Newest 'ffmpeg' Questions - Stack Overflow

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  • How can I find video rotation and rotate the clip accordingly using moviepy ?

    26 mars 2017, par Gloin

    I'm using moviepy to import some videos, but the videos that should be in portrait mode are imported in landscape. I need to check whether the rotation has been changed, and if it has, rotate it back.

    Is this functionality built into moviepy? If not, how else can I check it?

  • avformat_write_header is not working properly in ffmepg

    26 mars 2017, par ganesh kumar

    I was working on mp4 file creation project using FFMPEG, i tried to convert the stream information of video packet based on FFMPEG muxing,remuxing code, but header get damaged after convert into so file is corrupted.

    /*this code using set the stream information */

    AVFormatContext *input_context,*output_context;
    AVDictionary *opt;
   AVStream *out_stream;
   AVCodecContext *newcontext=NULL;
   out_stream= avformat_new_stream(output_context,NULL);
                newcontext = avcodec_alloc_context3(codec);
                newcontext->codec_id=Output_fmt->video_codec;
                newcontext->bit_rate =in_stream->codec->bit_rate;
                newcontext->width    = in_stream->codec->width;
                newcontext->height   = in_stream->codec->height;
                newcontext->timecode_frame_start=in_stream->codec->timecode_frame_start;
                newcontext->gop_size      = in_stream->codec->gop_size;
                newcontext->profile       =  in_stream->codec->profile;
                newcontext->level         =in_stream->codec->level;
                newcontext->pix_fmt       = PIX_FMT_YUV420P;
                newcontext->frame_size=in_stream->codec->frame_size;
                newcontext->sample_fmt=in_stream->codec->sample_fmt;
                newcontext->sample_rate=in_stream->codec->sample_rate;
                 time_base=  (double)in_stream->time_base.num / (double)in_stream->time_base.den;
                 duration= (double)in_stream->duration * time_base * 1000.0;
                if (!out_stream) {
                    fprintf(stderr, "Failed allocating output stream\n");
                    ret = AVERROR_UNKNOWN;
                    return;
                }
               ret = avcodec_copy_context(out_stream->codec,newcontext);
                if (ret < 0) {
                    fprintf(stderr, "Failed to copy context from input to output stream codec context\n");
                    goto end;
                }
                out_stream->codec->codec_tag = 0;
                if (output_context->oformat->flags & AVFMT_GLOBALHEADER)
                    out_stream->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;

    Changed the Header Information using : /*this code using set the metadata */

    av_dict_set(&opt, "major_brand", "mp42", 0);
    av_dict_set(&opt, "minor_version","512" , 0);
    av_dict_set(&opt, "compatible_brands","isomiso2avc1mp41",0);
    av_dict_set(&opt, "comment","Hash=855738390",0);
    output_context->metadata = opt;
    ret = avformat_write_header(output_context,NULL);

    after create the mp4 file check file using ffmpeg in terminal. getting Error like this:

    /this error message/

    [mpeg4 @ 0x7ff2b9811c00] header damaged Last message repeated 39 times [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7ff2ba800000] decoding for stream 0 failed [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7ff2ba800000] Could not find codec parameters for stream 0 (Video: mpeg4 (mp4v / 0x7634706D), none, 376 kb/s): unspecified size Consider increasing the value for the 'analyzeduration' and 'probesize' options.

  • FFmpeg gives an error while extract MP3 from video

    26 mars 2017, par Urvashi Patel

    I want to execute FFmpeg command for extract audio in MP3 format from video that is in asset folder of the app. For more, refer http://writingminds.github.io/ffmpeg-android-java/

    String sourceFilePath = "file:///android_asset/SampleVideo.mp4";
destFilePath = mp3File.getAbsolutePath();

FFmpeg ffmpeg = FFmpeg.getInstance(MainActivity.this);
    try {

        String cmd[] = new String[]{"/data/data/com.example.bansi_vasundhara.videotomp3_demo/files/ffmpeg", "-i", sourceFilePath, "-vn", "-acodec copy", destFilePath};

        ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {

            @Override
            public void onStart() {
                Log.e("gc", "Command Started");
            }

            @Override
            public void onProgress(String message) {
                Log.e("gc", "onProgress" + message);
            }

            @Override
            public void onFailure(String message) {
                Log.e("gc", "onFailure command" + message);
            }

