Una nueva actualización del codificador x264 VFW, codec de vídeo gratuito que permite comprimir un vídeo en formato H.264 (MPEG-4 AVC) en programas con soporte "Video for Windows" como por ejemplo VirtualDub u otros que lo empleen, esta versión va a la par de actualizada con la versión x264 CLI.
Split each lookahead frame analysis call into multiple threads. Has a small
impact on quality, but does not seem to be consistently any worse.
This helps alleviate bottlenecks with many cores and frame threads. In many
case, this massively increases performance on many-core systems. For example,
over 100% faster 1080p encoding with --preset veryfast on a 12-core i7 system.
Realtime 1080p30 at --preset slow should now be feasible on real systems.
For sliced-threads, this patch should be faster regardless of settings (~10%).
By default, lookahead threads are 1/6 of regular threads. This isn't exacting,
but it seems to work well for all presets on real systems. With sliced-threads,
it's the same as the number of encoding threads.
Add support for RGB formats in bit-depth conversion filter
Fix some bugs in mb_info code
Add mb_info API for signalling constant macroblocks
Some use-cases of x264 involve encoding video with large constant areas of the frame.
Sometimes, the caller knows which areas these are, and can tell x264.
This API lets the caller do this and adds internal tracking of modifications to macroblocks to avoid problems.
This is really only suitable without B-frames.
An example use-case would be using x264 for VNC.
Faster chroma weight cost calculation
New assembly function with SSE2, SSSE3 and XOP implementations for calculating absolute sum of differences.
Add Level 5.2 support
Eradicate all mention of Extended Profile
x264 never supported it and never will because nobody uses it.
Fix disabling of mbtree when using 2pass encoding and zones
configure: force select -mXX gcc option for i386/x86-64
Makes multilib compilation more convenient.
Update config.guess and config.sub
Adds support for a bunch of targets, including:
configure: correct use of RC variable and add --extra-rcflags
ICL/MSVS: Fix shared library generation and usage
MSVS requires exported variables to be declared with the DATA keyword, and requires that imported variables be declared with dllimport.
This does not fix x264 cli being unable to use a shared library built by ICL however.
Fix intra-refresh + hrd
Fix frame input colorspace check
Fix comment in deblock.c
The code does, in fact, handle CAVLC+8x8dct correctly already.
Fix sliced-threads ratecontrol bug
Was using qp instead of qscale; could cause NANs (not to mention less accurate results).