AVMergePro Options Explained

This guide explains every option in AVMergePro and when to use each setting.

Output format

MP4

• Best compatibility across devices and platforms
• Recommended default

MKV

• Best for multiple audio tracks or subtitles
• Less compatible with some devices

WebM

• Best for modern browsers and web playback
• Not ideal for older devices

Video codec

Copy

• Fastest option, no quality loss
• Keeps original video codec

H.264

• Most compatible video codec
• Good balance of quality and size

H.265/HEVC

• Smaller files than H.264
• Slower encoding and limited device support

Audio codec

Copy

• Fastest, no quality loss
• Keeps original audio codec

AAC

• Best for MP4
• Widest support

MP3

• Legacy compatibility
• Larger files for the same quality

Opus

• Best quality per size
• Best in WebM

Video quality (CRF)

Lower CRF means higher quality and larger files.

• 18–20: Near‑lossless
• 21–23: Good balance
• 24–28: Smaller files, more compression

CRF applies only when re‑encoding video.

Audio offset

• Positive values delay audio
• Negative values start audio earlier
• Useful when voiceover or music is slightly out of sync

-shortest

• Stops output when the shortest stream ends
• Useful when audio or subtitles are shorter
• Disable if you need the full video length

Notifications

• Desktop notifications when processing completes
• Helpful for long merges

Recommended defaults

• Output: MP4
• Video: Copy
• Audio: Copy (or AAC if needed)
• CRF: 23 if you must re‑encode