@SGaist said in High-quality animated image support: Hi, AFAIK, it's not a format supported officially however IIRC, mng is. I stumbled upon this patch that might be of interest to you. Yes, I saw this patch. However, it's from 2013 - do you think it will still work? I guess there's only one way to find out...

@Wieland No, we are using the <video> tag in HTML5, together with JS to play webM format video. With 5.6, the video goes up all the time till the system crashes. The problem is disappeared in 5.7 with newer Chromium core, but it leads out a new problem as indicated the https://bugreports.qt.io/browse/QTBUG-53411. When we use 5.7, the memory is fairly stable, but then after the first run, the JS will fail to work with the application due to a bug in QwebchannelTransport. We tried to build QT from source code, but the WebEngine won't build (see my other post). We are looking for a compiled WebEngine module with the bugs fixed as indicated in the QTBug-53411. Thank you.