这里输入的是两个视频总共 40 秒，我将其连接并加速 4 倍，那么视频持续时间为 10 秒，
音频输入持续时间是动态的，它会比视频短或比视频持续时间长，这就是为什么我使用 amovie 命令将音频替换为无限循环，并在最后添加 -shortest 命令。
but it won't be worked. it goes to infinite process.
这是我的命令
[-y,
-i, /storage/emulated/0/Received/VID-20190407-WA0001.mp4,
-i, /storage/emulated/0/Received/MP4_20190220_114210.mp4,
-strict, experimental,
-filter_complex, [0:v]scale=iw*min(480/iw\,480/ih):ih*min(480/iw\,480/ih), pad=480:480:(480-iw*min(480/iw\,480/ih))/2:(480-ih*min(480/iw\,480/ih))/2,setsar=1:1[v0];
[1:v]scale=iw*min(480/iw\,480/ih):ih*min(480/iw\,480/ih), pad=480:480:(480-iw*min(480/iw\,480/ih))/2:(480-ih*min(480/iw\,480/ih))/2,setsar=1:1[v1];
[v0][v1] concat=n=2:v=1[vTemp];[vTemp]setpts=0.25*PTS[finalv];
amovie=/storage/emulated/0/VideoEditor/.caches/Video_editor_1560762451434.mp3:loop=0,asetpts=N/SR/TB[aaa],
-map, [finalv], -map, [aaa],
-shortest, -preset, ultrafast,
/storage/emulated/0/Video_1560762463583.mp4]
这是过程的日志(日志会无限大，但我添加到 stackoverflow 限制)
06-17 17:14:58.408 E: onProgress: ffmpeg version n4.0-39-gda39990 Copyright (c) 2000-2018 the FFmpeg developers
06-17 17:14:58.408 E: onProgress: built with gcc 4.9.x (GCC) 20150123 (prerelease)
06-17 17:14:58.408 E: onProgress: configuration: --target-os=linux --cross-prefix=/root/bravobit/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/root/bravobit/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-ffprobe --enable-libopus --enable-libvorbis --enable-libfdk-aac --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-libvpx --enable-libass --enable-yasm --enable-pthreads --disable-debug --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-linux-perf --disable-doc --disable-shared --enable-static --enable-runtime-cpudetect --enable-nonfree --enable-network --enable-avresample --enable-avformat --enable-avcodec --enable-indev=lavfi --enable-hwaccels --enable-ffmpeg --enable-zlib --enable-gpl --enable-small --enable-nonfree --pkg-config=pkg-config --pkg-config-flags=--static --prefix=/root/bravobit/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/root/bravobit/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/root/bravobit/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-cxxflags=
06-17 17:14:58.408 E: onProgress: libavutil 56. 14.100 / 56. 14.100
06-17 17:14:58.409 E: onProgress: libavcodec 58. 18.100 / 58. 18.100
06-17 17:14:58.409 E: onProgress: libavformat 58. 12.100 / 58. 12.100
06-17 17:14:58.409 E: onProgress: libavdevice 58. 3.100 / 58. 3.100
06-17 17:14:58.409 E: onProgress: libavfilter 7. 16.100 / 7. 16.100
06-17 17:14:58.409 E: onProgress: libavresample 4. 0. 0 / 4. 0. 0
06-17 17:14:58.409 E: onProgress: libswscale 5. 1.100 / 5. 1.100
06-17 17:14:58.409 E: onProgress: libswresample 3. 1.100 / 3. 1.100
06-17 17:14:58.409 E: onProgress: libpostproc 55. 1.100 / 55. 1.100
06-17 17:14:58.472 E: getSlotFromBufferLocked: unknown buffer: 0x97c4b740
06-17 17:14:58.563 E: onProgress: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Received/VID-20190407-WA0001.mp4':
06-17 17:14:58.563 E: onProgress: Metadata:
06-17 17:14:58.563 E: onProgress: major_brand : isom
06-17 17:14:58.564 E: onProgress: minor_version : 512
06-17 17:14:58.564 E: onProgress: compatible_brands: isomiso2avc1mp41
06-17 17:14:58.564 E: onProgress: encoder : Lavf57.76.100
06-17 17:14:58.565 E: onProgress: comment : vid:v0701dd10000bi84903a28j16o847fp0
