The live broadcast of the game provides a panoramic and virtual reality experience for off-site visitors. The VR live broadcast is presented in the form of a VR video source embedded with 2D game battle screens. Through close-range camera shooting, viewers can watch 4K resolution game screens and team operation panoramic videos through VR devices. The game will be the first of Warcraft. Eight world champions FLY, Grubby, INFI, MOON, 120., ReMinD, TH000 and LYN gathered together. Compared with traditional live broadcast, VR broadcast is a new field and it will inevitably encounter problems. The outside world will also have doubts about this industry. For example, what kind of equipment is used for live broadcasting, what resources are needed for support, etc. We live from the micro whale VR technology. Vice President Tong Xiaoliang’s mouth received some answers. 4 α7s with a splicing server more and more manufacturers are pushing VR panoramic camera, such as Nokia OZO, Jaunt's "big pumpkin", but the program used for live broadcasting is relatively small, the practice of micro whale is To create a VR live broadcast program, the acquisition equipment used Sony's α7s. “There were more than 100 units bought before and after,†said Xiaoliang. Before α7s, micro-whales also tried insta360, GoPro and other solutions, but because of the size of the CMOS, the image quality is difficult to guarantee. Tong Xiaoliang said, “GoPro's sensor and cell phone camera is a level, and the gap between the professional 1-inch card machine is very obvious. We tried GoPro-level, 4/3 inch and other different levels of products in the same field. After coming out, the contrast gap is too obvious after entering the broadcasting station. At one glance, the advantage of the α7s video is that the sensitivity is particularly good. During the concert, the light changes greatly and there is no noise when it is very dark.†But normal Alpha7s is still somewhat different. The VR panoramic video program assembled by the microwhales has undergone a corresponding transformation of the camera, mainly in terms of battery life. “Generally speaking, if the camera battery can be used for an hour or two, we need to make it all-weather. Work, so some adjustments were made on the power supply and on the desktop.†Under the blood to burn money to produce content At the scene of the competition, we met a photographer who misunderstood that I was a live broadcaster and heard him say, “Enough to lay the blood Ah, how much is this!†At first glance, regardless of the dedicated splicing server equipped with a single camera set, the cost of equipment for each solution is close to 100,000 yuan, compared to commercially available VR cameras, the price is not expensive, but if the server outside the device, bandwidth costs, labor costs are added together, the cost is indeed not small. I asked, "How many individuals are needed to participate in such a live broadcast?" The answer to Tong Xiaoliang is 20 people. "On the scene, it may take 12 to 15 people and some people in the background." Bandwidth costs, with Xiaoliang Tell us, "The bandwidth cost will be divided into several segments. For example, the site needs a dedicated line. To the nearest CDN node, this part of the fee is charged by the operator. After entering the CDN network, the service provider will charge according to traffic. These two parts are different." "The cost of a 100Mbps line in Shanghai and Beijing should be around tens of thousands of dollars a week, but this part is not high compared to the overall cost." From a time point of view, the micro-whale cuts into VR live relatively early, I Q. "Is this VR live broadcast project researched and developed as a service provider?" Tong Xiaoliang's answer is "content reserve for the micro whale VR." “We have our own platform and we do content ourselves to enrich the platform and differentiate the content of the platform. It is also better to guide the quality of the content. Because we are in the process of controlling the production process, the standards will be higher.†The delay of one-way broadcasting is about the same as that of traditional live broadcasting for about half a minute. VR broadcasting also faces the problem of delay. In this regard, Tong Xiaoliang believes that “half a minute or so of delay is a coherent and smooth experience in terms of user experience. As for the factors that cause delay, they mainly focus on the part of late-streaming, and the splice on the early stage is basically negligible. “From the camera signal acquisition and input to the server, after the splice is completed, the delay is about 10 frames, and after entering the guidance system may be It will produce a delay of 2 to 3 frames, and the whole sum is about half a second." In the eyes of Tong Xiaoliang, the plug-in link is the main source of delay, which is also related to the delay of the network and the delay of the transmission protocol