k
/
FFmpegAndroid
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

translate notes into English

Browse Source 
translate notes into English
pull/166/head
xufulong 5 years ago
parent f7235f36a5
commit ce2ed653ea
1 changed files with 139 additions and 142 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 281
      app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java

281
app/src/main/java/com/frank/ffmpeg/util/FFmpegUtil.java
Unescape View File

@ -8,18 +8,18 @@ import java.util.List;
import java.util.Locale;
/**
* ffmpeg工具：拼接命令行处理音视频
* ffmpeg tool: assemble the complete command
* Created by frank on 2018/1/23.
*/
public class FFmpegUtil {
/**
* 使用ffmpeg命令行进行音频转码
* transform audio, according to your assigning the output format
*
* @param srcFile 源文件
* @param targetFile 目标文件（后缀指定转码格式）
* @return 转码后的文件
* @param srcFile input file
* @param targetFile output file
* @return transform success or not
*/
public static String[] transformAudio(String srcFile, String targetFile) {
String transformAudioCmd = "ffmpeg -i %s %s";
@ -28,13 +28,13 @@ public class FFmpegUtil {
}
/**
* 使用ffmpeg命令行进行音频剪切
* cut audio, you could assign the startTime and duration which you want to
*
* @param srcFile 源文件
* @param startTime 剪切的开始时间(单位为秒)
* @param duration 剪切时长(单位为秒)
* @param targetFile 目标文件
* @return 剪切后的文件
* @param srcFile input file
* @param startTime start time in the audio(unit is second)
* @param duration start time(unit is second)
* @param targetFile output file
* @return cut success or not
*/
@SuppressLint("DefaultLocale")
public static String[] cutAudio(String srcFile, int startTime, int duration, String targetFile) {
@ -44,11 +44,11 @@ public class FFmpegUtil {
}
/**
* 使用ffmpeg命令行进行音频合并
* concat all the audio together
*
* @param fileList 合并列表
* @param targetFile 目标文件
* @return 合并后的文件
* @param fileList list of files
* @param targetFile output file
* @return concat success or not
*/
public static String[] concatAudio(List<String> fileList, String targetFile) {
// ffmpeg -i concat:%s|%s -acodec copy %s
@ -67,62 +67,61 @@ public class FFmpegUtil {
}
/**
* 使用ffmpeg命令行进行音频混合
* mix one and another audio
*
* @param srcFile 源文件
* @param mixFile 待混合文件
* @param targetFile 目标文件
* @return 混合后的文件
* @param srcFile input file
* @param mixFile background music
* @param targetFile output file
* @return mix success or not
*/
public static String[] mixAudio(String srcFile, String mixFile, String targetFile) {
//调节音量:使用-vol 50, 其中vol为0-100
//adjust volume:using '-vol 50', which is form 0 to 100
String mixAudioCmd = "ffmpeg -i %s -i %s -filter_complex amix=inputs=2:duration=first -strict -2 %s";
mixAudioCmd = String.format(mixAudioCmd, srcFile, mixFile, targetFile);
return mixAudioCmd.split(" ");
}
//混音公式：value = sample1 + sample2 - (sample1 * sample2 / (pow(2, 16-1) - 1))
//mixing formula: value = sample1 + sample2 - (sample1 * sample2 / (pow(2, 16-1) - 1))
/**
* 使用ffmpeg命令行进行音视频合成
* mux audio and video together
*
* @param videoFile 视频文件
* @param audioFile 音频文件
* @param duration 视频时长
* @param muxFile 目标文件
* @return 合成后的文件
* @param videoFile the file of pure video
* @param audioFile the file of pure audio
* @param duration the duration of video
* @param muxFile output file
* @return mux success or not
*/
@SuppressLint("DefaultLocale")
public static String[] mediaMux(String videoFile, String audioFile, int duration, String muxFile) {
//-t:时长 如果忽略音视频时长，则把"-t %d"去掉
String mixAudioCmd = "ffmpeg -i %s -i %s -t %d %s";
mixAudioCmd = String.format(mixAudioCmd, videoFile, audioFile, duration, muxFile);
return mixAudioCmd.split(" ");
}
/**
* 使用ffmpeg命令行进行抽取音频
* extract audio from media file
*
* @param srcFile 原文件
* @param targetFile 目标文件
* @return 抽取后的音频文件
* @param srcFile input file
* @param targetFile output file
* @return demux audio success or not
*/
public static String[] extractAudio(String srcFile, String targetFile) {
//-vn:video not
//-vn: disable video
String mixAudioCmd = "ffmpeg -i %s -acodec copy -vn %s";
