ffmpeg2theora

FFMPEG2THEORA(1)            General Commands Manual           FFMPEG2THEORA(1)



NAME
       ffmpeg2theora - command-line converter to create Ogg Theora and Ogg
       Vorbis files.

SYNOPSIS
       ffmpeg2theora [options] inputfile

DESCRIPTION
       This manual page documents briefly the ffmpeg2theora command.

       ffmpeg2theora is a program that converts any media file that ffmpeg can
       decode to Ogg Theora for video and Ogg Vorbis for audio.

OPTIONS
       To read from standard input, specify `-' as the input filename.

       These programs follow the usual GNU command line syntax, with long
       options starting with two dashes (`-').  A summary of options is
       included below.

   General output options:
       -o, --output
              Specify the output filename.  If no output filename is
              specified, output will be written to inputfile.ogv.  To output
              to standard output, specify /dev/stdout as the output file.

       --no-skeleton
              Disables Ogg Skeleton metadata output.

       --seek-index
              Enables keyframe index in skeleton track.

       -s, --starttime
              Start encoding at this time (in seconds).

       -e, --endtime
              End encoding at this time (in seconds).

       -p, --preset
              Encode file with v2v preset.  Right now, there is preview, pro
              and videobin.  Run “ffmpeg2theora -p info” for more information.

   Video output options:
       -v, --videoquality
              [0 to 10] Set encoding quality for video (default: 6).
                        use higher values for better quality

       -V, --videobitrate
              Set encoding bitrate for video (in kb/s).

       --soft-target
              Use a large reservoir and treat the rate as a soft target; rate
              control is less strict but resulting quality is usually
              higher/smoother overall. Soft target also allows an optional -v
              setting to specify a minimum allowed quality.

       --two-pass
              Compress input using two-pass rate control.  This option
              requires that the input to the to the encoder is seekable and
              performs both passes automatically.

       --first-pass <filename>
              Perform first-pass of a two-pass rate controlled encoding,
              saving pass data to <filename> for a later second pass

       --second-pass <filename>
              Perform second-pass of a two-pass rate controlled encoding,
              reading first-pass data from <filename>.  The first pass data
              must come from a first encoding pass using identical input video
              to work properly.


       --optimize
              Optimize output Theora video, using a full search for motion
              vectors instead of a hierarchical one. This can reduce video
              bitrate about 5%, but it is slower and therefore is disabled by
              default.

       --speedlevel
              encoding is faster with higher values the cost is quality and
              bandwidth (default 1) available values depend on the version of
              libtheora check ffmpeg2theora --help for supported values.

       -x, --width
              Scale to given width (in pixels).

       -y, --height
              Scale to given height (in pixels).

       --aspect
              Define frame aspect ratio (e.g. 4:3, 16:9).

       --pixel-aspect
              Define pixel aspect ratio (e.g. 1:1, 4:3).

       -F, --framerate
              output framerate e.g 25:2 or 16

       --croptop, --cropbottom, --cropleft, --cropright
              Crop input by given pixels before resizing.

       -K, --keyint
              [8 to 2147483647] Set keyframe interval (default: 64).

       -d, --buf-delay
              Buffer delay (in frames). Longer delays allow smoother rate
              adaptation and provide better overall quality, but require more
              client side buffering and add latency. The default value is the
              keyframe interval for one-pass encoding (or somewhat larger if
              --soft-target is used) and infinite for two-pass encoding. (only
              works in bitrate mode)

       --no-upscaling
              only scale video or resample audio if input is bigger than
              provided parameter

   Video transfer options:
       --pp   Video Postprocessing, denoise, deblock, deinterlacer use --pp
              help for a list of available filters.

       -C, --contrast
              [0.1 to 10.0] contrast correction (default: 1.0). Note: lower
              values make the video darker.

       -B, --brightness
              [-1.0 to 1.0] brightness correction (default: 0.0). Note: lower
              values make the video darker.

       -G, --gamma
              [0.1 to 10.0] gamma correction (default: 1.0). Note: lower
              values make the video darker.

       -P, --saturation
              [0.1 to 10.0] saturation correction (default: 1.0). Note: lower
              values make the video grey.

   Audio output options:
       -a, --audioquality
              [-2 to 10] Set encoding quality for audio (default: 1).
                         use higher values for better quality

       -A, --audiobitrate
              [32 to 500] Set encoding bitrate for audio (in kb/s).

       -c, --channels
              Set number of output channels.

       -H, --samplerate
              Set output samplerate (in Hz).

   Input options:
       --noaudio
              Disable audio from input.

       --novideo
              Disable video from input.

       --deinterlace
              Force deinterlace.  Otherwise only material marked as interlaced
              will be deinterlaced.