itself. Fortunately, this part of the delay can be adjusted, for example, using the UPnP protocol to stream to the server. The use of IPX protocol issued to the user, the latter half there is a lot of room for adjustment, broadcast platform can be based on the different projects, the package of time to adjust. "If the strategy is 10 seconds, then 3 packets will happen, which means that after 30 seconds, it will only give you something. This segment is actually the biggest piece of delay. For example, if you set it into two packets, Each packet is 3 seconds, that's 6 seconds," Tong Xiaoliang said. In Tong Xiaoliang's opinion, VR's live broadcast is actually not related to VR. It is mainly a program to push and pack clips. “If it is a traditional large event, live concert, because it is one-way, the audience actually The delay of 1 minute is not sensitive. Even if you go to watch the live webcast of the TV program, this delay will not survive.†The VR live broadcast is very influenced by the climatic factors. The impact of the climatic factors on the live broadcast mainly refers to the rain, and the traditional live broadcast is better. To do this, hold an umbrella on the camera, or use a hood on the lens, simple rain protection measures will be able to get this problem, but VR live broadcast because it is a 360 ° omnidirectional lens shot, even the umbrella did not support. I asked Tong Xiaoliang, “what difficult problems the micro-whale VR encountered during live broadcasting,†he told us about the problems encountered in the final shooting of the New Song in the Bird's Nest. "We wrapped up the camera, wrapped it in bags and cling film, and then pulled out the lens, revealed four shots, then took it out to shower and then we couldn't use it again. It's very risky. If you really hang it off, it's probably worth about 70,000 yuan.†It's not just the cost of the equipment, but it means that the traditional rain protection measures cannot be used on rainy days, which directly leads to a complete live broadcast program. Not available. When Tong Xiaoliang introduced the impact of raining into VR live broadcasting, I supplemented them with another knife. “If you use bags and cling film, because the temperature difference, the lens will not be fogging,†he agreed with this idea. "There is such a risk," said Xiaoliang. "> â–¼ Little whale made a "Warcraft 3" VR live 4 sets of Sony α7s bright from Baidu VR From February 10th to December 12th, the Warcraft III Frozen Throne Global Kings Invitational Nostalgic Finals was held at the Harbin International Convention and Exhibition Center. The Microwhale VR deployed three sets of panoramic camera platforms built by four Sony α7s on site. Live broadcast of the event, providing panoramic and virtual reality experiences for off-site audiences. The VR live broadcast is presented in the form of a VR video source embedded with 2D game battle screens. Through close-range camera shooting, viewers can watch 4K resolution game screens and team operation panoramic videos through VR devices. The game will be the first of Warcraft. Eight world champions FLY, Grubby, INFI, MOON, 120., ReMinD, TH000 and LYN gathered together. Compared with traditional live broadcast, VR broadcast is a new field and it will inevitably encounter problems. The outside world will also have doubts about this industry. For example, what kind of equipment is used for live broadcasting, what resources are needed for support, etc. We live from the micro whale VR technology. Vice President Tong Xiaoliang’s mouth received some answers. 4 α7s with a splicing server More and more manufacturers are pushing VR panoramic cameras, such as Nokia OZO, Jaunt's "big pumpkin," but there are relatively few programs used in the live broadcast field. The practice of micro whale is to create a VR live broadcast program. The equipment used Sony's α7s, "there were about 100 more than one before and after," said Xiaoliang. Before α7s, micro-whales also tried insta360, GoPro and other solutions, but because of the size of the CMOS, the image quality is difficult to guarantee. Tong Xiaoliang said, “GoPro's sensor and cell phone camera is a level, and the gap between the professional 1-inch card machine is very obvious. We tried GoPro-level, 4/3 inch and other different levels of products in the same field. After coming out, the contrast gap is too obvious after entering the broadcasting station. At one glance, the advantage of the α7s video is that the sensitivity is particularly good. During the concert, the light changes greatly and there is no noise when it is very dark.†However, it is still somewhat different from the normal α7s. The VR panoramic video program assembled by the microwhales has been reconstructed for the camera, mainly due to its longevity. “Generally speaking, if the camera battery is used for one or two hours, we can use it for one or two hours. It needs to work around the clock, so make some adjustments on the power supply and on the desktop." Under the blood to burn money to create content At the scene of the game, we met a photographer who misunderstood that I was a live broadcaster and heard him say, “We have enough money to pay for it. How much is it?