce; use dedicated VCD authoring software when disc playback is required.