[digikam] [Bug 374355] Video preview lags in the beginning

[Maik Qualmann]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #37 from Maik Qualmann  ---
After one of the last updates of openSUSE Tumbleweed to Qt-5.11 and update of
the QtAV packages, the problem no longer occurs.

Maik

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[digikam] [Bug 374355] Video preview lags in the beginning

[Andrius]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #36 from Andrius  ---
Sometimes I see black screen instead of the videos in my collection. Usually
swtiching to previous/next file helps though. Just saying...

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[digikam] [Bug 374355] Video preview lags in the beginning

[Maik Qualmann]

https://bugs.kde.org/show_bug.cgi?id=374355

Maik Qualmann  changed:

   What|Removed |Added

 CC||metzping...@gmail.com

--- Comment #35 from Maik Qualmann  ---
I do not think we implemented something wrong in digiKam. Here are a few videos
that do not always start from the beginning, sometimes it takes several seconds
to get the video image. However, I can reproduce the behavior just as
synonymous under the QtAV player. Here also openSUSE.

Maik

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #34 from caulier.gil...@gmail.com ---
See my comment on github file...

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[Vincent Petry]

https://bugs.kde.org/show_bug.cgi?id=374355

Vincent Petry  changed:

   What|Removed |Added

 CC||pvinc...@yahoo.fr

--- Comment #33 from Vincent Petry  ---
I still observe this issue on my setup with Digikam 5.9.0 on openSUSE Leap 15
(also on previous versions)

I've posted more details here:
https://github.com/wang-bin/QtAV/issues/835#issuecomment-395199524

If you think this is a different issue please let me know and I'll create a new
report

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

caulier.gil...@gmail.com changed:

   What|Removed |Added

   Version Fixed In||5.8.0
 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |FIXED

--- Comment #32 from caulier.gil...@gmail.com ---
The lag is one problem so fixed with 5.8.0.

The H264 support is another one, depending of FFmpeg codecs installed in
Windows bundle, through MXE package (3.4 version with specific compilation
rules about codecs support).

So the bundle packaging must be customized to support better H264 and H265
video. This is relevant of this bug :

https://bugs.kde.org/show_bug.cgi?id=384807

Note : event is #384807 talk about Linux AppImage bundle, this also true to
support better last ffmpeg codecs under MacOS and Windows.

So i close this file now. Please continue this thread in #384807

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #31 from hardy.pub...@gmail.com ---
Created attachment 109369
  --> https://bugs.kde.org/attachment.cgi?id=109369=edit
Sample video.

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

hardy.pub...@gmail.com changed:

   What|Removed |Added

 CC||hardy.pub...@gmail.com

--- Comment #30 from hardy.pub...@gmail.com ---
(In reply to caulier.gilles from comment #29)
> This problem still reproducible with current 5.8.0 - pre-release Windows
> bundle
> available here :
> 
> https://files.kde.org/digikam/
> 
> Gilles Caulier

I get no lag in Windows 10 but still get the problem reported by Bill. A video
(MPEG4) stops playing but the counter keeps ticking away as if the end of the
video is not recognised. Subsequently the pause symbol is continuously
displayed and you cannot play the video from the start. Video attached.

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #29 from caulier.gil...@gmail.com ---
This problem still reproducible with current 5.8.0 - pre-release Windows bundle
available here :

https://files.kde.org/digikam/

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

caulier.gil...@gmail.com changed:

   What|Removed |Added

  Component|Preview-Image   |Preview-Video

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[digikam] [Bug 374355] Video preview lags in the beginning

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #28 from wildcowboy  ---
This is still happening in appimage 5.6.0 on OpenSUSE.
- Videos lag in the beginning.
- Sometimes I see black screen when switch to next video using Previous/Next
buttons or shortcuts. I hear the sound though.

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[digikam] [Bug 374355] Video preview lags in the beginning

[Maik Qualmann]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #27 from Maik Qualmann  ---
Git commit e21886dc5c22d4f67fae77067fa7442d9821 by Maik Qualmann.
Committed on 15/03/2017 at 21:30.
Pushed by mqualmann into branch 'master'.

check MediaStatus only on QtAV::InvalidMedia also in the slideshow

M  +0-3utilities/slideshow/slidevideo.cpp

https://commits.kde.org/digikam/e21886dc5c22d4f67fae77067fa7442d9821

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[digikam] [Bug 374355] Video preview lags in the beginning

[Maik Qualmann]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #26 from Maik Qualmann  ---
Git commit aa08f547c7c5ad421c26bcbe84889560d2c33799 by Maik Qualmann.
Committed on 15/03/2017 at 20:25.
Pushed by mqualmann into branch 'master'.

