lavd/lavfi: allow to extract subcc.

Signed-off-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 14 insertions, 0 deletions

diff --git a/doc/indevs.texi b/doc/indevs.texi
index ad823abad4..abc4cc3944 100644
--- a/doc/indevs.texi
+++ b/doc/indevs.texi
@@ -495,6 +495,14 @@ generated by the device.
 The first unlabelled output is automatically assigned to the "out0"
 label, but all the others need to be specified explicitly.
 
+The suffix "+subcc" can be appended to the output label to create an extra
+stream with the closed captions packets attached to that output
+(experimental; only for EIA-608 / CEA-708 for now).
+The subcc streams are created after all the normal streams, in the order of
+the corresponding stream.
+For example, if there is "out19+subcc", "out7+subcc" and up to "out42", the
+stream #43 is subcc for stream #7 and stream #44 is subcc for stream #19.
+
 If not specified defaults to the filename specified for the input
 device.
 
@@ -541,6 +549,12 @@ Read an audio stream and a video stream and play it back with
 ffplay -f lavfi "movie=test.avi[out0];amovie=test.wav[out1]"
 @end example
 
+@item
+Dump decoded frames to images and closed captions to a file (experimental):
+@example
+ffmpeg -f lavfi -i "movie=test.ts[out0+subcc]" -map v frame%08d.png -map s -c copy -f rawvideo subcc.bin
+@end example
+
 @end itemize
 
 @section libcdio