⭐ Star Video Compressor

You generated a great video, exported it, and Discord told you the file is too big. It's the most common way a happy AI-video session ends, and the standard advice - "just re-encode it in handbrake" - means leaving ComfyUI. Star Video Compressor keeps it all in the graph: it re-encodes your video to a chosen quality or a target file size, with H.264, H.265, VP9, AV1, GIF, WebP and more, entirely standalone. No Video Helper Suite required.

How it works

It accepts video three ways: the video socket from the pack's Star Video Loader (a STAR_FILENAMES reference), a direct file path in video_path, or an images IMAGE batch that it encodes and compresses in one step (using frame_rate - and the docs suggest right-clicking the frame_rate widget to convert it to an input and wiring the loader's fps output). Everything routes through FFmpeg under the hood, which the pack pulls in via imageio-ffmpeg.

Two compression modes, and the priority is explicit:

• target_size_mb - set this above 0 and it wins: the node calculates the bitrate from the duration and does two-pass encoding where supported to land the file at your target. This is the Discord mode: set it to 9.5 and forget about quality sliders.
• quality (0–100, default 60) - a plain CRF-style quality control, used only when target_size_mb is 0.

Extra controls worth knowing: preset trades encode time against file size at the same quality; drop_first_frames / drop_last_frames trim frames off either end (and shift/trim any audio to stay in sync - nice for shaving the silent lead-in off a clip); save_audio muxes the audio in; save_output picks output vs temp folder. filename_prefix may include subfolders like discord/my_clip.

Outputs

Filenames (STAR_FILENAMES) - the resulting file reference you can pass to other Star video nodes or the joiner - plus info (STRING) with a summary. There's also an inline preview so you can watch the result without leaving the canvas.

Installing

Part of StarNodes:

cd ComfyUI/custom_nodes
git clone https://github.com/Starnodes2024/ComfyUI_StarNodes
cd ComfyUI_StarNodes
pip install -r requirements.txt

Restart, search star under ⭐StarNodes/Video. ComfyUI Manager users: search "Starnodes".

Gotchas

If a format shows up but fails at runtime, it's almost always a missing FFmpeg encoder in your build - AV1 (video/av1-mp4) is the one most likely to be absent on a stock imageio-ffmpeg build, so H.264 (video/h264-mp4) is the safest default. And the two-pass size mode is slower than a quality-mode encode - worth it when you absolutely need to fit a limit, pointless when you don't. save_audio is on by default, so a silent-gen video gains a silent track; if that bothers downstream players, flip it off.