render updates

render_sound.py

@@ -0,0 +1,86 @@
+import os
+import subprocess
+
+import ox
+
+import itemlist.models
+import item.models
+
+from .render_kdenlive import KDEnliveProject, _CACHE
+from .render import default_prefix as root
+
+def render_music():
+    pass
+
+def render_forest():
+    # Stereo Mix, playing on 5.1 rear left/right
+    project = KDEnliveProject(root)
+    qs = item.models.Item.objects.filter(
+        data__type__icontains='Forest'
+    ).order_by('sort__title')
+
+    for clip in qs:
+        src = clip.files.all()[0].data.path
+        project.append_clip('A1', {
+            "src": src,
+            "duration": clip.sort.duration,
+            "filter": {
+            },
+        })
+
+    path = os.path.join(root, "forest.kdenlive")
+    with open(path, 'w') as fd:
+        fd.write(project.to_xml())
+
+    cmds = []
+    cmds.append([
+        "melt", "forest.kdenlive", '-quiet', '-consumer', 'avformat:forest.wav'
+    ])
+    info = ox.avinfo('forest.wav')
+    cmds.append([
+        "ffmpeg", "-y",
+        "-nostats", "-loglevel", "error",
+        "-f", "lavfi", "-i", "anullsrc=r=48000:cl=mono",
+        "-t", str(info["duration"]),
+        "forest_silence.wav"
+    ])
+
+    for src, out1, out2 in (
+        ('forest.wav', "forest_left.wav", "forest_right.wav"),
+    ):
+        cmds.append([
+            "ffmpeg", "-y",
+            "-nostats", "-loglevel", "error",
+            "-i", src,
+            "-filter_complex",
+            "[0:0]pan=1|c0=c0[left]; [0:0]pan=1|c0=c1[right]",
+            "-map", "[left]", out1,
+            "-map", "[right]", out2,
+        ])
+
+    cmds.append([
+        "ffmpeg", "-y",
+        "-nostats", "-loglevel", "error",
+        "-i", "silence.wav",
+        "-i", "silence.wav",
+        "-i", "silence.wav",
+        "-i", "silence.wav",
+        "-i", "forest_left.wav",
+        "-i", "forest_right.wav",
+        "-filter_complex", "[0:a][1:a][2:a][3:a][4:a][5:a]amerge=inputs=6[a]",
+        "-map", "[a]",
+        "-ar", "48000",
+        "-c:a", "aac", "render/forest-5.1.mp4"
+    ])
+    os.chdir(root)
+    for cmd in cmds:
+        print(" ".join([str(x) for x in cmd]))
+        subprocess.call(cmd)
+    for name in (
+        "forest.wav",
+        "forest_left.wav",
+        "forest_right.wav",
+        "silence.wav",
+    ):
+        if os.path.exists(name):
+            os.unlink(name)