Spaces:
Sleeping
Sleeping
File size: 15,615 Bytes
fd50325 48b474c fd50325 48b474c fd50325 48b474c fd50325 48b474c fd50325 2278049 | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 | """
Video Compression and Storage Service for DetectifAI
This module handles video compression and MinIO storage for compressed videos.
"""
import os
import cv2
import subprocess
import logging
from io import BytesIO
from typing import Dict, Optional
from datetime import timedelta
from minio.error import S3Error
logger = logging.getLogger(__name__)
class VideoCompressionService:
"""Service for compressing videos and storing in S3-compatible storage"""
def __init__(self, db_manager, config=None):
self._db_manager = db_manager
self.bucket = db_manager.config.minio_video_bucket # Store compressed videos in the videos bucket
self.config = config
# Default compression settings
self.output_resolution = "720p" # 720p for web delivery
self.compression_crf = 23 # 0-51, lower = better quality (23 is default)
self.compression_preset = "medium" # ultrafast to veryslow
# Check if FFmpeg is available
self.ffmpeg_available = self._check_ffmpeg_available()
@property
def minio(self):
"""Lazy access to S3 storage — tolerates unavailable storage"""
return self._db_manager.minio_client
def _check_ffmpeg_available(self) -> bool:
"""Check if FFmpeg is available on the system"""
try:
result = subprocess.run(
['ffmpeg', '-version'],
capture_output=True,
text=True,
timeout=5
)
return result.returncode == 0
except (subprocess.TimeoutExpired, FileNotFoundError, subprocess.SubprocessError):
return False
def compress_and_store(self, input_path: str, video_id: str) -> Optional[Dict]:
"""Compress video and store in MinIO and locally"""
try:
# Create local storage directory
local_dir = os.path.join("video_processing_outputs", "compressed", video_id)
os.makedirs(local_dir, exist_ok=True)
local_path = os.path.join(local_dir, "video.mp4")
# Use BytesIO for in-memory compression
from io import BytesIO
compressed_buffer = BytesIO()
# Try FFmpeg first if available, otherwise use OpenCV
if self.ffmpeg_available:
success = self._compress_with_ffmpeg_to_buffer(input_path, compressed_buffer)
if not success:
logger.warning("FFmpeg compression failed, falling back to OpenCV")
compressed_buffer.seek(0) # Reset buffer position
success = self._compress_with_opencv_to_buffer(input_path, compressed_buffer)
else:
logger.info("FFmpeg not available, using OpenCV compression")
success = self._compress_with_opencv_to_buffer(input_path, compressed_buffer)
if not success:
logger.error("Both compression methods failed")
return None
# Get buffer contents
compressed_buffer.seek(0)
compressed_data = compressed_buffer.getvalue()
compressed_size = len(compressed_data)
# Save locally
with open(local_path, 'wb') as f:
f.write(compressed_data)
logger.info(f"✅ Video saved locally: {local_path}")
# Calculate compression stats
original_size = os.path.getsize(input_path)
compression_ratio = ((original_size - compressed_size) / original_size) * 100
# Upload directly to S3 using consistent path structure (skip if unavailable)
minio_path = None
if self.minio is not None:
try:
minio_path = f"compressed/{video_id}/video.mp4"
compressed_buffer.seek(0) # Reset buffer for S3 upload
self.minio.put_object(
self.bucket,
minio_path,
compressed_buffer,
length=compressed_size,
content_type='video/mp4'
)
except Exception as s3_err:
logger.warning(f"⚠️ S3 upload skipped for compressed video: {s3_err}")
minio_path = None
else:
logger.info("S3 storage unavailable — compressed video stored locally only")
result = {
'success': True,
'minio_path': minio_path,
'local_path': local_path,
'original_size': original_size,
'compressed_size': compressed_size,
'compression_ratio': round(compression_ratio, 2),
'output_resolution': self.output_resolution
}
logger.info(f"✅ Video compressed and stored: {compression_ratio:.1f}% reduction")
return result
except Exception as e:
logger.error(f"❌ Compression and storage failed: {e}")
return None
def get_compressed_video_presigned_url(self, video_id: str, expires: timedelta = timedelta(hours=1)) -> str:
"""Generate presigned URL for compressed video access"""
if self.minio is None:
return None
try:
minio_path = f"compressed/{video_id}/video.mp4"
return self.minio.presigned_get_object(self.bucket, minio_path, expires=expires)
except S3Error as e:
logger.error(f"❌ Failed to generate presigned URL for compressed video: {e}")
return None
def _compress_with_ffmpeg(self, input_path: str, output_path: str) -> bool:
"""Compress video using FFmpeg"""
try:
# Build FFmpeg command
cmd = [
'ffmpeg',
'-i', input_path,
'-c:v', 'libx264', # H.264 codec
'-crf', str(self.compression_crf),
'-preset', self.compression_preset,
'-movflags', '+faststart', # Enable web playback
'-y' # Overwrite output file
]
# Add resolution scaling if needed
if self.output_resolution == "720p":
cmd.extend(['-vf', "scale='min(1280,iw)':'min(720,ih)':force_original_aspect_ratio=decrease,pad=ceil(iw/2)*2:ceil(ih/2)*2"])
elif self.output_resolution == "480p":
cmd.extend(['-vf', "scale='min(854,iw)':'min(480,ih)':force_original_aspect_ratio=decrease,pad=ceil(iw/2)*2:ceil(ih/2)*2"])
cmd.append(output_path)
# Run FFmpeg
result = subprocess.run(
cmd,
capture_output=True,
text=True
)
if result.returncode == 0 and os.path.exists(output_path):
