x264编码器设置 | 易学教程

1、


JNIEXPORT void JNICALL Java_com_dongnaoedu_live_jni_PushNative_setVideoOptions
        (JNIEnv *env, jobject jobj, jint width, jint height, jint bitrate, jint fps){
    x264_param_t param;
    //x264_param_default_preset 设置
    x264_param_default_preset(&param,"ultrafast","zerolatency");
    //编码输入的像素格式YUV420P
    param.i_csp = X264_CSP_I420;
    param.i_width  = width;
    param.i_height = height;

    y_len = width * height;
    u_len = y_len / 4;
    v_len = u_len;

    //参数i_rc_method表示码率控制，CQP(恒定质量)，CRF(恒定码率)，ABR(平均码率)
    //恒定码率，会尽量控制在固定码率
    param.rc.i_rc_method = X264_RC_CRF;
    param.rc.i_bitrate = bitrate / 1000; //* 码率(比特率,单位Kbps)
    param.rc.i_vbv_max_bitrate = bitrate / 1000 * 1.2; //瞬时最大码率

    //码率控制不通过timebase和timestamp，而是fps
    param.b_vfr_input = 0;
    param.i_fps_num = fps; //* 帧率分子
    param.i_fps_den = 1; //* 帧率分母
    param.i_timebase_den = param.i_fps_num;
    param.i_timebase_num = param.i_fps_den;
    param.i_threads = 1;//并行编码线程数量，0默认为多线程

    //是否把SPS和PPS放入每一个关键帧
    //SPS Sequence Parameter Set 序列参数集，PPS Picture Parameter Set 图像参数集
    //为了提高图像的纠错能力
    param.b_repeat_headers = 1;
    //设置Level级别
    param.i_level_idc = 51;
    //设置Profile档次
    //baseline级别，没有B帧
    x264_param_apply_profile(&param,"baseline");

    //x264_picture_t（输入图像）初始化
    x264_picture_alloc(&pic_in, param.i_csp, param.i_width, param.i_height);

    //打开编码器
    video_encode_handle = x264_encoder_open(&param);
    if(video_encode_handle){
        LOGI("打开编码器成功...");
    }
}

2、cmaklists编译

cmake_minimum_required(VERSION 3.4.1)


find_library(
        log-lib
        log )

include_directories(
        src/main/jni/faac/include)
include_directories(
        src/main/jni/rtmpdump/include)
include_directories(
        src/main/jni/x264/include)

include_directories(
        src/main/jni)

set(distribution_DIR ../../../../src/main/jni)
add_library(faac
        STATIC
        IMPORTED)
set_target_properties(faac
        PROPERTIES IMPORTED_LOCATION
        ${distribution_DIR}/faac/libfaac.a)

add_library(rtmp
        STATIC
        IMPORTED)
set_target_properties(rtmp
        PROPERTIES IMPORTED_LOCATION
        ${distribution_DIR}/rtmpdump/librtmp.a)

add_library(x264
        STATIC
        IMPORTED)
set_target_properties(x264
        PROPERTIES IMPORTED_LOCATION
        ${distribution_DIR}/x264/libx264.a)

add_library(
        live
        SHARED
        src/main/jni/dn_live.c
        src/main/jni/queue.c)

target_link_libraries(
        live
        x264
        faac
        rtmp
        android
        ${log-lib}
        ${jnigraphics-lib})

来源：CSDN

作者：nicolelili1

链接：https://blog.csdn.net/nicolelili1/article/details/103556213

标签

x264

param