[FFmpeg-devel] [PATCH] Extend show_pix_fmts() to make it print the input/output support

[Stefano Sabatini]

On date Wednesday 2010-02-03 02:02:34 +0100, Stefano Sabatini encoded:
> On date Wednesday 2010-02-03 01:31:18 +0100, Michael Niedermayer encoded:
> > On Wed, Feb 03, 2010 at 12:46:30AM +0100, Stefano Sabatini wrote:
> > > On date Saturday 2010-01-30 16:54:08 +0100, Stefano Sabatini encoded:
> > > > Hi, as in subject.
> > > [...]
> > > 
> > > Ping.
> > 
> > the patch looks hakish but do as you see fit
> 
> Yes I have the very same feeling, what about having something on the
> line of -codecs:
> 
> Pixel formats:
>  FLAGS NAME       NB_CHANNELS  DEPTH 
>  I.. = Input conversion supported
>  .O. = Output conversion supported
>  ..A = Alpha plane
>  ------
>  IO    yuv420p         3         8
>  IO    yuyv422         1         8
>  IO    rgb24           3         8
>  IO    bgr24           3         8
> ...

Like in the attached, output issued:
ffmpeg -pix_fmts 
Pixel formats:
I.... = Input  supported for conversion
.O... = Output supported for conversion
..H.. = Hardware accelerated format
...P. = Paletted format
....B = Bitstream format
FLAGS NAME            NB_COMPONENTS  BITS_PER_PIXEL
-----
IO... yuv420p                3            12
IO... yuyv422                3            16
IO... rgb24                  3            24
IO... bgr24                  3            24
IO... yuv422p                3            16
IO... yuv444p                3            24
IO... yuv410p                3             9
IO... yuv411p                3            12
IO... gray                   1             8
IO..B monow                  1             1
IO..B monob                  1             1
I..P. pal8                   1             8
IO... yuvj420p               3            12
IO... yuvj422p               3            16
IO... yuvj444p               3            24
..H.. xvmcmc                 0             0
[...]

The output is designed to be easily parsable, that's why I preferred
for example to skip the " " at the beginning and use '.' to fill the
flags sequence.

For example:
# list all the formats supported as input and not as output and their nb of pixels
ffmpeg -pix_fmt list | sed -ne '9,$p' | grep '^I\.' | tr -s " " | cut -d" " -f2,3

I suggested other times to print the header on stderr rather than on
stdout, this would avoid the sed command.

Regards.
-- 
FFmpeg = Fantastic & Fostering Mean Puritan Enhanced Gargoyle
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