audio rendering fixes

ffmpeg.py

@@ -75,7 +75,7 @@ for clip in edit:
     if 'display_aspect_ratio' in src_info['video'][0]:
         ratio = [int(p) for p in src_info['video'][0]['display_aspect_ratio'].split(':')]
         clip_aspect = ratio[0] / ratio[1]
-        print(ratio, clip_aspect)
+        #print(clip['path'], ratio, clip_aspect)
     if clip_aspect < aspect:
         x = width
         y = int(x / clip_aspect)
@@ -115,11 +115,11 @@ for clip in edit:
         else:
             aid = src_info['audio'][0]['id']
             audio = []
-            audio_map = ['-map', '0:%s,0:0' % aid, '-map', '0:%s,0:1' % vid]
             if clip.get('volume', 1) != 1:
-                audio_map += [
+                audio += [
                     '-filter:a', 'volume=%s' % clip['volume']
                 ]
+            audio_map = ['-map', '0:%s,0:0' % aid, '-map', '0:%s,0:1' % vid]
         cmd = [
             'ffmpeg',
             '-hide_banner',