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48 lines
1.8 KiB
Python
48 lines
1.8 KiB
Python
from app.services.documentary.frame_analysis_models import FrameBatchResult
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class DocumentaryFrameAnalysisService:
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PROMPT_TEMPLATE = """
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我提供了 {frame_count} 张视频帧,它们按时间顺序排列,代表一个连续的视频片段。
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首先,请详细描述每一帧的关键视觉信息(包含:主要内容、人物、动作和场景)。
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然后,基于所有帧的分析,请用简洁的语言总结整个视频片段中发生的主要活动或事件流程。
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请务必使用 JSON 格式输出。
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JSON 必须包含以下键:
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- frame_observations: 数组,且长度必须为 {frame_count}
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- overall_activity_summary: 字符串,描述整个批次主要活动
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示例结构:
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{{
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"frame_observations": [
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{{"timestamp": "00:00:00,000", "observation": "画面描述"}}
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],
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"overall_activity_summary": "本批次主要活动总结"
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}}
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请务必不要遗漏视频帧,我提供了 {frame_count} 张视频帧,frame_observations 必须包含 {frame_count} 个元素
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""".strip()
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def _build_analysis_prompt(self, frame_count: int) -> str:
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return self.PROMPT_TEMPLATE.format(frame_count=frame_count)
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def _build_failed_batch_result(
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self,
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*,
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batch_index: int,
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raw_response: str,
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error_message: str,
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frame_paths: list[str],
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time_range: str,
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) -> FrameBatchResult:
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fallback_summary = (raw_response or "").strip()[:200]
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if not fallback_summary:
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fallback_summary = f"Batch {batch_index} analysis failed: {error_message or 'unknown error'}"
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return FrameBatchResult(
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batch_index=batch_index,
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status="failed",
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time_range=time_range,
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raw_response=raw_response,
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frame_paths=list(frame_paths),
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fallback_summary=fallback_summary,
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error_message=error_message,
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)
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