06-17 17:14:58.565 E: onProgress: Duration: 00:00:17.35, start: 0.000000, bitrate: 468 kb/s
06-17 17:14:58.566 E: onProgress: Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 480x854, 362 kb/s, 25.08 fps, 25.08 tbr, 90k tbn, 50.20 tbc (default)
06-17 17:14:58.566 E: onProgress: Metadata:
06-17 17:14:58.567 E: onProgress: handler_name : VideoHandler
06-17 17:14:58.567 E: onProgress: Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
06-17 17:14:58.569 E: onProgress: Metadata:
06-17 17:14:58.569 E: onProgress: handler_name : SoundHandler
06-17 17:14:58.654 E: onProgress: Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Received/MP4_20190220_114210.mp4':
06-17 17:14:58.654 E: onProgress: Metadata:
06-17 17:14:58.655 E: onProgress: major_brand : iso6
06-17 17:14:58.655 E: onProgress: minor_version : 1
06-17 17:14:58.655 E: onProgress: compatible_brands: mp42iso6avc1isom
06-17 17:14:58.655 E: onProgress: creation_time : 2019-02-20T06:12:15.000000Z
06-17 17:14:58.656 E: onProgress: Duration: 00:00:23.46, start: 0.000000, bitrate: 309 kb/s
06-17 17:14:58.656 E: onProgress: Stream #1:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 426x426, 243 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
06-17 17:14:58.656 E: onProgress: Stream #1:1(eng): Audio: aac (mp4a / 0x6134706D), 32000 Hz, stereo, fltp, 64 kb/s (default)
06-17 17:14:58.687 E: onProgress: Stream mapping:
06-17 17:14:58.687 E: onProgress: Stream #0:0 (h264) -> scale
06-17 17:14:58.687 E: onProgress: Stream #1:0 (h264) -> scale
06-17 17:14:58.687 E: onProgress: setpts -> Stream #0:0 (libx264)
06-17 17:14:58.687 E: onProgress: asetpts -> Stream #0:1 (aac)
06-17 17:14:58.688 E: onProgress: Press [q] to stop, [?] for help
06-17 17:14:58.828 E: onProgress: [libx264 @ 0xb53de280] using SAR=1/1
06-17 17:14:58.851 E: onProgress: [libx264 @ 0xb53de280] using cpu capabilities: ARMv6 NEON
06-17 17:14:58.865 E: onProgress: [libx264 @ 0xb53de280] profile Constrained Baseline, level 3.0
06-17 17:14:58.865 E: onProgress: [libx264 @ 0xb53de280] 264 - core 152 r2851M ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
06-17 17:14:58.899 E: onProgress: Output #0, mp4, to '/storage/emulated/0/VideoEditor/Video_editor_1560771898152.mp4':
06-17 17:14:58.900 E: onProgress: Metadata:
06-17 17:14:58.900 E: onProgress: major_brand : isom
06-17 17:14:58.900 E: onProgress: minor_version : 512
06-17 17:14:58.900 E: onProgress: compatible_brands: isomiso2avc1mp41
06-17 17:14:58.900 E: onProgress: comment : vid:v0701dd10000bi84903a28j16o847fp0
06-17 17:14:58.900 E: onProgress: encoder : Lavf58.12.100
06-17 17:14:58.900 E: onProgress: Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 480x480 [SAR 1:1 DAR 1:1], q=-1--1, 25.08 fps, 19264 tbn, 25.08 tbc (default)
06-17 17:14:58.901 E: onProgress: Metadata:
06-17 17:14:58.901 E: onProgress: encoder : Lavc58.18.100 libx264
06-17 17:14:58.901 E: onProgress: Side data:
06-17 17:14:58.902 E: onProgress: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
06-17 17:14:58.902 E: onProgress: Stream #0:1: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
06-17 17:14:58.903 E: onProgress: Metadata:
06-17 17:14:58.903 E: onProgress: encoder : Lavc58.18.100 aac
06-17 17:14:58.905 E: onProgress: [mp3float @ 0xb386d400] Could not update timestamps for skipped samples.
