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diff --git a/ffmpeg1/doc/demuxers.texi b/ffmpeg1/doc/demuxers.texi deleted file mode 100644 index fc50871..0000000 --- a/ffmpeg1/doc/demuxers.texi +++ /dev/null @@ -1,311 +0,0 @@ -@chapter Demuxers -@c man begin DEMUXERS - -Demuxers are configured elements in FFmpeg which allow to read the -multimedia streams from a particular type of file. - -When you configure your FFmpeg build, all the supported demuxers -are enabled by default. You can list all available ones using the -configure option @code{--list-demuxers}. - -You can disable all the demuxers using the configure option -@code{--disable-demuxers}, and selectively enable a single demuxer with -the option @code{--enable-demuxer=@var{DEMUXER}}, or disable it -with the option @code{--disable-demuxer=@var{DEMUXER}}. - -The option @code{-formats} of the ff* tools will display the list of -enabled demuxers. - -The description of some of the currently available demuxers follows. - -@section applehttp - -Apple HTTP Live Streaming demuxer. - -This demuxer presents all AVStreams from all variant streams. -The id field is set to the bitrate variant index number. By setting -the discard flags on AVStreams (by pressing 'a' or 'v' in ffplay), -the caller can decide which variant streams to actually receive. -The total bitrate of the variant that the stream belongs to is -available in a metadata key named "variant_bitrate". - -@anchor{concat} -@section concat - -Virtual concatenation script demuxer. - -This demuxer reads a list of files and other directives from a text file and -demuxes them one after the other, as if all their packet had been muxed -together. - -The timestamps in the files are adjusted so that the first file starts at 0 -and each next file starts where the previous one finishes. Note that it is -done globally and may cause gaps if all streams do not have exactly the same -length. - -All files must have the same streams (same codecs, same time base, etc.). - -The duration of each file is used to adjust the timestamps of the next file: -if the duration is incorrect (because it was computed using the bit-rate or -because the file is truncated, for example), it can cause artifacts. The -@code{duration} directive can be used to override the duration stored in -each file. - -@subsection Syntax - -The script is a text file in extended-ASCII, with one directive per line. -Empty lines, leading spaces and lines starting with '#' are ignored. The -following directive is recognized: - -@table @option - -@item @code{file @var{path}} -Path to a file to read; special characters and spaces must be escaped with -backslash or single quotes. - -All subsequent directives apply to that file. - -@item @code{ffconcat version 1.0} -Identify the script type and version. It also sets the @option{safe} option -to 1 if it was to its default -1. - -To make FFmpeg recognize the format automatically, this directive must -appears exactly as is (no extra space or byte-order-mark) on the very first -line of the script. - -@item @code{duration @var{dur}} -Duration of the file. This information can be specified from the file; -specifying it here may be more efficient or help if the information from the -file is not available or accurate. - -If the duration is set for all files, then it is possible to seek in the -whole concatenated video. - -@end table - -@subsection Options - -This demuxer accepts the following option: - -@table @option - -@item safe -If set to 1, reject unsafe file paths. A file path is considered safe if it -does not contain a protocol specification and is relative and all components -only contain characters from the portable character set (letters, digits, -period, underscore and hyphen) and have no period at the beginning of a -component. - -If set to 0, any file name is accepted. - -The default is -1, it is equivalent to 1 if the format was automatically -probed and 0 otherwise. - -@end table - -@section image2 - -Image file demuxer. - -This demuxer reads from a list of image files specified by a pattern. -The syntax and meaning of the pattern is specified by the -option @var{pattern_type}. - -The pattern may contain a suffix which is used to automatically -determine the format of the images contained in the files. - -The size, the pixel format, and the format of each image must be the -same for all the files in the sequence. - -This demuxer accepts the following options: -@table @option -@item framerate -Set the framerate for the video stream. It defaults to 25. -@item loop -If set to 1, loop over the input. Default value is 0. -@item pattern_type -Select the pattern type used to interpret the provided filename. - -@var{pattern_type} accepts one of the following values. -@table @option -@item sequence -Select a sequence pattern type, used to specify a sequence of files -indexed by sequential numbers. - -A sequence pattern may contain the string "%d" or "%0@var{N}d", which -specifies the position of the characters representing a sequential -number in each filename matched by the pattern. If the form -"%d0@var{N}d" is used, the string representing the number in each -filename is 0-padded and @var{N} is the total number of 0-padded -digits representing the number. The literal character '%' can be -specified in the pattern with the string "%%". - -If the sequence pattern contains "%d" or "%0@var{N}d", the first filename of -the file list specified by the pattern must contain a number -inclusively contained between @var{start_number} and -@var{start_number}+@var{start_number_range}-1, and all the following -numbers must be sequential. - -For example