安卓应用纯java代码编辑你需要的功能，不需要自己写C代码和NDK，只需要关注逻辑实现。
最新版本 ,3.22_02 点击下载。 提取密码：30hi 拓展库下载：libx264 提取密码：8u1i
文件处理
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1.视频压缩
-s 控制视频分辨率（如160X320） -b 比特率（例如 150K） 这两个参数直接决定压缩质量，分辨率高，比特率增加，都可以提升画质，但是同时也会增加文件体积。 //常规的压缩代码 ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -s 160x120 -r 25 -vcodec mpeg4 -b 150k -ab 48000 -ac 2 -ar 22050 /sdcard/videokit/out.mp4 //使用h264编码，需要拓展库 ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -vcodec libx264 -preset ultrafast -crf 24 -acodec aac -ar 44100 -ac 2 -b:a 96k -s 320x240 -aspect 4:3 /sdcard/videokit/out3.mp4建议使用数组格式的命令，可以避免校验出现的问题。例如：
String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/video kit/in.mp4","-strict","experimental","-s", "160x120","-r","25", "-vcodec", "mpeg4", "-b", "150k", "-ab","48000", "-ac", "2", "-ar", "22050", "/sdcard/video kit/out.mp4"};
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2.音频压缩
String commandStr = "ffmpeg -y -i /sdcard/vk2/in.wav -ar 44100 -ac 2 -ab 64k -f mp3 /sdcard/videokit/out.mp3";音频裁剪
String commandStr ={"ffmpeg","-y","-i","/storage/emulated/0/vk2/in.mp3","-strict","experimental","-acodec","copy","-ss","00:00:00","-t","00:00:03.000","/storage/emulated/0/videokit/out.mp3"}; -
3.视频旋转
旋转90度
ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -vf transpose=1 -s 160x120 -r 30 -aspect 4:3 -ab 48000 -ac 2 -ar 22050 -b 2097k /sdcard/video_output/out.mp4 -
4.视频画面局部裁剪
ffmpeg -y -i /sdcard/videokit/short.mp4 -strict experimental -vf crop=100:100:0:0 -s 320x240 -r 15 -aspect 3:4 -ab 12288 -vcodec mpeg4 -b 2097152 -sample_fmt s16 /sdcard/videokit/out.mp4 -
5.从视频内提取一帧保存为图片
ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -an -r 1/2 -ss 00:00:00.000 -t 00:00:03 /sdcard/videokit/filename%03d.jpg -
6.从视频中提取音频文件
//示例1 ffmpeg -y -i /sdcard/videokit/in.avi -strict experimental -acodec copy /sdcard/videokit/out.mp3 //示例2 ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -vn -ar 44100 -ac 2 -ab 256k -f mp3 /sdcard/videokit/out.mp3 -
7.对视频中的音频重新编码
ffmpeg -y -i /sdcard/in.mp4 -strict experimental -vcodec copy -acodec libmp3lame -ab 64k -ac 2 -b 1200000 -ar 22050 /sdcard/out.mp4 -
8.改变视频的分辨率，4:3 or 16:9
ffmpeg -y -i /sdcard/in.mp4 -strict experimental -vf transpose=3 -s 320x240 -r 15 -aspect 3:4 -ab 12288 -vcodec mpeg4 -b 2097152 -sample_fmt s16 /sdcard/out.mp4 -
9.从视频中剪辑一段时间的视频
ffmpeg -ss 00:00:01.000 -y -i /sdcard/videokit/in.mp4 -strict experimental -t 00:00:02.000 -s 320x240 -r 15 -vcodec mpeg4 -b 2097152 -ab 48000 -ac 2 -b 2097152 -ar 22050 /sdcard/videokit/out.mp4 -
10.音频转码
ffmpeg -y -i /sdcard/videokit/big.wav /sdcard/videokit/small.mp3 -
11.视频添加水印
// test with watermark.png 128x128, add it to /sdcard/videokit/ String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/videokit/in.mp4","-strict","experimental", "-vf", "movie=/sdcard/videokit/watermark.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:10 [out]","-s", "320x240","-r", "30", "-b", "15496k", "-vcodec", "mpeg4","-ab", "48000", "-ac", "2", "-ar", "22050", "/sdcard/videokit/out.mp4"};
流以及更多场景处理
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0.从安卓设备推流到PC设备，并播放。
// APP中使用这条命令 ( 192.168.1.11 是电脑的IP) ffmpeg -i /sdcard/videokit/2.mpg -strict experimental -f mpegts udp://192.168.1.11:8090 // (192.168.1.14 是安卓设备的 IP) ffplay -f mpegts -ast 1 -vst 0 -ar 48000 udp://192.168.1.14:8090
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1.从相机预览获取原始格式的视频流。
