add render command

render.py

@@ -0,0 +1,126 @@
+#!/usr/bin/python3
+import json
+import os
+import subprocess
+import sys
+import time
+
+import ox
+from pi import random
+from render_kdenlive import KDEnliveProject
+
+
+def random_choice(seq, items, pop=False):
+    n = n_ = len(items) - 1
+    #print('len', n)
+    if n == 0:
+        return items[0]
+    r = seq()
+    base = 10
+    while n > 10:
+        n /= 10
+        #print(r)
+        r += seq()
+        base += 10
+    r = int(n_ * r / base)
+    #print('result', r, items)
+    if pop:
+        return items.pop(r)
+    return items[r]
+
+def chance(seq, chance):
+    return (seq() / 10) >= chance
+
+
+def compose(clips, target=150, base=1024):
+    length = 0
+    scene = {
+        'front': {
+            'V1': [],
+            'V2': [],
+        },
+        'back': {
+            'V1': [],
+            'V2': [],
+        },
+        'audio': {
+            'A1': [],
+            'A2': [],
+            'A3': [],
+            'A4': [],
+        }
+    }
+    seq = random(base)
+    while target - length > 10 and clips:
+        clip = random_choice(seq, clips, True)
+        if length + clip['duration'] > target:
+            break
+        length += clip['duration']
+
+        scene['front']['V1'].append({
+            'duration': clip['duration'],
+            'src': clip['foreground'],
+            "filter": {
+                'transparency': seq() / 10,
+            }
+        })
+
+        transparency = seq() / 10
+        # coin flip which site is visible (50% chance)
+        if chance(seq, 0.5):
+            transparency_front = transparency
+            transparency_back = 0
+        else:
+            transparency_back = transparency
+            transparency_front = 0
+        scene['front']['V2'].append({
+            'duration': clip['duration'],
+            'src': clip['background'],
+            "filter": {
+                'transparency': transparency_front
+            }
+        })
+        scene['back']['V1'].append({
+            'duration': clip['duration'],
+            'src': clip['background'],
+            "filter": {
+                'transparency': transparency_back
+            }
+        })
+        scene['back']['V2'].append({
+            'duration': clip['duration'],
+            'src': clip['original'],
+            "filter": {
+                'transparency': seq() / 10,
+            }
+        })
+        # 50 % chance to blur original from 0 to 30
+        if chance(seq, 0.5):
+            blur = seq() * 3
+            scene['back']['V2'][-1]['filter']['blur'] = blur
+        scene['audio']['A1'].append({
+            'duration': clip['duration'],
+            'src': clip['original'],
+        })
+        scene['audio']['A2'].append({
+            'duration': clip['duration'],
+            'src': clip['foreground'],
+        })
+    return scene
+
+
+def render(root, scene):
+    fps = 24
+    for timeline, data in scene.items():
+        print(timeline)
+        project = KDEnliveProject(root)
+
+        tracks = []
+        for track, clips in data.items():
+            print(track)
+            for clip in clips:
+                project.append_clip(track, clip)
+
+        with open(os.path.join(prefix, "%s.kdenlive" % timeline), 'w') as fd:
+            fd.write(project.to_xml())
+