bytedeco/javacv

Why do I get different frame contents after extracting frames from audio using JavaCV version 1.5.9 and version 1.5.11?

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#2347 opened on Aug 11, 2025

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Description

Why do I get different frame contents after extracting frames from audio using JavaCV version 1.5.9 and version 1.5.11? The settings for FFmpegFrameRecorder are as follows:

FFmpegFrameRecorder recorder = new FFmpegFrameRecorder();
recorder.setAudioCodec(avcodec.AV_CODEC_ID_PCM_S16LE);
recorder.setAudioChannels(1);
recorder.setAudioQuality(0);
recorder.setSampleRate(11025);
recorder.setFormat("wav");

Contributor guide

Tech stack
javacpp
Domain
api
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Java programmingAudio codec basicsFFmpeg concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
Investigate the commit history between JavaCV 1.5.9 and 1.5.11 for changes in FFmpegFrameRecorder and audio processing. Create a minimal reproducible example to compare frame contents. Check if any default settings or codec parameters were changed.