[XviD-devel] input format

[Tom Jacobs]

thx gruel

i think i have got the cif files sorted now and worked out how i can play
them on mplayer with the -rawvideo switch to check they are correct

one other thing....

i think this has changed in the newer version but when i do a 2pass encode,
should i set -mv to 1 with all the normal parameters and then run it with
the same parameters but with -mv set to 2? can i set -m to 0 in the first
pass? is a hint file simple created in the currect folder and read back in
on the 2nd pass?

just one more quick question       is there anyway of telling from my code
what version it is? i know it isnt the newest but it was given to be
already vectorised to i had to use it

thanks

Tom


Quoting Christoph Lampert <chl at math.uni-bonn.de>:

>
> xvid_encraw takes either "YUV within PGM" or "raw YUV" as input, you can
> specify which to use by the "-type" command line parameter. 0=yuv, 1=pgm
>
> raw YUV does't have information on frame size in them, you have to know
> it
> in advance. For "YUV within PGM" each frame has a short header with
> the framesize (and some other data) in it.
>
> raw PGM is more or less a homebrewn format, you can create files yourself
> e.g. with mplayer's pgm output (just 'cat' all output PGM into one big
> file), or with ffmpeg.
>
> raw YUV is more common for download from the internet, e.g. ".qcif" are
> raw YUV files of the fixed size 176x144 and ".cif" are 352x288 (so qcif
> is
> one _q_uarter the pixels of cif).
>
> So, if you have a .qcif file, using
>
> xvid_encraw -type 0 -w 176 -h 144 -i inputfile.qcif -o outputfile.m4v
>
> should give you useful operation, and output like
>
>
> xvid_encraw - raw mpeg4 bitstream encoder written by Christoph Lampert
> 2002-2003
>
>     0: key=2, time=      5, len=    8006 | type=I, quant=  2, len=
> 8006
>     1: key=0, time=     10, len=     507 | type=P, quant=  2, len=
> 507
>     2: key=0, time=      9, len=     410 | type=P, quant=  2, len=
> 410
>     3: key=0, time=      8, len=     344 | type=P, quant=  2, len=
> 344
>     4: key=0, time=      8, len=     318 | type=P, quant=  2, len=
> 318
> ...
>   869: key=0, time=      8, len=     284 | type=P, quant=  2, len=
> 284
>    -1: key=0, time=      0, len=      -5
> Tot: enctime(ms) =8707.51,               length(bytes) = 1008509
> Avg: enctime(ms) =  10.01, fps =  99.91, length(bytes) =    1159
>
>
> gruel
>
>
>
> On Wed, 3 Nov 2004, Tom Jacobs wrote:
> > ive got a little problem with testing my threaded encoder. i think it
> is
> > probable down to the raw images that i am paasing in. im not really
> sure
> > how to process *.yuv *.ppm and *.qcif files. i have a variety of these
> both
> > in single file or one per frame. what parameters do i use to set these
> as an
> > input? can i have the seperate files as an input or do i need to
> combine
> > them in someway. ive had various sucess doing this with the 'convert'
> tool.
> >  when i have tried to play my outputed m4v files in mplayer the colour
> is
> > wrong and the picture is not right either. you can tell the image but
> its
> > got a constant 'not rightness' to it, this is the same for both my
> encoder
> > and the xvidcore
> >
> > any help would be greatful
> >
> > thanks
> >
> > Tom
> > _______________________________________________
> > XviD-devel mailing list
> > XviD-devel at xvid.org
> > http://list.xvid.org/mailman/listinfo/xvid-devel
> >
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