Openshot-qt: Openshot 2.2 for Windows 10 x64 is tremendously slow, often unresponsive. #bug

[jebeld17]

System Details:

• Operating System / Distro: Windows 10 Pro x64.
• OpenShot Version: 2.2 for Windows x86_64.
• _Msinfo32 Export File Attached._
  msinfo32.txt
• _Problem Steps via Microsoft Windows Problem Steps Recorder are also Attached._
  ProblemSteps.zip

Issue
Openshot 2.2 for Windows 10 x64 is tremendously slow, especially when moving items on a track around and rearranging items. The program often is either unresponsive to commands (such as undo, cut, paste, etc.) leading to things needing to be done twice.

[jebeld17]

@ktecho is this similar to the issue you've been having?

[ktecho]

@jebeld17 No. For me it doesn't open sometimes. But I haven't done any video editing yet, so I don't know how that works.

[ankitpati]

Can you please try the latest stable release, and let us know if it works?

[AluminiumTech]

@ankitpati I can confirm that similar issues occur in 2.3.1

[ankitpati]

@AluminiumTech Thank you for the report. We shall hopefully resolve it soon.

[jebeld17]

Similar issues are happening. The program is still freezing up on me whenever editing a video.

[petesimon]

similar problem for in v2.3.4 release (and v2.34 dev3, dev4, etc), in my Windows 10 x64 (1703). but other video editors such as Shotcut v17.08 and Videopad v5.xx work fine.

[DylanC]

@jebeld17 - Is the v2.4 daily build performing the same for you?

[EdGe7x]

Just adding my comments. I would live to use OpenShot regularly but it just lags and freezes all the time. Especially the preview, it just won't play so I can see the type of effects I am trying to implement. Also using Windows 10 x64, 8GB of Ram, SSD HDD. Version of OpenShot being used is 2.4.0.

[manylegged]

I am also experiencing extreme slowdowns on Win10/x64. The GUI hangs for 10-15 seconds after every timeline operation. I just installed openshot a few hours ago and have been using it to edit videos. I think it's getting worse fairly rapidly - when I started it was pretty responsive.

The video I'm editing is 1:40 long and has 20 sections, all in one track. There are no transitions or anything.

I tried restarting openshot several times but it does not seem to improve performance noticeably.

I tried attaching the visual studio debugger during a hang and stack traces pretty much look like this. Looks like something in python.

Let me know if there is anything else I can do to help.

ntdll.dll!NtDelayExecution

() Unknown Non-user code. Symbols loaded.
KernelBase.dll!00007ffc00ad7287() Unknown Non-user code. Cannot find or open the PDB file.
libpython3.5m.dll!000000006d72d3f0() Unknown No symbols loaded.
libpython3.5m.dll!000000006d6c6a26() Unknown No symbols loaded.
libpython3.5m.dll!000000006d6c7f9a() Unknown No symbols loaded.
libpython3.5m.dll!000000006d6c80c0() Unknown No symbols loaded.
libpython3.5m.dll!000000006d6334a3() Unknown No symbols loaded.
libpython3.5m.dll!000000006d60ac67() Unknown No symbols loaded.
libpython3.5m.dll!000000006d61f88a() Unknown No symbols loaded.
libpython3.5m.dll!000000006d60ac67() Unknown No symbols loaded.
libpython3.5m.dll!000000006d6bde07() Unknown No symbols loaded.
PyQt5.QtCore.pyd!000000006f23e801() Unknown No symbols loaded.
PyQt5.QtCore.pyd!000000006f23ec30() Unknown No symbols loaded.
PyQt5.QtCore.pyd!000000006f23edd1() Unknown No symbols loaded.
PyQt5.QtCore.pyd!000000006f2414ce() Unknown No symbols loaded.
PyQt5.QtCore.pyd!000000006f241656() Unknown No symbols loaded.
PyQt5.QtCore.pyd!000000006f182cf7() Unknown No symbols loaded.
Qt5Core.dll!00000000668e8a62() Unknown No symbols loaded.
Qt5Core.dll!000000006675e1d2() Unknown No symbols loaded.
msvcrt.dll!00007ffc01ebae06() Unknown Non-user code. Cannot find or open the PDB file.
msvcrt.dll!00007ffc01ebaedc() Unknown Non-user code. Cannot find or open the PDB file.
kernel32.dll!00007ffc01de2774() Unknown Non-user code. Cannot find or open the PDB file.
ntdll.dll!RtlUserThreadStart
() Unknown Non-user code. Symbols loaded.

[DylanC]

@manylegged - Thanks for the stack trace. This is something we can investigate further.

[DylanC]

@manylegged - Was this OpenShot v2.4.0 or v2.4.1?

[manylegged]

I was using v2.4.0 when I captured the stack trace - however I just installed v.2.4.1 and I can confirm that it is still very slow when doing any timeline operations.

[DylanC]

@manylegged - No problem. Thanks.

[shenzj1994]

Same here. Any operations on timeline is extremely slow and makes this software completely unusable on Windows 10. Even if I only move the clip a little bit, do a drag-and-drop, any of these operations freeze the GUI for about 15s. Hopefully there would be a fix soon. Have to use other software to do my job now.
FYI, I was using 2.4.1.

[Sickman]

It seems as if every operation is taking longer than the last. On a new project the delay was a few seconds but after 20 or 30 operations it is a minute of (not Responding) before it is ready for the next operation.

[soccerguy243]

I have to click on picture, wait, drag, wait, drop, wait, move, wait. Always waiting. Windows even shows it as Unresponsive but I wait and it comes back. :(

Even the daily build of 23 Nov. So laggy, every movement is delayed.

[DylanC]

Guys this is not a forum. If you have a detailed report to put in as an issue that is fine. Just saying it lags when doing anything does not help us at all.

This issue is a bit too vague anyway and out of date since the original reporter has not given recent feedback.

@manylegged - We will still use the stacktrace from this issue.