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    13 mai 2011, par

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Sur d’autres sites (11937)

  • how to output a media stream using ffmpeg ?

    26 juin 2017, par Sanduni Wickramasinghe

    I am reading a mpeg4 video stream using ffmpeg. I use some of its properties and do some processes using those properties. What I want is to play the opened video using a player like vlc. And then consequently I need to play the output video after processing in order to check whether there is a latency. Is it possible to give the video to a port. So that I can get the video as a input to the vlc player from the specific port.

    This is my code up to now. I use MV_generation method to extract features from it and to do a comparison from it.

    static int MV_generation(const AVPacket *pkt)
    
{
    
    std::vector<unsigned long="long"> vl = File_read();
    
    std::hash<string> hash1;
    
    std::ios_base::app);
    
    double x_src_val = 0;
    
    double y_src_val = 0;
    
    double x_dst_val = 0;
    
    double y_dst_val = 0;
    

    
    int ret = avcodec_send_packet(video_dec_ctx, pkt);
    
    if (ret &lt; 0) {
    
        //fprintf(stderr, "Error while sending a packet to the decoder: %s\n", av_err2str(ret));
    
        return ret;
    
    }
    
    video_frame_count++;
    
    while (ret >= 0){
    

    
        ret = avcodec_receive_frame(video_dec_ctx, frame);
    
        if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
    
            break;
    
        }
    
        else if (ret &lt; 0) {
    
            return ret;
    
        }
    
        if (ret >= 0) {
    
            AVFrameSideData *sd;
    
            sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);
    

    
            if (sd) {
    

    
                const AVMotionVector *mvs = (const AVMotionVector *)sd->data;
    

    
                int size_sd = sd->size;
    
                //outData &lt;&lt; size_sd &lt;&lt; endl;
    

    
                string str = "", str1, str2, str3, str4;
    
                for (int i = 0; i &lt; size_sd / sizeof(*mvs); i++) {
    
                    const AVMotionVector *mv = &amp;mvs[i];
    

    
                    int x_src = mv->src_x;
    
                    int y_src = mv->src_y;
    
                    int x_dst = mv->dst_x;
    
                    int y_dst = mv->dst_y;
    

    

    
                    if (x_src != x_dst || y_src != y_dst || x_src > 100 || y_src > 100 || x_dst > 100 || y_dst > 100){
    
                        str1 = to_string(x_src);
    
                        str2 = to_string(y_src);
    
                        str3 = to_string(x_dst);
    
                        str4 = to_string(y_dst);
    

    
                        str = str.append(str1).append(str2).append(str3).append(str4);
    
                    }
    
                }
    

    
                for (unsigned long long y : vl)
    
                {
    
                    // Check if any of the numbers are equal to x
    
                    if (hash1(str) == y)
    
                    {
    
                        cout &lt;&lt; "matched frame_no : " &lt;&lt; video_frame_count &lt;&lt; endl;
    
                    }
    
                }
    
            }
    
            av_frame_unref(frame);
    
        }
    
    }
    
    outData.close();
    
    return 0;
    
}
    
</string></unsigned>

  • Record video with Media Recorder in WEBM format

    21 mai 2017, par Matho

    I need to record two videos via media recorder and process them with ffmpeg in Android. I want to read videos via pipe in ffmpeg command string. From what I have read, I could not use 3GPP/MP4 format, because these formats contains header at the end of video. Because of it, I want to use WEBM video format, but my app is crashing, when I use webm/vp8 setting in media recorder. Ffmpeg I’m using is : com.writingminds:FFmpegAndroid:0.3.2. Could you help me please ?

    RecorderPrepareTask :

    class RecorderPrepareTask extends AsyncTask {
    
private Context mContext;
    

    
public RecorderPrepareTask(Context context) {
    
    mContext = context;
    
}
    

    
@Override
    
protected Boolean doInBackground(Void... voids) {
    
    Timber.d("Starting screen recording...");
    

    
    if (!outputRoot.exists() &amp;&amp; !outputRoot.mkdirs()) {
    
        Timber.e("Unable to create output directory '%s'.", outputRoot.getAbsolutePath());
    
        return false;
    
    }
    

    
    recorder = new MediaRecorder();
    
    recorder.setVideoSource(SURFACE);
    
    recorder.setOutputFormat(MediaRecorder.OutputFormat.WEBM);
    
    recorder.setVideoEncoder(MediaRecorder.VideoEncoder.VP8);
    
    recorder.setVideoSize(Config.VIDEO_SIZE_W, Config.VIDEO_SIZE_H);
    
    recorder.setVideoFrameRate(Config.FRAME_RATE);
    

