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Sur d’autres sites (11303)

  • Revision 6ce718eb18 : Merge "End of orientation zero group experiment" into experimental

    22 avril 2013, par Deb Mukherjee

    Changed Paths : Modify /vp9/decoder/vp9_decodframe.c Modify /vp9/encoder/vp9_encodemb.c Modify /vp9/encoder/vp9_rdopt.c Merge "End of orientation zero group experiment" into experimental

  • how to fetch raw YUV420p camera data

    10 juin 2014, par 谢小进

    I don’t know which value to use to fetch raw YUV420p data. code below first :

    AVCaptureVideoDataOutput *output = [[AVCaptureVideoDataOutput alloc] init];
    
output.alwaysDiscardsLateVideoFrames = YES;
    
output.videoSettings = @{(id)kCVPixelBufferPixelFormatTypeKey: [NSNumber numberWithUnsignedInt:kCVPixelFormatType_420YpCbCr8BiPlanarFullRange]};
    
//output.videoSettings = @{(id)kCVPixelBufferPixelFormatTypeKey: [NSNumber numberWithUnsignedInt:kCVPixelFormatType_32BGRA]};
    

    
dispatch_queue_t queue;
    
queue = dispatch_queue_create("CameraQueue", NULL);
    
[output setSampleBufferDelegate:self queue:queue];
    

    
[session addOutput:output];

    I noticed that kCVPixelFormatType has some values, does somebody know which value is right to fetch raw YUV420p data ?

    kCVPixelFormatType_420YpCbCr8Planar
    
kCVPixelFormatType_420YpCbCr8PlanarFullRange
    
kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange
    
kCVPixelFormatType_420YpCbCr8BiPlanarFullRange

    can be one of them ?

  • FFMPEG with VP9 + RTSP

    4 janvier 2021, par Jim Jin

    When we use HEVC + RTSP, ffmpeg works fine. The stream is captured by webcam.

    


    ffmpeg -f dshow -rtbufsize 100M  -f vfwcap -i "0" -strict experimental -c:v hevc_qsv -f rtsp -rtsp_transport tcp rtsp://127.0.0.1/live/test


    


    The output is like :

    


    frame=  355 fps= 37 q=-0.0 size=N/A time=00:00:11.27 bitrate=N/A dup=159 drop=0 speed=1.18x


    


    Then we switch to VP9 + RTSP.

    


    ffmpeg -f dshow -rtbufsize 100M  -f vfwcap -i "0" -strict experimental -c:v libvpx-vp9 -f rtsp -rtsp_transport tcp rtsp://127.0.0.1/live/test


    


    The fps and speed looks too slow :

    


    frame=  263 fps=9.5 q=0.0 size=N/A time=00:00:07.94 bitrate=N/A dup=119 drop=0 speed=0.288x


    


    Then we use ffplay to play the stream. There are a lot of error messages and the video seems frozen.

    


    [vp9 @ 000001c3da86c200] Not all references are available
[vp9 @ 000001c3dffd5700] Not all references are available
[vp9 @ 000001c3da8477c0] Not all references are available
[vp9 @ 000001c3da848240] Not all references are available
[vp9 @ 000001c3da848e40] Not all references are available
[vp9 @ 000001c3e01d2fc0] Not all references are available
[vp9 @ 000001c3e01dd280] Not all references are available
[vp9 @ 000001c3e01e8980] Not all references are available
[vp9 @ 000001c3e01f1880] Not all references are available
[vp9 @ 000001c3da86c200] Not all references are available
[vp9 @ 000001c3dffd5700] Not all references are available
[vp9 @ 000001c3da8477c0] Not all references are available
[vp9 @ 000001c3da848240] Not all references are available
[vp9 @ 000001c3da848e40] Not all references are available
[vp9 @ 000001c3e01d2fc0] Not all references are available
[vp9 @ 000001c3e01dd280] Not all references are available0B f=0/0
[vp9 @ 000001c3e01e8980] Not all references are available
[vp9 @ 000001c3e01f1880] Not all references are available
[vp9 @ 000001c3da86c200] Not all references are available
[vp9 @ 000001c3dffd5700] Not all references are available
[vp9 @ 000001c3da8477c0] Not all references are available
[vp9 @ 000001c3da848240] Not all references are available
[vp9 @ 000001c3da848e40] Not all references are available
[vp9 @ 000001c3e01d2fc0] Not all references are available
[vp9 @ 000001c3e01dd280] Not all references are available
[vp9 @ 000001c3e01e8980] Not all references are available
[vp9 @ 000001c3e01f1880] Not all references are available


    


    Finally, we try hardware VP9 encoder.

    


    ffmpeg -f dshow -rtbufsize 100M  -f vfwcap -i "0" -strict experimental -c:v vp9_qsv -f rtsp -rtsp_transport tcp rtsp://127.0.0.1/live/test


    


    It can't work.

    


    [swscaler @ 0000021e88df9fc0] deprecated pixel format used, make sure you did set range correctly
[vp9_qsv @ 0000021e8687df80] Selected ratecontrol mode is unsupported
[vp9_qsv @ 0000021e8687df80] Low power mode is unsupported
[vp9_qsv @ 0000021e8687df80] Current frame rate is unsupported
[vp9_qsv @ 0000021e8687df80] Current picture structure is unsupported
[vp9_qsv @ 0000021e8687df80] Current resolution is unsupported
[vp9_qsv @ 0000021e8687df80] Current pixel format is unsupported
[vp9_qsv @ 0000021e8687df80] some encoding parameters are not supported by the QSV runtime. Please double check the input parameters.
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!


    


    So, how can we deal with VP9 + RTSP successfully ?

    


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