ossia/score

AVFormatContext interrupt_callback support

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#1,792 opened on May 27, 2025

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ODHack14easygood first issue

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Description

needed to handle proper camera unplugging:

+++ b/src/plugins/score-plugin-media/Video/CameraInput.cpp
@@ -71,6 +71,9 @@ bool CameraInput::start() noexcept
   m_formatContext->flags |= AVFMT_FLAG_NOBUFFER;
   m_formatContext->flags |= AVFMT_FLAG_FLUSH_PACKETS;
 
+  m_formatContext->interrupt_callback.callback = +[](void*) -> int { return 1; };
+  m_formatContext->interrupt_callback.opaque = 0;
+
   AVDictionary* options = nullptr;

Contributor guide

Research direction
Examine the CameraInput.cpp file and integrate the interrupt callback into the AVFormatContext initialization to handle camera disconnection gracefully.
Tech stack
cpp
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
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
cppffmpeg
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75