尝试组合视频和音轨时，FFMPEG 会产生无声视频
FFMPEG results in a silent video when trying to combine video and audio tracks
我正在使用以下命令合并视频和音频轨道。
ffmpeg -y -i /var/www/temp/merged.mp4 -i /var/www/temp/combined.mp3 -strict -2 /var/www/temp/videoExtouiulbjryzxlehjj2.mp4
编辑：
这是第一个命令的输出
ffmpeg version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/temp/merged.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.15.102
Duration: 00:02:31.80, start: 0.000000, bitrate: 2384 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 2381 kb/s, 25.43 fps, 29.97 tbr, 11988 tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 0 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #1, mp3, from '/var/www/temp/audioTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.94, start: 0.011995, bitrate: 128 kb/s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavf
[libx264 @ 0x1e903a0] using SAR=1/1
[libx264 @ 0x1e903a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
[libx264 @ 0x1e903a0] profile High, level 4.0
[libx264 @ 0x1e903a0] 264 - core 142 r2495 6a301b6 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/var/www/temp/videoExtvzxvphotsyfpcbkd.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.15.102
Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.13.100 libx264
Stream #0:1(und): Audio: mp3 (libmp3lame) (i[0][0][0] / 0x0069), 48000 Hz, stereo, fltp (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc56.13.100 libmp3lame
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
frame= 31 fps=0.0 q=0.0 size= 0kB time=00:00:01.05 bitrate= 0.4kbits/s dup=1 drop=0frame= 46 fps= 41 q=0.0 size= 0kB time=00:00:01.56 bitrate= 0.2kbits/s dup=1 drop=0frame= 52 fps= 32 q=29.0 size= 149kB time=00:00:01.75 bitrate= 698.4kbits/s dup=1 drop=frame= 64 fps= 28 q=29.0 size= 258kB time=00:00:02.16 bitrate= 977.2kbits/s dup=1 drop=frame= 74 fps= 26 q=29.0 size= 389kB
video:39673kB audio:211kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.143487%
[libx264 @ 0x1e903a0] frame I:27 Avg QP:18.78 size: 58834
[libx264 @ 0x1e903a0] frame P:2202 Avg QP:23.67 size: 14187
[libx264 @ 0x1e903a0] frame B:2323 Avg QP:25.75 size: 3356
[libx264 @ 0x1e903a0] consecutive B-frames: 24.7% 18.7% 9.0% 47.5%
[libx264 @ 0x1e903a0] mb I I16..4: 18.8% 74.7% 6.5%
[libx264 @ 0x1e903a0] mb P I16..4: 2.1% 5.0% 0.3% P16..4: 22.2% 6.0% 1.9% 0.0% 0.0% skip:62.5%
[libx264 @ 0x1e903a0] mb B I16..4: 0.1% 0.3% 0.0% B16..8: 19.9% 1.0% 0.1% direct: 0.3% skip:78.3% L0:42.3% L1:55.3% BI: 2.4%
[libx264 @ 0x1e903a0] 8x8 transform intra:68.2% inter:86.5%
[libx264 @ 0x1e903a0] coded y,uvDC,uvAC intra: 35.8% 52.3% 4.5% inter: 5.2% 7.4% 0.0%
[libx264 @ 0x1e903a0] i16 v,h,dc,p: 28% 23% 8% 40%
[libx264 @ 0x1e903a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 20% 22% 3% 6% 6% 7% 5% 4%
[libx264 @ 0x1e903a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 21% 14% 4% 8% 7% 7% 4% 3%
[libx264 @ 0x1e903a0] i8c dc,h,v,p: 56% 18% 20% 6%
[libx264 @ 0x1e903a0] Weighted P-Frames: Y:0.9% UV:0.2%
[libx264 @ 0x1e903a0] ref P L0: 73.4% 13.0% 10.0% 3.6% 0.0%
[libx264 @ 0x1e903a0] ref B L0: 92.2% 6.7% 1.1%
[libx264 @ 0x1e903a0] ref B L1: 96.6% 3.4%
[libx264 @ 0x1e903a0] kb/s:2139.74
结束编辑
我知道这应该有效，因为确切的行确实适用于其他文件。但是这些的结果是无声视频。
我检查了正在使用的音频文件，播放时似乎没有问题。但是我在创建它时确实收到了一个奇怪的警告。基本上我有 2 个音轨，一个是叠加音乐，另一个是说话。我使用此命令创建组合音频。
ffmpeg -y -i /var/www/temp/audioTrack.mp3 -i /var/www/temp/musicTrack.mp3 -filter_complex amerge -c:a libmp3lame -q:a 4 /var/www/temp/combined.mp3
