Question

我试图将音频剪辑添加到一起（使用amix），同时延迟其中一个（使用adelay）。我使用了以下命令

ffmpeg -i org/onclassical_demo_luisi_chopin_scherzo_2_31_small-version_ii-ending.wav \
-i org/all_u_had_2_say.wav -filter_complex \
"[1]adelay=1000[del1];[0][del1]amix" out.wav

并获得以下输出

ffmpeg version N-77387-g9d38f06 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  configuration: --enable-libmp3lame --enable-gpl --enable-libx264 --enable-libx265
  libavutil      55. 11.100 / 55. 11.100
  libavcodec     57. 18.100 / 57. 18.100
  libavformat    57. 20.100 / 57. 20.100
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6. 21.100 /  6. 21.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, wav, from 'org/onclassical_demo_luisi_chopin_scherzo_2_31_small-version_ii-ending.wav':
  Duration: 00:02:18.26, bitrate: 1411 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
Guessed Channel Layout for  Input Stream #1.0 : mono
Input #1, wav, from 'org/all_u_had_2_say.wav':
  Duration: 00:00:03.85, bitrate: 88 kb/s
    Stream #1:0: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 11025 Hz, 1 channels, u8, 88 kb/s
Output #0, wav, to 'out.wav':
  Metadata:
    ISFT            : Lavf57.20.100
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 11025 Hz, mono, s16, 176 kb/s (default)
    Metadata:
      encoder         : Lavc57.18.100 pcm_s16le
Stream mapping:
  Stream #0:0 (pcm_s16le) -> amix:input0
  Stream #1:0 (pcm_u8) -> adelay
  amix -> Stream #0:0 (pcm_s16le)
Press [q] to stop, [?] for help
Error while filtering: Cannot allocate memory
size=      83kB time=00:00:03.85 bitrate= 176.6kbits/s speed= 213x    
video:0kB audio:83kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.091808%

可能首先需要处理的流（pcm_s16le, 44100 Hz, 2 channels与pcm_u8, 11025 Hz, 1 channel）之间存在一些不兼容性，但仅运行amix的工作方式似乎并不真实是这样的。

Answer 1

尝试新版本。或者下面的命令与当前的命令：

ffmpeg -i org/onclassical_demo_luisi_chopin_scherzo_2_31_small-version_ii-ending.wav \
-i org/all_u_had_2_say.wav -filter_complex \
"[0]aresample=48000,aformat=fltp[a];  
[1]aresample=48000,aformat=fltp,asetpts=PTS+(1.000/TB)[del1]; \
[a][del1]amix" out.wav

＆＃34; AMIX＆＃34;和＆＃34; adelay＆＃34;组合导致＆＃34;过滤时出错：无法分配内存＆＃34;

1 个答案: