Print encoding progress/statistics. It is on by default, to explicitly
disable it you need to specify @code{-nostats}.
+@item -stats_period @var{time} (@emph{global})
+Set period at which encoding progress/statistics are updated. Default is 0.5 seconds.
+
@item -progress @var{url} (@emph{global})
Send program-friendly progress information to @var{url}.
-Progress information is written approximately every second and at the end of
+Progress information is written periodically and at the end of
the encoding process. It is made of "@var{key}=@var{value}" lines. @var{key}
consists of only alphanumeric characters. The last key of a sequence of
progress information is always "progress".
+The update period is set using @code{-stats_period}.
+
@anchor{stdin option}
@item -stdin
Enable interaction on standard input. On by default unless standard input is
As an output option, duplicate or drop input frames to achieve constant output
frame rate @var{fps}.
+@item -fpsmax[:@var{stream_specifier}] @var{fps} (@emph{output,per-stream})
+Set maximum frame rate (Hz value, fraction or abbreviation).
+
+Clamps output frame rate when output framerate is auto-set and is higher than this value.
+Useful in batch processing or when input framerate is wrongly detected as very high.
+It cannot be set together with @code{-r}. It is ignored during streamcopy.
+
@item -s[:@var{stream_specifier}] @var{size} (@emph{input/output,per-stream})
Set frame size.
This option has been deprecated. Use the @code{aresample} audio filter instead.
+@item -adrift_threshold @var{time}
+Set the minimum difference between timestamps and audio data (in seconds) to trigger
+adding/dropping samples to make it match the timestamps. This option effectively is
+a threshold to select between hard (add/drop) and soft (squeeze/stretch) compensation.
+@code{-async} must be set to a positive value.
+
+@item -apad @var{parameters} (@emph{output,per-stream})
+Pad the output audio stream(s). This is the same as applying @code{-af apad}.
+Argument is a string of filter parameters composed the same as with the @code{apad} filter.
+@code{-shortest} must be set for this output for the option to take effect.
+
@item -copyts
Do not process input timestamps, but keep their values without trying
to sanitize them. In particular, do not remove the initial start time
ffmpeg -i video.mkv -i image.png -filter_complex 'overlay' out.mkv
@end example
+As a special exception, you can use a bitmap subtitle stream as input: it
+will be converted into a video with the same size as the largest video in
+the file, or 720x576 if no video is present. Note that this is an
+experimental and temporary solution. It will be removed once libavfilter has
+proper support for subtitles.
+
+For example, to hardcode subtitles on top of a DVB-T recording stored in
+MPEG-TS format, delaying the subtitles by 1 second:
+@example
+ffmpeg -i input.ts -filter_complex \
+ '[#0x2ef] setpts=PTS+1/TB [sub] ; [#0x2d0] [sub] overlay' \
+ -sn -map '#0x2dc' output.mkv
+@end example
+(0x2d0, 0x2dc and 0x2ef are the MPEG-TS PIDs of respectively the video,
+audio and subtitles streams; 0:0, 0:3 and 0:7 would have worked too)
+
To generate 5 seconds of pure red video using lavfi @code{color} source:
@example
ffmpeg -filter_complex 'color=c=red' -t 5 out.mkv
@item -thread_queue_size @var{size} (@emph{input})
This option sets the maximum number of queued packets when reading from the
file or device. With low latency / high rate live streams, packets may be
-discarded if they are not read in a timely manner; raising this value can
-avoid it.
+discarded if they are not read in a timely manner; setting this value can
+force ffmpeg to use a separate input thread and read packets as soon as they
+arrive. By default ffmpeg only do this if multiple inputs are specified.
@item -sdp_file @var{file} (@emph{global})
Print sdp information for an output stream to @var{file}.
No packets were passed to the muxer in some of the output streams.
@end table
+@item -max_error_rate (@emph{global})
+Set fraction of decoding frame failures across all inputs which when crossed
+ffmpeg will return exit code 69. Crossing this threshold does not terminate
+processing. Range is a floating-point number between 0 to 1. Default is 2/3.
+
@item -xerror (@emph{global})
Stop and exit on error
The default value of this option should be high enough for most uses, so only
touch this option if you are sure that you need it.
-@end table
-
-As a special exception, you can use a bitmap subtitle stream as input: it
-will be converted into a video with the same size as the largest video in
-the file, or 720x576 if no video is present. Note that this is an
-experimental and temporary solution. It will be removed once libavfilter has
-proper support for subtitles.
+@item -muxing_queue_data_threshold @var{bytes} (@emph{output,per-stream})
+This is a minimum threshold until which the muxing queue size is not taken into
+account. Defaults to 50 megabytes per stream, and is based on the overall size
+of packets passed to the muxer.
+
+@item -auto_conversion_filters (@emph{global})
+Enable automatically inserting format conversion filters in all filter
+graphs, including those defined by @option{-vf}, @option{-af},
+@option{-filter_complex} and @option{-lavfi}. If filter format negotiation
+requires a conversion, the initialization of the filters will fail.
+Conversions can still be performed by inserting the relevant conversion
+filter (scale, aresample) in the graph.
+On by default, to explicitly disable it you need to specify
+@code{-noauto_conversion_filters}.
-For example, to hardcode subtitles on top of a DVB-T recording stored in
-MPEG-TS format, delaying the subtitles by 1 second:
-@example
-ffmpeg -i input.ts -filter_complex \
- '[#0x2ef] setpts=PTS+1/TB [sub] ; [#0x2d0] [sub] overlay' \
- -sn -map '#0x2dc' output.mkv
-@end example
-(0x2d0, 0x2dc and 0x2ef are the MPEG-TS PIDs of respectively the video,
-audio and subtitles streams; 0:0, 0:3 and 0:7 would have worked too)
+@end table
@section Preset files
A preset file contains a sequence of @var{option}=@var{value} pairs,
@ifset config-avfilter
@include filters.texi
@end ifset
+@include general_contents.texi
@end ifset
@chapter See Also
projects / ffmpeg / blobdiff