06-17 17:14:59.242 E: onProgress: frame= 5 fps=0.0 q=0.0 size= 0kB time=00:00:00.09 bitrate= 4.1kbits/s dup=0 drop=3 speed=0.183x
06-17 17:14:59.727 E: onProgress: frame= 11 fps= 11 q=23.0 size= 0kB time=00:00:00.30 bitrate= 1.3kbits/s dup=0 drop=20 speed=0.294x
06-17 17:15:00.240 E: onProgress: frame= 16 fps= 10 q=23.0 size= 0kB time=00:00:00.53 bitrate= 0.7kbits/s dup=0 drop=36 speed=0.349x
06-17 17:15:00.764 E: onProgress: frame= 22 fps= 11 q=23.0 size= 0kB time=00:00:00.78 bitrate= 0.5kbits/s dup=0 drop=54 speed=0.382x
06-17 17:15:01.264 E: onProgress: frame= 28 fps= 11 q=20.0 size= 0kB time=00:00:00.99 bitrate= 0.4kbits/s dup=0 drop=73 speed=0.389x
06-17 17:15:01.779 E: onProgress: frame= 34 fps= 11 q=24.0 size= 0kB time=00:00:01.25 bitrate= 0.3kbits/s dup=0 drop=90 speed=0.409x
06-17 17:15:02.277 E: onProgress: frame= 40 fps= 11 q=25.0 size= 0kB time=00:00:01.46 bitrate= 0.3kbits/s dup=0 drop=108 speed=0.409x
06-17 17:15:02.799 E: onProgress: frame= 46 fps= 11 q=24.0 size= 256kB time=00:00:01.71 bitrate=1220.7kbits/s dup=0 drop=125 speed=0.42x
06-17 17:15:03.303 E: onProgress: frame= 52 fps= 11 q=24.0 size= 256kB time=00:00:01.95 bitrate=1075.4kbits/s dup=0 drop=143 speed=0.424x
06-17 17:15:03.807 E: onProgress: frame= 58 fps= 11 q=22.0 size= 256kB time=00:00:02.18 bitrate= 961.0kbits/s dup=0 drop=161 speed=0.427x
06-17 17:15:04.316 E: onProgress: frame= 64 fps= 11 q=23.0 size= 256kB time=00:00:02.41 bitrate= 868.6kbits/s dup=0 drop=179 speed=0.43x
06-17 17:15:04.824 E: onProgress: frame= 69 fps= 11 q=22.0 size= 256kB time=00:00:02.67 bitrate= 785.5kbits/s dup=0 drop=196 speed=0.436x
06-17 17:15:05.338 E: onProgress: frame= 76 fps= 11 q=25.0 size= 256kB time=00:00:02.90 bitrate= 722.7kbits/s dup=0 drop=215 speed=0.438x
06-17 17:15:05.838 E: onProgress: frame= 82 fps= 11 q=23.0 size= 256kB time=00:00:03.13 bitrate= 669.1kbits/s dup=0 drop=233 speed=0.439x
06-17 17:15:06.354 E: onProgress: frame= 88 fps= 11 q=21.0 size= 512kB time=00:00:03.36 bitrate=1245.9kbits/s dup=0 drop=251 speed=0.44x
06-17 17:15:06.885 E: onProgress: frame= 94 fps= 12 q=17.0 size= 512kB time=00:00:03.62 bitrate=1158.0kbits/s dup=0 drop=269 speed=0.444x
06-17 17:15:07.367 E: onProgress: frame= 99 fps= 11 q=16.0 size= 512kB time=00:00:03.83 bitrate=1094.8kbits/s dup=0 drop=285 speed=0.442x
06-17 17:15:07.875 E: onProgress: frame= 105 fps= 11 q=16.0 size= 512kB time=00:00:04.06 bitrate=1032.3kbits/s dup=0 drop=302 speed=0.443x
06-17 17:15:08.390 E: onProgress: frame= 111 fps= 11 q=15.0 size= 512kB time=00:00:04.29 bitrate= 976.5kbits/s dup=0 drop=320 speed=0.443x
06-17 17:15:08.895 E: onProgress: frame= 117 fps= 11 q=21.0 size= 512kB time=00:00:04.55 bitrate= 921.7kbits/s dup=0 drop=337 speed=0.446x
06-17 17:15:09.402 E: onProgress: frame= 123 fps= 11 q=21.0 size= 512kB time=00:00:04.78 bitrate= 876.9kbits/s dup=0 drop=355 speed=0.447x
06-17 17:15:09.925 E: onProgress: frame= 129 fps= 11 q=23.0 size= 512kB time=00:00:05.03 bitrate= 832.5kbits/s dup=0 drop=373 speed=0.449x
06-17 17:15:10.426 E: onProgress: frame= 135 fps= 12 q=23.0 size= 512kB time=00:00:05.27 bitrate= 795.8kbits/s dup=0 drop=389 speed=0.449x
06-17 17:15:10.927 E: onProgress: frame= 141 fps= 12 q=23.0 size= 768kB time=00:00:05.50 bitrate=1143.3kbits/s dup=0 drop=407 speed=0.45x
06-17 17:15:11.442 E: onProgress: frame= 148 fps= 12 q=23.0 size= 768kB time=00:00:05.75 bitrate=1092.6kbits/s dup=0 drop=425 speed=0.452x
06-17 17:15:11.813 E: onProgress: [mp3float @ 0xb386d400] Could not update timestamps for skipped samples.
