【发布时间】：2018-08-06 01:43:59
【问题描述】：
我运行以下命令来创建动画幻灯片，但出现错误
String path = Environment.getExternalStorageDirectory() + "/";
-framerate 60 -loop 1 -t 1 -i "+path+"images_001.jpg -framerate 60 -loop 1 -t 1 -i "+path+"images_002.jpg -framerate 60 -loop 1 -t 1 -i "+path+"images_003.jpg -framerate 60 -loop 1 -t 1 -i "+path+"images_004.jpg -framerate 60 -loop 1 -t 1 -i "+path+"images_005.jpg -filter_complex [1:v][0:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b1v]; [2:v][1:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b2v]; [3:v][2:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b3v]; [4:v][3:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b4v]; [0:v][b1v][1:v][b2v][2:v][b3v][3:v][b4v][4:v]concat=n=9:v=1:a=0;format=yuv420p;scale=480:270[vx] -map [vx] -vsync 0 -c:v libx264 -crf 35 "+path+"preview_270p.mp4
输出：
FAILED with output : 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
[mjpeg @ 0xb86fe040] Changing bps to 8
Input #0, image2, from '/storage/emulated/0/images_001.jpg':
Duration: 00:00:00.02, start: 0.000000, bitrate: 542987 kb/s
Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1440x2560, 60 fps, 60 tbr, 60 tbn, 60 tbc
[mjpeg @ 0xb8708360] Changing bps to 8
Input #1, image2, from '/storage/emulated/0/images_002.jpg':
Duration: 00:00:00.02, start: 0.000000, bitrate: 1011478 kb/s
Stream #1:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 2340x4160, 60 fps, 60 tbr, 60 tbn, 60 tbc
[mjpeg @ 0xb870de00] Changing bps to 8
Input #2, image2, from '/storage/emulated/0/images_003.jpg':
Duration: 00:00:00.02, start: 0.000000, bitrate: 1022909 kb/s
Stream #2:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 2340x4160, 60 fps, 60 tbr, 60 tbn, 60 tbc
[mjpeg @ 0xb870a170] Changing bps to 8
Input #3, image2, from '/storage/emulated/0/images_004.jpg':
Duration: 00:00:00.02, start: 0.000000, bitrate: 601309 kb/s
Stream #3:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1440x2560, 60 fps, 60 tbr, 60 tbn, 60 tbc
[mjpeg @ 0xb86ff290] Changing bps to 8
Input #4, image2, from '/storage/emulated/0/images_005.jpg':
Duration: 00:00:00.02, start: 0.000000, bitrate: 950450 kb/s
Stream #4:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 2340x4160, 60 fps, 60 tbr, 60 tbn, 60 tbc
[AVFilterGraph @ 0xb8708bc0] No such filter: ''
Error initializing complex filters.
Invalid argument
【问题讨论】：
-
用双引号将整个 filter_complex 括起来。
-
我也用双引号括起来但同样的错误。我在android平台上运行。
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添加引号时是否转义？
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是的，我逃脱了它。没有转义双引号，我无法编译代码。
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我也是。即使我使用 " 或 ' 你让它工作了吗？