File size: 4,376 Bytes
345855e | 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 | import os
import uuid
import asyncio
import subprocess
from datetime import datetime
# -------------------------------------------------
# SAFE OUTPUT DIRECTORY
# -------------------------------------------------
OUTPUT_DIR = "jobs/renders"
os.makedirs(OUTPUT_DIR, exist_ok=True)
# -------------------------------------------------
# CONTEXT NORMALIZER
# -------------------------------------------------
def normalize_context(context):
if isinstance(context, dict):
return {
"video_path": context.get("video_path"),
"srt": context.get("srt"),
"subtitles": context.get("subtitles")
}
return {
"video_path": getattr(context, "video_path", None),
"srt": getattr(context, "srt", None),
"subtitles": getattr(context, "subtitles", None)
}
# -------------------------------------------------
# SRT RESOLVER
# -------------------------------------------------
def resolve_srt(ctx):
"""
Accepts:
- raw SRT string
- file path
- None
"""
srt = ctx.get("srt")
if not srt:
return None
if isinstance(srt, str) and os.path.exists(srt):
with open(srt, "r", encoding="utf-8") as f:
return f.read()
return srt if isinstance(srt, str) else None
# -------------------------------------------------
# SAFE FFMPEG RENDER ENGINE
# -------------------------------------------------
def run_ffmpeg(video_path, srt_path, output_path):
cmd = [
"ffmpeg",
"-y",
"-i", video_path,
]
# Subtitle overlay (only if available)
if srt_path and os.path.exists(srt_path):
cmd += [
"-vf",
f"subtitles={srt_path}"
]
cmd += [
"-c:v", "libx264",
"-preset", "veryfast",
"-crf", "23",
"-c:a", "aac",
"-b:a", "128k",
output_path
]
process = subprocess.run(
cmd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True
)
if process.returncode != 0:
raise RuntimeError(process.stderr)
return output_path
# -------------------------------------------------
# MAIN ENTRYPOINT
# -------------------------------------------------
async def run(context):
ctx = normalize_context(context)
batch_id = str(uuid.uuid4())
started_at = datetime.utcnow().isoformat()
try:
video_path = ctx.get("video_path")
srt_data = resolve_srt(ctx)
if not video_path or not os.path.exists(video_path):
return {
"status": "error",
"task": "render",
"message": "Missing or invalid video_path",
"stage": "validation"
}
# -------------------------------------------------
# TEMP SRT FILE HANDLING
# -------------------------------------------------
srt_path = None
if srt_data:
srt_path = os.path.join(OUTPUT_DIR, f"{batch_id}.srt")
with open(srt_path, "w", encoding="utf-8") as f:
f.write(srt_data)
output_path = os.path.join(
OUTPUT_DIR,
f"{batch_id}_render.mp4"
)
# -------------------------------------------------
# FFMPEG EXECUTION (THREAD SAFE)
# -------------------------------------------------
await asyncio.to_thread(
run_ffmpeg,
video_path,
srt_path,
output_path
)
# -------------------------------------------------
# CLEANUP OPTIONAL
# -------------------------------------------------
if srt_path and os.path.exists(srt_path):
os.remove(srt_path)
# -------------------------------------------------
# RESPONSE
# -------------------------------------------------
return {
"status": "success",
"task": "render",
"batch_id": batch_id,
"started_at": started_at,
"completed_at": datetime.utcnow().isoformat(),
"output_path": output_path
}
except Exception as e:
return {
"status": "error",
"task": "render",
"batch_id": batch_id,
"message": str(e),
"stage": "render_failed"
} |