avel is a library of functions for video editing and generation. It supports trimming, combining video clips with different dimensions, adding text overlays, merging audio, and more.

You must have Python 3 and ffmpeg installed on your machine. Ensure that both ffmpeg and ffprobe are available from the command line. To install avel run:

pip install git+https://github.com/evliang/avel.git

Create clips of a video (original video is preserved)

trim_video(f'input.mp4', 'output0.mp4', 4, 8.2)
trim_video(f'input.mp4', 'output1.mp4', '00:00:42.000', '00:01:33.700')

Combine multiple clips into one file

combine_videos(["file1.mp4", "file2.mkv", "file3.avi"], "combined.mkv")

Create a video with 16:9 ratio, adding a blur effect to the sides (if applicable)

blur_video("combined.mkv", "blurred.mkv")

Add text on top of video (e.g. subtitles, watermark) using a dictionary of options

overlays = [
    create_drawtext_dict("avel", "right", "bottom", 40),
    create_drawtext_dict("Hello World!", "mid_x", "bottom", 50, enable="between(t,0,8)") ]

drawtext("input.mkv", "output.mkv", overlays)

Extract audio from a video

extract_audio("video.mp4", "audio1.m4a", 15, 30)

Combine list of audio files into one longer audio file, with an 8-second transition

combine_audio(["audio1.m4a", "audio2.mp3"], "output.mp3", transition_time=8)

Merge two audio files into one (e.g. foreground and background)

merge_audio("main.mp3", "background.mp3", "output.mp3", vol1=1.0, vol2=0.4)

Combine audio and video file into one video file

combine_audio_video(audioPath, videoPath, output_filename)

See example folder for some scripts that I created for my own use case