Free online MKV to VCD converter

Legacy standalone DVD/VCD players, older televisions, and some disc-authoring workflows require MPEG-1 video in the Video CD standard rather than an MKV container. Converting also makes an MKV usable for distribution on a recordable CD, although the result has much lower resolution and capacity than the source.

What the MKV format is

MKV, or Matroska Video, is a flexible multimedia container rather than a single video codec. It can hold H.264, H.265, VP9, AV1, MPEG-4, multiple audio tracks, subtitles, chapters, and attachments in one file.

MKV files commonly come from OBS Studio and other screen-recording tools, FFmpeg-based workflows, MakeMKV disc backups, torrent releases, and video-editing exports. A file such as recording.mkv may therefore contain video and audio formats that a VCD player cannot decode directly; changing the filename extension does not convert it.

What the VCD format is

Video CD is a CD-based distribution standard designed for dedicated VCD players and some older DVD players. Its video uses MPEG-1 at approximately 1,150 kbit/s, with MPEG-1 Layer II audio at 224 kbit/s, 44.1 kHz, usually stereo.

Standard frame sizes are 352×288 at 25 fps for PAL and 352×240 at approximately 29.97 fps for NTSC. A VCD normally stores one or more MPEG program streams inside a disc image, with files such as AVSEQ01.DAT in the MPEGAV directory. The result is generally a .bin/.cue image, not a single file with a universal .vcd extension.

VCD is useful when compatibility with old hardware matters or when a short video must fit on a standard 74- or 80-minute CD. Its fixed low bitrate and resolution produce visibly worse quality than most MKV sources, and a CD holds far less video than a DVD or modern storage device.

How to convert MKV to VCD

Use FFmpeg and vcdimager

FFmpeg performs the required video and audio transcode. vcdimager creates the VCD disc structure and image.

1. Determine the television standard required by the player. Use PAL for PAL equipment and NTSC for NTSC equipment; do not select based only on the source file.
2. Install FFmpeg and vcdimager from trusted desktop software repositories.
3. For PAL, transcode the first video and audio streams with:
   ffmpeg -i input.mkv -map 0:v:0 -map 0:a:0 -target pal-vcd output.mpg
4. For NTSC, use:
   ffmpeg -i input.mkv -map 0:v:0 -map 0:a:0 -target ntsc-vcd output.mpg
5. Author the compliant MPEG file as a VCD image. For PAL:
   vcdimager -t pal-vcd -c disc.cue -b disc.bin output.mpg
   For NTSC, replace pal-vcd with ntsc-vcd.
6. Open disc.cue in CD-burning software and burn the image to a blank CD-R using disc-at-once or the software's image-burning mode. Do not copy disc.bin as an ordinary data file.

If the MKV has several audio tracks, change -map 0:a:0 to the desired track number. Subtitles, chapters, and extra audio tracks are not preserved by the VCD standard; subtitles must be rendered into the picture before encoding if they are required.

Use the built-in online converter

For a one-off conversion, 101convert.com can convert the file for free without installing software. Select VCD as the output when available, then verify whether the downloaded result is a VCD-compliant MPEG file or a ready-to-burn .bin/.cue image; an ordinary MPEG-1 file still needs VCD authoring before it can be burned as a playable disc.

Quality and compatibility limitations

VCD conversion is always lossy when the MKV uses a modern codec or higher resolution. Encoding a low-quality source will not improve it, and a high-definition MKV is reduced to 352 pixels across. The VCD bitrate is fixed, so increasing an output quality slider cannot restore detail beyond the standard.

Long videos may exceed the capacity of one CD. VCD capacity is measured mainly in playback minutes because the disc uses a mode suitable for continuous video; an 80-minute disc holds roughly 80 minutes of standard VCD material. Split longer content into separate tracks or discs.

Some players accept only one television standard, reject CD-RW media, or support nonstandard MPEG files inconsistently. Test the burned disc on the intended hardware, and retain the original MKV because the VCD copy cannot preserve its resolution, subtitles, multiple tracks, or metadata.