Pemotong & Pemangkas Video

Video files (MP4, WebM, MOV) are containers that hold encoded video and audio streams. Video compression uses inter-frame compression: most frames (P-frames and B-frames) store only the differences from previous frames, while keyframes (I-frames) store a complete image. This makes video editing complex -- cutting at a non-keyframe requires decoding all frames from the previous keyframe to the cut point, then re-encoding from that point. Browser-based video editors work around this limitation using the MediaSource API for playback control and the WebCodecs API for frame-level access.

Elemen HTML5

Our tool uses the fast-cut method for initial preview and offers re-encoding for final export. The WebCodecs API (available in Chrome 94+) provides access to the video decoder and encoder, allowing frame-accurate cuts without server processing. For browsers that don't support WebCodecs, the tool falls back to the MediaRecorder API, which captures the video element's output in real time -- slower but universally supported. The output format is WebM (VP8/VP9 codec) which is supported by all modern browsers.

MP4 (H.264/AAC) is the most widely supported video format -- every browser, mobile device, and video editing tool can play it. WebM (VP8/VP9/Vorbis/Opus) is Google's open format, supported by Chrome, Firefox, and Edge but not Safari (for VP8/VP9). For maximum compatibility, MP4 is the best choice. For web optimization, WebM produces smaller files at equivalent quality. Our tool can output both formats when the WebCodecs API is available.

When clipping videos, be aware that the output quality depends on the re-encoding settings. For web sharing, 1080p at 5-8 Mbps (H.264) or 3-5 Mbps (VP9) provides good quality. For professional use, preserve the original bitrate and codec settings. Audio is typically AAC at 128-192 kbps for MP4, or Opus at 96-128 kbps for WebM. Our tool preserves the original audio track during fast cuts and re-encodes audio during precise cuts.