臺灣博碩士論文加值系統

摘 要 i
ABSTRACT ii
誌　謝 iv
圖目錄 vii
表目錄 viii
第壹章、緒論 1
1.1 研究背景 1
1.2 研究動機 2
1.3 研究目的 2
1.4 研究限制 3
1.5 論文架構與流程 3
第貳章、文獻探討 5
2.1 Python 5
2.2 Flask 5
2.3 線上考試監督系統 6
2.4 螢幕錄影 7
2.5 WebRTC 7
2.6 HLS串流協定 8
2.7 FFmpeg 9
2.8 OCR 9
第參章、系統設計 10
3.1 系統介紹 10
3.2 系統設計之目的 10
3.3 系統架構圖 11
3.4 測驗的流程 12
3.4.1 學習者錄影 14
3.4.2 影片上傳方法 15
3.4.3 上傳資料 16
3.4.4 影片處理 17
3.4.5 資料庫欄位說明 21
3.4.6 影片調閱 22
第肆章、系統實驗 24
4.1 實驗環境介紹 24
4.2 實驗設計 25
4.2.1 實驗一：探討分段式上傳與一次性上傳的差異 25
4.2.2 實驗二：探討每T秒上傳檔案對記憶體以及CPU造成的影響 27
4.2.3 實驗三：探討解析度對記憶體以及CPU造成的影響 29
4.2.4 實驗四：探討不同解析度畫面，以OCR方式進行文字辨識結果 31
4.2.5 實驗五：探討調整bitrate來觀察最終容量的變化量 32
4.2.6 實驗六：探討調整bitrate後的畫面結果，以OCR辨識文字之準確率 34
第伍章、結論 35
5.1 結論 35
參考文獻 36

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