This adds a circular buffer to ffmpeg-mux when writing to a file.
Output from ffmpeg is buffered so that slow disk I/O does not block
ffmpeg writes, as this causes the pipe to become full and OBS stops
sending frames with a misleading "Encoding overloaded!" warning. The
buffer may grow to 256 MB depending on the rate of data coming in and
out, if the buffer is full OBS will start waiting in ffmpeg writes.
A separate I/O thread is responsible for processing the contents of
the buffer and writing them to the output file. It tries to process 1 MB
at a time to minimize small I/O.
Complicating things considerably, some formats in ffmpeg require seeking
on the output, so we can't just treat everything as a stream of bytes.
To handle this, we record offsets of each write and try to buffer as
many contiguous writes as possible. This unfortunately makes the code
quite complicated, but hopefully well commented.
The original PR missed assigning the `idx` variable in unregister. When
compiled without asserts this would silently not delete sources. Instead
correctly assign idx and skip unregistration if the source doesnt appear
registered.
fixes#6532
Some webcams, or other AVCaptureDevices like connected iOS devices which
are supported since 162450c, have an audio output which so far got
ignored.
Now, if supported, the audio will be captured alongside the video. For
existing sources, the properties have a button enabling this; while new
sources have it enabled by default.
When running on EGL we can use the new create_texture_from_pixmap
functions to implement xcomposite capture.
This removes the texture indirection previously implemented for GLX due
to not using the spriting functionality in the built in shaders. Now
that we texture directly from the pixmap we can remove the red/blue swap
workarounds.
Generally moves all the plugin code into xcomposite-input.cpp and
removes all C++ dependencies.
Migrate as much as possible to xcb from Xlib to enable us to handle
errors and attribute them to the correct callers. This caused many other
knock on issues such as wrongly attributed errors and cleanup code
working incorrectly.
That allows us to use the xcursor-xcb implementation and delete the pure
Xlib implementation. We also add the missing functionality from the Xlib
implementation to the xcb implementation.
Capture glXCreatePixmap errors which occur most commonly on
nvidia+gnome due to nvidia's driver being unable to allocate more than 1
pixmap per window and gnome being the only compositor to read window
data via glx pixmaps.
Fix cleanup after failed glXCreatePixmap that might have leaked pixmaps
and prevented later captures on nvidia drivers for the same reason.
Replaces the current implementation of Window Capture, which uses Core
Graphics to render a bitmap raster, with one that accesses the window's
CGImage bitmap directly, blits it, and hands that off as a frame to OBS
instead.
Co-Authored-By: Sebastian Beckmann <beckmann.sebastian@outlook.de>
This fixes issue https://github.com/obsproject/obs-studio/issues/6295 .
libvlc does some downmixing/upmixing when the number of channels
requested is less than the number of channels of the source.
We take advantage of that feature to avoid doing it with swresample
because we're missing info that libvlc is not giving (the exact channel
layout of the source).
Signed-off-by: pkv <pkv@obsproject.com>
evandroduarte