FFmpeg Desktop Recordings: Solving Video Sync/Frame Drop Problems

If the audio and video of your desktop recordings are falling out of sync and you're already using the "asyncts" filter to keep your audio in line, video frame drops may be to blame instead. This presentation covers diagnosing and resolving such problems, along with tips and examples featuring Tribes 2, my all-time favorite FPS. NB: This video is ~54 minutes long. If you find it too daunting for your attention span, take breaks, then come back and finish watching so nothing of importance is missed. I ain't as concise as I could be, but I try to be thorough. ;-) "Big Buck Bunny" - CC-BY Blender Foundation 2008: http://www.bigbuckbunny.org Changes for the 60fps Sunflower version - CC-BY Janus B. Kristensen 2013: http://bbb3d.renderfarming.net Excerpts used under Creative Commons by Attribution 3.0: http://creativecommons.org/licenses/b... Tribes 2 info: Original copyright (C) 2000, Sierra On-Line, Inc. (currently SIERRA, a division of Activision Publishing, Inc.) In May of 2004, Sierra released Tribes 2 and its predecessor, Starsiege: Tribes, as freeware downloads. Both games are still available for free online, and Tribes 2 (specifically) can be downloaded from http://www.tribesnext.com Half-Life 2: Lost Coast and Steam are (C) Valve Corporation If you're interested in Linux-compatible USB 3.0 HD video capture units, check the following: INOGENI HDMI/DVI-D to USB 3.0: http://inogeni.com/ Magewell XI100DUSB-HDMI: http://www.amazon.com/gp/product/B00I... Sample FFmpeg Desktop Recording Script used to Create this Video: ------ FFREPORT=file=/media/Storage/Videos/DesktopRecordings/[FILENAME].log:level=32 \ ffmpeg \ -f pulse -channels 2 -sample_rate 44100 -i alsa_input.usb-BLUE_MICROPHONE_Blue_Snowball_201306-00.analog-stereo \ -f pulse -channels 2 -sample_rate 44100 -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor \ -thread_queue_size 64 -f x11grab -draw_mouse 0 -r 60 -video_size 1920x1080 -i :0 \ -filter_complex "[0]asyncts[m],[1]asyncts[d],[m][d]amix" \ -c:v libx264 -preset superfast -crf 18 -pix_fmt yuv420p \ -c:a libmp3lame -ac 2 -ar 44100 -b:a 320k \ /media/Storage/Videos/DesktopRecordings/[FILENAME].mkv ------