bytedeco/javacv

what is the method that can make the grabImage() method return null at the expected time in the event of a sudden network outage?

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#2,032 opened on May 25, 2023

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Description

hi, I use FFmpegGrabber to pull the rtsp stream, with parameters timeout and stimeout set to 5 seconds. If the network is connected at the beginning, the program can obtain the decoded video frames And when the network suddenly disconnects while it is already running, is the timeout and stimeout above effective? Because the return value of the grabImage() method is null, but sometimes the running time of this method exceeds one minute before returning null, what is the method that can make the grabImage() method return null at the expected time in the event of a sudden network outage? thx!

Contributor guide

Research direction
Examine FFmpegGrabber's internal logic for handling network disconnections and timeouts. Check if timeouts are applied per operation or only initial connection. Consider wrapping grabImage() with a custom timeout or using Java NIO for non blocking reads.
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.
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.
Clear
Prerequisites
JavaFFmpeg
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50