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将Beyond1.mp3 ，Beyond2.mp3这两个文件混合成一个文件： iok.aac ffmpeg -i Beyond1.mp3 -i Beyond2.mp3 -filter_complex amix=inputs=2:duration=first:dropout_transition=2 -strict -2 iok.aac 本来要将混合后的文件也设为MP3格式，但是ffmpeg只有MP3的解码器，没有编码器。 当选择MP3格式输出时会出错。 =========================================================================== 运行命令时的打印 tanxiaohai@tanxiaohai-virtual-machine:~/share/ffmpeg-2.6.2$ ffmpeg -i Beyond1.mp3 -i Beyond2.mp3 -filter_complex amix=inputs=2:duration=first:dropout_transition=2 -strict -2 iok.aac ffmpeg version 2.6.2 Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) configuration: libavutil 54. 20.100 / 54. 20.100 libavcodec 56. 26.100 / 56. 26.100 libavformat 56. 25.101 / 56. 25.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 11.102 / 5. 11.102 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 [mp3 @ 0xab9a1a0] Estimating duration from bitrate, this may be inaccurate Input #0, mp3, from 'Beyond1.mp3': Metadata: album : ò?à?μ?ì?MusicPalace artist : Beyond￡¨???ò??￡? Duration: 00:05:21.77, start: 0.000000, bitrate: 128 kb/s Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Input #1, mp3, from 'Beyond2.mp3': Metadata: album : 25?ü?ê???? artist : BEYOND title : à?óêò1 Duration: 00:04:20.73, start: 0.025056, bitrate: 128 kb/s Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Metadata: encoder : LAME3.97 Stream #1:1: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 150x150 [SAR 100:100 DAR 1:1], 90k tbr, 90k tbn, 90k tbc Metadata: title : comment : Cover (front) Output #0, adts, to 'iok.aac': Metadata: album : ò?à?μ?ì?MusicPalace artist : Beyond￡¨???ò??￡? encoder : Lavf56.25.101 Stream #0:0: Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s (default) Metadata: encoder : Lavc56.26.100 aac Stream mapping: Stream #0:0 (mp3) -> amix:input0 Stream #1:0 (mp3) -> amix:input1 amix -> Stream #0:0 (aac) Press [q] to stop, [?] for help [mp3 @ 0xabb0140] Header missing bitrate= 130.7kbits/s Error while decoding stream #1:0: Invalid data found when processing input [mp3 @ 0xab9bde0] incomplete frameitrate= 130.7kbits/s Error while decoding stream #0:0: Invalid data found when processing input size= 5143kB time=00:05:22.50 bitrate= 130.6kbits/s video:0kB audio:5048kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.880916% tanxiaohai@tanxiaohai-virtual-machine:~/share/ffmpeg-2.6.2$ |
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