Comfyui-PainterAudioCut
High-precision audio trimming custom node based on frame rates for ComfyUI - trim audio precisely by frame numbers instead of timestamps, perfectly matching video frame…
Nodes (1)
ComfyUI Audio Cut Node / ComfyUI 音频剪切节点
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PainterAudioCut
专为视频生成设计的精准音频裁剪节点。按帧率定位裁剪点，自动对齐 4N+1 帧格式，支持头尾静音插入，完美匹配 Wan2.1 等模型的音频长度要求。
参数说明
- frame_rate: 视频帧率（如 30fps 视频填 30）
- head_silence_frames: 开头插入静音帧数（0-1000），用于对齐音频起始
- start_frame: 原音频裁剪起始帧（从 0 开始）
- end_frame: 原音频裁剪结束帧
- tail_silence_frames: 结尾追加静音帧数（0-1000）
输出
- trimmed_audio: 处理后的音频数据
- total_frame: 对齐后的总帧数（4N+1 格式）
典型用法 连接 Wan2.1 视频工作流，帧率与视频一致，通过头尾静音调节音频起始时间，节点自动确保输出长度符合模型要求（如 121、125 帧等）。
PainterAudioCut
A precision audio trimming node designed for video generation workflows. Cuts audio segments by frame-based timing and automatically aligns output to 4N+1 frame format (required by Wan2.1 and similar video models).
Parameters
- frame_rate: Target video frame rate (e.g., 30 for 30fps video)
- head_silence_frames: Silent frames to insert at the beginning (0-1000)
- start_frame: Cut start position in original audio (0-based)
- end_frame: Cut end position in original audio
- tail_silence_frames: Silent frames to append at the end (0-1000)
Outputs
- trimmed_audio: Processed audio tensor
- total_frame: Total aligned frame count (4N+1 format)
Typical Usage
Connect to Wan2.1 video generation workflows. Set frame_rate matching your video, define audio segment with start_frame/end_frame, and use head_silence_frames to sync audio start with video timing. The node ensures audio length automatically aligns to model requirements (e.g., 121, 125, 129 frames).