[MEncoder-users] Specifying ranges on multiple input files (was Re: How to specify an action range in mencoder?)

[Enzo]

Dear Guillaume,

thank you very much. Sorry that I did not RTFM first!

Now, if I may ask your help again (after having RTFM'ed and checked for
the feature ;-) :

Would it be possible to run mencoder specifying more than an input file
and, for each of them, specifying an (-ss, -endpos) couple?

I mean, something like this:

mencoder -ovc /somecodec/ -o output.h264 -ss 2:48 -endpos 55:00
input1.mpg -ss 1:12 -endpos 55:02  input2.mpg -ss 3:55 -endpos 54:58
input3.mpg

whose semantics should be "run mencoder on input1.mpg, starting at
2'48'' and for 55'; then continue with input2.mpg, starting at 1'12''
and for 55'02''; then continue with input3.mpg, starting at 3'55'' and
for 54'58''."

I think the one above would be an interesting extra feature for mencoder
-- if it is actually missing, I mean.

Thanks for your tips!

Cheers,

Enzo.

> Oggetto:
> Re: [MEncoder-users] How to specify an action range in mencoder?
> Da:
> "Guillaume POIRIER" <poirierg at gmail.com>
> Data:
> Thu, 2 Nov 2006 16:08:11 +0100
> A:
> "MEncoder usage discussions" <mencoder-users at mplayerhq.hu>
>
> A:
> "MEncoder usage discussions" <mencoder-users at mplayerhq.hu>
>
>
> Hi,
>
> On 11/2/06, Enzo <v.deflorio at katamail.com> wrote:
>> Dear all,
>>
>> how can I specify a range for mencoder ? I would like to encode an mpeg2
>> into an mpeg4 skipping the first few seconds and stopping at given time
>> t. How may I do this? Thank you very much,
>
> RTFM: -ss, sb, -chapter
>
> Guillaume
>
> ------------------------------------------------------------------------
>
> Oggetto:
> Re: [MEncoder-users] undersized x264 encodes?
> Da:
> "Scott Zadigian" <scott.zadigian at gmail.com>
> Data:
> Thu, 2 Nov 2006 10:12:32 -0500
> A:
> "MEncoder usage discussions" <mencoder-users at mplayerhq.hu>
>
> A:
> "MEncoder usage discussions" <mencoder-users at mplayerhq.hu>
>
>
> Thanks for all the tips!
>
> It looks like it was an issue with the build I was using because when I
> switched to the binary 1.0rc1 on the official website I was getting
> properly
> sized output files.
>
> Also thanks for pointing me to the IVTC.  I don't think it had
> anything to
> do with this problem, but its something I should know about anyway.
>
>
> ------------------------------------------------------------------------
>
> Oggetto:
> Re: [MEncoder-users] Decoding h.264 issues
> Da:
> Xi Chen <xichen71 at 163.com>
> Data:
> Thu, 02 Nov 2006 18:27:23 -0700
> A:
> MEncoder usage discussions <mencoder-users at mplayerhq.hu>
>
> A:
> MEncoder usage discussions <mencoder-users at mplayerhq.hu>
>
>
> Lukas Österreicher wrote:
>>>> Is there a way to tell mencoder to use another direct show decoder
>>>> such as one of the mentioned ones,       
>>
>>   
> Try mplayer -vfm dshow,vfw if you have a dshow or vfw h264 codec. If
> you have ffdshow installed, you may want to specify the codec by
> -codecs-file <file name>. Use mplayer -vfm help to get a list of
> codecs (for decoder).
>
>
>
>
> ------------------------------------------------------------------------
>
> Oggetto:
> Re: [MEncoder-users] What's the special about the I-frames in libavcodec?
> Da:
> Xi Chen <xichen71 at 163.com>
> Data:
> Thu, 02 Nov 2006 18:59:06 -0700
> A:
> MEncoder usage discussions <mencoder-users at mplayerhq.hu>
>
> A:
> MEncoder usage discussions <mencoder-users at mplayerhq.hu>
>
>
> Pepe wrote:
>>
>>> Try to use keyint with a lower value. May be the default (250) is
>>> too high
>>> for your player. The manual suggest <=132 for a strict MPEG-1/2/4
>>> compliance.
>>>     
>>
>> I've just tried with keyint=100 and then keyint=10. Nothing changed.
>> The same result :-(
>>
>>   
> Just a wild guess. Is it possible that your dvd player requires your
> mpeg4 files to have closed GOP? xvid defaults to cgop but lavc does
> not. Try to add -lavcopts cgop:sc_threshold=1000000000
>
> The second option disables the scene detection since lavc does not
> support cgop with scene detection atm.
>
> ------------------------------------------------------------------------
>
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