bytedeco/javacv

The value of video_c.framerate().num() is different from that of video_st.r_frame_rate().num()

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#1,581 opened on Jan 29, 2021

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enhancementhelp wanted

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Description

When using grabber, we find that sometimes the value of video_c.framerate().num() is different from that of video_st.r_frame_rate().num().video_c.framerate().num() is 0 at the beginning, and it doesn't have a value until decoding the frame. Which one should I use to get the frame rate?

Contributor guide

Research direction
Investigate the difference between video c.framerate() and video st.r frame rate() in the FFmpeg grabber, and document which one should be used and when.
Tech stack
java
Domain
backend
Issue type
Documentation
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
Java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70