Corpus VBR mode is a variant of standard VBR where the complexity
distribution midpoint is passed in rather than calculated for a specific
clip or chunk.
The valid range is [0, 10000]. 0 (default) uses standard VBR.
Signed-off-by: James Zern <jzern@google.com>
Supports only raw NV12 input.
Example use:
./vaapi_encode 1920 1080 test.yuv test.h264
Signed-off-by: Jun Zhao <jun.zhao@intel.com>
Signed-off-by: Liu, Kaixuan <kaixuan.liu@intel.com>
Signed-off-by: Mark Thompson <sw@jkqxz.net>
The present value name for maximum thickness is 'max' which results in a
parse error of any thickness expression containing 'max(val1,val2)'.
Value renamed to 'fill'. Tested locally and documented.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This was added in early 2013 and abandoned several months later; as far as
I can tell, there are no external users. Future OpenCL use will be via
hwcontext, which requires neither special OpenCL-only API nor global state
in libavutil.
All internal users are also deleted - this is just the unsharp filter
(replaced by unsharp_opencl, which is more flexible) and the deshake filter
(no replacement).
Add two FAQs about running FFmpeg in the background.
The first explains the use of the -nostdin option in
a straightforward way. Text revised based on review.
The second FAQ starts from a confusing error message,
and leads to the solution, use of the -nostdin option.
The purpose of the second FAQ is to attract web searches
from people having the problem, and offer them a solution.
Add an anchor to the Main Options section of the ffmpeg
documentation, so that the FAQs can link directly there.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
For some strange reason "-t" option was only implemented
for input files while both "-t" and "-to" were available
for use for output files. This made extracting a range from
input file inconvenient.
This patch enables -to option for input so one can do
ffmpeg -ss 1:23:20 -to 1:27:22.3 -i myinput.mkv ...
Signed-off-by: Vitaly _Vi Shukela <vi0oss@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This can reduce latency and increase throughput, particularly on high
latency networks.
Signed-off-by: Aman Gupta <aman@tmm1.net>
Reviewed-by: Jeyapal, Karthick <kjeyapal@akamai.com>
The user-supplied value for timecode_rate in drawtext is rounded
to nearest integer. So, a supplied value of 0.49 or lower is rounded to 0.
This throws a misleading error message which says "Timecode frame rate must be
specified". Changed message to account for values under one.
Also noted supported framerates for drop TC.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
suppress the "warning: assignment discards ‘const’ qualifier from
pointer target type" build warning.
Signed-off-by: Jun Zhao <jun.zhao@intel.com>
Reviewed-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
suppress the "warning: assignment discards ‘const’ qualifier from
pointer target type" build warning.
Signed-off-by: Jun Zhao <jun.zhao@intel.com>
Reviewed-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
suppress the "warning: assignment discards ‘const’ qualifier from
pointer target type" build warning.
Signed-off-by: Jun Zhao <jun.zhao@intel.com>
Reviewed-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This patch enables paletteuse to identify the transparency in incoming
video and tag transparent pixels on outgoing video with the correct
index from the palette.
This requires tracking the transparency index in the palette,
establishing an alpha threshold below which a pixel is considered
transparent and above which the pixel is considered opaque, and
additional changes to track the alpha value throughout the conversion
process.
This change is a partial fix for https://trac.ffmpeg.org/ticket/4443
However, animated GIFs are still output incorrectly due to a bug
in gif optimization which does not correctly handle transparency.
Signed-off-by: Clément Bœsch <u@pkh.me>
Jeyapal, Karthick
James Zern
Jun Zhao
Gyan Doshi
Vittorio Giovara
Mark Thompson
Paul B Mahol
Richard Ling
Lou Logan
Werner Robitza
Jim DeLaHunt
Vishwanath Dixit
Carl Eugen Hoyos
Vitaly _Vi Shukela
Aman Gupta
Steven Liu
James Almer
Aurelien Jacobs
Ashish Pratap Singh
Nicolas George
Bjorn Roche