Video Side by Side - Fast and Private

Video Side-by-Side

Stack two videos side-by-side or top-and-bottom into a single comparison video.

ConvertCraft VPS

Guide & Information

How to Create Side-by-Side Video

01Upload Two VideosDrop Video A (left or top) and Video B (right or bottom) into the respective dropzones. Both files are analyzed for their native resolution, frame rate, and codec — the tool reads the stream metadata to determine optimal scaling and alignment parameters.

02Choose LayoutSelect Horizontal (left/right) for side-by-side comparison using the hstack filter, or Vertical (top/bottom) using vstack. The tool automatically scales both videos to match heights for horizontal layout or widths for vertical layout, cropping or padding as needed to fit the target frame dimensions.

03Combine & DownloadFFmpeg processes both streams through the selected stacking filter — hstack for horizontal, vstack for vertical — scaling and encoding them into a single output frame. Both clips play simultaneously and are trimmed to the duration of the shorter input. The result is a single video file with both sources composited together.

Privacy & Security

Both video files are uploaded to ConvertCraft servers where they are composited in a secure FFmpeg processing pipeline. All source files and the output file are permanently deleted from the server immediately after processing — no copies, frames, or cached data are retained.

About Video Side-by-Side

Composites two video streams into a single frame using FFmpeg's hstack (horizontal) or vstack (vertical) filters. Input videos are scaled to match the target dimension — heights for horizontal, widths for vertical — using the scale filter with appropriate aspect ratio handling. The output frame combines both sources side-by-side or top-to-bottom, with both clips playing simultaneously in sync.

When to use it

Perfect for creating before/after comparison videos, reaction content where you overlay two perspectives, split-screen tutorial demonstrations showing instructor and screen, or side-by-side gameplay analysis. Also useful for comparing camera quality across two devices, showcasing A/B design iterations, or presenting dual-language translations simultaneously.

Tips & Tricks

•Both videos should have similar resolution and aspect ratio for the cleanest result — mismatched sizes will be scaled, which can cause stretching or letterboxing
•Horizontal layout works best when both source videos are 16:9 landscape format — portrait videos will appear narrow in a horizontal stack
•The output is automatically trimmed to the duration of the shorter input clip — ensure both videos are similar in length, or use Video Trim to match durations before combining
•For picture-in-picture style layouts, consider using the Video Overlay tool instead of side-by-side — this allows one video to be positioned within the other's frame
•Audio from both videos is mixed together by default — if you only want audio from one source, mute the other using Video Mute before combining

Need more help?

See the detailed comparison guide or try a related tool:

Video Merge Video Crop Video Converter Video Trim

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Video A (Left / Top)

Video B (Right / Bottom)

Output Resolution

Keep Original MetadataPro

Preserve EXIF, creation date, author, and camera info

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videoside-by-side

如何使用 Video Side by Side

打開 Video Side by Side，添加文件，然後選擇目標輸出並運行轉換。

該工具針對視頻處理進行了優化，並且在使用 mp4, mov, avi, mkv, webm 作爲輸入時效果最佳。

處理完成後，將結果下載到 mp4, mov, avi, mkv, webm 中並在共享之前驗證質量。

Video Side by Side 做什麼

Video Side by Side 是一個隱私優先的實用程序，用於快速視頻處理。它可以幫助您從 mp4, mov, avi, mkv, webm 過渡到 mp4, mov, avi, mkv, webm，並保持一致的輸出質量。

快速的工作流程

旨在減少直接上傳、快速處理和一鍵導出的摩擦。

隱私第一

文件在隔離的處理流程中進行處理，保留最少且用戶控制清晰。

實用輸出

輸出針對 mp4, mov, avi, mkv, webm 的實際用例進行了調整。

Video Side by Side處理流程

可預測的序列可確保跨設備和文件大小的轉換穩定。

工作流程

驗證源兼容性 (mp4, mov, avi, mkv, webm)。
應用轉化配置文件和質量設置。
渲染最終輸出 (mp4, mov, avi, mkv, webm)。
運行後處理檢查並返回可下載文件。

常見問題

Video Side by Side 支持哪些文件？

Video Side by Side 接受 mp4, mov, avi, mkv, webm 並導出 mp4, mov, avi, mkv, webm。

這個工具可以私人使用嗎？

該管道專爲隱私優先的處理而設計，用戶可以對輸入和輸出進行明確的控制。

我怎樣才能獲得最好的質量？

使用高質量的源文件，選擇最接近匹配的目標格式，並避免重複的重新轉換週期。

加工透明度

Video Side by Side 遵循確定性轉換流程，因此結果可重複，並且在文件行爲異常時更容易排除故障。

CONVERTCRAFT V3.0 THE NEXT GENERATION