这是第二个命令的输出。
ffmpeg version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mp3, from '/var/www/temp/audioTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.89, start: 0.025057, bitrate: 128 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc56.13
Input #1, mp3, from '/var/www/temp/musicTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.89, start: 0.025057, bitrate: 128 kb/s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc56.13
[Parsed_amerge_0 @ 0x15e3760] No channel layout for input 1
[Parsed_amerge_0 @ 0x15e3760] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
Output #0, mp3, to '/var/www/temp/combined.mp3':
Metadata:
TSSE : Lavf56.15.102
Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s16p (default)
Metadata:
encoder : Lavc56.13.100 libmp3lame
Stream mapping:
Stream #0:0 (mp3) -> amerge:in0
Stream #1:0 (mp3) -> amerge:in1
amerge -> Stream #0:0 (libmp3lame)
Press [q] to stop, [?] for help
[libmp3lame @ 0x1601000] Trying to remove 1152 samples, but the queue is empty
size= 2001kB time=00:02:08.88 bitrate= 127.2kbits/s
video:0kB audio:2001kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.012350%
值得注意的是这些部分（我相信）。
[Parsed_amerge_0 @ 0x15e3760] No channel layout for input 1
[Parsed_amerge_0 @ 0x15e3760] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
和
[libmp3lame @ 0x1601000] Trying to remove 1152 samples, but the queue is empty
正如我所说，输出音频文件听起来是正确的。
音乐和音轨是使用来自 pydub 库的 python 中的 AudioSegment 创建的。我以前用过这个没有问题。其代码如下。
sound = AudioSegment.from_mp3(audio)
introSilence = AudioSegment.silent(duration=introLength)
creditsSilence = AudioSegment.silent(duration=creditsLength)
increasedAudio = sound + 12
talking = introSilence + increasedAudio + creditsSilence
talking.export(audioTrack, format="mp3")
mus = AudioSegment.from_mp3(music)
introMusic = mus[ : introLength]
videoMusic = mus[introLength - crossFade : introLength + videoLength + crossFade]
creditsMusic = mus[totalLength - creditsLength : totalLength]
lowerMusic = videoMusic - 6
totalMusic = introMusic.append(lowerMusic, crossfade=crossFade).append(creditsMusic, crossfade=crossFade).fade_out(fadeOut)
totalMusic.export(musicTrack, format="mp3")
这是 ffprobe 在 2 个音频文件上的输出。
用于音轨
ffprobe version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2007-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mp3, from 'temp/audioTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.89, start: 0.025057, bitrate: 128 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc56.13
和 musicTrack
ffprobe version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2007-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mp3, from 'temp/musicTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.89, start: 0.025057, bitrate: 128 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc56.13
我看不出这些有任何问题。
为了完整起见，这里是组合音轨的 ffprobe 结果。
ffprobe version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2007-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mp3, from 'temp/combined.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.91, start: 0.025057, bitrate: 127 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 127 kb/s
Metadata:
encoder : Lavc56.13
如有任何帮助，我们将不胜感激。
谢谢，
斯图
您没有将第二个文件的任何流映射到输出。如果您查看流映射：
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
您可以看到只有来自输入文件 0 的流被映射到输出。您需要明确映射第二个文件的音频流：
ffmpeg -y -i merged.mp4 -i combined.mp3 -c:a aac -map 0:v -map 1:a output.mp4
