Inspect a video or audio file: duration, resolution, codecs, fps, bitrate, file size.

Cut a clip out of a video between a start time and either an end time or a duration (seconds).

Concatenate two or more video files into one, in the given order. Clips are auto-scaled to match so different resolutions/codecs can be joined.

Convert a video/audio file to a different container/codec. The output format is inferred from the output_path extension (e.g. .mp4, .mov, .webm, .avi, .mp3).

Extract the audio track from a video file and save it as an MP3.

Resize/scale a video. Provide width, height, or both (aspect ratio is preserved if only one is given).

Crop a video to a rectangular region.

Rotate and/or flip a video.

Speed up or slow down a video (audio pitch is preserved). speed_factor > 1 speeds up, < 1 slows down (e.g. 2 = 2x faster, 0.5 = half speed).

Change the audio volume of a video, or mute it entirely.

Grab a single still frame from a video at a given timestamp and save it as an image.

Burn text (e.g. a caption or title) onto a video, optionally only during a time range.

Overlay a logo/watermark image onto a video at a chosen corner or the center.

Add a fade-in and/or fade-out to a video, audio, or both.

Reduce a video file size by re-encoding it with a given quality level (CRF). Lower CRF = higher quality/larger file; higher CRF = smaller file/lower quality. 28 is a reasonable default.

Convert a segment of a video into an animated GIF.