mirror of https://github.com/mpv-player/mpv
156 lines
5.3 KiB
ReStructuredText
156 lines
5.3 KiB
ReStructuredText
General usage
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=============
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::
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mpv infile -o outfile [-of outfileformat] [-ofopts formatoptions] [-orawts] \
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[(any other mpv options)] \
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-ovc outvideocodec [-ovcopts outvideocodecoptions] \
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-oac outaudiocodec [-oacopts outaudiocodecoptions]
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Help for these options is provided if giving help as parameter, as in::
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mpv -ovc help
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The suboptions of these generally are identical to ffmpeg's (as option parsing
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is simply delegated to ffmpeg). The option -ocopyts enables copying timestamps
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from the source as-is, instead of fixing them to match audio playback time
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(note: this doesn't work with all output container formats); -orawts even turns
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off discontinuity fixing.
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Note that if neither -ofps nor -oautofps is specified, VFR encoding is assumed
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and the time base is 24000fps. -oautofps sets -ofps to a guessed fps number
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from the input video. Note that not all codecs and not all formats support VFR
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encoding, and some which do have bugs when a target bitrate is specified - use
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-ofps or -oautofps to force CFR encoding in these cases.
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Of course, the options can be stored in a profile, like this .config/mpv/mpv.conf
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section::
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[myencprofile]
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vf-add = scale=480:-2
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ovc = libx264
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ovcopts-add = preset=medium
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ovcopts-add = tune=fastdecode
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ovcopts-add = crf=23
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ovcopts-add = maxrate=1500k
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ovcopts-add = bufsize=1000k
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ovcopts-add = rc_init_occupancy=900k
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ovcopts-add = refs=2
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ovcopts-add = profile=baseline
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oac = aac
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oacopts-add = b=96k
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It's also possible to define default encoding options by putting them into
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the section named ``[encoding]``. (This behavior changed after mpv 0.3.x. In
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mpv 0.3.x, config options in the default section / no section were applied
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to encoding. This is not the case anymore.)
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One can then encode using this profile using the command::
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mpv infile -o outfile.mp4 -profile myencprofile
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Some example profiles are provided in a file
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etc/encoding-profiles.conf; as for this, see below.
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Encoding examples
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=================
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These are some examples of encoding targets this code has been used and tested
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for.
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Typical MPEG-4 Part 2 ("ASP", "DivX") encoding, AVI container::
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mpv infile -o outfile.avi \
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--vf=fps=25 \
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-ovc mpeg4 -ovcopts qscale=4 \
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-oac libmp3lame -oacopts ab=128k
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Note: AVI does not support variable frame rate, so the fps filter must be used.
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The frame rate should ideally match the input (25 for PAL, 24000/1001 or
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30000/1001 for NTSC)
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Typical MPEG-4 Part 10 ("AVC", "H.264") encoding, Matroska (MKV) container::
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mpv infile -o outfile.mkv \
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-ovc libx264 -ovcopts preset=medium,crf=23,profile=baseline \
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-oac libvorbis -oacopts qscale=3
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Typical MPEG-4 Part 10 ("AVC", "H.264") encoding, MPEG-4 (MP4) container::
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mpv infile -o outfile.mp4 \
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-ovc libx264 -ovcopts preset=medium,crf=23,profile=baseline \
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-oac aac -oacopts ab=128k
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Typical VP8 encoding, WebM (restricted Matroska) container::
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mpv infile -o outfile.mkv \
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-of webm \
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-ovc libvpx -ovcopts qmin=6,b=1000000k \
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-oac libvorbis -oacopts qscale=3
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Device targets
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==============
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As the options for various devices can get complex, profiles can be used.
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An example profile file for encoding is provided in
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etc/encoding-profiles.conf in the source tree. This file is installed and loaded
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by default. If you want to modify it, you can replace and it with your own copy
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by doing::
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mkdir -p ~/.mpv
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cp /etc/mpv/encoding-profiles.conf ~/.mpv/encoding-profiles.conf
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Keep in mind that the default profile is the playback one. If you want to add
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options that apply only in encoding mode, put them into a ``[encoding]``
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section.
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Refer to the top of that file for more comments - in a nutshell, the following
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options are added by it::
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-profile enc-to-dvdpal DVD-Video PAL, use dvdauthor -v pal+4:3 -a ac3+en
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-profile enc-to-dvdntsc DVD-Video NTSC, use dvdauthor -v ntsc+4:3 -a ac3+en
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-profile enc-to-bb-9000 MP4 for Blackberry Bold 9000
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-profile enc-to-nok-6300 3GP for Nokia 6300
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-profile enc-to-psp MP4 for PlayStation Portable
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-profile enc-to-iphone MP4 for iPhone
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-profile enc-to-iphone-4 MP4 for iPhone 4 (double res)
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-profile enc-to-iphone-5 MP4 for iPhone 5 (even larger res)
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You can encode using these with a command line like::
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mpv infile -o outfile.mp4 -profile enc-to-bb-9000
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Of course, you are free to override options set by these profiles by specifying
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them after the -profile option.
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What works
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==========
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* Encoding at variable frame rate (default)
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* Encoding at constant frame rate using --vf=fps=RATE
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* 2-pass encoding (specify flags=+pass1 in the first pass's -ovcopts, specify
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flags=+pass2 in the second pass)
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* Hardcoding subtitles using vobsub, ass or srt subtitle rendering (just
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configure mpv for the subtitles as usual)
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* Hardcoding any other mpv OSD (e.g. time codes, using -osdlevel 3 and -vf
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expand=::::1)
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* Encoding directly from a DVD, network stream, webcam, or any other source
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mpv supports
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* Using x264 presets/tunings/profiles (by using profile=, tune=, preset= in the
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-ovcopts)
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* Deinterlacing/Inverse Telecine with any of mpv's filters for that
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* Audio file converting: mpv -o outfile.mp3 infile.flac -no-video -oac
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libmp3lame -oacopts ab=320k
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What does not work yet
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======================
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* 3-pass encoding (ensuring constant total size and bitrate constraints while
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having VBR audio; mencoder calls this "frameno")
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* Direct stream copy
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