File size: 8,859 Bytes
3e3d7b1 48ded4d 3e3d7b1 48ded4d 3e3d7b1 48ded4d 3e3d7b1 48ded4d 3e3d7b1 48ded4d 3e3d7b1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | from __future__ import annotations
import mimetypes
import shutil
import time
from pathlib import Path
from renderer.audio import AudioMixer
from renderer.core.config import Settings
from renderer.core.ingest import AssetIngestor
from renderer.core.models import AIReelsRequest, RenderRequest, RenderResult
from renderer.core.utils import cleanup_directory, temp_workdir
from renderer.exports import ExportManager
from renderer.ffmpeg.assets import AssetProbe
from renderer.ffmpeg.command import FFmpegCommand
from renderer.ffmpeg.normalize import Normalizer
from renderer.ffmpeg.runner import FFmpegRunner
from renderer.scenes import Timeline
from renderer.subtitles import SubtitleGenerator
from renderer.transitions import TransitionBuilder
class RenderEngine:
def __init__(self, settings: Settings | None = None, log=None) -> None:
self.settings = settings or Settings()
self.settings.ensure_dirs()
self._commands: list[list[str]] = []
self._logs: list[str] = []
self.runner = FFmpegRunner(self.settings.ffmpeg_timeout_seconds, log=log, on_command=self._record_command)
self.ingest = AssetIngestor(self.settings)
self.assets = AssetProbe(self.settings.metadata_cache)
self.normalizer = Normalizer(self.settings, self.runner)
self.subtitles = SubtitleGenerator()
self.transitions = TransitionBuilder()
self.audio = AudioMixer(self.runner)
self.exports = ExportManager(self.settings.exports_dir)
def render(self, request: RenderRequest, job_id: str) -> RenderResult:
self._commands = []
self._logs = []
started = time.time()
timeline = Timeline(request.scenes)
with temp_workdir(self.settings.temp_dir, job_id) as work:
workdir = Path(work)
resolved = self.ingest.resolve_render_request(request, workdir)
timeline = Timeline(resolved.scenes)
prepared = self._prepare_scene_media(resolved, workdir)
subtitles = self._write_subtitles(resolved, timeline, workdir)
video = self._compose_video(prepared, resolved, subtitles, workdir)
mixed = self.audio.mix(video, resolved.background_music, resolved.voiceover, workdir / "mixed.mp4")
output = self.exports.save(mixed, job_id, request.output_name)
cleanup_directory(workdir, keep={mixed})
metrics = {
"render_time_seconds": round(time.time() - started, 3),
"output_size_bytes": output.stat().st_size,
"scene_count": len(request.scenes),
}
return RenderResult(output_path=output, commands=list(self._commands), metrics=metrics, logs=list(self._logs))
def ai_reels(self, request: AIReelsRequest, job_id: str) -> RenderResult:
if not request.voiceover:
raise ValueError("AI reels v1 requires a provided voiceover path; TTS is pluggable but not bundled.")
if not request.assets:
raise ValueError("AI reels rendering requires at least one visual asset.")
