I was able to confirmed and reproduce this on different versions of Windows and Chrome browsers. Finally, after doing numerous web searches, I came across a technical support article at TechSmith (Snagit's developer) which acknowledges the issue but offers no immediate solution. Support article is linked here for your reference.
After some research, I realized the issue is somehow related to how Snagit copies images into Windows clipboard. Pasting a Snagit screen capture into MSPAINT and then copying it again into Gmail would work without any problems so a simple interim fix could involve creating a small auxiliary "Converter" program that sits between Snagit and clipboard. The converter app would need to be seamless and require to user input. Luckily, Snagit has a program output feature which is very customization and allows me to execute any 3rd party app and supply it with the captured screenshot. I created a small Windows app in VB.NET with few lines of code that reads an input image file and copies it back into clipboard in a standard format without any user input.
Sub Main()
'// make sure filename is provided
If My.Application.CommandLineArgs.Count = 0 Then
MsgBox("Please specify an image filename!", MsgBoxStyle.Critical)
End
End If
Try
'// load image file to clipboard
Dim picImage = Image.FromFile(My.Application.CommandLineArgs(0))
My.Computer.Clipboard.SetImage(picImage)
Catch ex As Exception
'// Error out
MsgBox(ex.ToString, MsgBoxStyle.Critical)
End Try
'// All done
End
End Sub
For those who don't want to bother with compiling their own executable, I have compiled a version which be downloaded from here. I called it SnagitGcopy. It's a single EXE file and doesn't require installation. You must have Microsoft .Net Framework installed. If you don't already have it, it can be downloaded from here.
In order to configure Snagit so it can properly copy and paste images into Gmail, Please follow instructions below:
1) Download SnagitGcopy from here and store it in a folder (i.e. C:\GCOPY).
2) Open up Snagit.
3) Under "Profile Settings", Select "Program" as output. This should allow calling our converter program.
4) Then select "Properties".
5) Click on "Add" button.
6) Click on "Open" icon and locate SnagitGcopy executable that you saved in a directory in step 1.
7) Leave the rest as is and click on "OK".
8) Now, we need to change the file name used by Snagit to save screen captures. Click on "Options" under "File name".
9) We should use an static file name to avoid creating a new file each time screen is captured. Put in "gcopy" under "Format" and make sure "Ask before overwriting existing file names" is not checked otherwise you'll be getting an annoying dialog box each time. Click on "OK" to continue.
10) At last change the directory for temporary image file to C:\GCOPY as indicated below. Click on "OK".
You should now be able to copy & paste screen captures directly into Gmail without any issues. If you have setup Snagit to show its Editor after each capture, Make sure "Send" button or [Ctrl+Enter]
Here is an example of an images pasted into a message in gmail:
Let me know if you encountered any issues. I would try to get back to you as soon as I can.
Also, please remember that, as always, the usual disclaimers apply. Please backup your system, Save settings, and other common precautions before trying anything new...