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How to change whatsapp video thumbnail


Capture or change a video thumbnail

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A video thumbnail is the first thing that most people see when they interact with a video. A thumbnail is also what is shown in search results. Thumbnails are especially helpful in a library with many media files, because they give viewers a preview of the video content.

Asset libraries in SharePoint make it easy for you to capture a thumbnail of a video, or to upload a thumbnail image for a video in the library. To do so, follow these steps.

  1. Open the asset library that contains the video.

  2. Rest the mouse on the image of the video for which you want to make the selection check box appear, and then click the image to open the video player page.

  1. On the video player page choose the Manage tab in the ribbon.

  2. In the Actions group, click Edit Properties.

  3. Click Change thumbnail, and then choose one of the following options:

    • Capture a thumbnail from video

    • Use a picture from my computer

    • Use a picture from a web address

To learn how to do any of these, click one of the following links to a section in this article.

In this article

  • Capture a thumbnail from video

  • Use a picture from my computer

  • Use a picture from a web address

Capture a thumbnail from video

You can capture a thumbnail from any video that is stored in an asset library. You can't capture a thumbnail of a video if it is stored outside an asset library.

Capture a thumbnail from video.

  1. Click the Play button on the video.

  2. When the video shows the image that you want to capture, click the camera button at the top of the video.


The captured thumbnail image appears below the actual video screen.

  1. Review the thumbnail image. If the image shows what you want, then click Save. If not, repeat the previous steps until you capture the image that you want.

  2. If you want to change anything else (such as Name, Description, Owner, and so on), type the values that you want in the boxes that follow the thumbnail image.

  3. When you finish making changes, choose Save.

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Use a picture from my computer

If you have an image that is stored on your computer that you want to use as a thumbnail for the video, follow these steps.

  1. Select Use a picture from my computer.

  2. Type the path for the picture file, or click Browse to select the file, and then choose Open.

  3. Choose Upload to upload the picture file to SharePoint for use as a thumbnail for the video.

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Use a picture from a web address

You can use a picture that you get from a web address.

  1. Select Use a picture from a web address.

  2. Type the complete URL for the file that you want to use. The URL must include the name of the video file. For example, http://www.contoso.com/VideoThumbnail.jpg

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How to change image and thumbnail in Whatsapp chat (Android)

Versione italiana: Sostituire un'immagine e la sua anteprima nella chat di WhatsApp (Android)

The fundamentals

If you want to change the history of a chat to display a received/sent image over another, it's a breeze. It is enough to go to replace the original file in memory with the fake one. For most of the Android phones, these files are located in the root directory of the system (storage/sdcard0 or storage/emulated/0 for example), folder WhatsApp /Media/WhatsApp Images/ or Sent. Image names are composed of the prefix IMG, the date of arrival and a sequential daily number. Simply delete the image that does not want to show and paste the new file by renaming it as the old. At this point, WhatsApp will show the new image when we go to browse the chat.

This simple trick is affordable for everyone, just the simple File Explorer or some other file manager.

The problem comes if you want to change the thumbnail that appears blurred in the chat before the image is loaded from memory. You may think that this preview is generated by the program according to the saved image, but it does not. And so to the interesting part of this guide.

Legal premise

I will not be responsible for any illegal use of this procedure, as illustrated for the sole purpose of research.

In theory

Previews of the images are not saved in the phone as a file of any kind, so do not go looking for them somewhere in the system or in the cache. These are saved as text in the chat history, exactly as if they were normal messages.
WhatsApp periodically saves a backup of conversations in a SQLite database and encrypts it within his system folder. In this database, in 'messages' table, all the sent and received messages are in chronological order. Each one is described by various fields, such as id, time of arrival and content. For images we also have the url on whatsapp server, size, hash and obviously the preview.
If you use a program like SQLite Database Browser to explore the database, you can see everything and make sure all the fields are clearly legible except thumb_image, and RAW_DATA that is as interesting to us.


