将音频混合到视频会创建静音视频
这是我正在使用的命令
"-y","-i",j,"-filter_complex","amovie="+audio+":loop=999,asetpts=N/SR/TB,atrim=0:18,adelay=50000|50000,aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume=1.5[a1];[0:a]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume=2.0[a2];[a1][a2]amerge,pan=stereo:c0<c0+c2:c1<c1+c3[out]","-map","0:v","-map","[out]","-c:v","copy","-c:a","aac","-preset", "ultrafast", out
我有一段2分7秒钟的视频,我希望将音频“混合”到从50秒到68秒的部分
我想要的是保持视频中的原始声音并将音频混合到现有的视频声音(不是过度写入),(保留旧的视频声音和视频中的新音频)
发生了什么事情,直到50秒视频有自己的声音,从50-68音频结束写入视频声音从那时到最后它是沉默的我想要的是视频通过视频发出声音并将音频混合50-68秒
这张图片可以解释我想要的东西和我得到的东西
我想要什么 我得到了什么 我面临的另一个问题是 如果我在一个静音视频上尝试这个(完全没有声音的视频)这个代码失败这就是我得到的错误
ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/sdcard0/abcd/Videos/20180325_164206.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2018-03-25 16:44:15
Duration: 00:02:05.21, start: 0.000000, bitrate: 1585 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x1280, 1584 kb/s, SAR 1:1 DAR 9:16, 11.83 fps, 90k tbr, 90k tbn, 180k tbc (default)
Metadata:
creation_time : 2018-03-25 16:44:15
handler_name : VideoHandle
[mp3 @ 0xaca26b40] Skipping 0 bytes of junk at 417.
[Parsed_pan_9 @ 0xac9b17e0] This syntax is deprecated. Use '|' to separate the list items.
Stream specifier ':a' in filtergraph description amovie=/storage/sdcard0/abcd/Videos/baby.mp3:loop=999,asetpts=N/SR/TB,atrim=0:18,adelay=50000|50000,aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume=1.5[a1];[0:a]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume=2.0[a2]; [a1][a2]amerge,pan=stereo:c0<c0+c2:c1<c1+c3[out] matches no streams.
我们如何将音频添加到无声视频