Convert AVI to BIK

Some games and interactive applications require RAD Game Tools’ Bink format for pre-rendered cutscenes instead of a general-purpose AVI file. Converting the source locally produces a .bik file that can be tested with the target game or another application containing a compatible Bink decoder.

What the AVI format is

AVI (Audio Video Interleave) is a Microsoft RIFF multimedia container that can store video and audio encoded with different codecs. Older Windows capture programs, cameras, screen recorders, video editors, and archived game assets commonly use it.

The .avi extension does not identify the compression method. An AVI can contain uncompressed video, Motion JPEG, DV, DivX, Xvid, or another codec; the converter therefore needs a decoder for the streams in the source file.

What the BIK format is

BIK is the filename extension used for RAD Game Tools’ proprietary Bink Video format. It is intended mainly for pre-rendered game cinematics, menus, tutorials, and other packaged video rather than general web playback.

Bink can combine compressed video and optional audio in one file and offers encoder settings intended for playback inside supported games and applications. Its main practical advantage is compatibility with software that includes the required Bink runtime. A .bik file is not automatically supported by ordinary media players, and Bink 1 and Bink 2 are not interchangeable in every application.

How to convert AVI to BIK

Use RAD Video Tools from the official RAD Game Tools website on Windows. It includes the official Bink encoder; generic video converters usually do not export a valid Bink file.

1. Install and open RAD Video Tools, then browse to the folder containing the source .avi.
2. Select the AVI and choose Bink it!.
3. Enter an output name ending in .bik. If the installed release offers a Bink version choice, select the version required by the target game or engine.
4. Open the encoding settings. Set the frame size and frame rate required by the target application, preserving the source aspect ratio unless its specification requires another size.
5. Choose the quality or target data rate. Keep audio enabled only when the source contains an audio stream and the target application expects audio inside the BIK file.
6. Start the encode, then open the resulting .bik in RAD Video Tools and test it in the target application. Check audio synchronization, looping, playback speed, and any required transparency or integration behavior.

RAD Video Tools releases may include command-line utilities for batch encoding, but executable names and switches vary by release. Use the documentation installed with the specific version instead of copying commands from another release.

Quality and compatibility limits

AVI is a container, whereas BIK uses its own video codec, so conversion normally re-encodes the video and can reduce quality. Encode from the least-compressed source available and use the highest quality or bitrate allowed by the game’s storage and playback limits.

Confirm the target runtime before selecting Bink 1 or Bink 2. Compatibility can also depend on frame dimensions, frame rate, audio format, pixel format, maximum bitrate, and whether the game expects a particular filename or looping behavior. Renaming .avi to .bik does not perform a conversion.

Online services such as CloudConvert and Zamzar may accept AVI but generally do not provide dependable BIK output. No mainstream online service is a suitable substitute for the official Bink encoder when the file must work in a specific game, and uploading proprietary or unreleased game assets can create a security and confidentiality risk. Use RAD Video Tools locally and retain the original AVI until deployment testing is complete.