The OpenNET Project / Index page

[ новости /+++ | форум | теги | ]

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

y4mcolorbars (1)
  • >> y4mcolorbars (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  •  

    NAME

    y4mcolorbars - Create a YUV4MPEG2 stream containing a colorbar test pattern
    

     

    SYNOPSIS

    y4mcolorbars [options]

     

    DESCRIPTION

    y4mcolorbars creates a YUV4MPEG2 stream consisting entirely of frames containing a colorbar test pattern. This stream is ready for further processing by the mpeg2enc(1) MPEG encoder and image processing filters like yuvscaler(1).

    Output is to stdout to facilitate piping to other MJPEG tools.

     

    OPTIONS

    y4mcolorbars accepts the following options:

    -n num
    Output a total of 'num' output frames. (default: 1)
    -F n:d
    Set framerate encoded in output stream, as an exact integer ratio. (default: 30000:1001) Common rates are:
     24000:1001 - NTSC 3:2 pulldown converted film
           24:1 - native film
           25:1 - PAL/SECAM
     30000:1001 - NTSC video
           50:1 - PAL field rate
     60000:1001 - NTSC field rate
    -W w
    Set frame width. (default: 720)
    -H h
    Set frame height. (default: 480)
    -A n:d
    Set pixel aspect ratio encoded in output stream, as an exact integer ratio. (default: 10:11) Common ratios are:
         1:1  - square pixels (computer graphics)
        10:11 - CCIR-601 NTSC
        59:54 - CCIR-601 PAL
    -I x
    Set interlacing mode, used to interpret the PPM image(s), and also encoded in output stream. (default: 'p')
     p - progressive, non-interlaced
     t - top/upper-field-first interlaced
     b - bottom/lower-field-first interlaced
    -S mode
    Set chroma subsampling mode. (default: 420_jpeg)
      420_jpeg - 4:2:0 JPEG/MPEG-1, interstitial cositing 
     420_mpeg2 - 4:2:0 MPEG-2, horizontal cositing

    Changing the subsampling mode from the default won't necessarily make anything better. This option is just for experimenting.

    -v [0,1,2]
    Set verbosity level.
     0 = warnings and errors only.
     1 = add informative messages, too.
     2 = add chatty debugging message, too.

     

    EXAMPLES

    To create and display 200 frames of colorbars corresponding to a top-field-first interlaced 4:3 NTSC source:

    y4mcolorbars -n 200 -It | yuvplay

    To create and display 200 frames of colorbars corresponding to a bottom-field-first interlaced 4:3 PAL source:

    y4mcolorbars -n 200 -H 576 -F 25:1 -A 59:54 -Ib | yuvplay

     

    AUTHOR

    This man page was written by Matt Marjanovic.
    If you have questions, remarks, problems or you just want to contact the developers, the main mailing list for the MJPEG-tools is:
      [email protected]

    For more info, see our website at
    http://mjpeg.sourceforge.net

     

    SEE ALSO

    mjpegtools(1), mpeg2enc(1), yuvscaler(1), yuv2lav(1), yuvplay(1)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    EXAMPLES
    AUTHOR
    SEE ALSO


    Поиск по тексту MAN-ов: 




    Партнёры:
    PostgresPro
    Inferno Solutions
    Hosting by Hoster.ru
    Хостинг:

    Закладки на сайте
    Проследить за страницей
    Created 1996-2024 by Maxim Chirkov
    Добавить, Поддержать, Вебмастеру