check MediaStatus only on QtAV::InvalidMedia

M  +1-5app/views/mediaplayerview.cpp
M  +1-4utilities/presentation/audio/presentationaudiolist.cpp
M  +1-4utilities/presentation/audio/presentationaudiowidget.cpp

https://commits.kde.org/digikam/aa08f547c7c5ad421c26bcbe84889560d2c33799

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #25 from caulier.gil...@gmail.com ---
Maik,

Look the upstream response from QtAV team :

https://github.com/wang-bin/QtAV/issues/835#issuecomment-286328343

Gilles

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[digikam] [Bug 374355] Video preview lags in the beginning

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #24 from wildcowboy  ---
(In reply to caulier.gilles from comment #15)
> We need debug statements printed on the console when a video is played in
> digiKam. For Linux, just run digiKam from a terminal.
> 
> For Windows, you need to install debugview program and run digiKam.
> debugview will capture all debug statements from digiKam. See this page for
> details :
> 
> https://www.digikam.org/contrib
> 
> Gilles Caulier

-- digiKam AppImage Bundle
-- Use 'help' as CLI argument to know all available options
Starting digiKam into GDB...
Use 'bt' command on debugger prompt to get a crash backtrace.
Use 'q' command to quit debugger session.
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
.
Find the GDB manual and other documentation resources online at:
.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from digikam...done.
Catchpoint 1 (throw)
Starting program: /tmp/.mount_I0blN4/usr/bin/digikam 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe78e2700 (LWP 4706)]
digikam.widgets: Breeze icons ressource file found
digikam.general: AlbumWatch use QFileSystemWatcher
[New Thread 0x7fffe5ffd700 (LWP 4707)]
[New Thread 0x7fffe57fc700 (LWP 4708)]
digikam.general: Database Parameters:
   Type: "QSQLITE"
   DB Core Name: "/media/data/FamilyPictures/digikam4.db"
   DB Thumbs Name:   "/media/data/FamilyPictures/thumbnails-digikam.db"
   DB Face Name: "/media/data/FamilyPictures/recognition.db"
   Connect Options:  ""
   Host Name:""
   Host port:-1
   Internal Server:  false
   Internal Server Path: ""
   Internal Server Serv Cmd: ""
   Internal Server Init Cmd: ""
   Username: ""
   Password: ""

[New Thread 0x7fffe4ffb700 (LWP 4709)]
[Thread 0x7fffe4ffb700 (LWP 4709) exited]
digikam.dbengine: Loading SQL code from config file
"/tmp/.mount_I0blN4/usr/share/digikam/database/dbconfig.xml"
digikam.dbengine: Checking XML version ID => expected:  3  found:  3
digikam.coredb: Core database: running schema update
digikam.coredb: Core database: have a structure version  8
digikam.coredb: Core database: makeUpdates  8  to  8
digikam.database: Creating new Location  "/FamilyPictures"  uuid 
"volumeid:?uuid=e0deb5d0deb59eea"
digikam.database: location for  "/media/data/FamilyPictures"  is available 
true
KMemoryInfo: Platform identified :  "LINUX"
KMemoryInfo: TotalRam:  8244797440
digikam.general: Allowing a cache size of 200 MB
digikam.thumbsdb: ThumbDB SelectThumbnailSetting val ret =  0
digikam.thumbsdb: ThumbDB SelectThumbnailSetting val ret =  0
digikam.thumbsdb: Thumbs database: have a structure version  "3"
digikam.general: Thumbnails database ready for use
digikam.general: Switch to widget style:  "Fusion"
digikam.dimg: ("/usr/share/color/icc", "/home/andrey/.local/share/icc")
[New Thread 0x7fffe4ffb700 (LWP 4715)]
digikam.general: Camera XML data: 
"/home/andrey/.local/share/digikam/cameras.xml"
[New Thread 0x7fffd5f9d700 (LWP 4716)]
[New Thread 0x7fffd579c700 (LWP 4717)]
[New Thread 0x7fffd4f9b700 (LWP 4718)]
digikam.facedb: FaceDB SelectFaceSetting val ret =  0
digikam.facedb: FaceDB SelectFaceSetting val ret =  0
digikam.facedb: Face database: have a structure version  "2"
digikam.facesengine: Face database ready for use
[New Thread 0x7fffc3fff700 (LWP 4719)]
[New Thread 0x7fffc37fe700 (LWP 4720)]
digikam.general: Face PipeLine: add database writer
digikam.general: Face PipeLine: add faces trainer
[New Thread 0x7fffc2ffd700 (LWP 4721)]
[New Thread 0x7fffc27fc700 (LWP 4722)]
[New Thread 0x7fffc1ffb700 (LWP 4723)]
[New Thread 0x7fffc17fa700 (LWP 4724)]
[New Thread 0x7fffc0ff9700 (LWP 4725)]
digikam.facesengine: Face database ready for use
[New Thread 0x7fffa3fff700 (LWP 4726)]
[New Thread 0x7fffa37fe700 (LWP 4727)]
digikam.general: Face PipeLine: add database writer
digikam.general: Face PipeLine: add faces trainer
[New Thread 0x7fffa2ffd700 (LWP 4728)]
[New Thread 0x7fffa27fc700 (LWP 4729)]
[New Thread 0x7fffa1ffb700 (LWP 4730)]
[New Thread 0x7fffa17fa700 (LWP 4731)]
digikam.geoiface: "setting backend marble"
QtAV 1.11.0(Mar  9 2017, 11:27:18)
Multimedia framework base on Qt and FFmpeg.
Distributed under the terms of LGPLv2.1 or later.
Shanghai 

