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>
* commit '4141a5a240fba44b4b4a1c488c279d7dd8a11ec7':
Use modern avconv syntax for codec selection in documentation and tests
Merged-by: James Almer <jamrial@gmail.com>
For the blue and violet noise, I took the pink and brown noise
respectively and subtracted the offsets instead of adding them. When I
eyeball the frequency spectrum of the resulting outputs it looks correct
to me, i.e. the blue graph appears to be a mirror image of the pink, and
the same can be said of the violet and the brown. I did not do anything
else to confirm the correctness.
This one changes the previous vmaf patch to libvmaf to keep it separate from the
native implementation of vmaf inside ffmpeg later.
Signed-off-by: Ashish Singh <ashk43712@gmail.com>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
