🎬⏱️AGSoft Video Time Effects

🎬⏱️AGSoft Video Time Effects is the general-purpose retime node: slow-motion, timelapse, reverse, and boomerang - applied to the whole clip or just a segment of it. If you've got one video and you want to "make this bit slow, then reverse it back," this is the node.

The controls

• speed - the multiplier. Below 1 is slow-motion (0.3 = roughly 3.3x slower), above 1 is timelapse (4.0 = 4x faster), 1.0 = unchanged.
• interpolation - none or minterpolate. minterpolate generates intermediate frames for smooth slow-motion, but only applies when speed < 1, and the tooltip warns it can be slow on long videos. Real motion interpolation, so it's a genuine quality knob - but start on a short clip.
• reverse - plays the clip backwards.
• boomerang - plays forward then backward, doubling the duration, and it takes priority over reverse. This is the fun one; a 2-second loop becomes a seamless 4-second wiggle.

start_time / end_time let you target just a segment (both 0 = the whole clip). That's the difference between "speed up the whole thing" and "make just the middle bit fast."

The memory caveat

Both reverse and boomerang load the whole clip into memory to pull it off - the tooltips say so explicitly. On a long 4K video that can be a real RAM hit. Short clips, totally fine; feature-length footage, think twice.

Audio

audio_mode defaults to with_video, meaning the audio follows the speed/reverse/boomerang through an FFmpeg atempo chain. That's the right default - a reversed video with forward audio is nonsense. Note that atempo is limited in how much speed change it can do in one pass, so extreme multipliers can sound a little processed; that's an FFmpeg constraint, not a node bug.

Outputs

The standard set: video_path (STRING), duration_seconds, duration_timecode, file_size_mb, width, height, fps, frames_est. Empty output_path → ComfyUI/output. Source is the optional video input (priority) or video_path.

Install

Part of the comfyui-AGSoft pack. ComfyUI Manager → search "comfyui-AGSoft" → Install → restart, or:

cd ComfyUI/custom_nodes
git clone https://github.com/Art-xmaster/comfyui-AGSoft

Restart. No models; it drives the bundled FFmpeg (or a system ffmpeg on PATH).

How does this differ from the Speed Ramp node? Speed Ramp is for gradually changing speed across a shot. Time Effects is for a constant speed change, reverse, or boomerang - and it's the one with the segment targeting. If you want a freeze-frame hold, that's the separate Freeze Frame node. The pack splits its time effects into three on purpose, and this is the middle child that does the most.