    
    Timber.i("Output file '%s'.", outputFileName);
    
    recorder.setOutputFile(RecordingActivity.pipe[1].getFileDescriptor());
    

    

    
    try {
    
        recorder.prepare();
    
    } catch (IOException e) {
    
        throw new RuntimeException("Unable to prepare MediaRecorder.", e);
    
    }
    

    

    
    projection = projectionManager.getMediaProjection(resultCode, data);
    

    
    Surface surface = recorder.getSurface();
    
    display = projection.createVirtualDisplay(DISPLAY_NAME, Config.VIDEO_SIZE_W, Config.VIDEO_SIZE_H, 560, VIRTUAL_DISPLAY_FLAG_PRESENTATION, surface, null, null);
    

    
    recorder.start();
    

    
    return true;
    
}
    

    
@Override
    
protected void onPostExecute(Boolean result) {
    

    
}

    }

    getConvertCmd :

    private String getConvertCmd(){
    
    return "-re -r 30 -f webm -c:v vp8 -i pipe:"+ RecordingActivity.pipe[0].getFd() + " -threads 2 -preset ultrafast -profile:v main -level 3.1 -b:v 440k -ar 44100 -ab 128k -s "+ Config.CAMERA_VIDEO_SIZE_W + "x" + Config.CAMERA_VIDEO_SIZE_H + " -vcodec vp8 -acodec vorbis " + outputFileName3;
    
}

    Logs :

    D/SoftVPXEncoder: VP8: internalSetAndroidVp8Params. BRMode: 0. TS: 0. KF: 24. QP: 0 - 0 BR0: 100. BR1: 0. BR2: 0
    
I/ACodec: setupVideoEncoder succeeded
    
E/OMXNodeInstance: setConfig(1a:google.vp8.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
    
I/ACodec: codec does not support config priority (err -2147483648)
    
W/ACodec: do not know color format 0x7f000789 = 2130708361
    
I/SoftMPEG4Encoder: Construct SoftMPEG4Encoder
    
I/MediaCodec: MediaCodec will operate in async mode
    
E/OMXNodeInstance: getParameter(1b:google.mpeg4.encoder, ParamVideoErrorCorrection(0x6000007)) ERROR: NotImplemented(0x80001006)
    
I/ACodec: setupVideoEncoder succeeded
    
E/OMXNodeInstance: setConfig(1b:google.mpeg4.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
    
I/ACodec: codec does not support config priority (err -2147483648)
    
D/SoftVPXEncoder: VP8: initEncoder. BRMode: 0. TSLayers: 0. KF: 24. QP: 0 - 0
    
I/AudioFlinger: AudioFlinger's thread 0xb2440000 ready to run
    
xW/AudioFlinger: acquireAudioSessionId() unknown client 10079 for session 7
    
I/MediaCodec: MediaCodec will operate in async mode
    
/system_process I/DisplayManagerService: Display device added: DisplayDeviceInfo{"RMR": uniqueId="virtual:sk.matho.rocket_monkeys.rocketmonkeysrecorder,10052,RMR,0", 480 x 640, modeId 6, defaultModeId 6, supportedModes [{id=6, width=480, height=640, fps=60.0}], density 560, 560.0 x 560.0 dpi, appVsyncOff 0, presDeadline 16666666, touch NONE, rotation 0, type VIRTUAL, state ON, owner sk.matho.rocket_monkeys.rocketmonkeysrecorder (uid 10052), FLAG_PRIVATE, FLAG_PRESENTATION}
    
E/OMXNodeInstance: setConfig(1c:google.amrnb.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
    
I/ACodec: codec does not support config priority (err -2147483648)
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x10003 imply creation of host color buffer
    
I/MediaCodecSource: MediaCodecSource (video) starting
    
I/MediaCodecSource: MediaCodecSource (video) started
    
D/MPEG4Writer: Video track stopping
    
E/MPEG4Writer: Stop() called but track is not started
    
D/MPEG4Writer: Audio track stopping
    
E/MPEG4Writer: Stop() called but track is not started
    

    
[ 05-21 13:03:44.101  9757: 9766 D/         ]
    