with temp_workdir(self.settings.temp_dir, job_id) as work:
workdir = Path(work)
resolved = self.ingest.resolve_ai_reels_request(request, workdir)
voice_meta = self.assets.probe(resolved.voiceover)
duration = max(voice_meta.duration, len(resolved.script.split()) * 0.35, 3.0)
per_scene = duration / max(1, len(resolved.assets))
captions = _split_script(resolved.script, len(resolved.assets))
scenes = [
{
"start": round(idx * per_scene, 3),
"duration": round(per_scene, 3),
"media": asset,
"caption": captions[idx] if idx < len(captions) else "",
}
for idx, asset in enumerate(resolved.assets)
]
render_request = RenderRequest(
scenes=Timeline.request_from_payload({"scenes": scenes}).scenes,
template=resolved.template,
output_name=resolved.output_name,
voiceover=resolved.voiceover,
background_music=resolved.background_music,
)
return self._render_resolved(render_request, job_id, workdir)
def inspect_asset(self, path: str | Path) -> dict:
return self.assets.probe(path).__dict__
def _render_resolved(self, request: RenderRequest, job_id: str, workdir: Path) -> RenderResult:
self._commands = []
self._logs = []
started = time.time()
timeline = Timeline(request.scenes)
prepared = self._prepare_scene_media(request, workdir)
subtitles = self._write_subtitles(request, timeline, workdir)
video = self._compose_video(prepared, request, subtitles, workdir)
mixed = self.audio.mix(video, request.background_music, request.voiceover, workdir / "mixed.mp4")
output = self.exports.save(mixed, job_id, request.output_name)
metrics = {
"render_time_seconds": round(time.time() - started, 3),
"output_size_bytes": output.stat().st_size,
"scene_count": len(request.scenes),
}
return RenderResult(output_path=output, commands=list(self._commands), metrics=metrics, logs=list(self._logs))
def _prepare_scene_media(self, request: RenderRequest, workdir: Path) -> list[Path]:
prepared: list[Path] = []
for idx, scene in enumerate(request.scenes):
source = Path(scene.media)
metadata = self.assets.probe(source)
target = workdir / f"scene_{idx:03d}.mp4"
mime_type = metadata.mime_type or mimetypes.guess_type(str(source))[0] or ""
if mime_type.startswith("image/") or source.suffix.lower() in {".jpg", ".jpeg", ".png", ".webp", ".gif"}:
self.normalizer.image_to_video(source, target, scene.duration)
elif request.normalize and self.normalizer.needs_normalization(metadata):
self.normalizer.normalize(source, target, scene.duration)
else:
shutil.copy2(source, target)
prepared.append(target)
return prepared
def _write_subtitles(self, request: RenderRequest, timeline: Timeline, workdir: Path) -> Path | None:
events = self.subtitles.from_scenes(request.scenes, timeline.total_duration)
if not events:
return None
if request.subtitle_format == "srt":
return self.subtitles.write_srt(events, workdir / "captions.srt")
return self.subtitles.write_ass(events, workdir / "captions.ass", request.template)
def _compose_video(self, scenes: list[Path], request: RenderRequest, subtitle_path: Path | None, workdir: Path) -> Path:
if len(scenes) == 1:
composed = workdir / "composed.mp4"
shutil.copy2(scenes[0], composed)
else:
composed = workdir / "composed.mp4"
durations = [scene.duration for scene in request.scenes]
transitions = [scene.transition for scene in request.scenes]
filter_graph, final_stream = self.transitions.xfade_chain(len(scenes), durations, transitions)
cmd = FFmpegCommand().add("-hide_banner")
for scene in scenes:
cmd.input(scene)
cmd.add("-filter_complex", filter_graph)
cmd.add("-map", final_stream, "-an", "-c:v", "libx264", "-preset", self.settings.preset, "-crf", self.settings.crf)
command = cmd.overwrite().add(composed).build()
self._run(command)
if subtitle_path:
subtitled = workdir / "subtitled.mp4"
escaped = _ffmpeg_subtitle_path(subtitle_path)
command = (
FFmpegCommand()
.add("-hide_banner")
.input(composed)
.add("-vf", f"subtitles='{escaped}'", "-c:a", "copy", "-c:v", "libx264", "-preset", self.settings.preset, "-crf", self.settings.crf)
.overwrite()
.add(subtitled)
.build()
)
self._run(command)
return subtitled
return composed
def _run(self, command: list[str]) -> None:
result = self.runner.run(command)
if result.stderr:
self._logs.append(result.stderr[-4000:])
def _record_command(self, command: list[str]) -> None:
self._commands.append(command)
def _split_script(script: str, chunks: int) -> list[str]:
words = script.split()
if chunks <= 0:
return []
size = max(1, round(len(words) / chunks))
return [" ".join(words[i : i + size]) for i in range(0, len(words), size)][:chunks]
def _ffmpeg_subtitle_path(path: Path) -> str:
return str(path).replace("\\", "/").replace(":", r"\:")
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