A: Hi hello849,
Thanks for your question. That is a good question!

These are the handbrake can't do:
Conversion functions:
1. Aicoosoft Video Converter supports fast all video/audo formats, but Handbrake supports only MP4, MKV, and WebM.
2. Aicoosoft Video Converter supports converting 4K & HD videos like H264(AVC) and H265(HEVC), 1080P etc. It is better than using Handbrake.
3. With advanced GPU acceleration and Multi-core Processor Optimization technology has Aicoosoft video converter has a better balance between the conversion speed and output video quality. It converts videos 30x faster. Handbrake can’t do it.
4. Aicoosoft Video Converter can convert DVD to digital video formats you want. Handbrake can’t do it.

Editing functions:
Aicoosoft Video Converter has an all-in-one video editor, it can trim and merge videos easily and efficiently, add and adjust subtitles to videos, add image or text as watermark, apply filters and basic effects to videos, manage the volume levels or reduce background noise according to your requirements, adjust video brightness, contrast, hue, and saturation, and so on. These are the handbrake can’t do.

Downloading functions:
With built-in video downloader can Aicoosoft Video Converter download online videos you want from streaming video websites, it supports also download video to MP3 directly and supports download video playlists. These are the handbrake can’t do.

Others the handbrake can’t do:
1. Video compression is simpler and more flexible.
2. Record videos and audio.
3. User-friendly product experience.

Different people, different needs. Anyway, we respect users' own choices.