libx264 x264_nal_encode溢出
libx264 x264_nal_encode溢出
提问于 2014-05-09 02:51:10
我的libH264应用程序正在对传入的摄像头数据进行编码，但它会不断积累数据，并且执行的编码操作越多，速度就会越慢。你知道为什么会发生这种事吗？
变量是在程序开始时分配的。我的序列是错误的吗？我怀疑我必须重新初始化一些结构，但我找不到怎么做……
以下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); 填充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 );
}
} 将数据打包为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; 以下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回答 1
Stack Overflow用户
发布于 2014-05-09 03:19:58
x264_encoder_encode(...)返回帧大小，您似乎没有考虑到这一点。您使用的是i_payload，但根据NAL类型的不同，这不是正确的值。
x264_nal_encode看起来像是被移除了，x264_encoder_encode现在返回编码到nal单元中的帧。返回int frame_size。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/23550188
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