feat(video): 添加硬件加速支持

- 定义硬件加速类型常量（none、qsv、cuda）
- 配置QSV和CUDA编码参数及预设
- 在WorkerConfig中添加硬件加速配置选项
- 实现基于硬件加速类型的编码参数动态获取
- 添加FFmpeg硬件加速解码和滤镜参数
- 检测并报告系统硬件加速支持信息
- 在API客户端中上报硬件加速配置和支持状态

util/system.py

@@ -8,10 +8,10 @@
 import os
 import platform
 import subprocess
-from typing import Optional
+from typing import Optional, Dict, Any
 
 import psutil
-from constant import SOFTWARE_VERSION, DEFAULT_CAPABILITIES
+from constant import SOFTWARE_VERSION, DEFAULT_CAPABILITIES, HW_ACCEL_NONE, HW_ACCEL_QSV, HW_ACCEL_CUDA
 
 
 def get_sys_info():
@@ -101,3 +101,166 @@ def get_ffmpeg_version() -> str:
         pass
 
     return 'unknown'
+
+
+def check_ffmpeg_encoder(encoder: str) -> bool:
+    """
+    检查 FFmpeg 是否支持指定的编码器
+
+    Args:
+        encoder: 编码器名称，如 'h264_nvenc', 'h264_qsv'
+
+    Returns:
+        bool: 是否支持该编码器
+    """
+    try:
+        result = subprocess.run(
+            ['ffmpeg', '-hide_banner', '-encoders'],
+            capture_output=True,
+            text=True,
+            timeout=5
+        )
+        if result.returncode == 0:
+            return encoder in result.stdout
+    except Exception:
+        pass
+
+    return False
+
+
+def check_ffmpeg_decoder(decoder: str) -> bool:
+    """
+    检查 FFmpeg 是否支持指定的解码器
+
+    Args:
+        decoder: 解码器名称，如 'h264_cuvid', 'h264_qsv'
+
+    Returns:
+        bool: 是否支持该解码器
+    """
+    try:
+        result = subprocess.run(
+            ['ffmpeg', '-hide_banner', '-decoders'],
+            capture_output=True,
+            text=True,
+            timeout=5
+        )
+        if result.returncode == 0:
+            return decoder in result.stdout
+    except Exception:
+        pass
+
+    return False
+
+
+def check_ffmpeg_hwaccel(hwaccel: str) -> bool:
+    """
+    检查 FFmpeg 是否支持指定的硬件加速方法
+
+    Args:
+        hwaccel: 硬件加速方法，如 'cuda', 'qsv', 'dxva2', 'd3d11va'
+
+    Returns:
+        bool: 是否支持该硬件加速方法
+    """
+    try:
+        result = subprocess.run(
+            ['ffmpeg', '-hide_banner', '-hwaccels'],
+            capture_output=True,
+            text=True,
+            timeout=5
+        )
+        if result.returncode == 0:
+            return hwaccel in result.stdout
+    except Exception:
+        pass
+
+    return False
+
+
+def detect_hw_accel_support() -> Dict[str, Any]:
+    """
+    检测系统的硬件加速支持情况
+
+    Returns:
+        dict: 硬件加速支持信息
+        {
+            'cuda': {
+                'available': bool,
+                'gpu': str or None,
+                'encoder': bool,  # h264_nvenc
+                'decoder': bool,  # h264_cuvid
+            },
+            'qsv': {
+                'available': bool,
+                'encoder': bool,  # h264_qsv
+                'decoder': bool,  # h264_qsv
+            },
+            'recommended': str  # 推荐的加速方式: 'cuda', 'qsv', 'none'
+        }
+    """
+    result = {
+        'cuda': {
+            'available': False,
+            'gpu': None,
+            'encoder': False,
+            'decoder': False,
+        },
+        'qsv': {
+            'available': False,
+            'encoder': False,
+            'decoder': False,
+        },
+        'recommended': HW_ACCEL_NONE
+    }
+
+    # 检测 CUDA/NVENC 支持
+    gpu_info = get_gpu_info()
+    if gpu_info:
+        result['cuda']['gpu'] = gpu_info
+        result['cuda']['available'] = check_ffmpeg_hwaccel('cuda')
+        result['cuda']['encoder'] = check_ffmpeg_encoder('h264_nvenc')
+        result['cuda']['decoder'] = check_ffmpeg_decoder('h264_cuvid')
+
+    # 检测 QSV 支持
+    result['qsv']['available'] = check_ffmpeg_hwaccel('qsv')
+    result['qsv']['encoder'] = check_ffmpeg_encoder('h264_qsv')
+    result['qsv']['decoder'] = check_ffmpeg_decoder('h264_qsv')
+
+    # 推荐硬件加速方式（优先 CUDA，其次 QSV）
+    if result['cuda']['available'] and result['cuda']['encoder']:
+        result['recommended'] = HW_ACCEL_CUDA
+    elif result['qsv']['available'] and result['qsv']['encoder']:
+        result['recommended'] = HW_ACCEL_QSV
+
+    return result
+
+
+def get_hw_accel_info_str() -> str:
+    """
+    获取硬件加速支持信息的可读字符串
+
+    Returns:
+        str: 硬件加速支持信息描述
+    """
+    support = detect_hw_accel_support()
+
+    parts = []
+
+    if support['cuda']['available']:
+        gpu = support['cuda']['gpu'] or 'Unknown GPU'
+        status = 'encoder+decoder' if support['cuda']['encoder'] and support['cuda']['decoder'] else (
+            'encoder only' if support['cuda']['encoder'] else 'decoder only' if support['cuda']['decoder'] else 'hwaccel only'
+        )
+        parts.append(f"CUDA({gpu}, {status})")
+
+    if support['qsv']['available']:
+        status = 'encoder+decoder' if support['qsv']['encoder'] and support['qsv']['decoder'] else (
+            'encoder only' if support['qsv']['encoder'] else 'decoder only' if support['qsv']['decoder'] else 'hwaccel only'
+        )
+        parts.append(f"QSV({status})")
+
+    if not parts:
+        return "No hardware acceleration available"
+
+    return ', '.join(parts) + f" [recommended: {support['recommended']}]"