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    # 多媒體爬蟲 # https://reurl.cc/xOgDze ## 上次的練習 https://colab.research.google.com/drive/1qaW6z63OVckxUNLKCbyVNn8fOStoeGGU ### 選課程式 https://colab.research.google.com/drive/1YU18W7jFONbzNR4N-Dbn4-OpCx9G3fiz ## 圖片 直接get網址就好,之後將內容直接存檔 ![](https://media.sproutsocial.com/uploads/2017/02/10x-featured-social-media-image-size.png) 我們把上面那張圖片抓下來 ```python= import requests headers={'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.135 Safari/537.36', } #網址 url='https://media.sproutsocial.com/uploads/2017/02/10x-featured-social-media-image-size.png' #requests respone=requests.get(url=url,headers=headers,stream=True) #寫入檔案,以bytes的形式寫入 file=open('image.png','wb') file.write(respone.content) file.close() ``` ### 漫畫 其中困難的地方就只有撈出網址而已,詳情 https://github.com/upbit/pixivpy >p網 python 套件 ## HLS #### HTTP Live Streaming HTTP 即時串流 (HLS) 是最廣泛使用的影片串流通訊協定之一。儘管它名為 HTTP 「即時」串流,它同時用於隨選和即時串流。HLS 將影片檔案細分為較小且可下載的 HTTP 檔案,並用 HTTP 通訊協定傳遞檔案。用戶端裝置接著載入這些 HTTP 檔案,並以影片的格式播放。 HLS 的一個優點是:所有網路連線裝置都支援 HTTP,因此比需要專用伺服器的串流通訊協定更容易實行。另一好處是:HLS 串流可視網路狀況提高或降低影片品質,卻不干擾播放進度。因此,使用者觀看影片時,影片品質可能會變好或變壞。這個功能稱為「自適應位元速率影片傳遞」或「自適應位元速率串流」。若無此功能,緩慢的網速可能會導致影片停播。 HLS 是由 Apple 開發,用於 Apple 產品,但目前已用於廣泛系列的裝置。 **又因為HTTP 的傳輸層是使用TCP通訊協定,當傳輸資料遺失時會要求重傳,因此容易造成延遲。** [Native HLS Playback 擴充套件](https://chrome.google.com/webstore/detail/native-hls-playback/emnphkkblegpebimobpbekeedfgemhof/related?hl=zh-TW) 範例 https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8 [詳細介紹](https://ithelp.ithome.com.tw/articles/10203792) ### m3u8 > M3U檔案的作用通常是建立指向線上串流媒體的播放列表,建立的檔案可以輕鬆存取串流媒體。M3U檔案通常作為網站的下載資源、通過email收發,並可以收聽網路電台。 實作: https://colab.research.google.com/drive/1DT4gWwVeRYTv2p3nNXdXJhvrjiwOtbhg ## 練習 http://myself-bbs.com/portal.php 爬他 ## youtube-dl https://github.com/ytdl-org/youtube-dl 不要取笑 https://colab.research.google.com/drive/14Vzb6b76wHOOLG8hLqdzpceX07f4kjBg ```python= from google.colab import drive drive.mount('/content/drive') import os os.chdir('/content/drive/My Drive') ```

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