Write a thumbnail of an MP4, MOV, Matroska or WebM file: the keyframe at or before a time (or with --exact the frame at it), resized and encoded as JPEG, PNG or WebP
Usage: coreav thumbnail [OPTIONS] --output <FILE> <INPUT>
Arguments:
<INPUT> The file (or http(s) URL) to take the thumbnail of
Options:
-o, --output <FILE> Where to write the image: a new file, or `-` for standard output
--at <TIME> The time, from the file's start as for `ffmpeg -ss`: seconds (`12`, `12.5`, `12.5s`), milliseconds (`1500ms`) or `[HH:]MM:SS[.fff]` [default: 0]
--exact The first frame at or after the time (decoding from the keyframe before it) instead of the keyframe at or before it
--width <PIXELS> Image width; the height follows the display aspect ratio unless --height is given too
--height <PIXELS> Image height
--format <FORMAT> `jpeg`, `png` or `webp` (lossless); default: from the output's extension, else `jpeg` [possible values: jpeg, jpg, png, webp]
--quality <Q> JPEG quality, 1 to 100 [default: 91]
--stream <STREAM> The video stream index (default: the first video stream)
--allow <CODEC> Codecs that may be decoded, comma separated, by `ffprobe`'s names (default: h264, hevc, av1, vp9, vp8, prores)
--threads <N> Decoder threads (default: the decoder's own choice); fewer when the frames would not fit the decoder's memory budget [default: 0]
--timeout <SECONDS> Seconds decoding may take before it is stopped [default: 30]
--force Overwrite OUTPUT if it exists
-h, --help Print help