[digikam] [Bug 374355] Video preview lags in the beginning

[Bill Goodman]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #23 from Bill Goodman  ---
I just reinstalled digiKam 5.5 (11 Feb 2017). It does not have a problem with
switching videos while one is playing.

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[digikam] [Bug 374355] Video preview lags in the beginning

[Maik Qualmann]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #22 from Maik Qualmann  ---
Git commit f28dc8392fc109bea86559caa84508fe5a04c64e by Maik Qualmann.
Committed on 12/03/2017 at 18:37.
Pushed by mqualmann into branch 'master'.

add debug message for media player status

M  +1-0app/views/mediaplayerview.cpp

https://commits.kde.org/digikam/f28dc8392fc109bea86559caa84508fe5a04c64e

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[digikam] [Bug 374355] Video preview lags in the beginning

[Bill Goodman]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #21 from Bill Goodman  ---
When run from a console, it appears that control is immediately returned to the
user, i.e. there is a console prompt. digiKam does not output any information
at all.

I looked in the Windows event viewer but did not find anything that seemed to
be relevant to digiKam, QtAV or QT.

Is the error message displayed by digiKam or by QtAV?

Are you using a different version of QtAV now than what was used on Feb 13?

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #20 from caulier.gil...@gmail.com ---
Hum,

There is nothing about usual printed information from QtAV player embedded in
digiKam.

Only debug trace from digiKam wrapped in debug log are visible. QtAV do not use
it.

What's happen if you run digikam.exe from the Windows terminal (cmd) ? There
are more information printed. Typically under Linux all debug traces appears in
the console.

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[Bill Goodman]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #19 from Bill Goodman  ---
I added a lengthy comment previously, but it seems to have disappeared.

What I observe is that when a video is started in Preview, it plays normally.

If I switch to a second video while the first is playing, I can hear the second
video playing but there is no image. Only the message "An error has occurred
with the media player...".

If I wait until the audio stops and select another video, it plays properly.

I don't think this was happening in the digiKam 5.5 version I downloaded on Feb
13.

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[digikam] [Bug 374355] Video preview lags in the beginning

[Bill Goodman]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #18 from Bill Goodman  ---
Created attachment 104519
  --> https://bugs.kde.org/attachment.cgi?id=104519=edit
DebugView log of video switch failure

1: Launch digiKam
276: Open preview of first video
283: Switch to second video

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #17 from caulier.gil...@gmail.com ---
There is nothing about video player.

Can you share the full debug trace from the beginning of digiKam ?

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[Bill Goodman]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #16 from Bill Goodman  ---
Created attachment 104518
  --> https://bugs.kde.org/attachment.cgi?id=104518=edit
Screenshot of video switch failure

Screenshot of DebugView log during video switch failure.

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #15 from caulier.gil...@gmail.com ---
We need debug statements printed on the console when a video is played in
digiKam. For Linux, just run digiKam from a terminal.

For Windows, you need to install debugview program and run digiKam. debugview
will capture all debug statements from digiKam. See this page for details :

https://www.digikam.org/contrib

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #14 from caulier.gil...@gmail.com ---
I posted an UPSTREAM report to QtAV team :

https://github.com/wang-bin/QtAV/issues/835

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[Bill Goodman]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #13 from Bill Goodman  ---
The lag seems to be gone on my Windows 7 system. There is a 1-2 second delay
the first time I play a video, but then the video plays correctly from the
beginning. I think that previously it was advancing through the movie during
that time without correctly showing video. And it seems that after the first
play, on subsequent plays the video shows with no initial delay at all, like
something is being cached somewhere. This seems to be true even if I exit
digiKam and restart it.

More good news: the extremely annoying repeat of audio at the end of playing a
movie also seems to be fixed.

Bad news: In preview, switching from one video to another while the first video
is playing causes the media player to report an error and no video is shown.

