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fftools/ffmpeg_enc: merge -force_key_frames source/source_no_drop

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Always use the functionality of the latter, which makes more sense as it
avoids losing keyframes due to vsync code dropping frames.

Deprecate the 'source_no_drop' value, as it is now redundant.
This commit is contained in:
Anton Khirnov
2023-09-09 14:13:18 +02:00
parent 735b082231
commit d2c416fdf1
5 changed files with 20 additions and 21 deletions
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doc/ffmpeg.texi
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@@ -1060,7 +1060,6 @@ Deprecated see -bsf
@item -force_key_frames[:@var{stream_specifier}] @var{time}[,@var{time}...] (@emph{output,per-stream})
@item -force_key_frames[:@var{stream_specifier}] expr:@var{expr} (@emph{output,per-stream})
@item -force_key_frames[:@var{stream_specifier}] source (@emph{output,per-stream})
@item -force_key_frames[:@var{stream_specifier}] source_no_drop (@emph{output,per-stream})
@var{force_key_frames} can take arguments of the following form:
@@ -1121,10 +1120,6 @@ starting from second 13:
@item source
If the argument is @code{source}, ffmpeg will force a key frame if
the current frame being encoded is marked as a key frame in its source.
@item source_no_drop
If the argument is @code{source_no_drop}, ffmpeg will force a key frame if
the current frame being encoded is marked as a key frame in its source.
In cases where this particular source frame has to be dropped,
enforce the next available frame to become a key frame instead.