The duty officer singled out that video, "Just this one?"

Yan Suizhi reached out and nodded, "There are also ten minutes before and ten minutes after, and the three videos are connected together."

The attendant did so in a confused manner. After picking it out in this way, the video should be shorter. The watchman thought, since it is important to watch these videos, then there must be some details to pay attention to.

So he thought wisely and asked, "What about the playback speed? Do you want to slow it down, or you can zoom in locally. It's just that the effect of partial enlargement of this night vision image may not be so good."

The manager went with him, and Wen Yan nodded and said, "Well, slow down and zoom in, so that a few guests will look good."

In fact, he had already determined that Master Qiao was wrong, after all, a person who hadn't slept well in a few days, it was normal to shake a **** in the middle of the night. But this can't be said by others, and Master Qiao has to see it for several times and he will die.

The manager glanced at Joe secretly, thinking so.

Yan Suizhi said, "No."

He tapped the playback speed in the corner of the screen, "Tune to the fastest, you don't need to put the part, pull the panorama."

The duty officer and the manager looked at each other, but according to the principle of the supremacy of guests, they still did it dumbly.

The video speed is adjusted to the fastest. At this playback speed, the branches and leaves in the corner swayed in the wind like a cramp, and they were turned upside down and then upside down again.

It was finished soon, and I still couldn't see any flash of light in the "sixth room".

Master Qiao himself gave up and scratched his cheek gang with a laugh, "That ..."

Gu Yan pressed his palm to him, indicating that he should not speak first.

"Huh?" Joe leaned in.

Gu Yanchong on duty said: "Excuse me, transfer out the video of the corridor and repeat it again, also at this speed, panoramic view. If convenient, go with this outside the building."

"What happened?" Master Qiao said, "See what's coming?"

"Maybe." Gu Yan did not say too much, but he almost understood what Yan Suizhi meant: "It still needs confirmation."

Joe: "..."

Every time I was mixed with this group of lawyers, Master Qiao always wondered whether he might be blind or stupid.

But the person he likes is a lawyer, the best friend is a lawyer, and the person his best friend likes is a lawyer.

He may have a curse in the dark.

The duty officer was again confused.

He divided the big screen into two pieces, one piece repeatedly broadcasted the three sections of monitoring just outside the building, and the other piece was broadcasted in the corridor as he wanted to take care of Yan.

In order to prove that he was not blind, Master Qiao stared at the corridor with attentive arms and staring attentively.

Similarly, at the fastest playback speed, the security guards traveling back and forth turned into a virtual shadow, and the light of the corridor changed occasionally from light to dark, but nothing else was obtained.

Master Qiao concentrated for ten minutes, accepting the cruel fact that he was “really blind”.

Yan Suizhi: "Well, I know."

The attendant was stunned and quickly pressed the pause.

Yan Suizhi knocked on the screen and said firmly: "In these 10 minutes and last 10 minutes, one of the two videos is fake."

"Ah?" The manager froze.

Yan Suizhi said: "The light in the corridor is wrong."

"What do you mean?" The manager quickly asked the duty officer to repeat the two ten minutes, and found that the light in the corridor was slightly brighter in the middle.

This change is very subtle, and the video is not fast enough to be conscious, and only to the extent required by Yan Suizhi and Gu Yan can barely feel the flicker of light and darkness on that little light.

Even so, it is still easy to be ignored. After all, the attention of normal people is whether there are suspicious people, and they will not pay too much attention to the light.

After being so mentioned by Yan Suizhi, the manager gave a soft "huh" sound.

The corridor lights of this hotel are of the same type as most hotels in the Union. From 9 pm to 2 midnight, it is the brightest time. After 2 pm, the brightness of the sky and the sky become darker, but the process is very Slow, often when you realize that it is darker, it has been a long time.

This process of change rarely feels frustrating, it is silent and smooth.

"Yeah, how about a good flash, someone has moved the light? What is turned off? Or what is turned on?" The manager realized that this subtle flash of light and darkness was crucial, but it didn't react for a while. What was wrong.

Yan Suizhi greeted the attendant and took over the playback control keys in his hand to rewind the video. When he relocated to that dimly lit spot, he "snapped" the pause button. This point happens to be at the beginning of the second video.

He said: "These two paragraphs are repeated."

Someone filled the monitoring content of the first 10 minutes into the next 10 minutes.

Therefore, the silent and slowly dimmed lights in the first video will be slightly brighter at the beginning of the second segment, and then repeat the darkening process that is difficult to see with the naked eye.

There was no one in this corridor, no moving things, no objects to refer to, except for the few points of the security patrol, the rest of the night was often the still picture all night.