06-17 17:15:11.947 E: onProgress: frame= 154 fps= 12 q=22.0 size= 768kB time=00:00:06.01 bitrate=1046.2kbits/s dup=0 drop=442 speed=0.454x
06-17 17:15:12.447 E: onProgress: frame= 158 fps= 11 q=22.0 size= 768kB time=00:00:06.17 bitrate=1018.7kbits/s dup=0 drop=453 speed=0.449x
06-17 17:15:12.961 E: onProgress: frame= 164 fps= 11 q=22.0 size= 768kB time=00:00:06.43 bitrate= 978.2kbits/s dup=0 drop=470 speed=0.451x
06-17 17:15:13.520 E: onProgress: frame= 170 fps= 11 q=23.0 size= 768kB time=00:00:06.66 bitrate= 944.1kbits/s dup=0 drop=487 speed=0.45x
06-17 17:15:13.993 E: onProgress: frame= 176 fps= 12 q=23.0 size= 768kB time=00:00:06.89 bitrate= 912.3kbits/s dup=0 drop=505 speed=0.451x
06-17 17:15:14.496 E: onProgress: frame= 182 fps= 12 q=24.0 size= 1024kB time=00:00:07.15 bitrate=1173.0kbits/s dup=0 drop=523 speed=0.453x
06-17 17:15:14.999 E: onProgress: frame= 189 fps= 12 q=22.0 size= 1024kB time=00:00:07.40 bitrate=1132.6kbits/s dup=0 drop=541 speed=0.454x
06-17 17:15:15.528 E: onProgress: frame= 195 fps= 12 q=23.0 size= 1024kB time=00:00:07.68 bitrate=1091.5kbits/s dup=0 drop=559 speed=0.457x
06-17 17:15:16.054 E: onProgress: frame= 202 fps= 12 q=19.0 size= 1024kB time=00:00:07.94 bitrate=1056.4kbits/s dup=0 drop=578 speed=0.458x
06-17 17:15:16.566 E: onProgress: frame= 209 fps= 12 q=18.0 size= 1024kB time=00:00:08.19 bitrate=1023.5kbits/s dup=0 drop=597 speed=0.459x
06-17 17:15:17.075 E: onProgress: frame= 215 fps= 12 q=23.0 size= 1024kB time=00:00:08.45 bitrate= 992.5kbits/s dup=0 drop=615 speed=0.46x
06-17 17:15:17.602 E: onProgress: frame= 221 fps= 12 q=18.0 size= 1280kB time=00:00:08.73 bitrate=1201.1kbits/s dup=0 drop=633 speed=0.462x
06-17 17:15:18.120 E: onProgress: frame= 228 fps= 12 q=21.0 size= 1280kB time=00:00:08.98 bitrate=1166.9kbits/s dup=0 drop=652 speed=0.463x
06-17 17:15:18.635 E: onProgress: frame= 235 fps= 12 q=22.0 size= 1280kB time=00:00:09.24 bitrate=1134.7kbits/s dup=0 drop=671 speed=0.464x
06-17 17:15:19.144 E: onProgress: frame= 241 fps= 12 q=20.0 size= 1280kB time=00:00:09.49 bitrate=1104.2kbits/s dup=0 drop=688 speed=0.465x
06-17 17:15:19.634 E: onProgress: frame= 247 fps= 12 q=23.0 size= 1280kB time=00:00:09.72 bitrate=1077.8kbits/s dup=0 drop=706 speed=0.465x
06-17 17:15:20.153 E: onProgress: frame= 252 fps= 12 q=23.0 size= 1280kB time=00:00:09.93 bitrate=1055.1kbits/s dup=0 drop=720 speed=0.463x
06-17 17:15:20.675 E: onProgress: frame= 258 fps= 12 q=24.0 size= 1280kB time=00:00:10.19 bitrate=1028.7kbits/s dup=0 drop=737 speed=0.464x
06-17 17:15:21.213 E: onProgress: frame= 259 fps= 12 q=24.0 size= 1280kB time=00:00:10.65 bitrate= 983.9kbits/s dup=0 drop=739 speed=0.474x
06-17 17:15:21.718 E: onProgress: frame= 259 fps= 11 q=24.0 size= 1280kB time=00:00:11.12 bitrate= 942.8kbits/s dup=0 drop=739 speed=0.483x
06-17 17:15:22.256 E: onProgress: frame= 259 fps= 11 q=24.0 size= 1280kB time=00:00:11.65 bitrate= 899.6kbits/s dup=0 drop=739 speed=0.495x
06-17 17:15:22.574 E: onProgress: [mp3float @ 0xb386d400] Could not update timestamps for skipped samples.