HostConnection::get() New Host Connection established 0xb344f140, tid 9766
    
/sk.matho.rocket_monkeys.rocketmonkeysrecorder E/MediaRecorder: start failed: -2147483648                                                                                                  
    
/sk.matho.rocket_monkeys.rocketmonkeysrecorder E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #2
    
Process: sk.matho.rocket_monkeys.rocketmonkeysrecorder, PID: 10079
    
java.lang.RuntimeException: An error occurred while executing doInBackground()
    
at android.os.AsyncTask$3.done(AsyncTask.java:309)
    
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
    
at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
    
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
    
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
    
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
    
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
    
at java.lang.Thread.run(Thread.java:818)
    
Caused by: java.lang.RuntimeException: start failed.
    
at android.media.MediaRecorder.start(Native Method)
    
at sk.matho.rocket_monkeys.rocketmonkeysrecorder.recording.CameraRecordingSession$MediaPrepareTask.doInBackground(CameraRecordingSession.java:181)
    
at sk.matho.rocket_monkeys.rocketmonkeysrecorder.recording.CameraRecordingSession$MediaPrepareTask.doInBackground(CameraRecordingSession.java:173)
    
at android.os.AsyncTask$2.call(AsyncTask.java:295)
    
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
    
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
    
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
    
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
    
at java.lang.Thread.run(Thread.java:818) 
    

    
[ 05-21 13:03:44.109  9757:10315 D/         ]
    
HostConnection::get() New Host Connection established 0xb307c1c0, tid 10315

  • Record video with Media Recorder in WEBM format

    21 mai 2017, par Matho

    I need to record two videos via media recorder and process them with ffmpeg in Android. I want to read videos via pipe in ffmpeg command string. From what I have read, I could not use 3GPP/MP4 format, because these formats contains header at the end of video. Because of it, I want to use WEBM video format, but my app is crashing, when I use webm/vp8 setting in media recorder. Ffmpeg I’m using is : com.writingminds:FFmpegAndroid:0.3.2. Could you help me please ?

    RecorderPrepareTask :

    class RecorderPrepareTask extends AsyncTask {
    
private Context mContext;
    

    
public RecorderPrepareTask(Context context) {
    
    mContext = context;
    
}
    

    
@Override
    
protected Boolean doInBackground(Void... voids) {
    
    Timber.d("Starting screen recording...");
    

    
    if (!outputRoot.exists() &amp;&amp; !outputRoot.mkdirs()) {
    
        Timber.e("Unable to create output directory '%s'.", outputRoot.getAbsolutePath());
    
        return false;
    
    }
    

    
    recorder = new MediaRecorder();
    
    recorder.setVideoSource(SURFACE);
    
    recorder.setOutputFormat(MediaRecorder.OutputFormat.WEBM);
    
    recorder.setVideoEncoder(MediaRecorder.VideoEncoder.VP8);
    
    recorder.setVideoSize(Config.VIDEO_SIZE_W, Config.VIDEO_SIZE_H);
    
    recorder.setVideoFrameRate(Config.FRAME_RATE);
    

    
    Timber.i("Output file '%s'.", outputFileName);
    
    recorder.setOutputFile(RecordingActivity.pipe[1].getFileDescriptor());
    

    

    
    try {
    
        recorder.prepare();
    
    } catch (IOException e) {
    
        throw new RuntimeException("Unable to prepare MediaRecorder.", e);
    
    }
    

    

    
    projection = projectionManager.getMediaProjection(resultCode, data);
    

    
    Surface surface = recorder.getSurface();
    
    display = projection.createVirtualDisplay(DISPLAY_NAME, Config.VIDEO_SIZE_W, Config.VIDEO_SIZE_H, 560, VIRTUAL_DISPLAY_FLAG_PRESENTATION, surface, null, null);
    

    
    recorder.start();
    

    
    return true;
    
}
    

    
@Override
    
protected void onPostExecute(Boolean result) {
    

    
}

    }

    getConvertCmd :

    private String getConvertCmd(){
    
    return "-re -r 30 -f webm -c:v vp8 -i pipe:"+ RecordingActivity.pipe[0].getFd() + " -threads 2 -preset ultrafast -profile:v main -level 3.1 -b:v 440k -ar 44100 -ab 128k -s "+ Config.CAMERA_VIDEO_SIZE_W + "x" + Config.CAMERA_VIDEO_SIZE_H + " -vcodec vp8 -acodec vorbis " + outputFileName3;
    
