diff options
Diffstat (limited to 'doc/indevs.texi')
| -rw-r--r-- | doc/indevs.texi | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/doc/indevs.texi b/doc/indevs.texi index 330617a7c9..09e33216dc 100644 --- a/doc/indevs.texi +++ b/doc/indevs.texi @@ -245,13 +245,19 @@ of uyvy422. Not all Blackmagic devices support this option. @item teletext_lines If set to nonzero, an additional teletext stream will be captured from the -vertical ancillary data. This option is a bitmask of the VBI lines checked, -specifically lines 6 to 22, and lines 318 to 335. Line 6 is the LSB in the mask. -Selected lines which do not contain teletext information will be ignored. You -can use the special @option{all} constant to select all possible lines, or -@option{standard} to skip lines 6, 318 and 319, which are not compatible with all -receivers. Capturing teletext only works for SD PAL sources. To use this -option, ffmpeg needs to be compiled with @code{--enable-libzvbi}. +vertical ancillary data. Both SD PAL (576i) and HD (1080i or 1080p) +sources are supported. In case of HD sources, OP47 packets are decoded. + +This option is a bitmask of the SD PAL VBI lines captured, specifically lines 6 +to 22, and lines 318 to 335. Line 6 is the LSB in the mask. Selected lines +which do not contain teletext information will be ignored. You can use the +special @option{all} constant to select all possible lines, or +@option{standard} to skip lines 6, 318 and 319, which are not compatible with +all receivers. + +For SD sources, ffmpeg needs to be compiled with @code{--enable-libzvbi}. For +HD sources, on older (pre-4K) DeckLink card models you have to capture in 10 +bit mode. @item channels Defines number of audio channels to capture. Must be @samp{2}, @samp{8} or @samp{16}. |