So the people who filled it thought that there would be no big problem with repeating a paragraph. As long as the monitoring time is improved, it will be difficult to find.

But I met Yan Suizhi and Gu Yan.

"It's more than this." Gu Yan pointed to the video that was constantly replayed outside the building. "There are also two duplicates here."

He patted Yan Suizhi's hand, occupied the playback controller, disassembled the surveillance video outside the building, and put the two videos on the big screen at 3 o'clock and 3:10 at the same time, and started playing from the beginning.

This is very intuitive, because in the two left and right videos, except for the time shown in the corner. All the remaining steps are exactly the same. The flower tree under the left wall twitched twice, and the right twitched twice.

The lawn on the left rose slightly, and there was a wave on the right.

Gu Yan turned to Qiao and said, "So you read right last night."

The reason why the light spot is not seen is because the video where the light spot should appear is replaced.

The manager is suddenly excited!

Surveillance video has been changed, this is not a simple thing!

"What should I do?" The manager flew around twice without a head, and one hand was still stroking back and forth on the empty collar.

After a moment, he reacted violently, pressing the back of the chair and asking the attendant: "You were on duty yesterday?"

The officer on duty dare to take this pot and waved his hands, "It's not that I'm not me. I took the shift at 6 in the morning. It was Barry last night."

"Barry alone?" The manager asked with a frown. "Isn't it required to have two on duty during the night?"

He pulled out the screen of his smart phone for work three or two, and turned over the shift schedule. "Shouldn't it be Barry and Dan last night?"

"Yes, usually two." The watchman said, "But ... but occasionally there are special circumstances, it is okay to ask the team leader for leave ... after all, the monitoring center is not really busy at night."

The manager's face was black.

The watchman quickly explained again: "It happens only occasionally. Generally, the team leader will ask someone to replace him. Sometimes he simply replaces himself. But recently there are many infected people, and the staff is a little nervous, so ... So the last time the team leader asked you to tell me, it was n’t enough that there was only one person at night. What do you say ... First, get over it first, and let the personnel officer recruit people. "

One has two, and one can overcome the second.

The manager is not unreasonable. When I think about it after the duty officer, I think it seems that there is such a thing. He stood awkwardly for a while in embarrassment, then scolded himself angrily.

"Why? Can you find someone?" Joe asked.

The manager nodded again and again, "Rest assured! Opposite the staff dormitory, I gave the group leader a newsletter and asked him to bring Barry over to ask."

He dialed the communication while talking, and as soon as the other side connected, he anxiously said: "Where? Why was Barry alone in the monitoring room last night? Dan?"

"A rash?"

"Drug addiction?"

"It's all messy. I don't care where you are now. Call me Barry first. I'll wait for him at the monitoring center. Come with you too!"

Yan Suizhi reminded: "Be low-key, don't say anything first."

The manager responded, and told the unlucky team leader the same.

He hung up the communication, and after thinking about it, he let the duty officer slap the two monitoring heads again. There are three such repeated clips. The corridor occupies two. One is from 3 a.m. to 3:10, one is from 3:40 to 50, and the outside is from 3:10 to 20.

"So ..." the manager said a little anxiously, "If there are really unknown people, it's roughly the room that came in a few minutes after 3 o'clock, more than 40 minutes out. Mr. Qiao, the light spot you see—"

"I think it's about 3:10, just starting out, maybe even 11 or 12." Joe said.

"Is there any other angle of monitoring?" Joe thought and asked the manager, "For example, is the one with a higher angle of view facing the window?"

The manager shook his head, "It's impossible to set up a monitor at that angle, how can it make sense against the window of the guest. With these monitors, you have to receive some complaints from the ** side every year, it's hard to adjust."

Speaking of a joke that is not a joke, the place with the fewest surveillance devices in the entire league is the Wine City, Red Rock Star and Decama.

The famous ruins, the famous political center and the famous Jinjin Grottoes.

The former is left unattended, and the latter two are always blocked.

The manager waited for five minutes with a sad face, and received the newsletter from the team leader.

"Barry is gone? What do you mean? Not in the dorm?"

He glanced at Yan Suizhi and gave them a second gesture, indicating that they were not in a hurry, and said to the team leader at the other end of the communication, "Where have you seen it? How many times have you communicated? Didn't you get through once?"

"Look again!"

Five minutes later, the door of the monitoring center was knocked.

A man wearing a hotel uniform and a name tag from the monitoring team hurriedly entered the door. He snapped his hands behind the door and closed the door. He said to the manager with a pale face, "I've found it all, I can't find it."