mixAudioCmd = String.format(mixAudioCmd, srcFile, targetFile);
return mixAudioCmd.split(" ");
}
/**
* 使用ffmpeg命令行进行抽取视频
* extract pure video from media file
*
* @param srcFile 原文件
* @param targetFile 目标文件
* @return 抽取后的视频文件
* @param srcFile input file
* @param targetFile output file
* @return demux video success or not
*/
public static String[] extractVideo(String srcFile, String targetFile) {
//-an audio not
//-an: disable audio
String mixAudioCmd = "ffmpeg -i %s -vcodec copy -an %s";
mixAudioCmd = String.format(mixAudioCmd, srcFile, targetFile);
return mixAudioCmd.split(" ");
@ -130,16 +129,16 @@ public class FFmpegUtil {
/**
* 使用ffmpeg命令行进行视频转码
* transform video, according to your assigning the output format
*
* @param srcFile 源文件
* @param targetFile 目标文件（后缀指定转码格式）
* @return 转码后的文件
* @param srcFile input file
* @param targetFile output file
* @return transform video success or not
*/
public static String[] transformVideo(String srcFile, String targetFile) {
// 指定视频的帧率、码率、分辨率
// assign the frameRate, bitRate and resolution
// String transformVideoCmd = "ffmpeg -i %s -r 25 -b 200 -s 1080x720 %s";
// 指定视频编码器:解决有旋转角度的视频，转码后发生旋转的问题
// assign the encoder
// String transformVideoCmd = "ffmpeg -i %s -vcodec libx264 -acodec copy %s";
String transformVideoCmd = "ffmpeg -i %s -vcodec copy -acodec copy %s";
transformVideoCmd = String.format(transformVideoCmd, srcFile, targetFile);
@ -153,7 +152,7 @@ public class FFmpegUtil {
* @param width the width of video
* @param height the height of video
* @param targetFile target file
* @return file after transform
* @return transform video success or not
*/
public static String[] transformVideo(String srcFile, int width, int height, String targetFile) {
String scale = "-vf scale=" + width + ":" + height;
@ -163,29 +162,29 @@ public class FFmpegUtil {
}
/**
* 使用ffmpeg命令行进行视频剪切
* cut video, you could assign the startTime and duration which you want to
*
* @param srcFile 源文件
* @param startTime 剪切的开始时间(单位为秒)
* @param duration 剪切时长(单位为秒)
* @param targetFile 目标文件
* @return 剪切后的文件
* @param srcFile input file
* @param startTime startTime in the video(unit is second)
* @param duration duration
* @param targetFile output file
* @return cut video success or not
*/
@SuppressLint("DefaultLocale")
public static String[] cutVideo(String srcFile, int startTime, int duration, String targetFile) {
//指定音视频编码器:ffmpeg -i %s -ss %d -t %d -acodec libmp3lame -vcodec libx264 %s
//assign encoders: ffmpeg -i %s -ss %d -t %d -acodec libmp3lame -vcodec libx264 %s
String cutVideoCmd = "ffmpeg -i %s -ss %d -t %d -acodec copy -vcodec copy %s";
cutVideoCmd = String.format(cutVideoCmd, srcFile, startTime, duration, targetFile);
return cutVideoCmd.split(" ");
}
/**
* 使用ffmpeg命令行进行视频截图
* screenshot from video, you could assign the specific time
*
* @param srcFile 源文件
* @param time 截图开始时间
* @param targetFile 目标文件
* @return 截图后的文件
* @param srcFile input file
* @param time which time you want to shot
* @param targetFile output file
* @return screenshot success or not
*/
public static String[] screenShot(String srcFile, int time, String targetFile) {
String screenShotCmd = "ffmpeg -i %s -f image2 -ss %d -vframes 1 -an %s";
@ -194,30 +193,30 @@ public class FFmpegUtil {
}
/**
* 使用ffmpeg命令行给视频添加水印
* add watermark to video, you could assign the resolution and bitRate
*
* @param srcFile 源文件
* @param waterMark 水印文件路径
* @param targetFile 目标文件
* @return 添加水印后的文件
* @param srcFile input file
* @param waterMark the path of the watermark
* @param targetFile output file
* @return add watermark success or not
*/
public static String[] addWaterMark(String srcFile, String waterMark, String resolution, int bitRate, String targetFile) {
String mBitRate = String.valueOf(bitRate) + "k";
String mBitRate = bitRate + "k";
String waterMarkCmd = "ffmpeg -i %s -i %s -s %s -b:v %s -filter_complex overlay=0:0 %s";
waterMarkCmd = String.format(waterMarkCmd, srcFile, waterMark, resolution, mBitRate, targetFile);
return waterMarkCmd.split(" ");
}