the pattern "img-%03d.bmp" will match a sequence of -filenames of the form @file{img-001.bmp}, @file{img-002.bmp}, ..., -@file{img-010.bmp}, etc.; the pattern "i%%m%%g-%d.jpg" will match a -sequence of filenames of the form @file{i%m%g-1.jpg}, -@file{i%m%g-2.jpg}, ..., @file{i%m%g-10.jpg}, etc. - -Note that the pattern must not necessarily contain "%d" or -"%0@var{N}d", for example to convert a single image file -@file{img.jpeg} you can employ the command: -@example -ffmpeg -i img.jpeg img.png -@end example - -@item glob -Select a glob wildcard pattern type. - -The pattern is interpreted like a @code{glob()} pattern. This is only -selectable if libavformat was compiled with globbing support. - -@item glob_sequence @emph{(deprecated, will be removed)} -Select a mixed glob wildcard/sequence pattern. - -If your version of libavformat was compiled with globbing support, and -the provided pattern contains at least one glob meta character among -@code{%*?[]@{@}} that is preceded by an unescaped "%", the pattern is -interpreted like a @code{glob()} pattern, otherwise it is interpreted -like a sequence pattern. - -All glob special characters @code{%*?[]@{@}} must be prefixed -with "%". To escape a literal "%" you shall use "%%". - -For example the pattern @code{foo-%*.jpeg} will match all the -filenames prefixed by "foo-" and terminating with ".jpeg", and -@code{foo-%?%?%?.jpeg} will match all the filenames prefixed with -"foo-", followed by a sequence of three characters, and terminating -with ".jpeg". - -This pattern type is deprecated in favor of @var{glob} and -@var{sequence}. -@end table - -Default value is @var{glob_sequence}. -@item pixel_format -Set the pixel format of the images to read. If not specified the pixel -format is guessed from the first image file in the sequence. -@item start_number -Set the index of the file matched by the image file pattern to start -to read from. Default value is 0. -@item start_number_range -Set the index interval range to check when looking for the first image -file in the sequence, starting from @var{start_number}. Default value -is 5. -@item video_size -Set the video size of the images to read. If not specified the video -size is guessed from the first image file in the sequence. -@end table - -@subsection Examples - -@itemize -@item -Use @command{ffmpeg} for creating a video from the images in the file -sequence @file{img-001.jpeg}, @file{img-002.jpeg}, ..., assuming an -input frame rate of 10 frames per second: -@example -ffmpeg -i 'img-%03d.jpeg' -r 10 out.mkv -@end example - -@item -As above, but start by reading from a file with index 100 in the sequence: -@example -ffmpeg -start_number 100 -i 'img-%03d.jpeg' -r 10 out.mkv -@end example - -@item -Read images matching the "*.png" glob pattern , that is all the files -terminating with the ".png" suffix: -@example -ffmpeg -pattern_type glob -i "*.png" -r 10 out.mkv -@end example -@end itemize - -@section rawvideo - -Raw video demuxer. - -This demuxer allows to read raw video data. Since there is no header -specifying the assumed video parameters, the user must specify them -in order to be able to decode the data correctly. - -This demuxer accepts the following options: -@table @option - -@item framerate -Set input video frame rate. Default value is 25. - -@item pixel_format -Set the input video pixel format. Default value is @code{yuv420p}. - -@item video_size -Set the input video size. This value must be specified explicitly. -@end table - -For example to read a rawvideo file @file{input.raw} with -@command{ffplay}, assuming a pixel format of @code{rgb24}, a video -size of @code{320x240}, and a frame rate of 10 images per second, use -the command: -@example -ffplay -f rawvideo -pixel_format rgb24 -video_size 320x240 -framerate 10 input.raw -@end example - -@section sbg - -SBaGen script demuxer. - -This demuxer reads the script language used by SBaGen -@url{http://uazu.net/sbagen/} to generate binaural beats sessions. A SBG -script looks like that: -@example --SE -a: 300-2.5/3 440+4.5/0 -b: 300-2.5/0 440+4.5/3 -off: - -NOW == a -+0:07:00 == b -+0:14:00 == a -+0:21:00 == b -+0:30:00 off -@end example - -A SBG script can mix absolute and relative timestamps. If the script uses -either only absolute timestamps (including the script start time) or only -relative ones, then its layout is fixed, and the conversion is -straightforward. On the other hand, if the script mixes both kind of -timestamps, then the @var{NOW} reference for relative timestamps will be -taken from the current time of day at the time the script is read, and the -script layout will be frozen according to that reference. That means that if -the script is directly played, the actual times will match the absolute -timestamps up to the sound controller's clock accuracy, but if the user -somehow pauses the playback or seeks, all times will be shifted accordingly. - -@section tedcaptions - -JSON captions used for @url{http://www.ted.com/, TED Talks}. - -TED does not provide links to the captions, but they can be guessed from the -page. The file @file{tools/bookmarklets.html} from the FFmpeg source tree -contains a bookmarklet to expose them. - -This demuxer accepts the following option: -@table @option -@item start_time -Set the start time of the TED talk, in milliseconds. The default is 15000 -(15s). It is used to sync the captions with the downloadable videos, because -they include a 15s intro. -@end table - -Example: convert the captions to a format most players understand: -@example -ffmpeg -i http://www.ted.com/talks/subtitles/id/1/lang/en talk1-en.srt -@end example - -@c man end DEMUXERS |