†At first glance, we did not consider the dedicated splicing server equipped with a single set of cameras. The cost of equipment for each set was close to 100,000 yuan. Compared with commercial-grade VR cameras on the market, the price is not expensive, but if Servers, bandwidth costs, and labor costs outside of the equipment are all added together. This cost is not small. I asked, "How many individuals are needed to participate in this kind of live broadcast?" Tong Xiaoliang's answer is 20 people. "On the scene, it may take 12 to 15 people and some people in the background." In terms of bandwidth costs, Tong Xiaoliang told us that “the bandwidth cost will be divided into several segments. For example, the site needs a dedicated line to the nearest CDN node. This part of the fee is charged by the operator. After entering the CDN network, the service provider will charge according to the traffic. The two parts are not the same." "A 100Mbps line in Shanghai and Beijing should cost tens of thousands of dollars a week, but this part is not high compared to the entire cost." From a time perspective, it is relatively early for the micro-whales to cut into the VR broadcast. I asked, “Is it necessary to be a service provider for self-developed VR live broadcasting?†and Tong Xiaoliang’s answer is “content reserve for micro-whale VRâ€. . “We have our own platform and we do content ourselves to enrich the platform and differentiate the content of the platform. It is also better to guide the quality of the content. Because we are in the process of controlling production throughout, standards will be higher.†One-way broadcasting delay is about half a minute Like traditional broadcasts, VR broadcasts are also subject to delays. In this regard, Tong Xiaoliang believes that “half a minute or so of delay is a coherent and smooth experience for the user experience.†As for the factors that cause delay, they mainly focus on the part of late-streaming, and the splice on the early stage is basically negligible. “From the camera signal acquisition and input to the server, after the stitching is completed, the delay is about 10 frames. After entering the guidance system, it may be Then generate a delay of 2 to 3 frames, the whole sum is about half a second." In the eyes of Tong Xiaoliang, the plug-in link is the main source of delay, which is also related to the delay of the network and the delay of the transmission protocol itself. Fortunately, this part of the delay can be adjusted, for example, using the UPnP protocol to stream to the server. The use of IPX protocol issued to the user, the latter half there is a lot of room for adjustment, broadcast platform can be based on the different projects, the package of time to adjust. "If the strategy is 10 seconds, then 3 packets will happen, which means that after 30 seconds, it will only give you something. This segment is actually the biggest piece of delay. For example, if you set it into two packets, Each packet is 3 seconds, that's 6 seconds," Tong Xiaoliang said. In Tong Xiaoliang's opinion, VR's live broadcast is actually not related to VR. It is mainly a program to push and pack clips. “If it is a traditional large event, live concert, because it is one-way, the audience actually The one-minute delay is not sensitive, and even if you go to watch live TV broadcasts, this delay will not work." VR live broadcast is very influenced by climatic factors The impact of climate factors on live broadcasts mainly refers to rain. Traditional live broadcasts are relatively easy to handle. Umbrellas are used on cameras, or shades are used on the lens. Simple rain protection measures can solve this problem, but VR live broadcast is 360. ° Omnidirectional lens shots, no umbrella support. I asked Tong Xiaoliang, “what difficult problems the micro-whale VR encountered during live broadcasting,†he told us about the problems encountered in the final shooting of the New Song in the Bird's Nest. "We wrapped up the camera, wrapped it in bags and cling film, and then pulled out the lens, revealed four shots, then took it out to shower and then we couldn't use it again. It is very risky. If it really hangs, it will probably cost 70,000 yuan." In fact, not only the cost of equipment hanging off, but it means that in the rain this traditional rainproof measures can not be used, leading directly to the entire live broadcast program can not be used. When Tong Xiaoliang introduced the impact of raining into VR live broadcasting, I supplemented them with another knife. “If you use bags and cling film, because the temperature difference, the lens will not be fogging,†he agreed with this idea. "There is such a risk," said Xiaoliang.