Hello Tobias Wunden, thank you for your answer. That are exactly the information I was looking for.
Greeting, [email protected] Am 06.06.2011 22:03, schrieb Wunden Tobias: > Hi, > > (removed the Opencast community list from cc:, as this kind of conversation > does not seem suitable). > > ffmpeg can indeed be compiled with multithreading support. However, the > Matterhorn thirdparty install scripts are created for robustness, and a > multithreaded ffmpeg did show issues in earlier tests. In addition, > Matterhorn ensures that you can run up to <number of cores> workflows in > parallel, so if you ingest 4 recordings, all 4 cores should be used. > > If you don't like that behavior, feel free to recompile ffmpeg with the > multithreading support enabled. > > Tobias > > On 06.06.2011, at 21:39, matpro_fhkoeln wrote: > >> Hello Ladies and Gentlemen, >> >> I noticed the following: while encoding a video, only 1 of 4 cores are >> at 100% load, for example: >> >> 2011-06-01 15:28:37 INFO (ComposerServiceImpl:193) - Encoding video >> track track-3 to 1c960bfd-4e5f-4077-8698-d455e95affb7 using profile >> 'feed-avi.http' >> 2011-06-01 15:28:37 INFO (AbstractCmdlineEncoderEngine:234) - Executing >> encoding command: ffmpeg -strict inofficial -i >> /opt/matterhorn/felix/work/opencast/workspace/mediapackage/3175316c-f63a-4ed7-98b5-66a727f17a18/14cb05b3-787c-44a2-8c04-c0f35f4ecc90/matterhorn_1_1_0_install_video_addendum.mp4 >> -s 320x240 -r 25 -ar 44100 >> /opt/matterhorn/felix/work/opencast/workspace/mediapackage/3175316c-f63a-4ed7-98b5-66a727f17a18/14cb05b3-787c-44a2-8c04-c0f35f4ecc90/matterhorn_1_1_0_install_video_addendum-low-dl.avi >> >> 2011-06-01 15:28:37 INFO (FFmpegEncoderEngine:174) - major_brand : isom >> 2011-06-01 15:28:37 INFO (FFmpegEncoderEngine:174) - minor_version : 512 >> 2011-06-01 15:28:37 INFO (FFmpegEncoderEngine:174) - compatible_brands: >> isomiso2mp41 >> 2011-06-01 15:28:37 INFO (FFmpegEncoderEngine:174) - encoder : >> Lavf52.31.0 >> 2011-06-01 15:28:37 INFO (FFmpegEncoderEngine:174) - ISFT : >> Lavf52.64.2 >> 2011-06-01 15:28:42 INFO (AgentStateJob:104) - #66 - Sending >> >> I assume, there are parameters regarding ffmpeg for threaded >> optimization like these? >> >> root@pips03:~# ffmpeg -? | less >> Hyper fast Audio and Video encoder >> usage: ffmpeg [options] [[infile options] -i infile]... {[outfile >> options] outfile}... >> .. >> Advanced options: >> -threads count thread count >> .. >> (END) >> >> Or is there any reason why that should not be multithreaded? >> >> Greeting, [email protected] >> >> _______________________________________________ >> Matterhorn mailing list >> [email protected] >> http://lists.opencastproject.org/mailman/listinfo/matterhorn >> >> >> To unsubscribe please email >> [email protected] >> _______________________________________________ > > _______________________________________________ > Matterhorn mailing list > [email protected] > http://lists.opencastproject.org/mailman/listinfo/matterhorn > > > To unsubscribe please email > [email protected] > _______________________________________________ _______________________________________________ Matterhorn-users mailing list [email protected] http://lists.opencastproject.org/mailman/listinfo/matterhorn-users
