# 云端直播推流

//配置混图器编码参数：尺寸为640*360，其他采用默认设置
  MixerCfg *cfg = [[MixerCfg alloc] init];
  [cfg setDstResolution:(CGSize){640, 360}];
  
  NSMutableDictionary<NSString*,MixerCfg*> *cfgDic = [NSMutableDictionary dictionary];
  [cfgDic setValue:cfg forKey:@"1"];

// 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];
  
  NSMutableDictionary<NSString*,MixerContent*> *contentDic = [NSMutableDictionary dictionary];
  [contentDic setObject:recContent forKey:@"1"];


//配置混图器输出：直播推流地址为rtmp://xxx
NSMutableArray<OutputCfg*> *outputCfgs = [NSMutableArray array];

//添加推流配置
OutputCfg* outputStearmCfg = [[OutputCfg alloc]init];
[outputStearmCfg setType:OUT_LIVE];
[outputStearmCfg setLive:NO];
[outputStearmCfg setLiveUrl:@"rtmp://xxx"];
[outputCfgs addObject:outputStearmCfg];

NSMutableDictionary<NSString*,MixerOutput*> *outputDic = [NSMutableDictionary dictionary];
MixerOutput* output = [[MixerOutput alloc]init];
output.outputs = outputCfgs;
[outputDic setObject:output forKey:@"1"];


int rst = [[CloudroomVideoMeeting shareInstance] startSvrMixer:cfgDic contents:contentDic outputs:outputDic];;
if(rst != 0)
{
  //开启 互动直播 出错!
  ...
}

//互动直播状态变化通知
- (void)svrMixerStateChanged:(MIXER_STATE)state err:(CRVIDEOSDK_ERR_DEF)sdkErr opratorID:(NSString*)opratorID
{
  ...
}

//更新为画中画模式
 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
  CGRect bigRect = CGRectMake(0, 0, mixerCfg.dstResolution.width, mixerCfg.dstResolution.height);
  // 添加到内容列表
  RecVideoContentItem *bigVideoItem = [[RecVideoContentItem alloc] initWithRect:bigRect userID:myUserID camID:camID];
  [contents addObject:leftVideoItem];
  
  //右下角摄像头
  CGRect rightRect = CGRectMake(mixerCfg.dstResolution.width-160, mixerCfg.dstResolution.height - 90, 160 ,90);
  //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];
  
  NSMutableDictionary<NSString*,MixerContent*> *contentDic = [NSMutableDictionary dictionary];
  [contentDic setObject:recContent forKey:@"1"];

[[CloudroomVideoMeeting shareInstance] updateSvrMixerContent:contentsDic];

[[CloudroomVideoMeeting shareInstance] stopSvrMixer];