[MEncoder-users] Problem with ac3 encoding: 1 duplicate frame(s)!

[Bernd Butscheidt]

I am doing this:


mencoder -noskip -ovc x264 -speed 24000/25000 -ofps 24 -vf 
hqdn3d,softskip,harddup -x264encopts 
subq=1:frameref=3:me=hex:bframes=3:b_adapt:threads=auto:8x8dct:crf=12:b_pyramid=normal:weightp=2:keyint=250:weight_b:vbv_maxrate=40000:vbv_bufsize=30000:level_idc=41
 -channels 6 -srate 48000 -oac lavc -af lavcresample=48000 -lavcopts 
acodec=ac3:abitrate=448 -alang en,de -slang en,de -vobsubout 
Lucky#Number#Slevin#3 dvd://3 -dvd-device /dev/sr0 -of lavf -lavfopts 
format=matroska -o Lucky#Number#Slevin#3€reenc.mkv -aid 129


Using 

MEncoder SVN-r33074-4.5.2

I get endlessly "1 duplicate frame(s)!"-messages, about every 0.5s. Actually I 
stopped at about Position 30 seconds.

If I use "-lameopts cbr:br=224:aq=0:mode=1" instead of ac3-Audio or(!) switch 
back to 


MEncoder SVN-r32719-4.5.2

using the same source and calling the exactly the same options as above 
(including ac3-Audio!!!) I get 3 "Skipping frame!"-messages until position 
2.9seconds (using the older version) or 4"Skipping frame!"-messages until 
position 2.3 seconds using the new version but sticking to mp3-sound. The 
encoding continues without problems (tested so far until 3% of the whole movie). 
Although I don't know why mencoder skips frames at the beginning, this is the 
behaviour I am used too and which leads to very satisfying results.

So do newer versions of mencoder break ac3-encoding or does my simple mind 
misses something again ....


Kind regards
Bernd B.