previewer

Creates preview image from a video

Prerequisites

Rust build toolchain (on the build machine)
FFmpeg (mingw-w64-x86_64-ffmpeg package through MSYS2 on Windows)

How to use

  ./target/release/previewer [OPTIONS]


Optional arguments:
  -h,--help             Show this help message and exit
  -i,--input INPUT      Input video path.
  -s,--scaling SCALING  Scaling factor (default: 1, which combines all images
                        without scaling. Set it below 1 to downscale.).
  -b,--border BORDER    Border size (default: 6 px).
  -o,--output OUTPUT    Output image path (default: preview.jpg).
  -c,--count COUNT      Image count in the preview (default: 16).

How to install

Make sure your ~/.cargo/bin folder is added to your PATH.

cargo install --path . then run using

previewer [opts]

Caveats

Border size is relative to the video resolution, so it may appear differently depending on which video you generate previews for.

Example

Generating preview for this video Cyberpunk 2077: Phantom Liberty — Official Trailer with these arguments: previewer -i video.webm -s 0.1 produces this image: Note that some black frames are expected because this video has transitions. Also having this video reencoded to mp4 format can cause it to use different frames.