06-17 17:15:22.888 E: onProgress: frame= 259 fps= 11 q=24.0 size= 1280kB time=00:00:12.09 bitrate= 866.8kbits/s dup=0 drop=739 speed=0.502x
06-17 17:15:23.325 E: onProgress: frame= 259 fps= 11 q=24.0 size= 1280kB time=00:00:12.46 bitrate= 841.0kbits/s dup=0 drop=739 speed=0.507x
06-17 17:15:23.810 E: onProgress: frame= 259 fps= 10 q=24.0 size= 1280kB time=00:00:12.93 bitrate= 810.8kbits/s dup=0 drop=739 speed=0.515x
06-17 17:15:24.331 E: onProgress: frame= 259 fps= 10 q=24.0 size= 1280kB time=00:00:13.42 bitrate= 781.3kbits/s dup=0 drop=739 speed=0.524x
06-17 17:15:24.873 E: onProgress: frame= 259 fps=9.9 q=24.0 size= 1280kB time=00:00:13.93 bitrate= 752.7kbits/s dup=0 drop=739 speed=0.533x
06-17 17:15:25.374 E: onProgress: frame= 259 fps=9.7 q=24.0 size= 1280kB time=00:00:14.39 bitrate= 728.4kbits/s dup=0 drop=739 speed=0.54x
06-17 17:15:25.898 E: onProgress: frame= 259 fps=9.5 q=24.0 size= 1280kB time=00:00:14.86 bitrate= 705.6kbits/s dup=0 drop=739 speed=0.547x
06-17 17:15:26.407 E: onProgress: frame= 259 fps=9.4 q=24.0 size= 1280kB time=00:00:15.34 bitrate= 683.2kbits/s dup=0 drop=739 speed=0.554x
06-17 17:15:26.917 E: onProgress: frame= 259 fps=9.2 q=24.0 size= 1280kB time=00:00:15.85 bitrate= 661.2kbits/s dup=0 drop=739 speed=0.562x
06-17 17:15:27.430 E: onProgress: frame= 259 fps=9.0 q=24.0 size= 1280kB time=00:00:16.37 bitrate= 640.6kbits/s dup=0 drop=739 speed=0.57x
06-17 17:15:27.957 E: onProgress: frame= 259 fps=8.9 q=24.0 size= 1280kB time=00:00:16.76 bitrate= 625.5kbits/s dup=0 drop=739 speed=0.573x
06-17 17:15:28.489 E: onProgress: frame= 259 fps=8.7 q=24.0 size= 1280kB time=00:00:17.29 bitrate= 606.2kbits/s dup=0 drop=739 speed=0.581x
06-17 17:15:28.999 E: onProgress: frame= 259 fps=8.6 q=24.0 size= 1280kB time=00:00:17.78 bitrate= 589.6kbits/s dup=0 drop=739 speed=0.587x
06-17 17:15:29.187 E: onProgress: [mp3float @ 0xb386d400] Could not update timestamps for skipped samples.
06-17 17:15:29.567 E: onProgress: frame= 259 fps=8.4 q=24.0 size= 1280kB time=00:00:18.18 bitrate= 576.8kbits/s dup=0 drop=739 speed=0.589x
06-17 17:15:30.107 E: onProgress: frame= 259 fps=8.3 q=24.0 size= 1280kB time=00:00:18.73 bitrate= 559.6kbits/s dup=0 drop=739 speed=0.597x
06-17 17:15:30.606 E: onProgress: frame= 259 fps=8.1 q=24.0 size= 1280kB time=00:00:19.24 bitrate= 544.8kbits/s dup=0 drop=739 speed=0.604x
06-17 17:15:31.127 E: onProgress: frame= 259 fps=8.0 q=24.0 size= 1280kB time=00:00:19.78 bitrate= 530.0kbits/s dup=0 drop=739 speed=0.611x
06-17 17:15:31.626 E: onProgress: frame= 259 fps=7.9 q=24.0 size= 1280kB time=00:00:20.29 bitrate= 516.7kbits/s dup=0 drop=739 speed=0.617x
06-17 17:15:32.164 E: onProgress: frame= 259 fps=7.7 q=24.0 size= 1280kB time=00:00:20.85 bitrate= 502.9kbits/s dup=0 drop=739 speed=0.623x
06-17 17:15:32.686 E: onProgress: frame= 259 fps=7.6 q=24.0 size= 1280kB time=00:00:21.38 bitrate= 490.3kbits/s dup=0 drop=739 speed=0.629x
06-17 17:15:33.222 E: onProgress: frame= 259 fps=7.5 q=24.0 size= 1280kB time=00:00:21.89 bitrate= 478.9kbits/s dup=0 drop=739 speed=0.634x
06-17 17:15:33.744 E: onProgress: frame= 259 fps=7.4 q=24.0 size= 1280kB time=00:00:22.43 bitrate= 467.5kbits/s dup=0 drop=739 speed=0.64x
06-17 17:15:34.264 E: onProgress: frame= 259 fps=7.3 q=24.0 size= 1280kB time=00:00:22.96 bitrate= 456.6kbits/s dup=0 drop=739 speed=0.646x
06-17 17:15:34.764 E: onProgress: frame= 259 fps=7.2 q=24.0 size= 1280kB time=00:00:23.47 bitrate= 446.7kbits/s dup=0 drop=739 speed=0.651x
06-17 17:15:35.269 E: onProgress: [mp3float @ 0xb386d400] Could not update timestamps for skipped samples.
