render subtitles

management/commands/generate_clips.py

@@ -99,9 +99,13 @@ class Command(BaseCommand):
             if os.path.islink(target):
                 os.unlink(target)
             os.symlink(src, target)
+            subs = []
+            for sub in vo.annotations.filter(layer="subtitles").exclude(value="").order_by("start"):
+                subs.append(sub.json(keys=['in', 'out', 'value']))
             voice_over[fragment_id][batch] = {
                 "src": target,
-                "duration": source.duration
+                "duration": source.duration,
+                "subs": subs
             }
         with open(os.path.join(prefix, 'voice_over.json'), 'w') as fd:
             json.dump(voice_over, fd, indent=2, ensure_ascii=False)

render.py

@@ -95,6 +95,7 @@ def compose(clips, target=150, base=1024, voice_over=None):
                 voice_overs.append(voice_over[vo2])
         print("vo:", [x['src'] for x in voice_overs], list(sorted(voice_over)))
         vo_min = sum([vo['duration'] for vo in voice_overs])
+        sub_offset = 0
         if vo_min > target:
             target = vo_min
         elif vo_min < target:
@@ -108,6 +109,8 @@ def compose(clips, target=150, base=1024, voice_over=None):
                 'duration': offset
             })
             vo_min += offset
+            sub_offset = offset
+        subs = []
         for vo in voice_overs:
             voc = vo.copy()
             a, b = '3', '-6'
@@ -124,6 +127,14 @@ def compose(clips, target=150, base=1024, voice_over=None):
             vo_low = vo.copy()
             vo_low['filter'] = {'volume': b}
             scene['audio-rear']['A1'].append(vo_low)
+            for sub in voc.get("subs", []):
+                sub = sub.copy()
+                sub["in"] += sub_offset
+                sub["out"] += sub_offset
+                subs.append(sub)
+            sub_offset += voc["duration"]
+        if subs:
+            scene["subtitles"] = subs
 
     clip = None
     while target - length > 0 and clips:
@@ -270,6 +281,10 @@ def render(root, scene, prefix=''):
     files = []
     scene_duration = int(get_scene_duration(scene) * 24)
     for timeline, data in scene.items():
+        if timeline == "subtitles":
+            with open(os.path.join(root, prefix + "front.srt"), "wb") as fd:
+                fd.write(ox.srt.encode(data))
+            continue
         #print(timeline)
         project = KDEnliveProject(root)