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  • libavfilter/vf_dnn_detect : Add yolo support

    21 novembre 2023, par Wenbin Chen
    libavfilter/vf_dnn_detect : Add yolo support

    Add yolo support. Yolo model doesn't output final result. It outputs
    
candidate boxes, so we need post-process to remove overlap boxes to
    
get final results. Also, the box's coordinators relate to cell and
    
anchors, so we need these information to calculate boxes as well.
    

    Model detail please refer to : https://github.com/openvinotoolkit/open_model_zoo/tree/master/models/public/yolo-v2-tf
    

    Signed-off-by : Wenbin Chen <wenbin.chen@intel.com>
    
Reviewed-by : Guo Yejun <yejun.guo@intel.com>
    • [DH] libavfilter/dnn/dnn_backend_openvino.c
    • [DH] libavfilter/vf_dnn_detect.c

  • Merge commit ’8000206abcc82491c2a8c71e494c5477ede7264c’

    22 juillet 2013, par Michael Niedermayer
    Merge commit ’8000206abcc82491c2a8c71e494c5477ede7264c’

    * commit ’8000206abcc82491c2a8c71e494c5477ede7264c’ :
    
  libspeexdec : fix detection of final terminator code
    

    See : f3c9d66bafde9b8586bd63dd3307daa87352af75
    
Merged-by : Michael Niedermayer <michaelni@gmx.at>

  • MediaMetadataRetriever setDataSource failed : status = 0xFFFFFFED

    22 février 2016, par darja

    I need to fetch frames from video located in the web. That’s how I do this :

    class PlayerWrapper {
    
    private static final MediaMetadataRetriever mMediaMetadataRetriever = new MediaMetadataRetriever();
    

    
    …
    

    
    public void initPlayback(final Context context, final VideoSurfaceView videoSurface, final String url) {
    
        new Thread(new Runnable() {
    
            @Override
    
            public void run() {
    
                …
    

    
                try {
    
                    mMediaMetadataRetriever.setDataSource(url, new HashMap());
    
                } catch (Exception e) {
    
                    DPLog(e);
    
                }
    

    
            }
    
        }).start();
    
    }
    

    
    public Bitmap getFrameAt(int positionMillis) {
    
        if (mMediaMetadataRetriever != null) {
    
            DPLog.d("Creating frame for position [%s]", positionMillis);
    
            try {
    
                return mMediaMetadataRetriever.getFrameAtTime(positionMillis * 1000);
    
            } catch (Exception e) {
    
                …
    
                return null;
    
            }
    
        } else {
    
            return null;
    
        }
    
    }
    
}

    This works fine on several devices with Android 4.4, 5 and 6. But on one device with Android 4.1.2 setDataSource function fails with following stack trace :

    java.lang.RuntimeException: setDataSource failed: status = 0xFFFFFFED
    
       at android.media.MediaMetadataRetriever._setDataSource(MediaMetadataRetriever.java)
    
       at android.media.MediaMetadataRetriever.setDataSource(MediaMetadataRetriever.java:99)
    
       at co.unreel.videoapp.playback.UnreelPlayer$3.run(UnreelPlayer.java:138)
    
       at java.lang.Thread.run(Thread.java:856)

    Also tried this code on emulator, got almost the same but with status 0x80000000

    Url is got from YouTube API, looks like this :

    https://r2---sn-n3toxu-axqe.googlevideo.com/videoplayback?gcr=ru&amp;sver=3&amp;mm=31&amp;mn=sn-n3toxu-axqe&amp;key=yt6&amp;signature=D1CE7B8615F3D96A58A9D2679057D676E7777E05.5A318AD8C5F48FCED2D1A9149348CD269F466FA9&amp;mt=1456173450&amp;pl=24&amp;mv=m&amp;ms=au&amp;lmt=1455616987173757&amp;itag=22&amp;requiressl=yes&amp;ip=188.242.217.203&amp;source=youtube&amp;dur=848.248&amp;id=o-ABIn_CbRwqIO6qpvlaWe_ekyTZPLVd0w_eM80awd6uRQ&amp;fexp=9408087%2C9416126%2C9419451%2C9420452%2C9421340%2C9422596%2C9423661%2C9423662%2C9425078%2C9425963%2C9427767%2C9427801%2C9428013%2C9428432%2C9428660%2C9429602&amp;mime=video%2Fmp4&amp;upn=P5qxGGbPoc0&amp;sparams=dur%2Cgcr%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cupn%2Cexpire&amp;expire=1456195127&amp;initcwndbps=3140000&amp;ratebypass=yes&amp;ipbits=0

    Permissions :

    Why this can happen and what to do ?

    I also tried to use FFmpegMediaMetadataRetriever with the same logic, but it doesn’t work at all, setDataSource causes exceptions with status 0xFFFFFFFF on all devices. As I found on SO, that means that url is invalid, but it is ok and played by MediaPlayer without any issues. Also I found that ffmpeg has issues with urls longer than 1024, but that’s not my case too.

    May be there are another way to get frames from video ?

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