[FFmpeg-devel] [PATCH] lavd/v4l2: add list_standards option

[Giorgio Vazzana]

Hi,

this patch adds the 'list_standards' option, which prints a table like this:

$ ./ffplay -f video4linux2 -channel 0 -list_standards all /dev/video0
ffplay version N-49406-gac5b948 Copyright (c) 2003-2013 the FFmpeg developers
  built on Jan 29 2013 12:52:03 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)
  configuration: --enable-gpl --enable-x11grab --enable-libxvid
--enable-libmp3lame --enable-libtheora --enable-libvorbis
--enable-libopus --enable-libvpx --enable-libx264
  libavutil      52. 17.100 / 52. 17.100
  libavcodec     54. 91.100 / 54. 91.100
  libavformat    54. 61.104 / 54. 61.104
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 34.101 /  3. 34.101
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[video4linux2,v4l2 @ 0x2055ea0] Std:  0, 0x000000000000b000, NTSC
[video4linux2,v4l2 @ 0x2055ea0] Std:  1, 0x0000000000001000, NTSC-M
[video4linux2,v4l2 @ 0x2055ea0] Std:  2, 0x0000000000002000, NTSC-M-JP
[video4linux2,v4l2 @ 0x2055ea0] Std:  3, 0x0000000000008000, NTSC-M-KR
[video4linux2,v4l2 @ 0x2055ea0] Std:  4, 0x00000000000000ff, PAL
[video4linux2,v4l2 @ 0x2055ea0] Std:  5, 0x0000000000000007, PAL-BG
[video4linux2,v4l2 @ 0x2055ea0] Std:  6, 0x0000000000000008, PAL-H
[video4linux2,v4l2 @ 0x2055ea0] Std:  7, 0x0000000000000010, PAL-I
[video4linux2,v4l2 @ 0x2055ea0] Std:  8, 0x00000000000000e0, PAL-DK
[video4linux2,v4l2 @ 0x2055ea0] Std:  9, 0x0000000000000100, PAL-M
[video4linux2,v4l2 @ 0x2055ea0] Std: 10, 0x0000000000000200, PAL-N
[video4linux2,v4l2 @ 0x2055ea0] Std: 11, 0x0000000000000400, PAL-Nc
[video4linux2,v4l2 @ 0x2055ea0] Std: 12, 0x0000000000000800, PAL-60
[video4linux2,v4l2 @ 0x2055ea0] Std: 13, 0x0000000000ff0000, SECAM
[video4linux2,v4l2 @ 0x2055ea0] Std: 14, 0x0000000000010000, SECAM-B
[video4linux2,v4l2 @ 0x2055ea0] Std: 15, 0x0000000000040000, SECAM-G
[video4linux2,v4l2 @ 0x2055ea0] Std: 16, 0x0000000000080000, SECAM-H
[video4linux2,v4l2 @ 0x2055ea0] Std: 17, 0x0000000000320000, SECAM-DK
[video4linux2,v4l2 @ 0x2055ea0] Std: 18, 0x0000000000400000, SECAM-L
[video4linux2,v4l2 @ 0x2055ea0] Std: 19, 0x0000000000800000, SECAM-Lc
/dev/video0: Immediate exit requested

Useful / not useful?

Regards,
Giorgio Vazzana
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