Openshotv2.5.1-dev2 blender-2.82a crash "can't use animated title"

[SebO-L]

Describe the bug
OpenShot-v2.5.1-dev2-1587624156-15c3efb7-26b7db94-x86_64.AppImage blender-2.82a-linux64 AnimatedTitle crash
Can't use blender for animated Titled with the last version of OpenShot
Generate button is greyed
I use the daily build of Openshot because the last stable build is not working on my debian machine.
I download the last blender binary (2.82a) from the official site because the version in the stable debian package manager is too old (2.79)
I reproduced the same bug on Ubuntu 18.04 with the same package.

Steps to reproduce the behavior:

1. Select the blender binary in Preferences
2. Go to Title-> Animated Title
3. Select one of the title "snow effect for example"
4. The generate button is greyed

Expected behavior
Generation of my animated title with blender

System Details

• OpenShot Version: 2.5.1-dev2
• libopenshot Version: 0.2.5-dev2
• Platform: Linux-4.19.0-8-amd64-x86_64-with-debian-10.3
• Processor:
• Machine: x86_64
• Python version: 3.4.3
• Qt5 version: 5.2.1
• PyQt5 version: 5.2.1
• Qt Detected Languages: ['fr-FR']
• LANG Environment Variable: fr_FR.UTF-8
• LOCALE Environment Variable:
• Daily Build Installed: http://github.com/OpenShot/openshot-qt/releases/download/OpenShot-v2.5.1-dev2-1587624156-15c3efb7-26b7db94-x86_64.AppImage

Log Files

• http://logs.openshot.org/k2bi7jrvpni9eqk02t470kscf4d5o9yt/openshot-qt.zip
• http://logs.openshot.org/k2bi7jrvpni9eqk02t470kscf4d5o9yt/libopenshot.zip

Exception / Stacktrace
No stacktrace found in log files

[ferdnyc]

Gah, seems subprocess is unhappy with Blender printing non-ASCII pathnames, when the default encoding is detected as 'ascii'`. I believe #3413 will fix this even for Python 3.4.

[ferdnyc]

@SebO-L Here's a link to an AppImage built with #3413 applied:

https://drive.google.com/file/d/1LIXaUEezQjiganUjr-DIvkn1Wvfc5gxi/view?usp=sharing

Could you test whether that solves this issue for you? If so I can merge the PR and this will be fixed in the Daily Builds. Thanks.

[SebO-L]

@ferdnyc
Hi, sorry it did not solve the issue. In fact, I am not able to reproduce the error, because the patch create another bug.
Openshot is not able to find the blender executable any more. I did two different tries.
At first, I kept the blender binary in the download folder ("Téléchargement" in french) and it was not working.
Second try, as it seems to be related to ascii encoding I moved the binary in my home folder and create a symbolic link in /usr/local/bin. But, the result is the same, Openshot can't find blender binary.

I Attach openshot-qt.log and the blender -v command result
Regards,

openshot-qt.log
blender_verbose.txt

[ferdnyc]

Thanks for testing! I'm guessing this means it failed to run the Blender version check with the new code, the logs should tell me why.

[ferdnyc]

*sigh* Or not, because there's no error logged at all. But it's pretty clear what the issue is. Because we can't pass encoding='utf-8' to subprocess.Popen() until Python 3.6, I tried to work around that by doing a .reconfigure(encoding='utf-8') on the stream after it was opened. Problem is, .reconfigure() isn't supported until Python 3.7! So, it's back to the drawing board.

...Stinkin' Python 3.4. 😠

[SebO-L]

OK,
BTW, as a workaround, I moved the blender binary in a folder without french character and it's working.(with OpenShot-v2.5.1-dev2-1587624156-15c3efb7-26b7db94-x86_64.AppImage)

So I don't know if it's useful for you to speed too much time on that bug nor to wait for the new python version.

Regards,

[ferdnyc]

@SebO-L Great, I was going to suggest exactly that workaround.

But, no, we're stuck with Python 3.4 for the foreseeable future, so this has to be made to work with it — however convoluted and backwards that ends up forcing the code to be.

[ferdnyc]

Ohhh-kay. This is an AppImage with #3416 integrated:

https://drive.google.com/file/d/1ipXiuDpUxz057jGtapgDh5XyvxtoZRqE/view?usp=sharing

I've already tested it myself, this time, but if you'd like to as well that'd be great. I'm pretty confident in this version of the fix, though, as I successfully rendered an animated title using a /var/tmp/Fjörd/blender symlink as my Blender path. 😉 Once #3416 is merged the Daily Builds will also include the fix.

Thanks for the helpful report(s)!

[SebO-L]

@ferdnyc Ok it's working now.
Thanks for your work !