[MEncoder-users] help: first frame is no key frame

[Sangeetha M]

I have captured video using mencoder. I have used ffmpeg to cut the
video. When I cut the clips, some clips are showing error "first frame
is no key frame". For that clips, the starting sec the video is blurred.

 

Mencoder command:

 

mencoder -tv input=2:width=768:height=576 tv://0  -oac lavc -ovc lavc
-of mpeg -vf scale=720:576,pp=ci,harddup -srate 24000 -af
lavcresample=24000 -lavcopts
vcodec=mpeg2video:vbitrate=500:keyint=15:vstrict=0:acodec=ac3:abitrate=6
4:aspect=4/3 -ofps 25 -o d:\movie.mp4

 

ffmpeg command to cut the video:

 

ffmpeg -ss 40 -t 10 -i d:\movie.mp4 -s 320x240  -b 500k -r 25 -vcodec
mpeg4 -acodec libfaac -ab 64k -ac 1 -ar 24000 -vol 1024 -qscale 1
-benchmark -y d:\clips\clip1.mp4

 

How to solve this?