[MEncoder-users] x264 file playback is too slow!

Raphael mencoder at lesshaste.plus.com
Wed Mar 22 22:07:51 CET 2006

Fredrik Eriksson wrote:
> some one wrote:
>> Hi, I'm running debian sid @ P4 2,3 GHz CPU.
>> I encoded a raw DV file to x264 using the following command:
>> mencoder -ovc x264 -oac mp3lame -aspect 4/3 -x264encopts
>> subq=6:4x4mv:8x8dct:me=3:frameref=5:bframes=3:b_pyramid:weight_b
>> -lameopts q=0:preset=insane -vf pp=ci -o mencoder.mp4 dvgrab-001.dv
>> Now when I try to play the file with mplayer, it's too slow and I get
>> this message:
>>            ************************************************
>>            **** Your system is too SLOW to play this!  ****
>>            ************************************************
>> I tried all the recommendations like:
>> -framedrop
>> -nodouble -lavdopts skiploopfilter=all
>> -nosound (with this option the slow CPU warning doesn't show up, but
>> playback is still too slow)
>> -vfm ffmpeg -lavdopts lowres=1:fast:skiploopfilter=all
>> I cut 10 secs out of the x264 file, so here I paste the link:
>> http://s53.yousendit.com/d.aspx?id=0IUHBNNSVPXIA0DGYBMN7RNU27
>> Please help me out with this.
>> why is the playback so slow? Did I do the encoding wrong or what's
>> wrong with the playback? I don't think the CPU is too slow, and it's
>> %95 idle before I play the file.
>> thanks!
>> long live mplayer + x264
> I don't have any troubles playing that clip, CPU is around 35% on my
> AMD64 3500+. I'm not sure, but I think reducing frameref might lower
> the cpu usage...
> Just for the record, setting the output filename to .mp4 doesn't make
> it a mp4 file, only a miss-labled avi file. If you want to make a mp4
> file, set -of rawvideo and -o video.264. then you can use MP4Box to
> make a mp4 file:
> MP4Box -fps 25 -add video.264 video.mp4
> you will have to encode the audio separatly though...
> ___

How do you get mencoder to output the audio in a format another audio
encoder can use?

 mencoder k3b_image.iso -oac pcm  -ovc frameno  -endpos 120 -o k3b.wav

is not usable by oggenc for example.


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