This field is not saved as INTEGER or STRING object, but as a BLOB, a hateful particular data type that is used to store small media files in database. There are few software that can natively read this type of data directly from the database, indeed,  i know of only one, Oracle SQL Developer. Except that it does not support the SQLite database, so if you really want to go snooping, you must convert or play around with plugins.
At this point, the plan is simple: take the RAW_DATA  of an image that we want, maybe a specially sent, and going to replace that of the message we want to change.

Requirements

  • Computer, preferably linux, with Python 2.7 installed
  • WhatsApp Xtract
  • File manager you want, like Root Explorer
  • WhatsApp Tri-Crypt
  • My Script for the replacement
  • Possibly a backup of WhatsApp media

Procedure

With the file manager go to the system folder WhatsApp / Database and delete, or even better rename, all the files of old backups.



Open WhatsApp and make a new history backuo from the chat setup


Open WhatsApp Tri-Crypt and select Decrypt WhatsApp Database, you will get a new decrypted file




Transfer the file to your computer and start WhatsApp Xtarct to convert the database into an readable html file. It may take a few minutes depending on the size of the chat, and the same to open the file.

The file appears as a list of messages divided by conversation and in chronological order.
For the demonstration I'm going to change the chat with a friend of mine who is building a bad case for a raspberry pi, I will replace the pictures of the inside of the box with that of blue fan



The reason why we have converted the database, is to be able to read the IDs of the messages, which are necessary to start the replace sript

In the execution folder, the program generates two files that represent the previews, use them as feedback. on error, delete the database and try again.
To see for themselves the success of the trick, just rerun the script or convert the database again in html


The worst is over!

Now take the database file and put it back into the phone instead of those created by whatsapp (to be kept for safety), re-encrypt file using Tri-Cript, and then uninstall and reinstall WhatsApp to allow it to charge the database chat again.

Et voila!



17 ways to make WhatsApp safer and more private

October 23, 2019Technologies

Protect the messenger with a PIN code, remove information about the last time you were online, and hide notifications from prying eyes.

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1. Set up two-factor authentication

Two-factor authentication greatly increases the security of your account. It will protect you if scammers somehow get access to the SIM card.

Open WhatsApp and tap → Settings → Account → Two-Step Verification → Enable. Enter and remember the code you created, then enter your email address - you will need it if you need to reset your PIN. Click Done.

Now, every time you log into your WhatsApp account, in addition to the SMS code, you will also need to enter your PIN.

Read also 🧐

  • How to set up two-factor authentication for all your accounts

2. Disable pop-up messages

When your smartphone is locked, it still shows pop-up notifications. This is very convenient, but not safe: if you conduct confidential correspondence, anyone can spy on the contents of sent messages and the addressee's name on an unattended gadget. And it doesn't require a fingerprint or password.

Therefore, paranoid notifications should be turned off. There are two ways to do this: in WhatsApp itself and in the smartphone settings. In the messenger, open "Settings" → "Notifications". Turn off "Priority Notifications" in the "Messages" and "Groups" sections.

In the smartphone settings, the same is done as follows: open the system "Settings" → "Applications and notifications" → WhatsApp → "Notifications". Uncheck the "Show notifications" option.

If you don't want to turn off notifications completely, at least turn them off on the lock screen. To do this, tap "Settings" → "Lock screen" → "Advanced" → "Lock screen notifications". Here you can hide their content so as not to show the text of your messages to strangers, or simply disable them.

3. Block unwanted contacts

WhatsApp has a huge number of spammers, scammers and just weird and unpleasant people. Luckily, if you don't want to receive messages from someone, you can simply blacklist them.

Open a chat with an unwanted contact and tap "Menu" → "More" → "Block". Or select a conversation with him and press "Menu" → "View contact" → "Block".

You can view users in the black list and, if necessary, remove them from there by pressing "Menu" → "Settings" → "Account" → "Privacy" → "Blocked".

4. Hide your active time

All WhatsApp users can see the last time you went online. But you can disable this feature so that overly annoying interlocutors do not ask questions why you do not respond to their messages.

