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使用ffmpeg android的Concat视频文件

android-ffmpeg ffmpeg android

Katy Colins · 技术社区 · 8 年前

我在用 ffmpeg-android 要压缩两个视频文件,但压缩时间太长,我猜是因为使用了 "-filter_complex" 但这是我在网上找到的唯一命令,请大家简化一下下面的命令好吗?我只想看两个视频文件 camera2 api,无需任何修改。

 String command[] = new String[]{
                        "-y",
                        "-i", firstPath,
                        "-i", secondPath,
                        "-strict",
                        "experimental",
                        "-filter_complex",
                        "[0:v]scale=iw*min(1920/iw\\,1080/ih):ih*min(1920/iw\\,1080/ih)," +
                                "pad=1920:1080:(1920-iw*min(1920/iw\\,1080/ih))/2:(1080-ih*min(1920/iw\\,1080/ih))/2,setsar=1:1[v0];[1:v] scale=iw*min(1920/iw\\,1080/ih):ih*min(1920/iw\\,1080/ih)," +
                                "pad=1920:1080:(1920-iw*min(1920/iw\\,1080/ih))/2:(1080-ih*min(1920/iw\\,1080/ih))/2,setsar=1:1[v1];[v0][0:a][v1][1:a] concat=n=2:v=1:a=1",
                        "-ab", "48000", "-ac", "2", "-ar", "22050", "-s", "1920x1080", "-vcodec", "libx264", "-crf", "27", "-q", "4", "-preset", "ultrafast", getVideoFilePath(getActivity())};
                commandFFMPEG(command);


 private void commandFFMPEG(String command[]) {
        FFmpeg ffmpeg = FFmpeg.getInstance(getActivity());
        try {
            ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {

                @Override
                public void onStart() {
                    startTime = System.currentTimeMillis();
                }

                @Override
                public void onProgress(String message) {

                }

                @Override
                public void onFailure(String message) {

                }

                @Override
                public void onSuccess(String message) {
                    long endTime = System.currentTimeMillis();
                    long result = endTime - startTime;
                    Toast.makeText(getActivity(), "Videos are merged", Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onFinish() {

                }
            });
        } catch (FFmpegCommandAlreadyRunningException e) {
            // Handle if FFmpeg is already running
        }
    }

1 回复 | 直到 8 年前

H.Taras 8 年前

Idk将帮助您,但当我想用ffmpeg录制视频时,我使用了以下命令:

StringBuilder builder = new StringBuilder();
builder.append("-f ");
builder.append("concat ");
builder.append("-safe 0 ");
builder.append("-i ");
final String tempFile = getTextFile().getAbsolutePath();//it is text file with video files paths
builder.append(tempFile);
builder.append(" ");
builder.append("-c ");
builder.append("copy ");
builder.append(saveFile);// saveFile - it is your output file

无论如何,总持续时间为20秒的连接视频需要约20秒的处理时间。你可以看看 here ,我写它是为了连接几个视频,但代码质量很糟糕,我不知道,你能理解吗。希望它能帮助你)

DILSHAD AHMAD 5 年前

String cmd[]=new String[]{“-y”、“-i”、“vid.mp4”、“i”、“vid2.mp4”、“-preset”、“ultrafast”、“-filter_complex”、“[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1[v][a]、“-map”、[v]、“-map”、[a]、[a]、“/output.mp4”};

这对我有用!
使用的媒体格式:mp4
两个视频大小相同-320x240(必选)

使用ffmpeg-lib:com。writingminds:FFmpegAndroid:0.3.2