Parameters parameters = camera.getParameters(); imageFormat = parameters.getPreviewFormat(); if (imageFormat == ImageFormat.NV21) { Camera.Size previewSize = parameters.getPreviewSize(); frameWidth = previewSize.width; frameHeight = previewSize.height; Rect rect = new Rect(0, 0, frameWidth, frameHeight); YuvImage img = new YuvImage(data, ImageFormat.NV21, frameWidth, frameHeight, null); try { outStream.write(data); outStream.flush(); } }执行编码命令
"ffmpeg -f rawvideo -pix_fmt nv21 -s 640x480 -r 15 -i " + Environment.getExternalStorageDirectory().getAbsolutePath().toString() + "/yuv.data rtmp://host/stream.flv" -
2.从一台设备接收另一台设备的视频流，并保持为文件。 【记得添加网络权限】
//第一台设备： ffmpeg -i /sdcard/one3.mp4 -f mpegts udp://192.168.0.107:8090 // //第二台设备： String[] complexCommand = {"ffmpeg","-y" ,"-i", "udp://192.168.0.108:8090","-strict","experimental","-crf", "30","-preset", "ultrafast", "-acodec", "aac", "-ar", "44100", "-ac", "2", "-b:a", "96k", "-vcodec", "libx264", "-r", "25", "-b:v", "500k", "-f", "flv", "/sdcard/videokit/t.flv"}; -
3.H264编码（需要拓展库）
//例子1 ffmpeg -y -i /sdcard/Video/1.MTS -strict experimental -vcodec libx264 -preset ultrafast -crf 24 /sdcard/videokit/out.mp4 //例子2 ffmpeg -y -i /sdcard/videokit/m.mkv -strict experimental -vcodec libx264 -preset ultrafast -crf 24 -sn /sdcard/videokit/m2.mkv -
4.添加字幕
//例子1 ffmpeg -y -i /sdcard/videokit/m2.mkv -i /sdcard/videokit/in.srt -strict experimental -vcodec libx264 -preset ultrafast -crf 24 -scodec copy /sdcard/videokit/mo.mkv //例子2 ffmpeg -y -i /sdcard/videokit/m2.mkv -i /sdcard/videokit/in.srt -strict experimental -scodec copy /sdcard/videokit/outm3.mkv -
5.将一个mp3音频文件转为m4a格式
ffmpeg -i /sdcard/videokit/in.mp3 /sdcard/videokit/out.m4a -
6.将一个视频和一个音频文件渲染为一个H.264编码的视频（需要额外的编码库）
ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -vcodec libx264 -crf 24 -acodec aac /sdcard/videokit/out.mkv -
7.添加复古滤镜
commandStr = "ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -vf curves=vintage -s 640x480 -r 30 -aspect 4:3 -ab 48000 -ac 2 -ar 22050 -b 2097k -vcodec mpeg4 /sdcard/videokit/curve.mp4"; -
8.黑白滤镜
commandStr = "ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -vf hue=s=0 -vcodec mpeg4 -b 2097152 -s 320x240 -r 30 /sdcard/videokit/out.mp4"; -
9.色彩通道滤镜，类似PS中的颜色通道
String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/videokit/sample.mp4","-strict", "experimental", "-filter_complex", "[0:v]colorchannelmixer=.393:.769:.189:0:.349:.686:.168:0:.272:.534:.131[colorchannelmixed];[colorchannelmixed]eq=1.0:0:1.3:2.4:1.0:1.0:1.0:1.0[color_effect]", "-map", "[color_effect]","-map", "0:a", "-vcodec", "mpeg4","-b", "15496k", "-ab", "48000", "-ac", "2", "-ar", "22050","/sdcard/videokit/out.mp4"}; -
10.添加用PS的曲线制作的滤镜，也就是可以自己制作滤镜 在PS中，选择图像>调整>曲线，调出曲线窗口，或者直接按快捷键Ctrl+N，调出曲线窗口 将调整好的效果导出为acv文件，将其路径添加到ffmpeg命令中
String[] complexCommand={"ffmpeg","-y","-i","/storage/emulated/0/vk2/in.mp4","-strict","experimental","-vf","curves=psfile=/storage/emulated/0/videokit/sepia.acv","-b","2097k","-vcodec","mpeg4","-ab","48000","-ac","2","-ar","22050","/storage/emulated/0/videokit/out.mp4"} -
11.为视频添加淡入和淡出过渡效果
String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/videokit/in.m4v","-acodec", "copy", "-vf", "fade=t=in:st=0:d=5, fade=t=out:st=20:d=5", "/sdcard/videokit/out.mp4"}; -
12.将两个同尺寸的视频文件拼接并输出
