Fixes #8111
Reviewed-by: NGyan Doshi <ffmpeg@gyani.pro>

Add the support of dehaze filter in existing derain filter source
code. As the processing procedure in FFmpeg is the same for current
derain and dehaze, we reuse the derain filter source code. The
model training and generation scripts are in repo
https://github.com/XueweiMeng/derain_filter.gitReviewed-by: NSteven Liu <lq@onvideo.cn>
Signed-off-by: NXuewei Meng <xwmeng96@gmail.com>

Add the usage of tensorflow model in derain filter. Training scripts
as well as scripts for tf/native model generation are provided in the
repository at https://github.com/XueweiMeng/derain_filter.git.
Reviewed-by: NSteven Liu <lq@onvideo.cn>
Signed-off-by: NXuewei Meng <xwmeng96@gmail.com>

Signed-off-by: NEugene Lyapustin <unishifft@gmail.com>

Signed-off-by: NEugene Lyapustin <unishifft@gmail.com>

Signed-off-by: NEugene Lyapustin <unishifft@gmail.com>

This patch adds a new option to the scale filter which ensures that the
output resolution is divisible by the given integer when used together
with `force_original_aspect_ratio`. This works similar to using `-n` in
the `w` and `h` options.

This option respects the value set for `force_original_aspect_ratio`,
increasing or decreasing the resolution accordingly.

The use case for this is to set a fixed target resolution using `w` and
`h`, to use the `force_original_aspect_ratio` option to make sure that
the video always fits in the defined bounding box regardless of aspect
ratio, but to also make sure that the calculated output resolution is
divisible by n so in can be encoded with certain encoders/options if
that is required.
Signed-off-by: NLars Kiesow <lkiesow@uos.de>
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

This can be used to add region of interest side data to video frames.

The previous solution was very bad.

Next step after this one will be adding support for more window sizes.

Changes to vf_drawtext.c written by
Calvin Walton <calvin.walton@kepstin.ca>

Changes to filters.texi written by
greg Luce <electron.rotoscope@gmail.com>
with lots of help from Moritz Barsnick and Gyan

Fixes #7947.

Document missing options for scale in/out color matrix
Reviewed-by: NGyan Doshi <ffmpeg@gyani.pro>
Signed-off-by: NJun Zhao <barryjzhao@tencent.com>

Signed-off-by: Guo, Yejun <yejun.guo@intel.com>

Document the pict_type constant. Clarify availability of metadata.
Minor grammar fixes.

Written with the help of Gyan and kepstin

Signed-off-by: NLimin Wang <lance.lmwang@gmail.com>
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

Remove the rain in the input image/video by applying the derain
methods based on convolutional neural networks. Training scripts
as well as scripts for model generation are provided in the
repository at https://github.com/XueweiMeng/derain_filter.git.
Signed-off-by: NXuewei Meng <xwmeng96@gmail.com>

Signed-off-by: NMarton Balint <cus@passwd.hu>

Reviewed-by: NMark Thompson <sw@jkqxz.net>
Signed-off-by: NRuiling Song <ruiling.song@intel.com>