x264_encoder_encode 运行异常问题

发布于 2021-11-13 01:33:44 字数 4573 浏览 854 评论 3

我的程序采集过来视频数据是UYVY，采用X264编译，视频数据都是实时采集，问题是现在遇到x264_encoder_encode直接抛出异常，通过跟踪代码刚开始接受数据时x264_encoder_encode不会异常但是返回x264_nal_t为null即没有进行编码（通过查询信息知道前面的数据为b-frame时暂时不编码），但是循环几次后x264_encoder_encode就弹出异常：

下面我把编码代码部分贴出来，请高手指点：

x264Encoder::x264Encoder()
{
    _x264_encoder = NULL;
    _quality = 30;
    _has_init = 0;
    _default_width = 720;
    _default_height = 480;
}

x264Encoder::~x264Encoder()
{
}

int x264Encoder::init()
{
    return init_param(_default_width, _default_height);
}

void x264Encoder::unini()
{
    if(_has_init) {
        x264_picture_clean(&_in_pic);
        x264_encoder_close(_x264_encoder);
    }
}

void x264Encoder::set_image_size(int w, int h)
{
    if(w != _default_width || h != _default_height) {
        init_param(w, h);
        _default_width = w;
        _default_height = h;
    }
}

int x264Encoder::init_param(int w, int h)
{
    if(_has_init) {
        x264_picture_clean(&_in_pic);
        x264_encoder_close(_x264_encoder);
    }
    x264_param_default(&_x264_param);

    _x264_param.i_width = w;
    _x264_param.i_height = h;
/*    _x264_param.i_frame_reference = 2;
    _x264_param.analyse.i_subpel_refine = 6;
    _x264_param.rc.i_lookahead = 30;
    _x264_param.rc.i_rc_method = X264_RC_CQP;
    _x264_param.rc.i_qp_constant = 51 - _quality / 2; // (0 <= m_nQuality <= 100)
    */
    _x264_encoder = x264_encoder_open(&_x264_param);
    x264_picture_alloc(&_in_pic,
        X264_CSP_YV12,
        _x264_param.i_width,
        _x264_param.i_height);

    _has_init = 1;
    return (_x264_encoder == NULL ? -1 : 0);
}

int x264Encoder::encode_to_x264(unsigned char* src,
    long len,
    int w,
    int h,
    unsigned char* dest,
    long *dest_len)
{
    int ret = 0;

    set_image_size(w, h);

    _in_pic.img.i_plane = 3;
    _in_pic.img.plane[0] = src;
    _in_pic.img.plane[1] = src + w * h;
    _in_pic.img.plane[2] = (BYTE*)_in_pic.img.plane[1] + w * h / 4;
    _in_pic.img.plane[3] = 0;

    _in_pic.i_type = X264_TYPE_AUTO;
    _in_pic.i_qpplus1 = 0;
    _in_pic.param = &_x264_param;
    _in_pic.i_pts = 0;

    ret = encode(&_in_pic, dest, dest_len);


    return ret;
}

int x264Encoder::encode(x264_picture_t *inpic,
    unsigned char* dest,
    long *dest_len )
{
    x264_picture_t pic_out;
    x264_nal_t *nal;
    int i_nal, i;

    if(x264_encoder_encode(_x264_encoder, &nal, &i_nal, inpic, &pic_out) < 0) {
        return -1;
    }

    *dest_len = 0;

    for( i = 0; i < i_nal; i++ ) {
        memcpy(dest, nal[i].p_payload, nal[i].i_payload);
        dest += nal[i].i_payload;
        *dest_len += nal[i].i_payload;
    }

    return 0;
}