String[] complexCommand = {"ffmpeg","-y","-i", "/sdcard/videokit/in1.mp4", "-i", "/sdcard/videokit/in2.mp4", "-strict","experimental", "-filter_complex", "[0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1", "/sdcard/videokit/out.mp4"}; // //拼接不同编码，不同尺寸，不同帧率，不同纵横比的视频 String[] complexCommand = {"ffmpeg","-y","-i","/storage/emulated/0/videokit/sample.mp4", "-i","/storage/emulated/0/videokit/in.mp4","-strict","experimental", "-filter_complex", "[0:v]scale=640x480,setsar=1:1[v0];[1:v]scale=640x480,setsar=1:1[v1];[v0][0:a][v1][1:a] concat=n=2:v=1:a=1", "-ab","48000","-ac","2","-ar","22050","-s","640x480","-r","30","-vcodec","mpeg4","-b","2097k","/storage/emulated/0/vk2_out/out.mp4"} -
13.将一组图片序列渲染为视频文件，图片必须按照规律的格式有序。 此命令严格要求图片序列尺寸统一，对应输出视频的分辨率
commandStr = "ffmpeg -y -r 1/5 -i /sdcard/videokit/pic00%d.jpg /sdcard/videokit/out.mp4"; //添加音频，png也可以，这里的图片尺寸应该为320x240 ffmpeg -y -r 1 -i /sdcard/videokit/pic00%d.jpg -i /sdcard/videokit/in.mp3 -strict experimental -ar 44100 -ac 2 -ab 256k -b 2097152 -ar 22050 -vcodec mpeg4 -b 2097152 -s 320x240 /sdcard/videokit/out.mp4 -
14.Advanced filtering（这个功能从字面我没理解，待亲自验证后再解释）
String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/videokit/in.mp4","-strict","experimental", "-vf", "crop=iw/2:ih:0:0,split[tmp],pad=2*iw[left]; [tmp]hflip[right]; [left][right] overlay=W/2", "-vb", "20M", "-r", "23.956", "/sdcard/videokit/out.mp4"}; -
15.加快视频和音频文件播放速度，也就是时间压缩。
String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/videokit/in.mp4","-strict","experimental", "-filter_complex", "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]","-map","[v]","-map","[a]", "-b", "2097k","-r","60", "-vcodec", "mpeg4", "/sdcard/videokit/out.mp4"}; -
16.将两个视频并排显示
String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/Movies/sample.mp4","-i", "/sdcard/Movies/sample2.mp4", "-strict","experimental", "-filter_complex", "[0:v:0]pad=iw*2:ih[bg];" + "[bg][1:v:0]overlay=w", "-s", "320x240","-r", "30", "-b", "15496k", "-vcodec", "mpeg4","-ab", "48000", "-ac", "2", "-ar", "22050", "/sdcard/videokit/out.mp4"}; -
17.添加时间水印
String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/Movies/sample.mp4","-strict","experimental", "-vf", "movie=/sdcard/videokit/watermark002.png [watermark];" + "[in][watermark] overlay=main_w-overlay_w-10:10 [out_overlay];" + "[out_overlay]curves=vintage[out]", "-s", "320x240","-r", "30", "-b", "15496k", "-vcodec", "mpeg4","-ab", "48000", "-ac", "2", "-ar", "22050", "/sdcard/videokit/out_water_vinta.mp4"}; -
18.加水印，音频替换
String commandStr = "ffmpeg -y -loop 1 -i /sdcard/videokit/pic001.jpg -i /sdcard/videokit/in.mp3 -strict experimental -s 1270x720 -r 25 -aspect 16:9 -vcodec mpeg4 -vcodec mpeg4 -ab 48000 -ac 2 -b 2097152 -ar 22050 -shortest /sdcard/videokit/out2.mp4"; -
19.更换视频音轨
String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/videokit/sample.mp4","-i", "/sdcard/videokit/in.mp3", "-strict","experimental", "-map", "0:v", "-map", "1:a", "-s", "320x240","-r", "30", "-b", "15496k", "-vcodec", "mpeg4","-ab", "48000", "-ac", "2", "-ar", "22050","-shortest","/sdcard/videokit/out.mp4"}; -
20.GIF图片转视频，或者视频转为GIF图片
//Compress animated gif: fmpeg -f gif -i /sdcard/videokit/pic1.gif -strict experimental -r 10 /sdcard/videokit/pic1_1.gif //Convert mp4 to animated gif: ffmpeg -y -i /sdcard/videokit/in.mp4 -strict experimental -r 20 /sdcard/videokit/out.gif //Convert animated gif to mp4: ffmpeg -y -f gif -i /sdcard/videokit/infile.gif /sdcard/videokit/outfile.mp4
Copyright 2017 Johnny Shieh Open Project
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you may not use this file except in compliance with the License.
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