/**
* 使用ffmpeg命令行进行视频转成Gif动图
* convert video into gif
*
* @param srcFile 源文件
* @param startTime 开始时间
* @param duration 截取时长
* @param targetFile 目标文件
* @param resolution 分辨率
* @param frameRate 帧率
* @return Gif文件
* @param srcFile input file
* @param startTime startTime in the video
* @param duration duration, how long you want to
* @param targetFile output file
* @param resolution resolution of the gif
* @param frameRate frameRate of the gif
* @return convert gif success or not
*/
@SuppressLint("DefaultLocale")
public static String[] generateGif(String srcFile, int startTime, int duration,
@ -229,46 +228,44 @@ public class FFmpegUtil {
}
/**
* 使用ffmpeg命令行进行屏幕录制
* screen record
*
* @param size 视频尺寸大小
* @param recordTime 录屏时间
* @param targetFile 目标文件
* @return 屏幕录制文件
* @param size size of video
* @param recordTime startTime in the video
* @param targetFile output file
* @return record success or not
*/
@SuppressLint("DefaultLocale")
public static String[] screenRecord(String size, int recordTime, String targetFile) {
//-vd x11:0,0 指录制所使用的偏移为 x=0 和 y=0
//String screenRecordCmd = "ffmpeg -vcodec mpeg4 -b 1000 -r 10 -g 300 -vd x11:0,0 -s %s %s";
String screenRecordCmd = "ffmpeg -vcodec mpeg4 -b 1000 -r 10 -g 300 -vd x11:0,0 -s %s -t %d %s";
screenRecordCmd = String.format(screenRecordCmd, size, recordTime, targetFile);
return screenRecordCmd.split(" ");
}
/**
* 使用ffmpeg命令行进行图片合成视频
* convert s series of pictures into video
*
* @param srcFile 源文件
* @param frameRate 合成视频帧率
* @param targetFile 目标文件
* @return 合成的视频文件
* @param srcFile input file
* @param frameRate frameRate
* @param targetFile output file
* @return convert success or not
*/
@SuppressLint("DefaultLocale")
public static String[] pictureToVideo(String srcFile, int frameRate, String targetFile) {
//-f image2：代表使用image2格式，需要放在输入文件前面
//-f: stand for format
String combineVideo = "ffmpeg -f image2 -r %d -i %simg#d.jpg -vcodec mpeg4 %s";
combineVideo = String.format(combineVideo, frameRate, srcFile, targetFile);
combineVideo = combineVideo.replace("#", "%");
return combineVideo.split(" ");//以空格分割为字符串数组
return combineVideo.split(" ");
}
/**
* 转换图片尺寸大小
* convert resolution
*
* @param srcFile 源文件
* @param resolution 分辨率
* @param targetFile 目标文件
* @return 转换后的图片命令行
* @param srcFile input file
* @param resolution resolution
* @param targetFile output file
* @return convert success or not
*/
@SuppressLint("DefaultLocale")
public static String[] convertResolution(String srcFile, String resolution, String targetFile) {
@ -278,13 +275,13 @@ public class FFmpegUtil {
}
/**
* 音频编码
* encode audio, you could assign the sampleRate and channel
*
* @param srcFile 源文件pcm裸流
* @param targetFile 编码后目标文件
* @param sampleRate 采样率
* @param channel 声道:单声道为1/立体声道为2
* @return 音频编码的命令行
* @param srcFile pcm raw audio
* @param targetFile output file
* @param sampleRate sampleRate
* @param channel sound channel: mono channel is 1, stereo channel is 2
* @return encode audio success or not
*/
@SuppressLint("DefaultLocale")
public static String[] encodeAudio(String srcFile, String targetFile, int sampleRate, int channel) {
@ -294,19 +291,19 @@ public class FFmpegUtil {
}
/**
* 多画面拼接视频
* join multi videos together
*
* @param input1 输入文件1
* @param input2 输入文件2
* @param videoLayout 视频布局
* @param targetFile 画面拼接文件
* @return 画面拼接的命令行
* @param input1 input one
* @param input2 input two
* @param videoLayout the layout of video, which could be horizontal or vertical
* @param targetFile output file
* @return join success or not
*/
public static String[] multiVideo(String input1, String input2, String targetFile, int videoLayout) {
// String multiVideo = "ffmpeg -i %s -i %s -i %s -i %s -filter_complex " +
// "\"[0:v]pad=iw*2:ih*2[a];[a][1:v]overlay=w[b];[b][2:v]overlay=0:h[c];[c][3:v]overlay=w:h\" %s";
String multiVideo = "ffmpeg -i %s -i %s -filter_complex hstack %s";//hstack:水平拼接，默认
if (videoLayout == VideoLayout.LAYOUT_VERTICAL) {//vstack:垂直拼接
String multiVideo = "ffmpeg -i %s -i %s -filter_complex hstack %s";//hstack: horizontal
