[MEncoder-users] Help with mencoder

[JD]

On 04/26/2013 11:55 PM, Gabri Shally wrote:
> On Apr 27, 2013 12:38 PM, "JD" <jd1008 at gmail.com> wrote:
>>
>> You are exposing the fact that I am not a media savvy person.
>>
> well, so do i... it just that i frequently use mencoder to reduce the size
> of my video collection, so i try to learn option to maximize quality.
>
>> I used ffplay to play it so that I could see what the bitrate is.
>> It turns out it is not 8000Kbits/s, it shows 32Mbits/s :
>>
>> I played whatever mencoder has written so far (not much though)
>> and ffplay shows:
>> .
>> .
>> Duration: 00:00:01.85, start: 0.000000, bitrate: 32034 kb/s
>>
>> Why? That's such an overkill, and I certainly did not request it in the
> arguments?
> it maybe because the video is too sort, so the encoder cannot decide the
> bitrate properly. altough you're setting bitrate, actually the bitrate
> still vary. if you are really forcing a constant bitrate, at the expense of
> quality, add vbv_maxrate
>
> -x264encopts bitrate=8000,vbv_maxrate=8000
> _______________________________________________
>
I restarted the encoding with your change and ffplay now shows more like 
what  I wanted:

Input #0, avi, from 'Zach_all.avi':
   Metadata:
     encoder         : MEncoder svn r34540 (Ubuntu), built with gcc-4.7
   Duration: 00:00:01.85, start: 0.000000, bitrate: 7928 kb/s
     Stream #0:0: Video: h264 (High) (h264 / 0x34363268), yuv420p, 
480x270 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 29.97 tbn, 59.94 tbc
     Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 22050 Hz, stereo, 
s16, 160 kb/s

Thank you very very much!!

Best regards,

JD