本地直播推流
功能简介 : 用于多个主播实时连麦互动。技术实现上，我们会把房间里多个主播的音视频在服务器合成一路流后推流到CDN流媒体服务器，直播观众可以获取RTMP或HLS流观看直播。
互动直播的流程如下:
1.创建混图器
直播时，可以根据业务需要，选择不同的录制布局。如下代码为创建左右布局的相关示例。
- 设置混图器配置
//混图器参数配置
MixerCfg* mixerCfg = [[MixerCfg alloc]init];
mixerCfg.fps = 15;
mixerCfg.dstResolution = CGSizeMake(848,480);
- 设置混图器内容
// 图像内容集合 - 创建左右布局的摄像头录制内容，
NSMutableArray<RecContentItem *> *contents = [NSMutableArray array];
//获取left（自己）用户id
NSString *myUserID = [[CloudroomVideoMeeting shareInstance] getMyUserID];
//获取c摄像头id
short camID = [[CloudroomVideoMeeting shareInstance] getDefaultVideo:myUserID];
//自己的摄像头（左边布局）, 设置摄像头录制视频大小，由于左右布局， 宽度只有录制布局的一半
CGRect leftRect = CGRectMake(0, 0, mixerCfg.dstResolution.width/2, mixerCfg.dstResolution.height);
// 添加到内容列表
RecVideoContentItem *leftVideoItem = [[RecVideoContentItem alloc] initWithRect:leftRect userID:myUserID camID:camID];
[contents addObject:leftVideoItem];
//其他人的摄像头（右边布局）
CGRect rightRect = CGRectMake(mixerCfg.dstResolution.width/2, 0, mixerCfg.dstResolution.width/2, mixerCfg.dstResolution.height);
//此处otherUserID在进入用户进入会议时候可以保存，或者使用getAllMembers获取所有成员信息，找出对方id.
NSString *otherUserID = @"";
NSMutableArray <MemberInfo *> * allMemberInfo = [[CloudroomVideoMeeting shareInstance] getAllMembers];
for (MemberInfo *memberInfo in allMemberInfo) {
if(![memberInfo.userId isEqualToString:myUserID])
{
otherUserID = memberInfo.userId;
break;
}
}
short otherCamID = [[CloudroomVideoMeeting shareInstance] getDefaultVideo:otherUserID];
RecVideoContentItem* rightVideoItem = [[RecVideoContentItem alloc] initWithRect:rightRect userID:otherUserID camID:otherCamID];
// 添加到内容列表
[contents addObject:rightVideoItem];
MixerContent *recContent = [[MixerContent alloc]init];
recContent.contents = [contents copy];
- 创建混图器
// 创建混图器, 设置混图器编号为1
CRVIDEOSDK_ERR_DEF rslt = [[CloudroomVideoMeeting shareInstance] createLocMixer:@"1" cfg:mixerCfg content:recContent];
if(rslt == CRVIDEOSDK_NOERR)
{
//创建成功
}
相关API请参考:
相关结构定义请参考：
2.添加直播推流
NSMutableArray<OutputCfg*> *outputCfgs = [NSMutableArray array];
// A直播平台
OutputCfg* outputCfgA = [[OutputCfg alloc]init];
[outputCfgA setType:OUT_LIVE];
[outputCfgA setLiveUrl:@"rtmp://A/xxx"];
//添加配置A
[outputCfgs addObject:outputCfgA];
// B直播平台
OutputCfg* outputCfgB = [[OutputCfg alloc]init];
[outputCfgB setType:OUT_LIVE];
[outputCfgB setLiveUrl:@"rtmp://B/xxx"];
//添加配置B
[outputCfgs addObject:outputCfgB];
NSMutableDictionary<NSString*,MixerOutput*> *outputDic = [NSMutableDictionary dictionary];
MixerOutput* output = [[MixerOutput alloc]init];
output.outputs = outputCfgs;
[outputDic setObject:output forKey:_mixerID];
[[CloudroomVideoMeeting shareInstance] addLocMixer:@"1" outputs:output];
相关API请参考:
3.直播推流事件处理
-(void)locMixerOutputInfo:(NSString*)mixerID nameUrl:(NSString*)nameUrl outputInfo:(OutputInfo*)outputInfo
{
if ( outputInfo.state==OUTPUT_ERR ){
//录像文件出错，info.errCode中有错误原因
}
｝
相关API请参考:
4. 更新直播内容
如下创建画中画布局作为更新后的直播内容
- 设置录制内容
// 图像内容集合 - 创建画中画布局的摄像头录制内容，
NSMutableArray<RecContentItem *> *contents = [NSMutableArray array];
//获取left（自己）用户id
NSString *myUserID = [[CloudroomVideoMeeting shareInstance] getMyUserID];
//获取c摄像头id
short camID = [[CloudroomVideoMeeting shareInstance] getDefaultVideo:myUserID];
//自己的摄像头（充满布局）
CGRect leftRect = CGRectMake(0, 0, mixerCfg.dstResolution.width, mixerCfg.dstResolution.height);
// 添加到内容列表
RecVideoContentItem *leftVideoItem = [[RecVideoContentItem alloc] initWithRect:leftRect userID:myUserID camID:camID];
[contents addObject:leftVideoItem];
//其他人的摄像头（右边布局）
CGRect rightRect = CGRectMake(0, 0, mixerCfg.dstResolution.width/5, mixerCfg.dstResolution.height/5);
//此处otherUserID在进入用户进入会议时候可以保存，或者使用getAllMembers获取所有成员信息，找出对方id.
NSString *otherUserID = @"";
NSMutableArray <MemberInfo *> * allMemberInfo = [[CloudroomVideoMeeting shareInstance] getAllMembers];
for (MemberInfo *memberInfo in allMemberInfo) {
if(![memberInfo.userId isEqualToString:myUserID])
{
otherUserID = memberInfo.userId;
break;
}
}
short otherCamID = [[CloudroomVideoMeeting shareInstance] getDefaultVideo:otherUserID];
RecVideoContentItem* rightVideoItem = [[RecVideoContentItem alloc] initWithRect:rightRect userID:otherUserID camID:otherCamID];
// 添加到内容列表
[contents addObject:rightVideoItem];
MixerContent *recContent = [[MixerContent alloc]init];
recContent.contents = [contents copy];
- 更新混图器
// 更新图像内容
CRVIDEOSDK_ERR_DEF rslt = [[CloudroomVideoMeeting shareInstance] updateLocMixerContent:@"1" content:contents]；
if (rslt == CRVIDEOSDK_NOERR) {
//更新配置成功
}
相关API请参考:
5.结束
//混图器编号
NSString* mixerID = @"1";
//消毁混图器， 各输出自动结束
[[CloudroomVideoMeeting shareInstance] destroyLocMixer:mixerID];
相关API请参考: