我有一些 H.264 编解码器和 DTS 音频的视频文件。我的目标是将音轨（主要是 2 个音轨，英语和德语）转换为 AAC，但同时保留 DTS 音轨。
我尝试了这个命令，但它只转换曲目并用 AAC 替换 DTS 曲目。
$ ffmpeg -i input.mkv -map 0 -c:v copy -c:a libfdk_aac -b:a 128k \
-c:s mov_text -t 30 output.mp4
ffmpeg version git-2014-09-08-5a6dd92 Copyright (c) 2000-2014 the FFmpeg develop
ers
built on Sep 8 2014 18:19:34 with gcc 4.8.3 (GCC)
configuration: --prefix=/usr/local/x86_64-w64-mingw32 --cross-prefix=x86_64-w6
4-mingw32- --target-os=mingw32 --enable-w32threads --enable-memalign-hack --arch
=x86_64 --enable-runtime-cpudetect --disable-debug --enable-static --disable-sha
red --disable-ffplay --disable-ffserver --enable-gpl --enable-version3 --enable-
nonfree --enable-libmp3lame --enable-libfdk-aac --enable-libx264 --extra-cxxflag
s='-I/usr/local/x86_64-w64-mingw32/include -march=native' --extra-cflags='-march
=native' --extra-ldflags='-L/usr/local/x86_64-w64-mingw32/lib -march=native' --c
pu=native
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Input #0, matroska,webm, from 'input.mkv':
Metadata:
title : input
encoder : libebml v1.2.2 + libmatroska v1.3.0
creation_time : 2013-09-29 09:30:40
Duration: 01:34:11.94, start: 0.000000, bitrate: 12120 kb/s
Stream #0:0(ger): Video: h264 (High), yuv420p(tv, bt709), 1920x1080 [SAR 1:1
DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default) (forced)
Metadata:
title : input
Stream #0:1(ger): Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s (de
fault) (forced)
Stream #0:2(eng): Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s
Stream #0:3(ger): Subtitle: subrip (default) (forced)
Metadata:
title : Forced.Sub
File 'output.mp4' already exists. Overwrite ? [y/N] y
Output #0, mp4, to 'output.mp4':
Metadata:
title : output
encoder : Lavf56.4.101
Stream #0:0(ger): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [
SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 16k tbn, 1k tbc (default) (forced)
Metadata:
title : output
Stream #0:1(ger): Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 48000 Hz
, 5.1, s16, 128 kb/s (default) (forced)
Metadata:
encoder : Lavc56.1.100 libfdk_aac
Stream #0:2(eng): Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 48000 Hz
, 5.1, s16, 128 kb/s
Metadata:
encoder : Lavc56.1.100 libfdk_aac
Stream #0:3(ger): Subtitle: mov_text ([8][0][0][0] / 0x0008) (default) (forc
ed)
Metadata:
title : Forced.Sub
encoder : Lavc56.1.100 mov_text
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (dts (dca) -> aac (libfdk_aac))
Stream #0:2 -> #0:2 (dts (dca) -> aac (libfdk_aac))
Stream #0:3 -> #0:3 (subrip (native) -> mov_text (native))
Press [q] to stop, [?] for help
frame= 34 fps=0.0 q=-1.0 size= 0kB time=00:00:01.49 bitrate= 0.3kbits/
frame= 68 fps= 68 q=-1.0 size= 0kB time=00:00:02.81 bitrate= 0.1kbits/
frame= 98 fps= 65 q=-1.0 size= 0kB time=00:00:04.13 bitrate= 0.1kbits/
frame= 129 fps= 64 q=-1.0 size= 0kB time=00:00:05.50 bitrate= 0.1kbits/
frame= 160 fps= 64 q=-1.0 size= 0kB time=00:00:06.82 bitrate= 0.1kbits/
frame= 193 fps= 64 q=-1.0 size= 0kB time=00:00:08.10 bitrate= 0.0kbits/
frame= 225 fps= 64 q=-1.0 size= 0kB time=00:00:09.42 bitrate= 0.0kbits/
frame= 255 fps= 64 q=-1.0 size= 71kB time=00:00:10.73 bitrate= 54.3kbits/
frame= 282 fps= 63 q=-1.0 size= 245kB time=00:00:11.83 bitrate= 169.6kbits/
frame= 315 fps= 63 q=-1.0 size= 422kB time=00:00:13.20 bitrate= 261.9kbits/
frame= 348 fps= 63 q=-1.0 size= 519kB time=00:00:14.50 bitrate= 293.1kbits/
frame= 376 fps= 63 q=-1.0 size= 632kB time=00:00:15.80 bitrate= 327.4kbits/
frame= 398 fps= 61 q=-1.0 size= 722kB time=00:00:16.57 bitrate= 356.6kbits/
frame= 424 fps= 61 q=-1.0 size= 892kB time=00:00:17.77 bitrate= 411.4kbits/
frame= 456 fps= 61 q=-1.0 size= 1012kB time=00:00:19.11 bitrate= 433.8kbits/
frame= 486 fps= 61 q=-1.0 size= 1076kB time=00:00:20.35 bitrate= 433.1kbits/
frame= 518 fps= 61 q=-1.0 size= 1141kB time=00:00:21.58 bitrate= 433.0kbits/
frame= 542 fps= 60 q=-1.0 size= 1199kB time=00:00:22.65 bitrate= 433.4kbits/
frame= 570 fps= 60 q=-1.0 size= 1273kB time=00:00:23.76 bitrate= 439.0kbits/
frame= 598 fps= 60 q=-1.0 size= 1317kB time=00:00:25.00 bitrate= 431.5kbits/
frame= 630 fps= 60 q=-1.0 size= 1362kB time=00:00:26.28 bitrate= 424.6kbits/
frame= 659 fps= 60 q=-1.0 size= 3275kB time=00:00:27.58 bitrate= 972.7kbits/
frame= 691 fps= 60 q=-1.0 size= 4524kB time=00:00:28.82 bitrate=1285.9kbits/
frame= 722 fps= 60 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 58 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 56 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 53 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 52 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 50 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 48 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 47 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 45 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 44 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 42 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 41 q=-1.0 size= 5548kB time=00:00:29.98 bitrate=1515.5kbits/
frame= 722 fps= 40 q=-1.0 Lsize= 24270kB time=00:00:30.01 bitrate=6623.9kbits
/s
video:23278kB audio:942kB subtitle:0kB other streams:0kB global headers:0kB muxi
ng overhead: 0.208187%
我应该怎么做才能在输出文件中包含 DTS 和 AAC 音轨？