            @Override
            public void onSuccess(String message) {
                Log.e("gc", "onSuccess command" + message);
            }

            @Override
            public void onFinish() {
                Log.e("gc", "onFinish command");
            }
        });

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

    but I get an error. Please suggest any solution.

    java.io.IOException: Error running exec(). Command: [/data/data/com.example.bansi_vasundhara.videotomp3_demo/files/ffmpeg, /data/data/com.example.bansi_vasundhara.videotomp3_demo/files/ffmpeg, -i, file:///android_asset/SampleVideo.mp4, -vn, -acodec copy, /storage/sdcard0/VideoToMP3/SampleMP3.mp3] Working Directory: null Environment: null at java.lang.ProcessManager.exec(ProcessManager.java:211) at java.lang.Runtime.exec(Runtime.java:173) at java.lang.Runtime.exec(Runtime.java:128) at com.github.hiteshsondhi88.libffmpeg.ShellCommand.run(ShellCommand.java:10) at com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:38) at com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:10) at android.os.AsyncTask$2.call(AsyncTask.java:288) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:818) Caused by: java.io.IOException: No such file or directory at java.lang.ProcessManager.exec(Native Method) at java.lang.ProcessManager.exec(ProcessManager.java:209)

  • Android JavaCV FFmpeg webstream to local static website

    26 mars 2017, par Thomas Devoogdt

    For my integrated test I'm working on an application that needs to provide a live stream to a locally hosted website. I've already built a working site that run's on nanohttpd. This application performs also special image processing. Therefore I use JavaCV. The library is working perfectly and all cpp bindings are working too.

    My question: How to set up a live stream that can directly be played in a static site hosted by nanohttpd? - I am on the right way?

    My code:

    init:

    private void initLiveStream() throws FrameRecorder.Exception {
    /* ~~~ https://github.com/bytedeco/javacv/issues/598 ~~~ */
    frameRecorder = new FFmpegFrameRecorder("http://localhost:9090", imageWidth, imageHeight, 0);
    frameRecorder.setVideoOption("preset", "ultrafast");
    frameRecorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
    frameRecorder.setAudioCodec(0);
    frameRecorder.setPixelFormat(avutil.AV_PIX_FMT_YUV420P);
    frameRecorder.setFormat("webm");
    frameRecorder.setGopSize(10);
    frameRecorder.setFrameRate(frameRate);
    frameRecorder.setVideoBitrate(5000);
    frameRecorder.setOption("content_type","video/webm");
    frameRecorder.setOption("listen", "1");
    frameRecorder.start();
}

    In my CameraView:

    @Override
public void onPreviewFrame(byte[] data, Camera camera) {
    Camera.Size size = camera.getParameters().getPreviewSize();
    Frame frame = new AndroidFrameConverter().convert(data, size.width, size.height);
    try {
         if(frameRecorder!=null){
             frameRecorder.record(frame);
         }
     } catch (FrameRecorder.Exception e) {
         e.printStackTrace();
     }
 }

    Here is one of the stack traces that ar shown frequently in my search to the solution: 

    org.bytedeco.javacv.FrameRecorder$Exception: avio_open error() error -111: Could not open 'http://localhost:9090'

    I couldn't find any other thread addressing this specific issue.

    Thanks in advance

    EDIT

    Thanks to Chester Cobus, Here is my used code:

    Websocket:

    //Constructor
AsyncHttpServer serverStream = new AsyncHttpServer();
List sockets = new ArrayList<>();

//http://stackoverflow.com/a/33021907/5500092
//I'm planning to use more sockets. This is the only uniform expression I found.
serverStream.websocket("/((?:[^/]*/)*)(.*)", new AsyncHttpServer.WebSocketRequestCallback() {
     @Override
     public void onConnected(final WebSocket webSocket, AsyncHttpServerRequest request) {
         String uri = request.getPath();
         if (uri.equals("/live")) {
             sockets.add(webSocket);

             //Use this to clean up any references to your websocket
             webSocket.setClosedCallback(new CompletedCallback() {
                 @Override
                 public void onCompleted(Exception ex) {
                     try {
                         if (ex != null)
                             Log.e("WebSocket", "Error");
                     } finally {
                         sockets.remove(webSocket);
                     }
                 }
             });
         }
     }
});

//Updater (Observer pattern)
@Override
public void updated(byte[] data) {
    for (WebSocket socket : sockets) {
         socket.write(new ByteBufferList(data));
    }
}

