bytedeco/javacv

Could not open input "/storage/emulated/0/video.mp4". (Has setFormat() been called?)

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#1,373 opened on Jan 22, 2020

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Description

FFmpegFrameGrabber frameGrabber = FFmpegFrameGrabber.createDefault(file); frameGrabber.setFormat("mp4");

frameGrabber.start(); gives the below exception

org.bytedeco.javacv.FrameGrabber$Exception: avformat_open_input() error -1094995529: Could not open input "/storage/emulated/0/video.mp4". (Has setFormat() been called?)

build.gradle file implementation implementation group: 'org.bytedeco', name: 'javacv', version: '1.4.3' implementation group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.3-1.4.3', classifier: 'android-arm' implementation group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.4.3-1.4.3', classifier: 'android-x86' implementation group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '4.0.2-1.4.3', classifier: 'android-arm' implementation group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '4.0.2-1.4.3', classifier: 'android-x86'

I checked and my app already has the storage permission.

Contributor guide

Research direction
Investigate the file path accessibility on Android. Ensure the file exists and is readable. Check if setFormat() is called before start() and that the FFmpeg libraries are correctly loaded. Consider using a URI or content resolver for Android 10+ scoped storage.
Tech stack
java
Domain
mobile
Issue type
Bug
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.
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.
Mostly clear
Prerequisites
JavaAndroid development
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65