}

    Logs :

    D/SoftVPXEncoder: VP8: internalSetAndroidVp8Params. BRMode: 0. TS: 0. KF: 24. QP: 0 - 0 BR0: 100. BR1: 0. BR2: 0
    
I/ACodec: setupVideoEncoder succeeded
    
E/OMXNodeInstance: setConfig(1a:google.vp8.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
    
I/ACodec: codec does not support config priority (err -2147483648)
    
W/ACodec: do not know color format 0x7f000789 = 2130708361
    
I/SoftMPEG4Encoder: Construct SoftMPEG4Encoder
    
I/MediaCodec: MediaCodec will operate in async mode
    
E/OMXNodeInstance: getParameter(1b:google.mpeg4.encoder, ParamVideoErrorCorrection(0x6000007)) ERROR: NotImplemented(0x80001006)
    
I/ACodec: setupVideoEncoder succeeded
    
E/OMXNodeInstance: setConfig(1b:google.mpeg4.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
    
I/ACodec: codec does not support config priority (err -2147483648)
    
D/SoftVPXEncoder: VP8: initEncoder. BRMode: 0. TSLayers: 0. KF: 24. QP: 0 - 0
    
I/AudioFlinger: AudioFlinger's thread 0xb2440000 ready to run
    
xW/AudioFlinger: acquireAudioSessionId() unknown client 10079 for session 7
    
I/MediaCodec: MediaCodec will operate in async mode
    
/system_process I/DisplayManagerService: Display device added: DisplayDeviceInfo{"RMR": uniqueId="virtual:sk.matho.rocket_monkeys.rocketmonkeysrecorder,10052,RMR,0", 480 x 640, modeId 6, defaultModeId 6, supportedModes [{id=6, width=480, height=640, fps=60.0}], density 560, 560.0 x 560.0 dpi, appVsyncOff 0, presDeadline 16666666, touch NONE, rotation 0, type VIRTUAL, state ON, owner sk.matho.rocket_monkeys.rocketmonkeysrecorder (uid 10052), FLAG_PRIVATE, FLAG_PRESENTATION}
    
E/OMXNodeInstance: setConfig(1c:google.amrnb.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
    
I/ACodec: codec does not support config priority (err -2147483648)
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
E/WebmElement: mmap64 failed; errno = 22
    
E/WebmElement: fd 18; flags: 1
    
D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x10003 imply creation of host color buffer
    
I/MediaCodecSource: MediaCodecSource (video) starting
    
I/MediaCodecSource: MediaCodecSource (video) started
    
D/MPEG4Writer: Video track stopping
    
E/MPEG4Writer: Stop() called but track is not started
    
D/MPEG4Writer: Audio track stopping
    
E/MPEG4Writer: Stop() called but track is not started
    

    
[ 05-21 13:03:44.101  9757: 9766 D/         ]
    
HostConnection::get() New Host Connection established 0xb344f140, tid 9766
    
/sk.matho.rocket_monkeys.rocketmonkeysrecorder E/MediaRecorder: start failed: -2147483648                                                                                                  
    
/sk.matho.rocket_monkeys.rocketmonkeysrecorder E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #2
    
Process: sk.matho.rocket_monkeys.rocketmonkeysrecorder, PID: 10079
    
java.lang.RuntimeException: An error occurred while executing doInBackground()
    
at android.os.AsyncTask$3.done(AsyncTask.java:309)
    
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
    
at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
    
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
    
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
    
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
    
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
    
at java.lang.Thread.run(Thread.java:818)
    
Caused by: java.lang.RuntimeException: start failed.
    
at android.media.MediaRecorder.start(Native Method)
    
at sk.matho.rocket_monkeys.rocketmonkeysrecorder.recording.CameraRecordingSession$MediaPrepareTask.doInBackground(CameraRecordingSession.java:181)
    
at sk.matho.rocket_monkeys.rocketmonkeysrecorder.recording.CameraRecordingSession$MediaPrepareTask.doInBackground(CameraRecordingSession.java:173)
    
at android.os.AsyncTask$2.call(AsyncTask.java:295)
    
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
    
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
    
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
    
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
    
at java.lang.Thread.run(Thread.java:818) 
    

    
[ 05-21 13:03:44.109  9757:10315 D/         ]
    
HostConnection::get() New Host Connection established 0xb307c1c0, tid 10315

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