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

Fredrik Eriksson feffese at yahoo.se
Wed Mar 22 21:28:37 CET 2006

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 

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...

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