Steps to replicate the issue (include links if applicable):

• https://logstash.wikimedia.org/goto/0d2944569f3e470f06ad7ddf71d79676
• the WebvideoTranscode class has a getFile() function to access the file it is associated with.
• This function gets called from setTranscodeError , in turn called from the run()

What happens?:

• A job is added to the queue
• The file is deleted (or moved)
• The job is run
• Run checks for file presence
• File is missing so we go to setTranscodeError
• setTranscodeError calls getFile()->getName()
• getfile returns false and we have an error.

What should have happened instead?:
It should not have used getFile()->getName(). instead we can simply use this->title

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

from /srv/mediawiki/php-1.42.0-wmf.26/extensions/TimedMediaHandler/includes/WebVideoTranscode/WebVideoTranscodeJob.php(208)
#0 /srv/mediawiki/php-1.42.0-wmf.26/extensions/TimedMediaHandler/includes/WebVideoTranscode/WebVideoTranscodeJob.php(231): MediaWiki\TimedMediaHandler\WebVideoTranscode\WebVideoTranscodeJob->setTranscodeError(string, string)
#1 /srv/mediawiki/php-1.42.0-wmf.26/extensions/EventBus/includes/JobExecutor.php(80): MediaWiki\TimedMediaHandler\WebVideoTranscode\WebVideoTranscodeJob->run()
#2 /srv/mediawiki/rpc/RunSingleJob.php(60): MediaWiki\Extension\EventBus\JobExecutor->execute(array)
#3 {main}