Found the problem with stuttering playback - version 2.7.1 on Win 10

[Virtual]

Playback was stuttering badly in the Avidemux window.  New download of vers 2.7.1 on new Dell Optiplex 3060 with Windows 10 Pro, version 1803.

Go to Preferences>Display.  Under "GUI Rendering Options", check "Enable openGl support".

[eumagga0x2a]

Stuttering playback after going to the previous picture, unrelated to selected video output, was a regression in 2.7.1, fixed a few days after the release. Please use at least the latest release (2.7.3) or much better the latest nightly (currently 190630), either the one built with Microsoft Visual Studio C++ on Windows https://avidemux.org/nightly/vsWin64/ or cross-compiled with MinGW on Linux https://avidemux.org/nightly/win64/.