我想将OpenGL程序的输出转换为h264并流式传输输出。我在某个地方收集了大部分代码,得到了一个输出文件,但我不知道该怎么做,或者它是否有效。目前,输出仅保存在file.h264文件中。
编辑:“全局”变量。
我从http://svn.gnumonks.org/trunk/21c3-video/cutting_tagging/tools/mpeg4ip-1.2/server/util/rgb2yuv/rgb2yuv.c获取了GRB2YUV函数。
输出结果如下:
在Linux中,file.h264返回数据。
编辑:“全局”变量。
x264_param_t param;
x264_t* encoder;
x264_picture_t pic_in;
x264_picture_t pic_out;
x264_nal_t *headers;
int i_nal;
FILE* pFile;
我的初始化函数:
initX264() {
pFile = fopen("file.h264", "wb");
x264_param_t param;
x264_param_default_preset(¶m, "veryfast", "zerolatency");
param.i_threads = 1;
param.i_width = 1024;
param.i_height = 768;
param.i_fps_num = 30;
param.i_fps_den = 1;
param.i_keyint_max = 30;
param.b_intra_refresh = 1;
param.rc.i_rc_method = X264_RC_CRF;
param.rc.f_rf_constant = 25;
param.rc.f_rf_constant_max = 35;
param.b_annexb = 0;
param.b_repeat_headers = 0;
param.i_log_level = X264_LOG_DEBUG;
x264_param_apply_profile(¶m, "baseline");
encoder = x264_encoder_open(¶m);
x264_picture_alloc(&pic_in, X264_CSP_I420, 1024, 768);
x264_encoder_parameters( encoder, ¶m );
x264_encoder_headers( encoder, &headers, &i_nal );
int size = headers[0].i_payload + headers[1].i_payload + headers[2].i_payload;
fwrite( headers[0].p_payload, 1, size, pFile);
}
以下内容放在 Render 函数中,每秒执行约30次:
GLubyte *data = new GLubyte[3 * 1024 * 768];
GLubyte *PixelYUV = new GLubyte[3 * 1024 * 768];
glReadPixels(0, 0, 1024, 768, GL_RGB, GL_UNSIGNED_BYTE, data);
RGB2YUV(1024, 768, data, PixelYUV, PixelYUV + 1024 * 768, PixelYUV + 1024 * 768 + (1024 * 768) / 4, true);
pic_in.img.plane[0] = PixelYUV;
pic_in.img.plane[1] = PixelYUV + 1024 * 768;
pic_in.img.plane[2] = PixelYUV + 1024 * 768 + (1024 * 768) / 4;
x264_nal_t* nals;
int i_nals;
int frame_size = x264_encoder_encode(encoder, &nals, &i_nals, &pic_in, &pic_out);
if( frame_size )
{
fwrite( (char*)nals[0].p_payload, frame_size, 1, pFile );
}
我从http://svn.gnumonks.org/trunk/21c3-video/cutting_tagging/tools/mpeg4ip-1.2/server/util/rgb2yuv/rgb2yuv.c获取了GRB2YUV函数。
输出结果如下:
x264 [debug]: frame= 0 QP=11.14 NAL=3 Slice:I Poc:0 I:3072 P:0 SKIP:0 size=21133 bytes
x264 [debug]: frame= 1 QP=20.08 NAL=2 Slice:P Poc:2 I:0 P:14 SKIP:3058 size=72 bytes
x264 [debug]: frame= 2 QP=18.66 NAL=2 Slice:P Poc:4 I:0 P:48 SKIP:3024 size=161 bytes
x264 [debug]: frame= 3 QP=18.23 NAL=2 Slice:P Poc:6 I:0 P:84 SKIP:2988 size=293 bytes
在Linux中,file.h264返回数据。