bytedeco/javacv

Caused by: java.lang.NoClassDefFoundError: java.lang.ClassNotFoundException: org.bytedeco.javacpp.presets.javacpp

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#1,831 opened on Jun 20, 2022

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enhancementhelp wanted

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Description

I encountered a problem when using javacv ffmpeg. Classnotfoundexception will be thrown when running. image I checkedapp-debug.apkpackageclasse.dexCode in the file，It is found that the javacpp dependency has changed into this, so the org bytedeco. javacpp. presets. Javacpp class. image can you tell me why this happens. Gradle dependencies -

implementation (group: 'org.bytedeco', name: 'javacv', version: '1.5.7'){
    transitive=false
}
implementation group: 'org.bytedeco', name: 'ffmpeg', version: '5.0-1.5.7'
implementation group: 'org.bytedeco', name: 'ffmpeg', version: '5.0-1.5.7', classifier: 'android-arm'

Contributor guide

Research direction
Investigate why the class org.bytedeco.javacpp.presets.javacpp is missing from the APK, possibly due to the transitive=false setting or missing proper classifier for Android. Check the javacpp presets dependency inclusion.
Tech stack
javaandroid
Domain
mobile
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
JavaGradleAndroid
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60