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如何将多个音频流与嵌入音频的视频混合?例如,我有嵌入音频流的 video.mp4。我想将一个或多个音频流与它混合,保留原始嵌入的音频流。我该怎么做?谢谢。
基本模板是
ffmpeg -i video.mp4 -i audio1.mp3 -i audio2.mp3 -filter_complex "[0][1][2]amix=3[a]" -map 0:v -map "[a]" -c:v copy out.mp4