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Sur d’autres sites (9490)

  • ffmpeg audio output in iOS

    19 septembre 2015, par user3249421

    Good day,

    I have own project which using iFrameExtraktor (https://github.com/lajos/iFrameExtractor). I modified initWithVideo method to :

    -(id)initWithVideo:(NSString *)moviePath imgView: (UIImageView *)imgView {
    
if (!(self=[super init])) return nil;
    

    
AVCodec         *pCodec;
    
AVCodec         *aCodec;
    

    
// Register all formats and codecs
    
avcodec_register_all();
    
av_register_all();
    

    
imageView = imgView;
    

    
// Open video file
    
if(avformat_open_input(&pFormatCtx, [moviePath cStringUsingEncoding:NSASCIIStringEncoding], NULL, NULL) != 0) {
    
    av_log(NULL, AV_LOG_ERROR, "Couldn't open file\n");
    
    goto initError;
    
}
    

    
// Retrieve stream information
    
if(avformat_find_stream_info(pFormatCtx,NULL) < 0) {
    
    av_log(NULL, AV_LOG_ERROR, "Couldn't find stream information\n");
    
    goto initError;
    
}
    

    
// Find the first video stream
    
if ((videoStream =  av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, &pCodec, 0)) < 0) {
    
    av_log(NULL, AV_LOG_ERROR, "Cannot find a video stream in the input file\n");
    
    goto initError;
    
}
    

    
if((audioStream = av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_AUDIO, -1, -1, &aCodec, 0)) < 0 ){
    
    av_log(NULL, AV_LOG_ERROR, "Cannot find a audio stream in the input file\n");
    
    goto initError;
    
}
    

    
// Get a pointer to the codec context for the video stream
    
pCodecCtx = pFormatCtx->streams[videoStream]->codec;
    
aCodecCtx = pFormatCtx->streams[audioStream]->codec;
    

    
// Find the decoder for the video stream
    
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
    
if(pCodec == NULL) {
    
    av_log(NULL, AV_LOG_ERROR, "Unsupported video codec!\n");
    
    goto initError;
    
}
    

    
aCodec = avcodec_find_decoder(aCodecCtx->codec_id);
    
if(aCodec == NULL) {
    
    av_log(NULL, AV_LOG_ERROR, "Unsupported audio codec!\n");
    
    goto initError;
    
}
    

    
// Open codec
    
if(avcodec_open2(pCodecCtx, pCodec, NULL) < 0) {
    
    av_log(NULL, AV_LOG_ERROR, "Cannot open video decoder\n");
    
    goto initError;
    
}
    

    
if(avcodec_open2(aCodecCtx, aCodec, NULL) < 0){
    
    av_log(NULL, AV_LOG_ERROR, "Cannot open audio decoder\n");
    
    goto initError;
    
}
    

    
// Allocate video frame
    
pFrame = av_frame_alloc();
    

    
outputWidth = pCodecCtx->width;
    
self.outputHeight = pCodecCtx->height;
    

    
lastFrameTime = -1;
    
[self seekTime:0.0];
    

    
return self;
    

    
initError:
    
    //[self release];
    
    return nil;
    
}

    Video rendering works fine, but I don’t know how play audio to device output.

    Thanks for any tips.

  • Revision 730cdefd3e : Add SVC codec control to set frame flags and buffer indices. Add SVC codec cont

    2 septembre 2015, par Marco

    Changed Paths :
     Modify /examples/vp9_spatial_svc_encoder.c


     Modify /vp9/encoder/vp9_svc_layercontext.c


     Modify /vp9/encoder/vp9_svc_layercontext.h


     Modify /vp9/vp9_cx_iface.c


     Modify /vpx/src/svc_encodeframe.c


     Modify /vpx/vp8cx.h



    Add SVC codec control to set frame flags and buffer indices.

    Add SVC codec control to set the frame flags and buffer indices
    for each spatial layer of the current (super)frame to be encoded.
    This allows the application to set (and change on the fly) the
    reference frame configuration for spatial layers.

    Added an example layer pattern (spatial and temporal layers)
    in vp9_spatial_svc_encoder for the bypass_mode using new control.

    Change-Id : I05f941897cae13fb9275b939d11f93941cb73bee

  • Revision eb53c69ece : Add cyclic refresh parameters to svc-layer context. For 1 pass CBR spatial-SVC :

    8 septembre 2015, par Marco

    Changed Paths :
     Modify /examples/vp9_spatial_svc_encoder.c


     Modify /vp9/encoder/vp9_aq_cyclicrefresh.c


     Modify /vp9/encoder/vp9_encoder.c


     Modify /vp9/encoder/vp9_ratectrl.c


     Modify /vp9/encoder/vp9_svc_layercontext.c


     Modify /vp9/encoder/vp9_svc_layercontext.h


     Modify /vpx/svc_context.h



    Add cyclic refresh parameters to svc-layer context.

    For 1 pass CBR spatial-SVC :
    Add cyclic refresh parameters to the svc-layer context.

    This allows cyclic refresh (aq-mode=3) to be applied to
    the whole super-frame (all spatial layers).
    This gives a performance improvement for spatial layer encoding.

    Addd the aq_mode mode on/off setting as command line option.

    Change-Id : Ib9c3b5ba3cb7851bfb8c37d4f911664bef38e165

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