https://bugs.documentfoundation.org/show_bug.cgi?id=157440
Bug ID: 157440
Summary: Impress slide images, group exported by HTML are
different than single slide export, causing transition
bleed through in Shotcut.
Product: LibreOffice
Version: 7.5.3.2 release
Hardware: x86-64 (AMD64)
OS: Windows (All)
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Impress
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: c...@eml.cc
Description:
I've been making presentation videos for a speaker, adding the slides from
a PowerPoint presentation over the video of the speaker at the appropriate time
for over a year. I'd import the PowerPoint presentation into Impress, reformat
them to a size that fit the video dimensions and output the slides for the
video. It seems the only way to do a group export is outputting the
presentation to an html by following the help article "Export LibreOffice
Impress Slides as Images," getting img0, img1, ..., and deleting all the extra
file types. But those slide/images are not the same .jpg or .png as I would
get if I exported them one at a time. This shows up in Shotcut when I
transition from one slide to the next (like when adding a bullet point). During
the dissolve the speaker shows up as a background ghost. (Shotcut notes. These
slides are on V2 above V1 so I can move the slides backwards and forward to
time the transitions with the speaker's voice.) This doesn't happen if the
slides are output from Impress as single slides. I did not have this problem
the start of last spring but I'm not sure what I might have been doing
differently or what versions I was running. There are often 40-60 slides to a
presentation so I'm sure I didn't export them all one at a time.
Steps to Reproduce:
1.Output presentation as HTML (or as singles for comparison). I've output jpg
and png with same results
2. Pull them into shotcut. place them on V2 track, and slide to overlap them
for a transition.
3.
Actual Results:
If either one of the 2 images were put out as html the image below bleeds
through.
Expected Results:
If neither were made by html export then they transition fully opaque as they
should.
Reproducible: Always
User Profile Reset: No
Additional Info:
Found it with LibreOffice 7.5.3.2 (x86_64), Shotcut 23.07.23, Win10 Pro 64bit
on a Dell Optiplex 7040.
This behavior is the same in LibreOffice 7.6.1.
Opening the "see through" image in Gimp and exporting it to the same or
another file type, edited or unedited, did not fix the problem.
I've done over 40 presentations using Impress, but had taken the summer off
and this problem was there when I started late Aug and I just figured out it
wasn't Shotcuts problem.
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