       --no-deinterlace
              Force deinterlace off.

       --vhook
              you can use ffmpeg's vhook system, example:
               ffmpeg2theora --vhook '/path/watermark.so -f wm.gif' input.dv

       -f, --format
              Specify input format.

       --inputfps
              Override input fps.

       --audiostream id
              By default the first audio stream is selected, use this to
              select another audio stream.

       --videostream id
              By default the first video stream is selected, use this to
              select another audio stream.

       --sync Use A/V sync from input container. Since this does not work with
              all input format you have to manualy enable it if you have
              issues with A/V sync.

   Subtitles options:
       --subtitles
              Encode subtitles from the given file to a multiplexed Kate
              stream.  The input file should be in SubRip (.srt) format,
              encoded in UTF-8, unless the --subtitles-encoding option is also
              given.

       --subtitles-encoding encoding
              Assumes the corresponding subtitles file is encoded in the given
              encoding. If ffmpeg2theora was built with iconv support, all
              encodings supported by iconv may be used. Otherwise, UTF-8 and
              ISO-8859-1 (aka latin1) are supported. The default is UTF-8.

       --subtitles-language language
              Sets the language of the corresponding subtitles stream. This
              will be set in the corresponding Kate stream so a video player
              may make this available to the user for language selection.
              Language is an ISO 639-1 or RFC 3066 ASCII string and is limited
              to 15 characters.

       --subtitles-category category
              Sets the category of the corresponding subtitles stream. This
              will be set in the corresponding Kate stream so a video player
              may make this available to the user for selection. The default
              category is "subtitles". Suggested other categories may include
              "transcript", "commentary", "lyrics", etc. Category is an ASCII
              string and is limited to 15 characters

       --subtitles-ignore-non-utf8
              When reading an UTF-8 subtitles text file, any invalid UTF-8
              sequence will be ignored. This may be useful if there are stray
              sequences in an otherwise UTF-8 file. Note that, since those
              invalid sequences will be removed from the output, this option
              is not a substitute to converting a non UTF-8 file to UTF-8.

       --nosubtitles
              Disables subtitles from input.  Note that subtitles explicitely
              loaded from external files will still be used.

       --subtitle-types
              Selects which subtitle types to include from the input file.
              Allowed types are: none, all, text, spu (spu being the image
              based subtitles found on DVD).  By default, only text based
              subtitles will be included.  Note that subtitles explicitely
              loaded from external files will still be used.

   Metadata options:
       --artist
              Name of artist (director).

       --title
              Title.

       --date Date.

       --location
              Location.

       --organization
              Name of organization (studio).

       --copyright
              Copyright.

       --license
              License.

       --contact
              Contact link.

       --nometadata
              disables metadata from input

       --no-oshash
              do not include oshash of source file(SOURCE_OSHASH)


   Keyframe indexing options:
       --index-interval <n>
              set minimum distance between indexed keyframes to <n> ms
              (default: 2000)

       --theora-index-reserve <n>
              reserve <n> bytes for theora keyframe index

       --vorbis-index-reserve <n>
              reserve <n> bytes for vorbis keyframe index

       --kate-index-reserve <n>
              reserve <n> bytes for kate keyframe index


   Other options:
       --nice n
              Set niceness to n.

       -h, --help
              Output a help message.

       --info Output json info about input file, use -o to save json to file.

       --frontend
              print status information in json, one json dict per line

EXAMPLES
       Encode Videos:
         ffmpeg2theora videoclip.avi (will write output to videoclip.ogv)

         cat something.dv | ffmpeg2theora -f dv -o output.ogv -

       Encode a series of images:
         ffmpeg2theora frame%06d.png -o output.ogv

       Live streaming from V4L Device:
         ffmpeg2theora --no-skeleton /dev/video0 -f video4linux \
                       --inputfps 15 -x 160 -y 128 \
                       -o - | oggfwd icast2server 8000 password /theora.ogv

         (you might have to use video4linux2 depending on your hardware)

       Live encoding from a DV camcorder (needs a fast machine):
         dvgrab - | ffmpeg2theora -f dv -x 352 -y 288 -o output.ogv -0

       Live encoding and streaming to icecast server:
         dvgrab --format raw - \
         | ffmpeg2theora --no-skeleton -f dv -x 160 -y 128 -o /dev/stdout - \
         | oggfwd icast2server 8000 password /theora.ogv



AUTHOR
       ffmpeg2theora was written by jan gerber <j@v2v.cc>.

       This manual page was written by Hubert Chan <hubert@uhoreg.ca>, for the
       Debian project (but may be used by others).



                                 May 14, 2010                 FFMPEG2THEORA(1)