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[digikam] [Bug 374355] Video preview lags in the beginning

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #12 from wildcowboy  ---
(In reply to caulier.gilles from comment #10)
> I updated all DK 5.5.0 Bundle as pre-version release using last
> implementation from QtAV. Files are here :
> 
> https://drive.google.com/drive/folders/0BzeiVr-byqt5Y0tIRWVWelRJenM
> 
> Can you test to see if problem still there ? Thanks in advance...
> 
> Gilles Caulier

Nothing changed on Linux Mint.
Here is a screen cast:
https://youtu.be/nqG9KZt8f9k

This record actually looks worse than it is but that 1-2-3 latency in the
beginning of the video looks realistic.

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #11 from caulier.gil...@gmail.com ---
The lag can be also due to non OpenGL video widget used in digiKam. I used a
simple widget, not based on OpenGL to not depend on it with video support. 

This is of course not optimum.

The question is : the QtAV open GL widget will have low performnce if OpenGL is
not available on client computer ? AppImage bundle do not know the target
computer feature. OpenGL can be not available. If it's the case, the whish is
to see QtAv video widget switching in decrease mode, typically in simple widget
rendering.

So QtAv openGL widget is adaptive with hardware ?

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

caulier.gil...@gmail.com changed:

   What|Removed |Added

   Platform|Other   |MS Windows

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #10 from caulier.gil...@gmail.com ---
I updated all DK 5.5.0 Bundle as pre-version release using last implementation
from QtAV. Files are here :

https://drive.google.com/drive/folders/0BzeiVr-byqt5Y0tIRWVWelRJenM

Can you test to see if problem still there ? Thanks in advance...

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #9 from wildcowboy  ---
(In reply to wildcowboy from comment #8)
> Looks like the output depends on the codec. Videos straight out of phone
> just lag in the beginning, videos compressed using ffmpeg are slideshows
> (very very slow)

Replying to my own comment.
Now it looks like I have no lags with videos created by ffmpeg but there is a
lag with videos created by phone/camera

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[digikam] [Bug 374355] Video preview lags in the beginning

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #8 from wildcowboy  ---
Looks like the output depends on the codec. Videos straight out of phone just
lag in the beginning, videos compressed using ffmpeg are slideshows (very very
slow)

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[digikam] [Bug 374355] Video preview lags in the beginning

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #7 from wildcowboy  ---
I get a slideshow instead of a video preview on digiKam 5.4.0 on linux Mint
18.1 KDE. There is no sound either.

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #6 from caulier.gil...@gmail.com ---
Note : about rotation, Video digiKam preview permit to rotate media with left
mouse button over canvas.

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[wildcowboy]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #5 from wildcowboy  ---
I just installed QtAV on my Windows 10 but it did not change much. I am okay
with the latency issue but the fact that QtAV does not see the rotation flag is
annoying. I guess I will be pressing F4 instead of double clicking on mp4 files
for now.

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #4 from caulier.gil...@gmail.com ---
I think the big difference between digiKam fopr Window and QtAV player is the
way to compile source code. digiKam use MXE crosss compiler, QtAV M$ Visual C++
(i think).

So the optimizations can be very different, about DirectX for ex.

Note : under MacOS and Linux, DK do not have this kind of latency problem.

Gilles Caulier

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[digikam] [Bug 374355] Video preview lags in the beginning

[Bill Goodman]

https://bugs.kde.org/show_bug.cgi?id=374355

--- Comment #3 from Bill Goodman  ---
I installed QtAV1.11.0-VS2013x86.exe on Win7 and do not see the initial lag
problem using QtAV.Player.

I also do not see the issue with audio repeating endlessly when the video is
stopped in Win7.

No testing done on Win10.

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[digikam] [Bug 374355] Video preview lags in the beginning

[Bill Goodman]

https://bugs.kde.org/show_bug.cgi?id=374355

Bill Goodman  changed:

   What|Removed |Added

 CC||bg+k...@cyclos.com

--- Comment #2 from Bill Goodman  ---
I see the same 2-3 second lag at the beginning of videos on Win7 but I do not
see it on Win10. Both using digiKam 5.4.0

Also, in Win7, the video repeatedly plays the last 0.25 second of audio when it
hits the end of the video. No way to stop the sound repeating. The same
repeating sound happens if the video is paused in the middle.

In Win10, the current time indicator at the bottom of the preview window keeps
counting when the video reaches the end. This does not happen in Win7.

I will try to install the QtAV framework and see if it has the same behavior.

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[digikam] [Bug 374355] Video preview lags in the beginning

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=374355

caulier.gil...@gmail.com changed:

   What|Removed |Added

 CC||caulier.gil...@gmail.com
  Component|AlbumsView  |Preview

--- Comment #1 from caulier.gil...@gmail.com ---
Can you download QtAV for windows and look if problem is the same.

QtAV framework is used inside digiKam to play video.

http://www.qtav.org/

Gilles Caulier

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