if (videoLayout == VideoLayout.LAYOUT_VERTICAL) {//vstack: vertical
multiVideo = multiVideo.replace("hstack", "vstack");
}
multiVideo = String.format(multiVideo, input1, input2, targetFile);
@ -314,47 +311,47 @@ public class FFmpegUtil {
}
/**
* 视频反序倒播
* reverse video
*
* @param inputFile 输入文件
* @param targetFile 反序文件
* @return 视频反序的命令行
* @param inputFile input file
* @param targetFile output file
* @return reverse success or not
*/
public static String[] reverseVideo(String inputFile, String targetFile) {
//-vf reverse视频反序, -an去掉音频
//视频反序比较耗时, 建议用来处理1分钟以内的短视频
//-vf reverse: only video reverse, -an: disable audio
//tip: reverse will cost a lot of time, only short video are recommended
String reverseVideo = "ffmpeg -i %s -vf reverse -an %s";
reverseVideo = String.format(reverseVideo, inputFile, targetFile);
return reverseVideo.split(" ");
}
/**
* 视频降噪
* noise reduction with video
*
* @param inputFile 输入文件
* @param targetFile 输出文件
* @return 视频降噪的命令行
* @param inputFile input file
* @param targetFile output file
* @return noise reduction success or not
*/
public static String[] denoiseVideo(String inputFile, String targetFile) {
String reverseVideo = "ffmpeg -i %s -nr 500 %s";
reverseVideo = String.format(reverseVideo, inputFile, targetFile);
return reverseVideo.split(" ");
String denoiseVideo = "ffmpeg -i %s -nr 500 %s";
denoiseVideo = String.format(denoiseVideo, inputFile, targetFile);
return denoiseVideo.split(" ");
}
/**
* 视频抽帧转成图片
* covert video into a series of pictures
*
* @param inputFile 输入文件
* @param startTime 开始时间
* @param duration 持续时间
* @param frameRate 帧率
* @param targetFile 输出文件
* @return 视频抽帧的命令行
* @param inputFile input file
* @param startTime startTime in the video
* @param duration duration, how long you want
* @param frameRate frameRate
* @param targetFile output file
* @return convert success or not
*/
public static String[] videoToImage(String inputFile, int startTime, int duration, int frameRate, String targetFile) {
//-ss：开始时间，单位为秒
//-t：持续时间，单位为秒
//-r：帧率，每秒抽多少帧
//-ss：start time
//-t：duration
//-r：frame rate
String toImage = "ffmpeg -i %s -ss %s -t %s -r %s %s";
toImage = String.format(Locale.CHINESE, toImage, inputFile, startTime, duration, frameRate, targetFile);
toImage = toImage + "%3d.jpg";
@ -362,28 +359,28 @@ public class FFmpegUtil {
}
/**
* 视频叠加成画中画
* convert videos into picture-in-picture mode
*
* @param inputFile1 输入文件
* @param inputFile2 输入文件
* @param targetFile 输出文件
* @param x 小视频起点x坐标
* @param y 小视频起点y坐标
* @return 视频画中画的命令行
* @param inputFile1 input one
* @param inputFile2 input two
* @param targetFile output file
* @param x x coordinate point
* @param y y coordinate point
* @return convert success or not
*/
@SuppressLint("DefaultLocale")
public static String[] picInPicVideo(String inputFile1, String inputFile2, int x, int y, String targetFile) {
String reverseVideo = "ffmpeg -i %s -i %s -filter_complex overlay=%d:%d %s";
reverseVideo = String.format(reverseVideo, inputFile1, inputFile2, x, y, targetFile);
return reverseVideo.split(" ");
String pipVideo = "ffmpeg -i %s -i %s -filter_complex overlay=%d:%d %s";
pipVideo = String.format(pipVideo, inputFile1, inputFile2, x, y, targetFile);
return pipVideo.split(" ");
}
/**
* mp4视频的moov往mdat前面移动
* move moov box in the front of mdat box, when moox box is behind mdat box(only mp4)
*
* @param inputFile inputFile
* @param outputFile outputFile
* @return 移动moov命令行
* @return move success or not
*/
public static String[] moveMoovAhead(String inputFile, String outputFile) {
String moovCmd = "ffmpeg -i %s -movflags faststart -acodec copy -vcodec copy %s";
@ -392,10 +389,10 @@ public class FFmpegUtil {
}
/**
* 使用ffprobe探测多媒体格式
* using FFprobe to parse the media format
*
* @param inputFile inputFile
* @return 多媒体格式数据
* @return probe success or not
*/
public static String[] probeFormat(String inputFile) {
//show format:ffprobe -i %s -show_format -print_format json

Write Preview
Loading…
Cancel
Save