Go to "Menu" → "Settings" → "Account" → "Privacy". Click the item "Was (-s)". Change it from Everyone to Nobody. This way no one can see when you were last online. But keep in mind that in this case, you will not be able to see which of your friends when you went online.

5. Hide details

Details is the caption that appears next to your name in your contact list. For newly registered users, this field contains “Hey there! I am using whatsapp. You can specify ready-made statuses there, for example, “At work”, “Busy” or write any quotes.

And if the message in your Details field is not for everyone, tap Menu → Settings → Account → Privacy → Details and select either My Contacts or Nobody.

6. Hide statuses

Statuses allow you to share photos, videos, text, and GIFs that disappear after 24 hours. By default, they are shown to all your contacts. If you like to share gifs with cats with your friends, and they come to your boss, you run the risk of being in an awkward situation.

Therefore, go to "Menu" → "Settings" → "Account" → "Privacy" → "Status". Select the "Contacts except" option and specify the people you don't want to annoy with your pictures. Or click "Share With" and your statuses will only be shown to the people you choose.

7. Hide your photo

Perhaps you want only people you know to see your profile picture. To do this, tap "Menu" → "Settings" → "Account" → "Privacy" → "Profile photo" and select the option "My Contacts".

8. Hide the read receipt

When you receive and view a message from someone, the sender has a read receipt checkmark next to their reply in the chat. This is usually convenient, but can sometimes lead to awkward situations. For example, you forgot to write to a friend in time, and he was offended.

To avoid this, tap Settings → Account → Privacy and turn off Read Receipts. Please note, however, that in this case you will no longer see the notification checkmarks. And in group chats, this feature does not work.

9. Read messages in flight mode

There is a little trick for those who do not like the previous paragraph. If you don’t want to turn off read receipts, but still want to look at the received letter and not tell anyone about it, switch your smartphone to flight mode. Then open WhatsApp and read the message. Then close it, turn off airplane mode, and the sender won't get a read receipt.

10. Hide conversations

If you want to hide but not delete a WhatsApp conversation, you can archive it. Press and hold the desired chat until you highlight it. Then, in the top menu, tap the "Archive" button.

Of course, any person who even knows how to use WhatsApp will still find a hidden chat if you give him time to sit on your smartphone. But still, thanks to archiving, confidential dialogues are not so conspicuous.

To view the archive of chats, scroll to the very bottom of the list of conversations and click the inscription "Archived". There you can also remove conversations that you added by mistake.

11. Disable location sharing

WhatsApp allows you to easily share your location with your interlocutor. This is much faster than typing an address. By default, WhatsApp prompts you to choose how long to show your location to a friend: 15 minutes, an hour, or 8 hours.

But it would be embarrassing to find out that you showed someone your location in real time for a long time because you mistakenly sent geodata to the wrong person.

To avoid this, go to Settings → Account → Privacy → Location and make sure you don't share your movements with anyone else.

12. Send private messages from public chats

When you reply to someone's messages in public chats, everyone in the conversation can see it. But you can also send private responses. To do this, highlight the message in the general chat and select the "Reply in person" option from the menu.

13. Revoke unwanted administrator rights

Have you appointed someone as an administrator in a group you created, and he is abusing his authority? Revoke his rights. To do this, press and hold a group in the chat list, then tap Menu→Group Details. Select the name of the desired person and click "Revoke Admin".

14. Hide photos and videos from the gallery

By default, the WhatsApp client on Android saves all received media files to your smartphone's gallery. That is, if someone sent you a confidential photo, you may very well accidentally show it to your friends when you show off pictures from your vacation to them.

Go to Settings → Chats and turn off Media Visibility. Now uploaded files will not be saved in the gallery. At the same time, save mobile traffic.

15. Block the app

In WhatsApp for iPhone, you can secure the app with biometric authentication. Thanks to this, no one will be able to read the correspondence and send messages on your behalf, even if you leave your smartphone unattended.

Open WhatsApp and tap Settings → Account → Privacy → Screen lock. Turn on Touch ID for fingerprint recognition or Face ID for face recognition. Then choose how much time of inactivity to block WhatsApp after.

