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This document describes filters, sources, and sinks provided by the libavfilter library. Filtergraph Syntax Filters in the same linear chain are separ 阅读全文
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SciTech-AV-Audio-DAP(Digital Audio Processing)-Loudness Normalization(响度规范化): Perceived Loudness + RMS (Root Mean Square) Digital Audio Processing:数字音 阅读全文
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EBU: European Broadcasting Union Loudness Normalization Use the Loudness Normalization to change the level of the audio (normally reduce it to recomme 阅读全文
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Perceived Loudness (EBU R 128) EBU: European Broadcasting Union Example of Implementation(Source Code): https://github.com/jiixyj/libebur128 The speci 阅读全文
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SciTech-AV-Audio-DAP(Digital Audio Processing) Effect(音效)-EQ(Equalization均衡) and Filters(滤波)-FCEQ(Filter Curve Equalization):滤波曲线均衡 Abbreviations FFT 阅读全文
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IxDF: https://www.interaction-design.org/literature/topics/color-theory Color Theory What is Color Theory? Color theory is the study of how colors wor 阅读全文
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FFmpeg Image/Video/Audio Processing 按帧截图， 图片合成视频， 视频格式转换， 视频拼接： video_file = 'Cartier.flv' cmd_probe = "ffprobe -hide_banner -v quiet -print_format js 阅读全文
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AMR录音文件的剪切和格式转换 剪切+格式转换: ffmpeg -i evidence.amr -ss 01:10 -to 04:10 -f mp3 sample.mp3 ffmpeg -i x.mp3 -ss 01:14 -to 01:27 -f mp3 sample.mp3 FFmpeg音频 格 阅读全文
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1.查询网址： https://inv-veri.chinatax.gov.cn/ 发票代码：旧版发票上有发票代码，一并输入。 普票，只需要输入 发票号码 开票日期 价税合计(发票上的价税合计金额) 验证码 增值税专用发票， 同上 图示: 阅读全文
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Example of Application: https://www.interaction-design.org Course: “Emotional Design — How to Make Products People Will Love” Putting Some Emotion int 阅读全文