Allows stepping back one frame via the frame_back_step inout command,
bound to "," by default.
This uses the precise seeking facility, and a perfect frame index built
on the fly. The index is built during playback and precise seeking, and
contains (as of this commit) the last 100 displayed or skipped frames.
This index is used to find the PTS of the previous frame, which is then
used as target for a precise seek. If no PTS is found, the core attempts
to do a seek before the current frame, and skip decoded frames until the
current frame is reached; this will create a sufficient index and the
normal backstep algorithm can be applied.
This can be rather slow. The worst case for backstepping is about the
same as the worst case for precise seeking if the previous frame can be
deduced from the index. If not, the worst case will be twice as slow.
There's also some minor danger that the index is incorrect in case
framedropping is involved. For framedropping due to --framedrop, this
problem is ignored (use of --framedrop is discouraged anyway). For
framedropping during precise seeking (done to make it faster), we try
to not add frames to the index that are produced when this can happen.
I'm not sure how well that works (or if the logic is sane), and it's
sure to break with some video filters. In the worst case, backstepping
might silently skip frames if you backstep after a user-initiated
precise seek. (Precise seeks to do indexing are not affected.)
Likewise, video filters that somehow change timing of frames and do not
do this in a deterministic way (i.e. if you seek to a position, frames
with different timings are produced than when the position is reached
during normal playback) will make backstepping silently jump to the
wrong frame. Enabling/disabling filters during playback (like for
example deinterlacing) will have similar bad effects.
It's not sure if there's anything that could trigger this accidentally.
Normally this can't happen, because hrseek ends always if the PTS is
large enough, the same condition which disables framedrop. Seeking
resets hrseek framedrop anyway.
On the other hand, this change makes the code easier to understand,
and might be more robust against weird corner cases.
Block X11's native key repeat, and use mpv's key repeat handling in
input.c instead.
No configure check for XKB. Even though it's an extension, it has been
part of most (all?) xlibs since 1996. If XKB appears to be missing,
just refuse enabling x11.
This is a potentially controversial change. mpv will use its own key
repeat rate, instead of X11's. This should be better, because seeking
will have a standardized "speed" (seek events per seconds when keeping
a seek key held down). It will also allow disabling key repears for
certain commands, though this is not done anywhere yet.
The new behavior can be disabled with the --native-keyrepeat option.
Key repeats were skipped when playloop iterations took too long. Fix
this by using the total times for key repeat calculation, instead of the
time difference to the last key repeat event.
Key bindings can include mutiple keys at once (additional to key
modifiers like ctrl etc.). This becomes annoying when quickly switching
between two bound keys, e.g. when seeking back and forth, you might end
up hitting the "left" and "right" keys at once. The user doesn't expect
to invoke the key binding "left-right", but would prefer a key stroke to
invoke the binding it was supposed to invoke.
So if there's no binding for a multi-key combination, try to find a
binding for the key last held down. This preserves the ability to define
multi-key combinations, while the common case works as expected.
VOs can use the MP_KEY_STATE_DOWN modifier to pass key up/down events to
input.c, instead of just simple key presses. This allows doing key auto-
repeat handling in input.c, if the VO doesn't want to do that.
One issue is that so far, this code has been used only for mouse events,
even though the code was originally written with keyboard keys in mind.
One difference between mouse keys and keyboard keys is that the initial
key down should not generate an input command with mouse buttons
(input.c did that), while keyboard events should (input.c didn't do
that). Likewise, releasing a key should generate input commands for
mouse buttons releases, but not for the keyboard.
Change the code so mouse buttons (recognized via the MP_NO_REPEAT_KEY
flag) follow the old hehavior, while other keys generate input commands
on key down, but not on key release.
Note that a key release event is posted either using
MP_INPUT_RELEASE_ALL, or a normal key press event after having sent a an
event with MP_KEY_STATE_DOWN. This is probably a bit confusing, and a
MP_KEY_STATE_RELEASE should be added.
Fix shift-handling with MP_KEY_STATE_DOWN as well.
This check was always false:
if (num == EBML_UINT_INVALID)
Fix it by using the proper type for the num variable.
This case actually doesn't really matter, and this is just for hiding
the warning and for being 100% correct.
Empty sub-option parameters mean the sub-option should be skipped,
e.g. -vf gradfun=:10 sets the second option (by position) to 10. This
was broken in commit 04f1e2d.
The VO warns by default that the nomanyfmts option should be used if
video display fails. This is almost completely useless, but people
keep asking what it means.
Background: slice support has been completely removed, because it
doesn't work with multithreading, and provides a rather bad complexity
to performance tradeoff otherwise.
Used to be disabled by default, because libavdevice depends on
libavfilter, and earlier versions of libavfilter exports symbols that
clash with mpv's due to its MPlayer filter wrapper. Our configure script
explicitly detects these symbols now, and we can use that to safely
auto-detect libavdevice too. If we detect that libavfilter can't be
safely used, libavdevice is disabled as well.
