bytedeco/javacv

How to record .m4a file from pcm

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#1,917 opened on Nov 2, 2022

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Description

I try to record pcm stream to m4a file, but it run failed.

try (FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(out, 1)) {
    recorder.setFormat("m4a");
    recorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);
    recorder.setAudioBitrate(128000);
    recorder.setSampleRate(16000);
    recorder.start();

exeption: error=avformat_write_header error() error -22: Could not write header to "XXXXXX"

Contributor guide

Research direction
Check the audio parameters (sample rate, codec) and ensure they are compatible with the M4A format. Verify that the output file path is valid and has write permissions. Look at FFmpeg documentation for correct header writing.
Tech stack
java
Domain
audio video rtc
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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.
Needs investigation
Prerequisites
Java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50