https://bugs.documentfoundation.org/show_bug.cgi?id=160863
Bug ID: 160863
Summary: AVI files freeze Impress
Product: LibreOffice
Version: 24.2.1.2 release
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Impress
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: sarentasci...@hotmail.com
Created attachment 193899
--> https://bugs.documentfoundation.org/attachment.cgi?id=193899&action=edit
Sample of a video file causing this issue
My old presentation started to freeze after some time. I do not remember, when
it worked last. The bug may emerged sometime at version 7.x or 24.2. (but more
likely 7.x, as I remember having issues before upgrading to 24.2). Freezing
means unresponsive Impress without excessive CPU/RAM usage. Actually, the
process is pretty much idle.
Finally, finding the time, I investigated, why freezing occurs at a random time
point. This led to the finding that freezing occurred at any time certain 2
slides were displayed (either in slide pane or content view).
So I checked the content of those slides and found video files linked. After a
few trials of removing those and checking if Impress freezes, I realized that
removing all of those 4 videos managed to prevent freezing Impress.
I think that this is a codec issue. Then I went ahead and opened a fresh new
file and tried to embed or link one of these videos. This immediately froze
Impress. These videos are (if I remember correctly) generated with ImageJ. They
may deviate from traditional AVIs recorded by cameras in terms of encoding. For
instance, they may not be RGB or 8-bit color depth (e.g. 16-bit). Besides, they
may also not be 24fps or any other traditional frame rate. All of these
scenarios are quite normal for a presentation in life sciences (and probably
also medicine, astronomy, physics etc.).
My version of LO:
Version: 24.2.1.2 (X86_64) / LibreOffice Community
Build ID: db4def46b0453cc22e2d0305797cf981b68ef5ac
CPU threads: 8; OS: Linux 6.5; UI render: default; VCL: gtk3
Locale: de-AT (en_US.UTF-8); UI: en-US
Calc: threaded
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