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我的 libH264 应用程序正在对传入的相机数据执行编码，但它会不断累积数据并减慢它执行的更多编码操作。知道为什么会这样吗？

变量在程序开始时分配。我的顺序不正确吗？我怀疑我必须重新初始化一些结构，但我不知道该怎么做......

这是我在相机线程中的部分代码：

    int nWidth = 640;
    int nHeight = 480;

填充 YUV 数据

    memcpy(p264Pic->img.plane[0],pic.buffer,nWidth*nHeight);  
    memcpy(p264Pic->img.plane[1],pic.buffer+nWidth*nHeight,nWidth*nHeight/4);  
    memcpy(p264Pic->img.plane[2],pic.buffer+nWidth*nHeight*5/4,nWidth*nHeight/4);

填写PTS

    p264Pic->i_pts = high_resolution_timer_tick_count();

//          if( nFramsInPack % 8 == 0){
//           p264Pic->i_type = X264_TYPE_I;
//          }else{
             p264Pic->i_type = X264_TYPE_AUTO;
//      }

    if( x264_encoder_encode( p264Handle, &p264Nal, &i264Nal, p264Pic ,&pic_out) < 0 ) {  
                fprintf( stderr, "x264_encoder_encode failed/n" );  
    }  
    printf("i264Nal %d\n", i264Nal );

    for( int i = 0; i < i264Nal; i++ )  
    {
     printf( "nal pass %d\n", i );
     int i_data = 1024*32;  

     printf( "nal encode\n" );

     x264_nal_encode( p264Handle, pNal, &p264Nal[i] );

     printf( "after nal encode\n" );

     int i_size = p264Nal[i].i_payload;     

     printf("i_size %d\n", i_size );

     if( i_size > 0 ) {  

       if ((pNal[4]&0x60)==0) {  
           continue;  
       }  
       if (pNal[4]==0x67) {  
           continue;  
       }  
       if (pNal[4]==0x68) {  
           continue;  
       }  
       memmove(pNal,pNal+4,i_size-4);  
       pNal+=i_size-4;  
     }  
     else if( i_size < 0 ) {  
       fprintf( stderr,"need to increase buffer size (size=%d)/n", -i_size );  
     }  
    }

打包数据到 RTMP

    unsigned int nSize=pNal-szNalBuffer;  
    packet.m_nBodySize=nSize+9;  
    if (i264Nal>1) {  
     szBodyBuffer[ 0]=0x17;  
    }  
    else {  
     szBodyBuffer[ 0]=0x27;  
    }  
    put_be32((char *)szBodyBuffer+5,nSize);  
    memcpy(szBodyBuffer+9,szNalBuffer,pNal-szNalBuffer);  

    printf( "rtmp send packet\n" );

    RTMP_SendPacket(rtmp,&packet,0);  
    newTick=high_resolution_timer_tick_count();  
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;  
    packet.m_nTimeStamp+=newTick-oldTick;  
    oldTick=newTick;

这是我的应用程序的输出：

i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 0
rtmp send packet
i264Nal 4
nal pass 0
nal encode
after nal encode
i_size 36
nal pass 1
nal encode
after nal encode
i_size 15
nal pass 2
nal encode
after nal encode
i_size 632
nal pass 3
nal encode
after nal encode
i_size 7151
rtmp send packet
i264Nal 1
nal pass 0
nal encode
after nal encode
i_size 8136
rtmp send packet
i264Nal 1
nal pass 0
nal encode
after nal encode
i_size 28955
rtmp send packet
^CThe pthread schedule_do end
^Cthread is end
i264Nal 1
nal pass 0
nal encode
after nal encode
4

1 回答 1

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x264_encoder_encode(...)返回帧大小，您似乎没有考虑到这一点。您使用 i_payload 但取决于 NAL 类型，这将不是正确的值。

x264_nal_encode看起来它已被删除，x264_encoder_encode现在返回编码为 nal 单位的帧。 int frame_size被退回。

于 2014-05-08T19:19:57.730 回答