-ss and -itsoffset negative doesn' work FFMPEG

Question

This is my command line:

ffmpeg -r 30 -framerate 30 -f gdigrab -draw_mouse 0 -i title="Output" -f dshow
-i audio="CABLE Output (VB-Audio Virtual Cable)" -ss 1 -vcodec h264 -preset superfast
-pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" -profile:v baseline
-level 3.1 -x264opts "keyint=60:min-keyint=60:no-scenecut" -ab 64k -ar 44100
-maxrate 2100k -minrate 2100k -bufsize 2100k -threads 1 "C:\Users\...\Desktop\TEST.mp4"

My audio is keeping a delay of 1 second by video. It means, video came 1 second first. I was using -ss 1 as you can see, but it just doesn't change anything. I try to change to -itsoffset -1 and all the possible syntaxes for both of them, but nothing happens.

When I try to do the video delay using a positive -itsoffset, ok, but audio nope.

Anybody know why?

Answer 1

Try

ffmpeg -framerate 30 -f gdigrab -draw_mouse 0 -i title="Output" -f dshow
-i audio="CABLE Output (VB-Audio Virtual Cable)" -vcodec h264 -preset superfast
-pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" -profile:v baseline
-level 3.1 -x264opts "keyint=60:min-keyint=60:no-scenecut" -af asetpts=PTS-(1/TB) -ab 64k -ar 44100
-maxrate 2100k -minrate 2100k -bufsize 2100k -threads 1 "C:\Users\...\Desktop\TEST.mp4"

The asetpts offsets the output timestamps of the audio by 1 second so the audio is brought forward by one second relative to the input sync.