- normalize score to [0..100] instead of [0..85]
- change the default score to 8.2 to roughly keep existing behaviour
- take into account bit depth
- do not truncate to integer
Signed-off-by: Marton Balint <cus@passwd.hu>
If the user-supplied color in drawbox and drawgrid filters is non-opaque,
the box & grid painting overwrites the input's pixels (including alpha).
Users typically expect the alpha of the specified color to only act as a key
for compositing on top of the main input.
Added option allows users to select between replacement and composition.
Tested and documented.
Additionally:
* Mention that allrgb and allyuv do not support the "size" option.
* Separate examples into subsection.
Fixes ticket #6906.
Signed-off-by: Lou Logan <lou@lrcd.com>
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).
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>
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>
Correct typo in signalstats filter section and qualify description for variable
in select filter.
Signed-off-by: Gyan Doshi <gyandoshi@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Allows to specify the action to be performed when reading the last frame
from the internal FIFO buffer. By default the last frame is written to
filter output depending on the timestamp rounding method. When using
"pass" action the last frame is passed through if input duration
has not been reached yet.
Examples using an input file with 25Hz, 1.4sec duration:
- "fps=fps=1:round=near" generates an output file of 1sec
- "fps=fps=1:round=near:eof_action=pass" generates an output file of
2sec
Signed-off-by: Tobias Rapp <t.rapp@noa-archive.com>
Align order of "start_time" option within fps filter documentation to actual
implementation. Also fix some documentation cosmetics.
Signed-off-by: Tobias Rapp <t.rapp@noa-archive.com>
Paul B Mahol
Kyle Swanson
Mark Thompson
Marton Balint
Gyan Doshi
Lou Logan
Richard Ling
Werner Robitza
Ashish Pratap Singh
Carl Eugen Hoyos
Bjorn Roche
Tobias Rapp
Nicolas George
Michael Niedermayer