bytedeco/javacv

Error on InputStream.read(): java.io.IOException: closed

Open

#2,049 opened on Jun 29, 2023

View on GitHub
 (3 comments) (0 reactions) (0 assignees)Java (1,583 forks)batch import
bughelp wanted

Repository metrics

Stars
 (6,985 stars)
PR merge metrics
 (No merged PRs in 30d)

Description

When I use FFmpegFrameGrabber(InputStream) and the InputStream is closed, I only get the message on stderr: Error on InputStream.read(): java.io.IOException: closed FFmpegFrameGrabber#grab then still waits in line 1454 pkt.stream_index(-1); infinitly.

I would appreciate, if FFmpegFrameGrabber#grab would return a null Frame, so I can take appropriate action. Even better would be, if FFmpegFrameGrabber#grab throws that java.io.IOException.

Contributor guide

Research direction
Investigate the FFmpegFrameGrabber.grab() method to handle closed InputStream properly, either by returning null or throwing IOException, and examine the underlying native FFmpeg call to understand blocking behavior.
Tech stack
java
Domain
backend
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.
Clear
Prerequisites
JavaFFmpeg concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75