我尝试使用FFMPEG
在Android设备上缩小视频。
在调用scaleVideo()
的Activity的OnCreate
中,还有FFMPEG
和二进制文件的初始化加载。
private void scaleVideo(String path) throws FFmpegCommandAlreadyRunningException, IOException {
File copy = new File(DESTINATION_PATH + FilenameUtils.getBaseName(path) + "_scaled." + FilenameUtils.getExtension(path));
if (!copy.exists())
copy.createNewFile();
String cmd = "-i " + path + " -vf scale=320:-1 " + copy.getPath();
String[] command = cmd.split(" ");
fFmpeg.execute(command, new FFmpegExecuteResponseHandler() {
@Override
public void onSuccess(String message) {
Log.i("FFmpeg", message);
mProgressDialog.cancel();
runOnUiThread(() -> Toast.makeText(TrimmerActivity.this, getString(R.string.video_saved_at, copy.getPath()), Toast.LENGTH_SHORT).show());
VideoModel videoModel = new VideoModel();
videoModel.setPath(copy.getPath());
videoModel.save();
finish();
}
@Override
public void onProgress(String message) {
Log.i("FFmpeg", message);
}
@Override
public void onFailure(String message) {
Log.e("FFmpeg", message);
}
@Override
public void onStart() {
Log.i("FFmpeg", "on start");
}
@Override
public void onFinish() {
Log.i("FFmpeg", "on finish");
}
});
}
我得到的输出如下:
I/FFmpeg: on start
D/FFmpeg: Running publishing updates method
I/FFmpeg: ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
I/FFmpeg: built with gcc 4.8 (GCC)
I/FFmpeg: 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=
I/FFmpeg: libavutil 55. 17.103 / 55. 17.103
I/FFmpeg: libavcodec 57. 24.102 / 57. 24.102
I/FFmpeg: libavformat 57. 25.100 / 57. 25.100
I/FFmpeg: libavdevice 57. 0.101 / 57. 0.101
I/FFmpeg: libavfilter 6. 31.100 / 6. 31.100
I/FFmpeg: libswscale 4. 0.100 / 4. 0.100
I/FFmpeg: libswresample 2. 0.101 / 2. 0.101
I/FFmpeg: libpostproc 54. 0.100 / 54. 0.100
I/FFmpeg: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/MP4_20161015_001403.mp4':
I/FFmpeg: Metadata:
I/FFmpeg: major_brand : iso6
I/FFmpeg: minor_version : 1
I/FFmpeg: compatible_brands: mp42iso6avc1isom
I/FFmpeg: creation_time : 2016-10-14 21:14:03
I/FFmpeg: Duration: 00:00:02.10, start: 0.000000, bitrate: 19564 kb/s
I/FFmpeg: Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 19403 kb/s, SAR 1:1 DAR 16:9, 14.75 fps, 15 tbr, 90k tbn, 180k tbc (default)
I/FFmpeg: Metadata:
I/FFmpeg: rotate : 90
I/FFmpeg: creation_time : 2016-10-14 21:13:52
I/FFmpeg: Side data:
I/FFmpeg: displaymatrix: rotation of -90.00 degrees
I/FFmpeg: Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 156 kb/s (default)
I/FFmpeg: Metadata:
I/FFmpeg: creation_time : 2016-10-14 21:13:52
视频输出和输入正确。文件存在且视频播放器能够识别输入。
这就是全部。CPU/GPU/内存不做任何事情,也没有任何回调被调用。
这是我第一次使用FFMPEG
,所以我不知道该怎么做。
ffmpeg
命令。 - llogan