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

[Raphael]

Reimar Döffinger wrote:
> Hi,
> On Wed, Mar 22, 2006 at 09:46:41PM +0000, Raphael wrote:
>   
>> Corey Hickey wrote:
>>     
>>> That's because it's not really a wave file, even though you call it
>>> one. It's still an avi file.
>>>
>>> $ mplayer k3b_image.iso -ao pcm:file=k3b.wav \
>>>   -vc null -vo null -benchmark
>>>       
> [...]
>   
>> 2) It runs very slowly and is generally rather odd. Here is the full
>> mplayer -v output attached. See how it complains that I don't have -vo
>> null etc. and then says my system is too slow to play the file!
>>     
>
> No idea about the message, but against the "runs very slowly", try the
> attached patch and use the "fast" suboption for -ao pcm.
>
>   
> ------------------------------------------------------------------------
>
> Index: libao2/ao_pcm.c
> ===================================================================
> RCS file: /cvsroot/mplayer/main/libao2/ao_pcm.c,v
> retrieving revision 1.31
> diff -u -r1.31 ao_pcm.c
> --- libao2/ao_pcm.c	9 Feb 2006 14:07:54 -0000	1.31
> +++ libao2/ao_pcm.c	25 Mar 2006 20:32:10 -0000
> @@ -27,6 +27,7 @@
>  
>  static char *ao_outputfilename = NULL;
>  static int ao_pcm_waveheader = 1;
> +static int fast = 0;
>  
>  #define WAV_ID_RIFF 0x46464952 /* "RIFF" */
>  #define WAV_ID_WAVE 0x45564157 /* "WAVE" */
> @@ -83,6 +84,7 @@
>  	opt_t subopts[] = {
>  	  {"waveheader", OPT_ARG_BOOL, &ao_pcm_waveheader, NULL},
>  	  {"file",       OPT_ARG_MSTRZ, &ao_outputfilename, NULL},
> +	  {"fast",       OPT_ARG_BOOL, &fast, NULL},
>  	  {NULL}
>  	};
>  	// set defaults
> @@ -179,7 +181,7 @@
>  static int get_space(void){
>  
>      if(vo_pts)
> -      return ao_data.pts < vo_pts ? ao_data.outburst : 0;
> +      return ao_data.pts < vo_pts + fast * 30000 ? ao_data.outburst : 0;
>      return ao_data.outburst;
>  }
>  
>   

Thanks. That seems to have sped it up. 

 time mplayer -frames 3000 k3b_image.iso -ao pcm:file=k3b.wav -vo null 
-benchmark
real    0m21.526s
user    0m0.060s
sys     0m0.032s

 time mplayer -frames 3000 k3b_image.iso -ao pcm:file=k3b.wav:fast -vo 
null -benchmark

real    0m1.894s
user    0m0.944s
sys     0m0.172s

-vc dummy is still broken of course and the warning messages still appear :)

Cheers,
Raphael