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