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用fop转换视频'avthumb/mp4/ab/128k/ar/44100/acodec/libfaac/r/30/vb/3196k/vcodec/libx264/autoscale/1/stripmeta/0'成功后，转换的视频经常打不开，报告：
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Can you provide your video? I'll test it first and locate the problem. If it’s inconvenient, you can submit a work order to Qiniu and someone will reply to you