bytedeco/javacv

how to add new audio channels to mp4 which already have audio channels

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#1,940 opened on Nov 19, 2022

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Description

Hi, I want to mix a new audio channels(backgound music) to mp4 file which already have two audio channels, I think this refer to how to mix the existing and new audio channels, I have no idea how to accomplish this purpose, can you give me some advise? thank you! If there is some example code, that's perfect! thank you ~~

Contributor guide

Research direction
Look up FFmpeg's amix or amerge filter to combine audio streams. In Javacv, use FFmpegFrameRecorder to record output with multiple audio streams. Check the Javacv examples for audio mixing.
Tech stack
java
Domain
None
Issue type
Documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaFFmpeg
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60