You've already forked FrameTour-RenderWorker
42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
from typing import List
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from .base import EffectProcessor
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class TailEffect(EffectProcessor):
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"""保留末尾效果处理器"""
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def validate_params(self) -> bool:
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"""验证参数：保留的秒数"""
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if not self.params:
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return True # 默认不截取
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try:
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tail_seconds = float(self.params)
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return tail_seconds >= 0
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except ValueError:
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return False
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def generate_filter_args(self, video_input: str, effect_index: int) -> tuple[List[str], str]:
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"""生成保留末尾效果的滤镜参数"""
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if not self.validate_params():
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return [], video_input
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if not self.params:
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return [], video_input
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tail_seconds = float(self.params)
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if tail_seconds <= 0:
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return [], video_input
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output_stream = f"[v_eff{effect_index}]"
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# 使用reverse+trim+reverse的方法来精确获取最后N秒
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filter_args = [
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f"{video_input}reverse[v_rev{effect_index}]",
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f"[v_rev{effect_index}]trim=duration={tail_seconds}[v_trim{effect_index}]",
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f"[v_trim{effect_index}]reverse{output_stream}"
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]
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return filter_args, output_stream
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def get_effect_name(self) -> str:
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return "tail" |