    Record Acitivy

    private long start_time = System.currentTimeMillis();

@Override
public void onPreviewFrame(byte[] data, Camera camera) {
    long now_time = System.currentTimeMillis();
    if ((now_time - start_time) > 250) {
        start_time = now_time;
        //https://forums.xamarin.com/discussion/40991/onpreviewframe-issue-converting-preview-byte-to-android-graphics-bitmap
        Camera.Size size = camera.getParameters().getPreviewSize();
        YuvImage image = new YuvImage(data, ImageFormat.NV21, size.width, size.height, null);
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        image.compressToJpeg(new Rect(0, 0, size.width, size.height), 60, byteArrayOutputStream);
        MainActivity.getWebStreamer().updated(byteArrayOutputStream.toByteArray());
    }
}

    JavaScript

    var socket;
var imageElement;

/**
 * path - String.Format("ws://{0}:8090/live", Window.Location.HostName)
 * image - HTMLImageElement
 */
function imageStreamer(path, image) {
    imageElement = image;
    socket = new WebSocket(path);

    socket.onmessage = function(msg) {
        var arrayBuffer = msg.data;
        var reader = new FileReader();
        reader.onload = function(e) {
            imageElement.src = e.target.result;
        };
        reader.readAsDataURL(arrayBuffer);
    };
}

  • What is the best way to merge (concat) mp4 files in android ?

    26 mars 2017, par Glimpse

    I am build an camera app which will allow users to pause & resume recording of an video. Currently pause & resume is possible using MediaRecorder but only for SDK >= 24.

    For version SDK < 24 I am using mediaRecorder.stop() & mediaRecorder.start(). Now I must merge those separate mp4 files into one.

    This is the current approach using FFMPEG (but with no luck):

    private void mergeVideos() {

    if (filePaths.size() == 1) {
        cropVideoToSquare();
        return;
    }

    List cmdList = new ArrayList<>();

    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < filePaths.size(); i++) {
        cmdList.add("-i");
        cmdList.add(filePaths.get(i));

        sb.append("[").append(i).append(":0] [").append(i).append(":1]");
    }
    sb.append(" concat=n=").append(filePaths.size()).append(":v=1:a=1 [v] [a]");
    cmdList.add("-filter_complex");
    cmdList.add("\'" + sb.toString() + "\'");
    cmdList.add("-map");
    cmdList.add("\'[v]\'");
    cmdList.add("-map");
    cmdList.add("\'[a]\'");
    cmdList.add("-preset");
    cmdList.add("ultrafast");
    final String mergedVideoLocation = CameraHelper.generateVideoNameWithPath();
    cmdList.add(mergedVideoLocation);

    sb = new StringBuilder();
    for (String str : cmdList) {
        sb.append(str).append(" ");
    }

    String[] cmd = cmdList.toArray(new String[cmdList.size()]);

    try {
        ffmpeg = FFmpeg.getInstance(this);
        ffmpeg.execute(cmd, new MergingHandler() {
            @Override
            public void onSuccess(String message) {
                Log.d("mergeVideos", "onSuccess");
                currentFilePath = mergedVideoLocation;
                cropVideoToSquare();
            }

            @Override
            public void onFailure(String message) {
                Log.d("mergeVideos", "onFailure: " + message);
                pDialog.dismiss();
            }

            @Override
            public void onStart() {
                Log.d("mergeVideos", "onStart");
                pDialog.show();
            }
        });

    } catch (FFmpegCommandAlreadyRunningException e) {
        e.printStackTrace();
    }

}

    The exception that I am getting:

    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/Pictures/CameraFeatures/VID_20170326_100318.mp4': Metadata: major_brand : 3gp4 minor_version : 0 compatible_brands: isom3gp4 creation_time : 2017-03-26 08:03:24 Duration: 00:00:04.82, start: 0.000000, bitrate: N/A Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 7764 kb/s, 30.02 fps, 30 tbr, 90k tbn, 300 tbc (default) Metadata: rotate : 90 creation_time : 2017-03-26 08:03:24 handler_name : VideoHandle Side data: displaymatrix: rotation of -90.00 degrees Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default) Metadata: creation_time : 2017-03-26 08:03:24 handler_name : SoundHandle /storage/emulated/0/Pictures/CameraFeatures/VID_20170326_100328.mp4: No such file or directory

    Can someone point out what am I doing wrong?

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