06-17 17:15:35.293 E: onProgress: frame= 259 fps=7.1 q=24.0 size= 1536kB time=00:00:24.00 bitrate= 524.1kbits/s dup=0 drop=739 speed=0.656x
06-17 17:15:35.792 E: onProgress: frame= 259 fps=7.0 q=24.0 size= 1536kB time=00:00:24.24 bitrate= 519.1kbits/s dup=0 drop=739 speed=0.654x
06-17 17:15:36.294 E: onProgress: frame= 259 fps=6.9 q=24.0 size= 1536kB time=00:00:24.75 bitrate= 508.4kbits/s dup=0 drop=739 speed=0.659x
06-17 17:15:36.812 E: onProgress: frame= 259 fps=6.8 q=24.0 size= 1536kB time=00:00:25.28 bitrate= 497.6kbits/s dup=0 drop=739 speed=0.664x
06-17 17:15:37.314 E: onProgress: frame= 259 fps=6.7 q=24.0 size= 1536kB time=00:00:25.79 bitrate= 487.8kbits/s dup=0 drop=739 speed=0.668x
06-17 17:15:37.832 E: onProgress: frame= 259 fps=6.6 q=24.0 size= 1536kB time=00:00:26.33 bitrate= 477.9kbits/s dup=0 drop=739 speed=0.673x
06-17 17:15:38.332 E: onProgress: frame= 259 fps=6.5 q=24.0 size= 1536kB time=00:00:26.84 bitrate= 468.8kbits/s dup=0 drop=739 speed=0.677x
06-17 17:15:38.850 E: onProgress: frame= 259 fps=6.5 q=24.0 size= 1536kB time=00:00:27.37 bitrate= 459.6kbits/s dup=0 drop=739 speed=0.682x
06-17 17:15:39.361 E: onProgress: frame= 259 fps=6.4 q=24.0 size= 1536kB time=00:00:27.88 bitrate= 451.2kbits/s dup=0 drop=739 speed=0.686x
06-17 17:15:39.877 E: onProgress: frame= 259 fps=6.3 q=24.0 size= 1536kB time=00:00:28.42 bitrate= 442.7kbits/s dup=0 drop=739 speed=0.69x
06-17 17:15:40.379 E: onProgress: frame= 259 fps=6.2 q=24.0 size= 1536kB time=00:00:28.93 bitrate= 434.9kbits/s dup=0 drop=739 speed=0.694x
06-17 17:15:40.898 E: onProgress: frame= 259 fps=6.1 q=24.0 size= 1536kB time=00:00:29.46 bitrate= 427.0kbits/s dup=0 drop=739 speed=0.698x
06-17 17:15:41.401 E: onProgress: frame= 259 fps=6.1 q=24.0 size= 1536kB time=00:00:29.97 bitrate= 419.8kbits/s dup=0 drop=739 speed=0.702x
06-17 17:15:41.406 E: onProgress: [mp3float @ 0xb386d400] Could not update timestamps for skipped samples.
06-17 17:15:41.916 E: onProgress: frame= 259 fps=6.0 q=24.0 size= 1536kB time=00:00:30.44 bitrate= 413.4kbits/s dup=0 drop=739 speed=0.705x
06-17 17:15:42.421 E: onProgress: frame= 259 fps=5.9 q=24.0 size= 1536kB time=00:00:30.95 bitrate= 406.5kbits/s dup=0 drop=739 speed=0.708x
06-17 17:15:42.946 E: onProgress: frame= 259 fps=5.9 q=24.0 size= 1536kB time=00:00:31.48 bitrate= 399.6kbits/s dup=0 drop=739 speed=0.712x
06-17 17:15:43.442 E: onProgress: frame= 259 fps=5.8 q=24.0 size= 1536kB time=00:00:31.99 bitrate= 393.3kbits/s dup=0 drop=739 speed=0.715x
06-17 17:15:43.959 E: onProgress: frame= 259 fps=5.7 q=24.0 size= 1536kB time=00:00:32.53 bitrate= 386.8kbits/s dup=0 drop=739 speed=0.719x
06-17 17:15:44.459 E: onProgress: frame= 259 fps=5.7 q=24.0 size= 1536kB time=00:00:33.04 bitrate= 380.8kbits/s dup=0 drop=739 speed=0.722x
06-17 17:15:44.976 E: onProgress: frame= 259 fps=5.6 q=24.0 size= 1536kB time=00:00:33.57 bitrate= 374.8kbits/s dup=0 drop=739 speed=0.726x
06-17 17:15:45.477 E: onProgress: frame= 259 fps=5.5 q=24.0 size= 1536kB time=00:00:34.08 bitrate= 369.2kbits/s dup=0 drop=739 speed=0.729x
06-17 17:15:45.993 E: onProgress: frame= 259 fps=5.5 q=24.0 size= 1536kB time=00:00:34.62 bitrate= 363.5kbits/s dup=0 drop=739 speed=0.732x
06-17 17:15:46.496 E: onProgress: frame= 259 fps=5.4 q=24.0 size= 1536kB time=00:00:35.13 bitrate= 358.2kbits/s dup=0 drop=739 speed=0.735x
06-17 17:15:47.014 E: onProgress: frame= 259 fps=5.4 q=24.0 size= 1536kB time=00:00:35.66 bitrate= 352.8kbits/s dup=0 drop=739 speed=0.738x
06-17 17:15:47.340 E: onProgress: [mp3float @ 0xb386d400] Could not update timestamps for skipped samples.
