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decklink: Only use drop-frame flag for 29.97 and 59.94 FPS

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Otherwise it can cause errors in gstvideotimecode.c because drop-frame
is not defined for any other frame rate (e.g. 24000/101)

https://blog.frame.io/2017/07/17/timecode-and-frame-rates/

https://bugzilla.gnome.org/show_bug.cgi?id=797037
This commit is contained in:
Vivia Nikolaidou 2018-08-28 15:04:53 +03:00
parent 962ca01596
commit 4ca76e0c12
1 changed files with 16 additions and 4 deletions
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14
sys/decklink/gstdecklinkvideosrc.cpp
View file

@ -758,10 +758,22 @@ gst_decklink_video_src_got_frame (GstElement * element,
flags =
(GstVideoTimeCodeFlags) (flags |
GST_VIDEO_TIME_CODE_FLAGS_INTERLACED);
if (bmode->fps_d == 1001 && (bmode->fps_n == 30000 || bmode->fps_n == 60000))
if (bmode->fps_d == 1001) {
if (bmode->fps_n == 30000 || bmode->fps_n == 60000) {
/* Some occurrences have been spotted where the driver mistakenly
* fails to set the drop-frame flag for drop-frame timecodes.
* Assume always drop-frame for 29.97 and 59.94 FPS */
flags =
(GstVideoTimeCodeFlags) (flags |
GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME);
} else {
/* Drop-frame isn't defined for any other framerates (e.g. 23.976)
* */
flags =
(GstVideoTimeCodeFlags) (flags &
~GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME);
}
}
f.tc =
gst_video_time_code_new (bmode->fps_n, bmode->fps_d, NULL, flags,
hours, minutes, seconds, frames, field_count);