I might miss something. There were the same errors as before after adding missing directive in /opt/kaltura/app/configurations/batch/batch.ini.
Then I did update to v13.16.
209 [KAsyncExtractMedia : JobHandlerWorker]
210 params.ffmpegCmd = /opt/kaltura/bin/ffmpeg
211 id
There are not the same errors as before after update to v13.16