Free online JPEG to MKV converter

A JPEG is a still image, but some video players, editing workflows, or upload systems accept only video files such as MKV. Converting it creates a video that displays the picture for a chosen duration; it does not add motion.

What the JPEG format is

JPEG is a lossy image format commonly used for photographs and web images. Cameras, phones, scanners, and image editors such as Photoshop create or export JPEG files, usually with the .jpg or .jpeg extension.

What the MKV format is

MKV, or Matroska, is a media container for video, audio, subtitles, and related tracks. It can hold video encoded with different codecs; the container itself does not determine compression. Choose MKV when a playback or editing workflow requires Matroska, and check that the target device supports the video codec inside it.

How to convert JPEG to MKV

Online on 101convert.com

1. Open the JPEG-to-MKV converter page and upload the image. You can add several files for batch conversion; the page shows the per-file size limit.
2. Set the video length before converting.
3. Start the conversion and download the resulting MKV file.

Offline with desktop software

FFmpeg is free, open-source software for Windows, macOS, and Linux. Run this command in a terminal, replacing photo.jpg with your file and 10 with the desired duration in seconds:

ffmpeg -loop 1 -i photo.jpg -t 10 -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" -c:v libx264 -pix_fmt yuv420p output.mkv

The command repeats the image for 10 seconds and encodes it as H.264 video in an MKV container. The scale filter makes the dimensions even, as required by the selected pixel format; it may trim at most one pixel from an odd image dimension.

Quality and compatibility

The result is a still-image video, not an animated image. H.264 encoding recompresses the JPEG and can change its image quality; the command uses FFmpeg's default quality setting. The file's duration and dimensions affect its size, while the chosen video codec affects playback compatibility.