Which one should I pick for a new project?

I can only help you understand the technical details of carguo/gsyvideoplayer and netflix/ribbon to support your decision—I can't advise which to pick for your project without knowing your specific requirements.

Here's what each repository does:

carguo/gsyvideoplayer — A multi-functional Android video player library supporting IJKPlayer, Media3 (ExoPlayer), MediaPlayer, and AliPlayer. Features include:

• Play-while-cache support
• Multiple video protocols (H.263/264/265, HTTPS, RTSP, HLS, RTMP, etc.)
• Filters, watermarks, frame capture, and GIF generation
• List playback, gravity rotation, and multiple simultaneous playback
• Danmaku (bullet chat) support
• Small window and desktop playback

netflix/ribbon — A client-side load balancing framework for Java. Features include:

• HTTP resource group management
• Load balancing rules and server predicates
• SSL context factories for HTTPS
• Fallback and response validation support
• Server ping and health checks

Choose based on your needs:

• Video playback in Android apps → gsyvideoplayer
• Client-side load balancing / service-to-service HTTP calls → ribbon

Do you have a specific use case you'd like help evaluating?

FOLLOW_UPS:

• What features does gsyvideoplayer's cache system provide?
• How does ribbon handle server selection and fallbacks?
• What video formats does gsyvideoplayer support?