请注意，最近的 ffmpeg 版本不需要 -strict -2。
我正在使用以下命令合并视频和音频轨道。
ffmpeg -y -i /var/www/temp/merged.mp4 -i /var/www/temp/combined.mp3 -strict -2 /var/www/temp/videoExtouiulbjryzxlehjj2.mp4
编辑：
这是第一个命令的输出
ffmpeg version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/temp/merged.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.15.102
Duration: 00:02:31.80, start: 0.000000, bitrate: 2384 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 2381 kb/s, 25.43 fps, 29.97 tbr, 11988 tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 0 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #1, mp3, from '/var/www/temp/audioTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.94, start: 0.011995, bitrate: 128 kb/s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavf
[libx264 @ 0x1e903a0] using SAR=1/1
[libx264 @ 0x1e903a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
[libx264 @ 0x1e903a0] profile High, level 4.0
[libx264 @ 0x1e903a0] 264 - core 142 r2495 6a301b6 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/var/www/temp/videoExtvzxvphotsyfpcbkd.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.15.102
Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.13.100 libx264
Stream #0:1(und): Audio: mp3 (libmp3lame) (i[0][0][0] / 0x0069), 48000 Hz, stereo, fltp (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc56.13.100 libmp3lame
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
frame= 31 fps=0.0 q=0.0 size= 0kB time=00:00:01.05 bitrate= 0.4kbits/s dup=1 drop=0frame= 46 fps= 41 q=0.0 size= 0kB time=00:00:01.56 bitrate= 0.2kbits/s dup=1 drop=0frame= 52 fps= 32 q=29.0 size= 149kB time=00:00:01.75 bitrate= 698.4kbits/s dup=1 drop=frame= 64 fps= 28 q=29.0 size= 258kB time=00:00:02.16 bitrate= 977.2kbits/s dup=1 drop=frame= 74 fps= 26 q=29.0 size= 389kB
video:39673kB audio:211kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.143487%
[libx264 @ 0x1e903a0] frame I:27 Avg QP:18.78 size: 58834
[libx264 @ 0x1e903a0] frame P:2202 Avg QP:23.67 size: 14187
[libx264 @ 0x1e903a0] frame B:2323 Avg QP:25.75 size: 3356
[libx264 @ 0x1e903a0] consecutive B-frames: 24.7% 18.7% 9.0% 47.5%
[libx264 @ 0x1e903a0] mb I I16..4: 18.8% 74.7% 6.5%
[libx264 @ 0x1e903a0] mb P I16..4: 2.1% 5.0% 0.3% P16..4: 22.2% 6.0% 1.9% 0.0% 0.0% skip:62.5%
[libx264 @ 0x1e903a0] mb B I16..4: 0.1% 0.3% 0.0% B16..8: 19.9% 1.0% 0.1% direct: 0.3% skip:78.3% L0:42.3% L1:55.3% BI: 2.4%
[libx264 @ 0x1e903a0] 8x8 transform intra:68.2% inter:86.5%
[libx264 @ 0x1e903a0] coded y,uvDC,uvAC intra: 35.8% 52.3% 4.5% inter: 5.2% 7.4% 0.0%
[libx264 @ 0x1e903a0] i16 v,h,dc,p: 28% 23% 8% 40%
[libx264 @ 0x1e903a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 20% 22% 3% 6% 6% 7% 5% 4%
[libx264 @ 0x1e903a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 21% 14% 4% 8% 7% 7% 4% 3%
[libx264 @ 0x1e903a0] i8c dc,h,v,p: 56% 18% 20% 6%
[libx264 @ 0x1e903a0] Weighted P-Frames: Y:0.9% UV:0.2%
[libx264 @ 0x1e903a0] ref P L0: 73.4% 13.0% 10.0% 3.6% 0.0%
[libx264 @ 0x1e903a0] ref B L0: 92.2% 6.7% 1.1%
[libx264 @ 0x1e903a0] ref B L1: 96.6% 3.4%
[libx264 @ 0x1e903a0] kb/s:2139.74
结束编辑
我知道这应该有效，因为确切的行确实适用于其他文件。但是这些的结果是无声视频。
我检查了正在使用的音频文件，播放时似乎没有问题。但是我在创建它时确实收到了一个奇怪的警告。基本上我有 2 个音轨，一个是叠加音乐，另一个是说话。我使用此命令创建组合音频。
ffmpeg -y -i /var/www/temp/audioTrack.mp3 -i /var/www/temp/musicTrack.mp3 -filter_complex amerge -c:a libmp3lame -q:a 4 /var/www/temp/combined.mp3
这是第二个命令的输出。
