[FFmpeg-trac] #4189(undetermined:new): webcam overlay audio desync Windows 7

FFmpeg trac at avcodec.org
Mon Dec 15 19:39:24 CET 2014

#4189: webcam overlay audio desync Windows 7
             Reporter:  Kakariko__   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 Hi im using this command. FFmpeg 32bit windows static version from

  ffmpeg -loglevel warning -rtbufsize 100000k -f dshow -i
 video="UScreenCapture" -f dshow -i video="MyWebCam" -filter_complex
 overlay_w+1:main_h-overlay_h" -f dshow -i audio="virtual-audio-capturer"
 -c:v libx264 -crf 21 -preset:v veryfast -pix_fmt yuv420p -tune film -c:a
 libmp3lame -q:a 2 -ar 44100 -threads 0 "E:\test.mkv"

 audio is ~2 seconds too fast. Tested on two laptops, tested with stereo
 mix also. Thanks for help.

Ticket URL: <https://trac.ffmpeg.org/ticket/4189>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list