我正在尝试修改FFMPEG的运动检测部分。我想要做的是扩展搜索空间,这样每当宏块到达帧的最右边时,我需要它仍然将块向左移动,就好像它们是连接的一样(在我的示例视频中,右边缘实际上是左边缘的延续)。有人可以帮我指出我可以在FFMPEG源代码或x265或x264中修改它的位置吗?
我以 here 为例,以H265为例。它有一个motion.cpp
文件,可以很好地指定可能的块大小,如下所示。但是我找不到遍历框架的特定循环。非常感谢帮助。
#define SETUP_SCALE(W, H) \
sizeScale[LUMA_ ## W ## x ## H] = (H * H) >> 4;
SETUP_SCALE(4, 4);
SETUP_SCALE(8, 8);
SETUP_SCALE(8, 4);
SETUP_SCALE(4, 8);
SETUP_SCALE(16, 16);
SETUP_SCALE(16, 8);
SETUP_SCALE(8, 16);
SETUP_SCALE(16, 12);
SETUP_SCALE(12, 16);
SETUP_SCALE(4, 16);
SETUP_SCALE(16, 4);
SETUP_SCALE(32, 32);
SETUP_SCALE(32, 16);
SETUP_SCALE(16, 32);
SETUP_SCALE(32, 24);
SETUP_SCALE(24, 32);
SETUP_SCALE(32, 8);
SETUP_SCALE(8, 32);
SETUP_SCALE(64, 64);
SETUP_SCALE(64, 32);
SETUP_SCALE(32, 64);
SETUP_SCALE(64, 48);
SETUP_SCALE(48, 64);
SETUP_SCALE(64, 16);
SETUP_SCALE(16, 64);
#undef SETUP_SCALE
更新
一种方法(在x265中)是修改边缘扩展区域(已在代码中,在frameFilter.cpp
中),并为最右边和最左边像素填充块。我在这里找到了这段代码。有人可以帮我添加此功能以进行从右到左的扩展吗?
if ((col == 0) | (col == m_frameFilter->m_numCols - 1))
{
// TODO: improve by process on Left or Right only
primitives.extendRowBorder(reconPic->getLumaAddr(m_rowAddr), stride, reconPic->m_picWidth, realH, reconPic->m_lumaMarginX);
if (m_frameFilter->m_param->internalCsp != X265_CSP_I400)
{
primitives.extendRowBorder(reconPic->getCbAddr(m_rowAddr), strideC, reconPic->m_picWidth >> hChromaShift, realH >> vChromaShift, reconPic->m_chromaMarginX);
primitives.extendRowBorder(reconPic->getCrAddr(m_rowAddr), strideC, reconPic->m_picWidth >> hChromaShift, realH >> vChromaShift, reconPic->m_chromaMarginX);
}
}
// Extra Left and Right border on first and last CU
if ((col == 0) | (col == m_frameFilter->m_numCols - 1))
{
copySizeY += lumaMarginX;
copySizeC += chromaMarginX;
}
// First column need extension left padding area and first CU
if (col == 0)
{
pixY -= lumaMarginX;
pixU -= chromaMarginX;
pixV -= chromaMarginX;
}