On Android, this feature is currently only available in the beta version of the app.

Read also 🧐

  • Whatsapp on Android has a fingerprint unlock feature

16.

Delete unwanted messages

Sent someone a message and immediately realized that you shouldn't have done it? Whatsapp allows you to fix this error. To do this, press and hold the message until you highlight it, and then select the "Delete" option from the menu.

True, unlike Telegram, WhatsApp does not delete the message without a trace. Instead, the recipient will see "This message has been deleted." What you have sent will not be deleted after about an hour.

Read also 🧐

  • How to delete WhatsApp messages when this option is no longer available

17. Disable message backup

WhatsApp can back up your conversations to Google Drive on Android or iCloud on iOS. This will come in handy if you want to recover your messages after a system reset or transfer them to another device.

But in the cloud, messages are stored in unencrypted form, which, by the way, WhatsApp warns about in the settings of this function. So if someone gets access to your vault, then the correspondence will be in the wrong hands. If you've secured Google Drive and iCloud with two-factor authentication, there's not much to worry about. But it’s still better for paranoid people to disable message backup altogether.

Tap "Settings" → "Chats" → "Backup Chats" → "Backup" and set the switch to "Never". Now WhatsApp will store copies of chats only in the smartphone's memory.

Read also 🧐

  • 10 useful tips for every WhatsApp user
  • How to send photos in original size on WhatsApp
  • The most detailed comparison of Telegram, Viber and WhatsApp

How to set up automatic deletion of photos in WhatsApp after the first viewing

Despite the fact that WhatsApp has remained at the level of zero years in many aspects, the messenger still continues to develop. Developers regularly release updates, thereby expanding its capabilities and gradually eliminating existing shortcomings. Sometimes they do it rather clumsily, as in the case of supporting multiple devices at the same time, but most often it turns out quite tolerably. For example, at The latest update in WhatsApp introduced the function of auto-deleting attachments after the recipient views them once.

Now you can make a photo sent to WhatsApp delete itself after viewing

WhatsApp removed all restrictions for those who did not accept the new rules

Function deleting attachments sent via WhatsApp for a long time. Despite the fact that earlier in the messenger it was possible to set up automatic deletion of messages in WhatsApp after a certain time, it was not very convenient.

How to delete sent photo in WhatsApp

New feature alert!

You can now send photos and videos that disappear after they’ve been opened via View Once on WhatsApp, giving you more control over your chats privacy! pic. twitter.com/Ig5BWbX1Ow

— WhatsApp (@WhatsApp) August 3, 2021

Firstly, the recipient might not have had time to view the contents of attachments during the time he was given to view. And, secondly, it was not so safe, given that such a message could be opened several times, copied or even forwarded before it was deleted.

The automatic deletion mechanism does not apply to all messages, but only to media attachments. That is, you can count on the fact that after the first viewing, only the photo, video or document that you sent to the recipient will be deleted. The innovation does not apply to text messages and voice recordings.

Mark Zuckerberg reveals how WhatsApp will change

Since this feature was only introduced in the latest version of WhatsApp, you will need to upgrade to use it. Even if you have the auto-update function active, this does not guarantee that the update will be installed. The new version of the messenger was released 3 days ago, but for some reason the iPhone did not install it, so I had to do it manually.

  • Launch WhatsApp and select a chat with the desired interlocutor;
  • Click on the “+” icon to the left of the message entry line;

You can't go wrong with auto-delete enabled

  • Choose a photo or video to send;
  • Click on the one in the circle to enable auto-delete.

Automatic deletion of attachments in WhatsApp

When the auto-delete feature is enabled, a notification will appear on the screen indicating that the sent attachment will be deleted after the recipient views it. That is, make a mistake and Sending a photo or a video to WhatsApp just like that without turning on automatic deletion will be quite difficult. In general, there are no problems with convenience.

Left - attachment not viewed, right - attachment viewed

But there are problems with security. At first I thought that the auto-delete function was needed in order to prevent the recipient from figuring out in time what to do with the attachment - save it or take a screenshot.

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