From e8d3d7b128851264958ff273a4296049ecec675c Mon Sep 17 00:00:00 2001
From: "g.minoccari" <g.minoccari@gmail.com>
Date: Wed, 7 Oct 2020 15:49:05 +0200
Subject: [PATCH] Create aulavirtuale-dl.py

Commit iniziale con lo script, verra' aggiornato man mano che le lezioni verranno aggiunte
---
 aulavirtuale-dl.py | 77 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 aulavirtuale-dl.py

diff --git a/aulavirtuale-dl.py b/aulavirtuale-dl.py
new file mode 100644
index 0000000..5016e08
--- /dev/null
+++ b/aulavirtuale-dl.py
@@ -0,0 +1,77 @@
+import os
+from bs4 import BeautifulSoup
+import urllib
+
+
+#Base link to the lessons page
+edunovaLink = "https://davy04.edunova.it/presentation/"
+#Relative path to the slides video
+videoSuffix = "/deskshare/deskshare.webm"
+#Relative path to the presentation audio
+audioSuffix = "/video/webcams.mp4"
+#slides = "https://davy04.edunova.it/presentation/17d59e4eb742c498e605406fd441c1a2d7eb4bf0-1601024050226/shapes.svg"
+
+os.makedirs("VideoLezioni", exist_ok=True)
+os.chdir("VideoLezioni")
+
+#Dictionary containing the id of the saved lessons
+meetingsID = {
+    '021020': '17d59e4eb742c498e605406fd441c1a2d7eb4bf0-1601628738707',
+    '290920': '17d59e4eb742c498e605406fd441c1a2d7eb4bf0-1601380547311',
+    '250920': '17d59e4eb742c498e605406fd441c1a2d7eb4bf0-1601024050226'
+            }
+
+for (date, meetId) in meetingsID.items():
+    if(os.path.exists(f"Gestione{date}joinedWithSlide.mp4")):
+        continue
+
+    #Assemblo il comando ffmpeg con i riferimenti web a video e audio della presentazione con id {meetId}
+    downloadAndJoin = f"ffmpeg -i {edunovaLink}{meetId}{videoSuffix} -i {edunovaLink}{meetId}{audioSuffix} -map 0:v -map 1:a -c:v copy -shortest Gestione{date}joined.mp4"
+    os.system(downloadAndJoin)
+    svgSlide = urllib.request.urlopen(f"{edunovaLink}{meetId}/shapes.svg").read()
+
+    soup = BeautifulSoup(svgSlide, 'html.parser')
+    usefulImg = []
+    for img in soup.find_all('image'):
+        
+        start = img.get('in')
+        end = img.get('out')
+        imgLink = img.get('xlink:href')
+        if(not imgLink.endswith("deskshare.png")):
+            usefulImg.append([float(start), float(end), imgLink])
+
+    imgSorted = sorted(usefulImg)
+    print(imgSorted)
+    if(len(imgSorted)==0):
+        continue
+
+    slideBase = f"{edunovaLink}{meetId}/"
+
+    imgLinkList = ''
+    imgScaleList = ''
+    for l in imgSorted:
+        imgLinkList += f"-i \"{slideBase}{l[2]}\" "
+
+    for i in range(len(imgSorted)):
+        imgScaleList += f"[{i+1}:v] scale=1280:720 [ol{i}]; "
+
+    imgOverlayList = f"[0:v] [ol0] overlay=0:0:enable='between(t,{int(imgSorted[0][0])},{int(imgSorted[0][1])})' [olo0]; "
+
+    for i in range(1, len(imgSorted)-1):
+        imgOverlayList += f"[olo{i-1}] [ol{i}] overlay=0:0:enable='between(t,{int(imgSorted[i][0])},{int(imgSorted[i][1])})' [olo{i}]; "
+
+    imgOverlayList += f"[olo{len(imgSorted)-1-1}] [ol{len(imgSorted)-1}] overlay=0:0:enable='between(t,{int(imgSorted[len(imgSorted)-1][0])},{int(imgSorted[len(imgSorted)-1][1])})'"
+    
+    #Informazioni di debug sulle immagini e sui momenti nei quali inserirle nel video
+    print(imgLinkList)
+    print(imgScaleList)
+    print(imgOverlayList)
+
+    #Comando di esempio di utilizzo di ffmpeg per incollare diverse immagini in diversi momenti su un video
+    #ffmpeg -i Untitled.mp4 -i slide-1.png -i slide-2.png -filter_complex "[1:v] scale=640:480 [ol]; [2:v] scale=640:480 [ol2]; [0:v] [ol] overlay=0:0:enable='between(t,0,20)' [ol1]; [ol1] [ol2] overlay=0:0:enable='between(t, 30,40)'" -codec:a copy example_marked.mp4
+
+    ffmpegCommand = f'ffmpeg -i Gestione{date}joined.mp4 {imgLinkList} -filter_complex "{imgScaleList}{imgOverlayList}" -codec:a copy Gestione{date}joinedWithSlide.mp4'
+
+    os.system(ffmpegCommand)
+    #Rimuovo il file intermedio senza slide
+    os.remove(f"Gestione{date}joined.mp4")