Free online DAT to WAV converter

A video editor or audio workstation may require the soundtrack from a Video CD in editable .wav format. Converting the VCD file decodes its MPEG audio into uncompressed PCM for editing, sharing, or archival use.

What the DAT format is

For the Video category, .dat usually identifies an MPEG-1 program stream from a Video CD. These files are normally stored in the disc's MPEGAV folder with names such as AVSEQ01.DAT. A VCD DAT file contains multiplexed MPEG-1 video and audio; it is not an audio file that can be converted by simply changing its extension.

VCD audio is commonly MPEG-1 Layer II at 44.1 kHz, often stereo, although the exact stream should be checked. VLC and FFmpeg can usually read a valid VCD DAT file. A file with the same extension from another application may contain unrelated data and cannot necessarily be processed as video.

What the WAV format is

WAV is a container commonly used for uncompressed PCM audio. Video editors, digital audio workstations, media players, and operating-system audio tools support it widely, so the decoded soundtrack can be edited without requiring an MPEG decoder.

WAV does not preserve more detail than the source: it stores the audio after MPEG decoding and does not add another lossy compression stage. It is much larger than the original VCD audio; 44.1 kHz, 16-bit stereo PCM requires about 10.1 MB per minute.

How to convert a VCD DAT file to WAV

Using FFmpeg

1. Install FFmpeg from a trusted desktop distribution and copy the DAT file to an accessible folder.
2. Inspect the streams with ffprobe -i AVSEQ01.DAT. Confirm that the output lists an audio stream.
3. Extract the first audio stream as 16-bit PCM WAV:

ffmpeg -i AVSEQ01.DAT -vn -map 0:a:0 -c:a pcm_s16le output.wav

-vn omits video, -map 0:a:0 selects the first audio stream, and pcm_s16le writes standard 16-bit little-endian PCM. To set the usual VCD sample rate explicitly, use ffmpeg -i AVSEQ01.DAT -vn -map 0:a:0 -ar 44100 -c:a pcm_s16le output.wav. Do not add -ac 2 unless the source is actually stereo or stereo output is required; forcing channels can alter a mono source.

If ffprobe shows multiple audio streams, replace -map 0:a:0 with the required stream index, such as -map 0:a:1. Quote filenames containing spaces, for example "My VCD file.DAT".

Using VLC

1. Open VLC and select Media → Convert/Save.
2. Add the DAT file, select Convert/Save, and choose or create an audio profile whose container is WAV and whose codec is PCM.
3. Specify a destination ending in .wav, then start the conversion.

VLC's available profiles vary by version. If no suitable WAV profile appears, FFmpeg provides more reliable control over the stream, sample rate, and channel layout.

You can also use the converter on 101convert.com for free without installing software, provided the service accepts the particular VCD DAT file.

Quality and compatibility limits

Conversion cannot restore detail removed by the source MPEG audio compression. Increasing the WAV sample rate or bit depth only enlarges the output; it does not improve the source quality.

A damaged disc file, an incomplete copy, or a DAT file that is not a VCD MPEG stream may fail to open. If FFmpeg reports no audio stream, verify that the file came from MPEGAV, check the file with VLC, and recopy it from the disc if necessary. Keep the original DAT file because converting to WAV does not preserve the video stream.