06-17 17:15:47.622 E: onProgress: frame= 259 fps=5.3 q=24.0 size= 1536kB time=00:00:36.10 bitrate= 348.5kbits/s dup=0 drop=739 speed=0.74x
06-17 17:15:48.042 E: onProgress: frame= 259 fps=5.3 q=24.0 size= 1536kB time=00:00:36.47 bitrate= 345.0kbits/s dup=0 drop=739 speed=0.74x
06-17 17:15:48.555 E: onProgress: frame= 259 fps=5.2 q=24.0 size= 1536kB time=00:00:36.98 bitrate= 340.2kbits/s dup=0 drop=739 speed=0.742x
06-17 17:15:49.066 E: onProgress: frame= 259 fps=5.1 q=24.0 size= 1536kB time=00:00:37.40 bitrate= 336.4kbits/s dup=0 drop=739 speed=0.743x
06-17 17:15:49.585 E: onProgress: frame= 259 fps=5.1 q=24.0 size= 1536kB time=00:00:37.94 bitrate= 331.7kbits/s dup=0 drop=739 speed=0.746x
06-17 17:15:50.083 E: onProgress: frame= 259 fps=5.0 q=24.0 size= 1536kB time=00:00:38.45 bitrate= 327.2kbits/s dup=0 drop=739 speed=0.748x
06-17 17:15:50.624 E: onProgress: frame= 259 fps=5.0 q=24.0 size= 1536kB time=00:00:39.00 bitrate= 322.6kbits/s dup=0 drop=739 speed=0.751x
06-17 17:15:51.145 E: onProgress: frame= 259 fps=4.9 q=24.0 size= 1536kB time=00:00:39.54 bitrate= 318.2kbits/s dup=0 drop=739 speed=0.754x
06-17 17:15:51.667 E: onProgress: frame= 259 fps=4.9 q=24.0 size= 1792kB time=00:00:40.07 bitrate= 366.3kbits/s dup=0 drop=739 speed=0.757x
06-17 17:15:52.190 E: onProgress: frame= 259 fps=4.8 q=24.0 size= 1792kB time=00:00:40.61 bitrate= 361.5kbits/s dup=0 drop=739 speed=0.759x
06-17 17:15:52.710 E: onProgress: frame= 259 fps=4.8 q=24.0 size= 1792kB time=00:00:41.14 bitrate= 356.8kbits/s dup=0 drop=739 speed=0.762x
06-17 17:15:53.210 E: onProgress: frame= 259 fps=4.8 q=24.0 size= 1792kB time=00:00:41.65 bitrate= 352.4kbits/s dup=0 drop=739 speed=0.764x
06-17 17:15:53.553 E: onProgress: [mp3float @ 0xb386d400] Could not update timestamps for skipped samples.
06-17 17:15:53.863 E: onProgress: frame= 259 fps=4.7 q=24.0 size= 1792kB time=00:00:42.14 bitrate= 348.3kbits/s dup=0 drop=739 speed=0.766x
06-17 17:15:54.286 E: onProgress: frame= 259 fps=4.7 q=24.0 size= 1792kB time=00:00:42.53 bitrate= 345.1kbits/s dup=0 drop=739 speed=0.766x
06-17 17:15:54.785 E: onProgress: frame= 259 fps=4.6 q=24.0 size= 1792kB time=00:00:43.04 bitrate= 341.0kbits/s dup=0 drop=739 speed=0.768x
06-17 17:15:55.304 E: onProgress: frame= 259 fps=4.6 q=24.0 size= 1792kB time=00:00:43.58 bitrate= 336.8kbits/s dup=0 drop=739 speed=0.77x
06-17 17:15:55.806 E: onProgress: frame= 259 fps=4.5 q=24.0 size= 1792kB time=00:00:44.09 bitrate= 332.9kbits/s dup=0 drop=739 speed=0.772x
06-17 17:15:56.348 E: onProgress: frame= 259 fps=4.5 q=24.0 size= 1792kB time=00:00:44.65 bitrate= 328.8kbits/s dup=0 drop=739 speed=0.775x
06-17 17:15:56.869 E: onProgress: frame= 259 fps=4.5 q=24.0 size= 1792kB time=00:00:45.18 bitrate= 324.9kbits/s dup=0 drop=739 speed=0.777x
06-17 17:15:57.387 E: onProgress: frame= 259 fps=4.4 q=24.0 size= 1792kB time=00:00:45.72 bitrate= 321.1kbits/s dup=0 drop=739 speed=0.779x
06-17 17:15:57.909 E: onProgress: frame= 259 fps=4.4 q=24.0 size= 1792kB time=00:00:46.25 bitrate= 317.4kbits/s dup=0 drop=739 speed=0.781x
06-17 17:15:58.477 E: onProgress: frame= 259 fps=4.3 q=24.0 size= 1792kB time=00:00:46.74 bitrate= 314.1kbits/s dup=0 drop=739 speed=0.782x
06-17 17:15:58.947 E: onProgress: frame= 259 fps=4.3 q=24.0 size= 1792kB time=00:00:47.25 bitrate= 310.7kbits/s dup=0 drop=739 speed=0.784x
06-17 17:15:59.480 E: onProgress: frame= 259 fps=4.3 q=24.0 size= 1792kB time=00:00:47.78 bitrate= 307.2kbits/s dup=0 drop=739 speed=0.786x
06-17 17:15:59.712 E: onProgress: [mp3float @ 0xb386d400] Could not update timestamps for skipped samples.
