快速的工作流程
旨在减少直接上传、快速处理和一键导出的摩擦。
打开 Video Aspect Ratio,添加文件,然后选择目标输出并运行转换。
该工具针对 视频处理 进行了优化,并且在使用 mp4, avi, mov, mkv, webm 作为输入时效果最佳。
处理完成后,将结果下载到 mp4, webm, avi 中并在共享之前验证质量。
Video Aspect Ratio 是一个隐私优先的实用程序,用于快速 视频处理。它可以帮助您从 mp4, avi, mov, mkv, webm 过渡到 mp4, webm, avi,并保持一致的输出质量。
旨在减少直接上传、快速处理和一键导出的摩擦。
文件在隔离的处理流程中进行处理,保留最少且用户控制清晰。
输出针对 mp4, webm, avi 的实际用例进行了调整。
可预测的序列可确保跨设备和文件大小的转换稳定。
Video Aspect Ratio 接受 mp4, avi, mov, mkv, webm 并导出 mp4, webm, avi。
该管道专为隐私优先的处理而设计,用户可以对输入和输出进行明确的控制。
使用高质量的源文件,选择最接近匹配的目标格式,并避免重复的重新转换周期。
Video Aspect Ratio 遵循确定性转换流程,因此结果可重复,并且在文件行为异常时更容易排除故障。
Change a video's aspect ratio by padding with black bars or cropping.
All uploads are processed on secure ConvertCraft servers with encrypted transfer. Original files are permanently deleted from our servers immediately after processing — no copies are retained. Processing happens in isolated containers that are destroyed after your session.
This tool uses FFmpeg's scale, pad, and crop filters to reframe video content. The Pad method applies the scale filter followed by pad with configurable colour (default black) to add horizontal letterbox or vertical pillarbox bars. The Crop method calculates the largest rectangle matching the target ratio within the source dimensions, using centre-gravity positioning by default. Supported ratios include 16:9 (widescreen), 9:16 (mobile portrait), 1:1 (square), 4:3 (classic TV), and 21:9 (ultrawide cinematic).
Essential for repurposing content across platforms — a 16:9 YouTube video needs 9:16 padding or cropping for TikTok Reels and Instagram Stories. Also useful for adding cinematic 21:9 letterbox bars to standard footage, or converting 4:3 legacy content to modern 16:9 without distorting the image. Perfect for matching broadcast specifications or social media upload requirements.
See the detailed comparison guide or try a related tool:
MP4, MOV, AVI, MKV, WebM and more