bytedeco/javacv

1.5.7 grabImage hanging 1min

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#2,037 opened on Jun 1, 2023

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Description

hi @saudet

I'm grabbing images from a live streaming, But the data tracker shows the GAP between keyframes and also happens in other frames,

Any ideas why?

CODE: while ((frame = grabber.grabImage()) != null) { if (!frame.keyFrame) { logEvent("FrameTypeCount", "NonKeyFrame"); continue; } logEvent("FrameTypeCount", "KeyFrame"); }

KeyFrame Tracker:
image

NonKeyFrame Tracker: image

early version 1.5.4 shows like this: image image

Contributor guide

Research direction
Inspect the grabImage method in FFmpegFrameGrabber to understand the frame reading logic and identify why it hangs on non keyframes.
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.
Needs investigation
Prerequisites
Java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40