06-17 17:16:00.066 E: onProgress: frame= 259 fps=4.2 q=24.0 size= 1792kB time=00:00:48.18 bitrate= 304.7kbits/s dup=0 drop=739 speed=0.786x
06-17 17:16:00.545 E: onProgress: frame= 259 fps=4.2 q=24.0 size= 1792kB time=00:00:48.64 bitrate= 301.8kbits/s dup=0 drop=739 speed=0.787x
06-17 17:16:01.084 E: onProgress: frame= 259 fps=4.2 q=24.0 size= 1792kB time=00:00:49.20 bitrate= 298.4kbits/s dup=0 drop=739 speed=0.789x
Gyan 回答的第二个命令
[-y,
-f, lavfi, -i, amovie=/storage/emulated/0/VideoEditor/.caches/Video_editor_1560774174121.mp3:loop=0,
-i, /storage/emulated/0/Received/VID-20190407-WA0001.mp4,
-i, /storage/emulated/0/Received/MP4_20190220_114210.mp4,
-strict, experimental,
-filter_complex,
[1:v]scale=iw*min(480/iw\,480/ih):ih*min(480/iw\,480/ih), pad=480:480:(480-iw*min(480/iw\,480/ih))/2:(480-ih*min(480/iw\,480/ih))/2,setsar=1:1[v1];
[2:v]scale=iw*min(480/iw\,480/ih):ih*min(480/iw\,480/ih), pad=480:480:(480-iw*min(480/iw\,480/ih))/2:(480-ih*min(480/iw\,480/ih))/2,setsar=1:1[v2];
[v1][v2] concat=n=2:v=1[vTemp];[vTemp]setpts=0.25*PTS[finalv],
-map, [finalv], -map, 0:a,
-shortest, -preset, ultrafast,
/storage/emulated/0/VideoEditor/Video_editor_1560774181194.mp4]
我们将不胜感激。
最佳答案
我尝试了您的命令，最终为您找到了解决方案
用下面的命令试试这个功能
public long GetVideoDuration(String videoFile)
{
MediaMetadataRetriever retriever = new MediaMetadataRetriever();
retriever.setDataSource(context, Uri.fromFile(videoFile));
String time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
long seconds = TimeUnit.MILLISECONDS.toSeconds(Long.parseLong(time ));
retriever.release();
return seconds;
}
编辑命令...
[-y,
-i, /storage/emulated/0/Received/VID-20190407-WA0001.mp4,
-i, /storage/emulated/0/Received/MP4_20190220_114210.mp4,
-strict, experimental,
-filter_complex, [0:v]scale=iw*min(480/iw\,480/ih):ih*min(480/iw\,480/ih), pad=480:480:(480-iw*min(480/iw\,480/ih))/2:(480-ih*min(480/iw\,480/ih))/2,setsar=1:1[v0];
[1:v]scale=iw*min(480/iw\,480/ih):ih*min(480/iw\,480/ih), pad=480:480:(480-iw*min(480/iw\,480/ih))/2:(480-ih*min(480/iw\,480/ih))/2,setsar=1:1[v1];
[v0][v1] concat=n=2:v=1[vTemp];[vTemp]setpts=0.25*PTS[finalv];
amovie=/storage/emulated/0/VideoEditor/.caches/Video_editor_1560762451434.mp3:loop=0,asetpts=N/SR/TB[aaa],
-map, [finalv], -map, [aaa], -t, (GetVideoDuration(/storage/emulated/0/Received/VID-20190407-WA0001.mp4)+GetVideoDuration(/storage/emulated/0/Received/MP4_20190220_114210.mp4)) / 4
-shortest, -preset, ultrafast,
/storage/emulated/0/Video_1560762463583.mp4]
- GetVideoDuration(Video1)+GetVideoDuration(Video2)) / 4
- Addition Video1 Duration and Video2 Duration Than Divide By 4 because you was set speed 4x.
关于android - - 在 FFMPEG 中使用电影循环播放音频时最短不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/56629444/