在Android上使用FFMpeg进行视频裁剪非常慢

时间:2017-04-06 12:15:55

标签: android video ffmpeg

我尝试了什么:

我正在尝试使用FFMpeg(ffmpeg-android)在Android上实现视频裁剪。

这是我使用的命令:

String[] complexCommand = {"-i", inputPath, "-strict", "experimental", "-vf", "crop=1080:1080:0:0", "-threads", "5", "-c:v", "libx264", "-preset", "ultrafast", filePath};

问题:

视频裁剪工作正常,但即使我使用所有需要的选项来快速完成操作,仍然需要1分钟长的视频才能裁剪相同的时间。

如何获得更好的速度?
我是否需要在服务器而不是设备上实现视频裁剪? 还有另一种方法可以在Android而不是FFMpeg上实现视频裁剪吗?

据我所知,通过让用户在后台进行实际裁剪时编辑裁剪的TextureView / SurfaceView可以实现更好的用户体验,但我想避免这种方式,因为它需要更多时间。

更新

这是FFMpeg的日志输出:

SUCCESS 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
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DCIM/100ANDRO/MOV_0066.mp4':
    Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2017-04-02 11:58:58
    com.android.version: 6.0.1
    Duration: 00:00:59.60, start: 0.000000, bitrate: 17759 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 17498 kb/s, SAR 1:1 DAR 16:9, 29.90 fps, 29.92 tbr, 90k tbn, 180k tbc (default)
    Metadata:
    rotate          : 90
    creation_time   : 2017-04-02 11:58:58
    handler_name    : VideoHandle
    Side data:
    displaymatrix: rotation of -90.00 degrees
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 155 kb/s (default)
    Metadata:
    creation_time   : 2017-04-02 11:58:58
    handler_name    : SoundHandle
    [libx264 @ 0xb5bc4400] using SAR=1/1
    [libx264 @ 0xb5bc4400] using cpu capabilities: none!
    [libx264 @ 0xb5bc4400] profile High 4:4:4 Predictive, level 3.2, 4:2:0 8-bit
    [libx264 @ 0xb5bc4400] 64 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x1:0x1 me=dia subme=1 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=5 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=0
    Output #0, mp4, to '/storage/emulated/0/Download/compress_video1.mp4':
    Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    com.android.version: 6.0.1
    encoder         : Lavf57.25.100
    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1080x1080 [SAR 1:1 DAR 1:1], q=-1--1, 29.92 fps, 11488 tbn, 29.92 tbc (default)
    Metadata:
    handler_name    : VideoHandle
    creation_time   : 2017-04-02 11:58:58
    encoder         : Lavc57.24.102 libx264
    Side data:
    unknown side data type 10 (24 bytes)
    Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
    creation_time   : 2017-04-02 11:58:58
    handler_name    : SoundHandle
    encoder         : Lavc57.24.102 aac
    Stream mapping:
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    Press [q] to stop, [?] for help
    frame=    6 fps=0.0 q

非常感谢任何帮助!

1 个答案:

答案 0 :(得分:0)

  1. 使用较小分辨率
  2. 如果您有一台好的服务器,请使用服务器大小的裁剪。记住并不总是有良好的互联网连接。
  3. FFMPEG如果相当快。让你的概念更好。