ffmpeg version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mp3, from '/var/www/temp/audioTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.89, start: 0.025057, bitrate: 128 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc56.13
Input #1, mp3, from '/var/www/temp/musicTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.89, start: 0.025057, bitrate: 128 kb/s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc56.13
[Parsed_amerge_0 @ 0x15e3760] No channel layout for input 1
[Parsed_amerge_0 @ 0x15e3760] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
Output #0, mp3, to '/var/www/temp/combined.mp3':
Metadata:
TSSE : Lavf56.15.102
Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s16p (default)
Metadata:
encoder : Lavc56.13.100 libmp3lame
Stream mapping:
Stream #0:0 (mp3) -> amerge:in0
Stream #1:0 (mp3) -> amerge:in1
amerge -> Stream #0:0 (libmp3lame)
Press [q] to stop, [?] for help
[libmp3lame @ 0x1601000] Trying to remove 1152 samples, but the queue is empty
size= 2001kB time=00:02:08.88 bitrate= 127.2kbits/s
video:0kB audio:2001kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.012350%
值得注意的是这些部分（我相信）。
[Parsed_amerge_0 @ 0x15e3760] No channel layout for input 1
[Parsed_amerge_0 @ 0x15e3760] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
和
[libmp3lame @ 0x1601000] Trying to remove 1152 samples, but the queue is empty
正如我所说，输出音频文件听起来是正确的。
音乐和音轨是使用来自 pydub 库的 python 中的 AudioSegment 创建的。我以前用过这个没有问题。其代码如下。
sound = AudioSegment.from_mp3(audio)
introSilence = AudioSegment.silent(duration=introLength)
creditsSilence = AudioSegment.silent(duration=creditsLength)
increasedAudio = sound + 12
talking = introSilence + increasedAudio + creditsSilence
talking.export(audioTrack, format="mp3")
mus = AudioSegment.from_mp3(music)
introMusic = mus[ : introLength]
videoMusic = mus[introLength - crossFade : introLength + videoLength + crossFade]
creditsMusic = mus[totalLength - creditsLength : totalLength]
lowerMusic = videoMusic - 6
totalMusic = introMusic.append(lowerMusic, crossfade=crossFade).append(creditsMusic, crossfade=crossFade).fade_out(fadeOut)
totalMusic.export(musicTrack, format="mp3")
这是 ffprobe 在 2 个音频文件上的输出。
用于音轨
ffprobe version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2007-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mp3, from 'temp/audioTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.89, start: 0.025057, bitrate: 128 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc56.13
和 musicTrack
ffprobe version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2007-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mp3, from 'temp/musicTrack.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.89, start: 0.025057, bitrate: 128 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc56.13
我看不出这些有任何问题。
为了完整起见，这里是组合音轨的 ffprobe 结果。
ffprobe version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2007-2016 the FFmpeg developers
built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mp3, from 'temp/combined.mp3':
Metadata:
encoder : Lavf56.15.102
Duration: 00:02:08.91, start: 0.025057, bitrate: 127 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 127 kb/s
Metadata:
encoder : Lavc56.13
如有任何帮助，我们将不胜感激。
谢谢，
斯图
您没有将第二个文件的任何流映射到输出。如果您查看流映射：
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
您可以看到只有来自输入文件 0 的流被映射到输出。您需要明确映射第二个文件的音频流：
ffmpeg -y -i merged.mp4 -i combined.mp3 -c:a aac -map 0:v -map 1:a output.mp4
请注意，最近的 ffmpeg 版本不需要 -strict -2。