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author | Anton Khirnov <anton@khirnov.net> | 2011-09-12 21:03:52 +0200 |
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committer | Anton Khirnov <anton@khirnov.net> | 2011-09-27 15:26:35 +0200 |
commit | d159060a87355833723389b357f8489cca022919 (patch) | |
tree | 68bcdb0fe145dc7eb32c83ae2353bf21c52b9927 /doc/avconv.texi | |
parent | 5aa3fcec3509da8fb202fb5fa4d0a560326c41c0 (diff) | |
download | ffmpeg-streaming-d159060a87355833723389b357f8489cca022919.zip ffmpeg-streaming-d159060a87355833723389b357f8489cca022919.tar.gz |
doc/avconv: expand documentation for some options.
Diffstat (limited to 'doc/avconv.texi')
-rw-r--r-- | doc/avconv.texi | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/doc/avconv.texi b/doc/avconv.texi index 2cfed01..d585db8 100644 --- a/doc/avconv.texi +++ b/doc/avconv.texi @@ -82,13 +82,15 @@ described. @table @option @item -f @var{fmt} (@emph{input/output}) -Force format. +Force input or output file format. The format is normally autodetected for input +files and guessed from file extension for output files, so this option is not +needed in most cases. @item -i @var{filename} (@emph{input}) input file name @item -y (@emph{global}) -Overwrite output files. +Overwrite output files without asking. @item -c[:@var{stream_specifier}] @var{codec} (@emph{input/output,per-stream}) @itemx -codec[:@var{stream_specifier}] @var{codec} (@emph{input/output,per-stream}) @@ -111,9 +113,8 @@ will copy all the streams except the second video, which will be encoded with libx264, and the 138th audio, which will be encoded with libvorbis. @item -t @var{duration} (@emph{output}) -Restrict the transcoded/captured video sequence -to the duration specified in seconds. -@code{hh:mm:ss[.xxx]} syntax is also supported. +Stop writing the output after its duration reaches @var{duration}. +@var{duration} may be a number in seconds, or in @code{hh:mm:ss[.xxx]} form. @item -fs @var{limit_size} (@emph{output}) Set the file size limit. @@ -131,7 +132,7 @@ Set the input time offset in seconds. @code{[-]hh:mm:ss[.xxx]} syntax is also supported. The offset is added to the timestamps of the input files. Specifying a positive offset means that the corresponding -streams are delayed by 'offset' seconds. +streams are delayed by @var{offset} seconds. @item -metadata[:metadata_specifier] @var{key}=@var{value} (@emph{output,per-metadata}) Set a metadata key/value pair. @@ -158,9 +159,10 @@ This option is deprecated and has no effect, use -loglevel to set verbosity level. @item -target @var{type} (@emph{output}) -Specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd", -"ntsc-svcd", ... ). All the format options (bitrate, codecs, -buffer sizes) are then set automatically. You can just type: +Specify target file type (@code{vcd}, @code{svcd}, @code{dvd}, @code{dv}, +@code{dv50}). @var{type} may be prefixed with @code{pal-}, @code{ntsc-} or +@code{film-} to use the corresponding standard. All the format options +(bitrate, codecs, buffer sizes) are then set automatically. You can just type: @example avconv -i myfile.avi -target vcd /tmp/vcd.mpg @@ -650,7 +652,7 @@ it will usually display as 0 if not supported. @item -timelimit @var{duration} (@emph{global}) Exit after avconv has been running for @var{duration} seconds. @item -dump (@emph{global}) -Dump each input packet. +Dump each input packet to stderr. @item -hex (@emph{global}) When dumping packets, also dump the payload. @item -ps @var{size} |