Hello, We are testing ffmpeg in our compression pipeline as our commercial software does not provide the functionality we need. We run a multithreaded compression (ffmpeg multithreading isn't used, our own solution is) using the following command: ffmpeg -i #input# -f mp4 -vcodec libx264 -s 1024x576 -b:v 2000k -g 33 -acodec libmp3lame -b:a 128k -ar 44100 -vf "movie=#logo# [wm]; [in][wm] overlay=10:main_h-overlay_h-10 [out]" -y #output# Approx. 75% threads complete without any problems, the remaining ones get stuck - cpu usage on each thread drops to 0, memory usage gets stuck at around 300MB. Initially we used aac and libvo_aacenc coders for audio, but the hangs seemed more frequent. Tested on a few recent ffmpeg builds, including the one compiled on 20/07. Any help would be greatly appreciated. Many thanks, Luke -- *Luke Niejadlik* Audiomotion Studios Ltd. T: +44 (0)8701 600 504 F: +44 (0)1865 725 651 www.audiomotion.com <http://www.audiomotion.com/> Develop Awards - Best Services Winner 2011, 2009 & 2004 */JOIN THE MOVEMENT!/* - www.facebook.com/audiomotion.studios <http://www.facebook.com/audiomotion.studios> - twitter.com/audiomotion <http://twitter.com/audiomotion> - http://www.join-the-movement.co.uk/