pandora_p_for_power/render_sound.py

import os
import shutil
import subprocess

import ox

import itemlist.models
import item.models

from .render_kdenlive import KDEnliveProject, _CACHE
from .render import default_prefix as root
from .render import load_defaults

def render_all(options):
    if not options["force"] and os.path.exists(os.path.join(root, "render/forest-5.1.mp4")):
        print("forest-5.1.mp4 exists, skipping")
    else:
        render_forest()
    if not options["force"] and os.path.exists(os.path.join(root, "render/music-5.1.mp4")):
        print("music-5.1.mp4 exists, skipping")
    else:
        render_music()

def render_music():
    # Stereo Mix, playing on 5.1 front left/right
    project = KDEnliveProject(root)
    qs = item.models.Item.objects.filter(
        data__type__icontains='music'
    ).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": {
                'volume': '0',
            },
        })

    path = os.path.join(root, "music.kdenlive")
    with open(path, 'w') as fd:
        fd.write(project.to_xml())

    os.chdir(root)
    cmd = [
        "melt", "music.kdenlive", '-quiet', '-consumer', 'avformat:music.wav'
    ]
    print(" ".join([str(x) for x in cmd]))
    subprocess.call(cmd)
    info = ox.avinfo('music.wav')
    cmds = []
    cmds.append([
        "ffmpeg", "-y",
        "-nostats", "-loglevel", "error",
        "-f", "lavfi", "-i", "anullsrc=r=48000:cl=mono",
        "-t", str(info["duration"]),
        "music_silence.wav"
    ])

    for src, out1, out2 in (
        ('music.wav', "music_left.wav", "music_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", "music_left.wav",
        "-i", "music_right.wav",
        "-i", "music_silence.wav",
        "-i", "music_silence.wav",
        "-i", "music_silence.wav",
        "-i", "music_silence.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/music-5.1-new.mp4"
    ])
    for cmd in cmds:
        print(" ".join([str(x) for x in cmd]))
        subprocess.call(cmd)
    shutil.move("render/music-5.1-new.mp4", "render/music-5.1.mp4")
    for name in (
        "music.kdenlive",
        "music.wav",
        "music_left.wav",
        "music_right.wav",
        "music_silence.wav",
    ):
        if os.path.exists(name):
            os.unlink(name)

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": {
                'volume': '0',
            },
        })

    path = os.path.join(root, "forest.kdenlive")
    with open(path, 'w') as fd:
        fd.write(project.to_xml())

    os.chdir(root)
    cmd = [
        "melt", "forest.kdenlive", '-quiet', '-consumer', 'avformat:forest.wav'
    ]
    print(" ".join([str(x) for x in cmd]))
    subprocess.call(cmd)
    info = ox.avinfo('forest.wav')
    cmds = []
    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", "forest_silence.wav",
        "-i", "forest_silence.wav",
        "-i", "forest_silence.wav",
        "-i", "forest_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-new.mp4"
    ])
    for cmd in cmds:
        print(" ".join([str(x) for x in cmd]))
        subprocess.call(cmd)
    shutil.move("render/forest-5.1-new.mp4", "render/forest-5.1.mp4")
    for name in (
        "forest.kdenlive",
        "forest.wav",
        "forest_left.wav",
        "forest_right.wav",
        "forest_silence.wav",
    ):
        if os.path.exists(name):
            os.unlink(name)