[MPlayer-users] mencoder status line

[Kichigai Mentat]

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On Jan 1, 2006, at 13.37, DaveG wrote:

> On Sunday 01 January 2006 18:47, The Wanderer wrote:
>> On 01/01/2006 07:36 AM, DaveG wrote:
>>> Could someone please point me in the direction of an explanation in
>>> the docs, or even just explain to me, the meaning of the mencoder
>>> status line?
>>>
>>> Pos: 168.1s   4640f (90%) 35fps Trem:   1min  56mb  A-V:-0.018  
>>> [2378:192]
>>>
>>> Most of it is obvious, even to me, but the last three figures after
>>> A-V I'm guessing at..
>>>
>>> The first decimal figure appears to to be counting down in
>>> thousandths, possibly duration from a keyframe or maybe A/V sync?
>>> The second two appear to relate to audio and video bitrates, the
>>> second one (192 in this case) being the audio bitrate..
>>
>> The "A-V" value is indeed A-V sync - more specifically, the time
>> difference between the audio and video streams. (I don't offhand know
>> which one is subtracted from the other to determine the value shown.)
>
> Thanks, that's useful and good to know.
I agree with this conclusion.
>
>>> Is the larger figure (2378 in the above case) the estimated bitrate
>>> for the current frame or some form of average?
>>
>> As far as I can tell, judging by observed behaviour over a number of
>> encodes (specifically the fact that the value shifts towards and
>> eventually winds up at my requested bitrate), the bracketed values  
>> are
>> current overall bitrates for the video and audio streams  
>> respectively.
>
> Again, good to know.  I'll keep an eye out and see if anyone  
> contradicts or
> supplements your answer.
Now, I have to differ here. It's been my experience that the larger  
number is the video bitrate, and the smaller number is the audio  
bitrate. A perfect way to test this is attempt to encode something  
using a CBR audio codec, like CBR MP3, AC3, or even PCM. Then encode  
that same clip without audio. It's been my experience that the larger  
number doesn't change.
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