Learning Notes
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  • Guide
    • Shortkeys
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  • Cpp
    • Basic
    • Scope, Duration, and Linkage
    • Pointers(1)
    • Pointers(2)
  • Rust Learning
    • 1.Number Types
    • 2.Ownership
    • 3.Struct
    • 4.Enum
    • 5.Package-management
    • 6.Vector
    • 7.Error handle
    • 8.Trait 泛型
    • 9.Life time
    • 10.Test
    • 11.Minigrep
    • 12.Closure 闭包
    • 13.Smart pointer 智能指针
    • 14.Fearless concurrency 无畏并发
  • Quantum Computing
    • Basic computing and quantum computing Theory
    • Teleportation
    • QKD and QFT
    • QFE and Shor's algorithm
    • QAOA
    • Quantum algorithms
    • Week 11
  • Statical Machine Learning
    • Bayesian Linear Regression
    • Linear regression and logistic regresion
    • Bais
    • SVM, Kernel Methods
    • Precepction and Artificial Neural Network
    • Cross validation, experts learning, MAB
    • Bayesian inference
    • GMM-EM
    • final
  • Software Project Management
    • Lecture
    • Revision
  • AI-planning
    • Classical planning
    • MDP and reinforcement learning
    • Game theory and final recap

ffmpeg 命令

截取视频

 ffmpeg -i input.mp4 -t 1800 -c copy output.mp4
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Contributors: pingzhihe
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