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Fixes the error "You have requested merging of multiple formats but ffmpeg is not installed" that occurs when yt-dlp needs to merge video and audio streams for YouTube videos. Changes: - Added ffmpeg installation to GitHub Actions pytest workflow - Added yt-dlp to test job dependencies in CI - Updated video_dl/info.json to document ffmpeg as system dependency - Added comprehensive installation instructions to README.md - Updated copilot-instructions.md with ffmpeg requirement - Added yt-dlp>=2023.1.1 to requirements-test.txt 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com> Co-authored-by: psykzz <1134201+psykzz@users.noreply.github.com>
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psykzz
April 15, 2026 19:48
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yt-dlp requires ffmpeg to merge video and audio streams when downloading YouTube videos above 720p. Without it, downloads fail with
You have requested merging of multiple formats but ffmpeg is not installed.CI/CD Changes
Documentation
system_dependencies: ["ffmpeg"]to video_dl/info.jsonUsers must install ffmpeg on their system: