[MPlayer-users] encode2mpeg 0.3.1 possible bug but encoding OK

[Giacomo Comes]

> >
> >Will your new muxer be able to mux ac3 audio?
> 
> it's already possible and working
> 
> >And LPCM (lower priority compared to ac3)?
> >
> >Giacomo
> 
> to say the truth it has no proriority at the moment :)

Nico,
I have other requests/suggestions for your new
muxer. Please see what you can do :-).

1) add the possibility to set the "pulldown" flag
like the -p option of mpeg2enc

2) add the possibility to split the final mpeg
stream at a specified value. Usually 700Mb or 800Mb.
This is not required for DVD stream, but it is 
necessary vor SVCD/VCD

3) Currently is not possible to set for the mpegs
the aspect ratio 1:1 if the video has resolution 720x480
In this case an aspect of 4/3 is set
(this is more a bug of the current code than a new feature
for your new muxer)

4) This is a general questiom about mpeg streams.
Consider this simple command line:
mencoder  -of mpeg -ovc lavc -o TEST.mpg dvd://1 -ofps 30000/1001 -vf harddup -oac copy \
  -lavcopts vcodec=mpeg2video:vbitrate=7500:aspect=16/9:vrc_buf_size=1835

the mpeg will have an AVERAGE video bit rate of 7500
When I play the resulting mpeg with MPlayer I see:
	VIDEO:  MPEG2  720x480  (aspect 3)  29.970 fps    0.0 kbps ( 0.0 kbyte/s)
this means variable bit rate (not 7500)

if I add the libavcodec option vrc_maxrate=7500 then MPlayer shows:
	VIDEO:  MPEG2  720x480  (aspect 3)  29.970 fps  7500.0 kbps (937.5 kbyte/s)

But now the actual video bit rate is not 7500. That's the maximum.
The average bit rate is lower.

All the commercial DVD I have seen always shows a number in the bit rate field
when played with MPlayer.
This means that I need to add ALWAYS the option vrc_maxrate or there is another
way to "set" in the stream the bitrate?

Giacomo