This allows things like:
'--vf=lavfi="gradfun=20:30"'
Adjust the documentation for vf_lavfi to make the example less verbose.
As an unrelated change, add a general description to vf_lavfi.
Requires recent FFmpeg/Libav git versions. Earlier versions will not
be supported, as the API is different. (A libavfilter version that
uses AVFrame instead of AVFilterBuffer is needed.)
Note that this is sort of useless, because the option parser prevents
you from making use of the full libavfilter graph syntax. This has to be
fixed later.
Most of the filter creation code (half of the config() function) has
been taken from avplay.c.
This code is not based on MPlayer's vf_lavfi. The MPlayer code doesn't
compile as it hasn't been updated through multiple libavfilter API
changes, making it completely useless as a starting point.
Parsing sub-configs (like --rawvideo=subopts or the suboptions for
--vo=opengl:subopts) was completely different from the -vf parsing code
for a variety of reasons. This change at least makes -vf use the same
splitter code as sub-config options.
The main improvement is that -vf now accepts quotes, so you can write
things like:
-vf 'lavfi=graph="gradfun=10:20"'
(The '' quotes are for shell escaping.)
This is a rather big and intrusive change. Trying some -vf lines from
etc/encoding-example-profiles.conf seems to confirm it still works.
This also attempts to unify one subtle difference in handling of
positional arguments. One consequence is that a minor detail changes.
Sub-configs don't know positional arguments, and something like "--
opt=sub1=val1:sub2" means that sub2 has to be a flag option. In -vf
parsing, sub2 would be a positional option value. To remove this
conflict and to facilitate actual unification of the parsers in the
future, the sub2 will be considered a flag option if and only if such a
flag option exists. Otherwise, it's considered a value for a positional
option.
E.g. if there's a filter "foo" with a string option "sopt" and a flag
option "fopt", the behavior of the following changes:
-vf foo=fopt
Before this commit, this would set "sopt=fopt" in the filter. Now, it
enables the fopt flag, and the sopt option remains unset. This is not an
actual problem to my knowledge.
Remove the "object settings" based track range parsing (needed by
stream_cdda only), and make stream_cdda use CONF_TYPE_INT_PAIR.
This makes the -vf parsing code completely independent from other
options. A bit of that code was used by the mechanism removed with
this commit.
When trying to seek before the start of the file, which usually happens
when using the arrow keys to seek to the start of the file, external
libavformat demuxed subtitles will be invisible. This is because seeking
in the external subtitle file fails, so the subtitle demuxer is left in
a random state.
This is actually similar to the normal seeking path, which has some
fallback code to handle this situation. Add such code to the subtitle
seeking path too.
(Normally, all demuxer support av_seek_frame(), except subtitles, which
support avformat_seek_file() only. The latter was meant to be the "new"
seeking API, but this never really took off, and using it normally seems
to cause worse seeking behavior. Or maybe we just use it incorrectly,
nobody really knows.)
Before this commit, it was more or less random which subtitle was
preferred if there was both an auto-loaded external subtitle, and a
subtitle loaded via -sub or -subfile. -sub subtitles happened to be
preferred over auto-loaded subs, while -subfile didn't. Fix the -subfile
case, and make the behavior consistent by making the selection behavior
explicit.
Get rid of the 1-char subtitle type field. Use sh_stream->codec instead
just like audio and video do. Use codec names as defined by libavcodec
for simplicity, even if they're somewhat verbose and annoying.
Note that ffmpeg might switch to "ass" as codec name for ASS, so we
don't bother with the current silly "ssa" name.
MP_INPUT_BUFFER_PADDING_SIZE and FF_INPUT_BUFFER_PADDING_SIZE are both
16. The doxygen for FF_INPUT_BUFFER_PADDING_SIZE says only the first 23
bits must to be 0, but this is probably a lie.
This removes the stream handling mess by using a single list for all
stream types.
One consequence is that new streams are always set to AVDISCARD_ALL,
which could be an issue if packets are read before initializing other
streams. However, this doesn't seem to an issue for various reasons,
so we don't do anything about it.
The new code strictly assumes that libavformat never removes or
reorders streams once added to AVFormatContext->streams. Undefined
behavior will result if it does.
mkv_track_t now references sh_stream directly, instead of using an ID.
Also remove all accesses to demux_stream (demuxer->video etc.).
Remove some slave-mode things on the way, like "ID_SID_..." messages.
Some preparations to simplify demux_mkv and demux_lavf.
struct demux_stream manages state for each stream type that is being
demuxed (audio/video/sub). demux_stream is rather annoying, especially
the id and sh members, which are often used by the demuxers to determine
current stream and so on. Demuxers don't really have to access this,
except for testing whether a stream is selected and to add packets.
Add a new_sh_stream(), which allows creating streams without having the
caller specify any kind of stream ID. Demuxers should just use sh_stream
pointers, instead of multiple kinds of IDs and indexes.
Since demux_mkv queries the demuxer state when reading packets, track
switching is completely passive. Cycling etc. is done by the frontend.
As result, all track switching code can be removed.
wm4
eng