logger.info("✅ FFmpeg compression successful")
return True
else:
logger.error(f"FFmpeg error: {result.stderr}")
return False
except Exception as e:
logger.error(f"FFmpeg compression failed: {e}")
return False
def _compress_with_ffmpeg_to_buffer(self, input_path: str, output_buffer: BytesIO) -> bool:
"""Compress video using FFmpeg with temporary file (more reliable than pipe)"""
import tempfile
try:
# Create temporary file for FFmpeg output
with tempfile.NamedTemporaryFile(suffix='.mp4', delete=False) as temp_file:
temp_path = temp_file.name
# Build FFmpeg command to output to temporary file
cmd = [
'ffmpeg',
'-i', input_path,
'-c:v', 'libx264', # H.264 codec
'-crf', str(self.compression_crf),
'-preset', self.compression_preset,
'-movflags', '+faststart', # Enable web playback (safe for file output)
'-y' # Overwrite output
]
# Add resolution scaling if needed
if self.output_resolution == "720p":
cmd.extend(['-vf', "scale='min(1280,iw)':'min(720,ih)':force_original_aspect_ratio=decrease,pad=ceil(iw/2)*2:ceil(ih/2)*2"])
elif self.output_resolution == "480p":
cmd.extend(['-vf', "scale='min(854,iw)':'min(480,ih)':force_original_aspect_ratio=decrease,pad=ceil(iw/2)*2:ceil(ih/2)*2"])
# Add output file
cmd.append(temp_path)
# Run FFmpeg
result = subprocess.run(
cmd,
capture_output=True,
text=True,
timeout=300 # 5 minute timeout
)
if result.returncode == 0 and os.path.exists(temp_path):
# Read temporary file into buffer
with open(temp_path, 'rb') as f:
output_buffer.write(f.read())
# Clean up temporary file
os.unlink(temp_path)
logger.info("✅ FFmpeg compression to buffer successful")
return True
else:
# Clean up temporary file on error
if os.path.exists(temp_path):
os.unlink(temp_path)
logger.error(f"FFmpeg error: {result.stderr}")
return False
except Exception as e:
logger.error(f"FFmpeg compression to buffer failed: {e}")
return False
def _compress_with_opencv_to_buffer(self, input_path: str, output_buffer: BytesIO) -> bool:
"""Fallback compression using OpenCV directly to a buffer"""
try:
# Open input video
cap = cv2.VideoCapture(input_path)
if not cap.isOpened():
logger.error(f"Cannot open input video: {input_path}")
return False
# Get video properties
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
fps = cap.get(cv2.CAP_PROP_FPS)
# Calculate new dimensions
if self.output_resolution == "720p":
new_height = 720
new_width = int((width / height) * new_height)
elif self.output_resolution == "480p":
new_height = 480
new_width = int((width / height) * new_height)
else:
new_width, new_height = width, height
# Create temporary file for OpenCV (required for VideoWriter)
import tempfile
with tempfile.NamedTemporaryFile(suffix='.mp4', delete=False) as temp_file:
temp_path = temp_file.name
# Create video writer with best available codec
# Prioritize H.264 (avc1) for browser compatibility
codecs_to_try = [
('avc1', 'H.264'),
('h264', 'H.264'),
('X264', 'H.264'),
('mp4v', 'MPEG-4')
]
out = None
used_codec = None
for fourcc_code, name in codecs_to_try:
try:
fourcc = cv2.VideoWriter_fourcc(*fourcc_code)
out = cv2.VideoWriter(temp_path, fourcc, fps, (new_width, new_height))
if out.isOpened():
used_codec = name
logger.info(f"✅ Using codec: {name} ({fourcc_code})")
break
out.release()
except Exception as e:
logger.debug(f"Codec {fourcc_code} failed: {e}")
if not out or not out.isOpened():
logger.error("❌ No suitable video codec found")
return False
while True:
ret, frame = cap.read()
if not ret:
break
# Resize frame if needed
if (new_width, new_height) != (width, height):
frame = cv2.resize(frame, (new_width, new_height))
out.write(frame)
cap.release()
out.release()
# Read compressed file into buffer
if os.path.exists(temp_path):
with open(temp_path, 'rb') as f:
output_buffer.write(f.read())
os.unlink(temp_path) # Delete temporary file
logger.info("✅ OpenCV compression to buffer successful")
return True
else:
logger.error("OpenCV compression failed - output file not created")
return False
except Exception as e:
logger.error(f"OpenCV compression to buffer failed: {e}")
return False
def _compress_with_opencv(self, input_path: str, output_path: str) -> bool:
"""Fallback compression using OpenCV"""
try:
# Open input video
cap = cv2.VideoCapture(input_path)
if not cap.isOpened():
logger.error(f"Cannot open input video: {input_path}")
return False
# Get video properties
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
fps = cap.get(cv2.CAP_PROP_FPS)
# Calculate new dimensions
if self.output_resolution == "720p":
new_height = 720
new_width = int((width / height) * new_height)
elif self.output_resolution == "480p":
new_height = 480
new_width = int((width / height) * new_height)
else:
new_width, new_height = width, height
# Create video writer
fourcc = cv2.VideoWriter_fourcc(*'mp4v')
out = cv2.VideoWriter(
output_path,
fourcc,
fps,
(new_width, new_height)
)
while True:
ret, frame = cap.read()
if not ret:
break
# Resize frame
if (new_width, new_height) != (width, height):
frame = cv2.resize(frame, (new_width, new_height))
out.write(frame)
cap.release()
out.release()
if os.path.exists(output_path):
logger.info("✅ OpenCV compression successful")
return True
else:
logger.error("OpenCV compression failed - output file not created")
return False
except Exception as e:
logger.error(f"OpenCV compression failed: {e}")
return False |