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08 February 2018 - Remove Grain and Black Frames Detection

about 6 years ago by Encoding.com Product Team

Remove Grain Video Filter

<?xml version="1.0"?>
<query>
    <action>AddMedia</action>
    <userid><<id>></userid>
    <userkey><<key>></userkey>
    <format>
        <output>[SingleBitrateVideoOutput]</output>
        <remove_grain>[m1:m2:m3:m4]</remove_grain>
    </format>
</query>

{
    "query": {
        "action": "AddMedia",
        "userid": "<<id>>",
        "userkey": "<<key>>",
        "format": {
            "output": "[SingleBitrateVideoOutput]",
            "remove_grain": "[m1:m2:m3:m4]"
        }
    }
}

<?xml version="1.0"?>
<query>
    <action>AddMedia</action>
    <userid><<id>></userid>
    <userkey><<key>></userkey>
    <format>
        <output>[AdvancedMultiBitrateVideoOutput]</output>
        <stream>
            <remove_grain>[m1:m2:m3:m4]</remove_grain>
        </stream>
    </format>
</query>

{
    "query": {
        "action": "AddMedia",
        "userid": "<<id>>",
        "userkey": "<<key>>",
        "format": {
            "output": "[AdvancedMultiBitrateVideoOutput]",
            "stream": {
                "remove_grain": "[m1:m2:m3:m4]"
            }
        }
    }
}
Field NameDescriptionAllowed ValuesDefault Values
remove_grainThe removegrain filter is a spatial denoiser for progressive video.4 integer numbers(from 0 to 23 including) separated with colon.
Each number specifies filter for each plane.
For example: 4:4:4:4
Available modes:

0 - Leave input plane unchanged. Default.
 1 - Clips the pixel with the minimum and maximum
of the 8 neighbour pixels.
2 - Clips the pixel with the second minimum and maximum
of the 8 neighbour pixels.
 3 - Clips the pixel with the third minimum and maximum
of the 8 neighbour pixels.
4 - Clips the pixel with the fourth minimum and maximum
of the 8 neighbour pixels. This is equivalent to a median filter.
 5 - Line-sensitive clipping giving the minimal change.
6 - Line-sensitive clipping, intermediate.
 7 - Line-sensitive clipping, intermediate.
8 - Line-sensitive clipping, intermediate.
 9 - Line-sensitive clipping on a line where the neighbours pixels
are the closest.
10 - Replaces the target pixel with the closest neighbour.
 11 - [1 2 1] horizontal and vertical kernel blur.
12 - Same as mode 11.
 13 - Bob mode, interpolates top field from the line
where the neighbours pixels are the closest.
14 - Bob mode, interpolates bottom field from the line
where the neighbours pixels are the closest.
 15 - Bob mode, interpolates top field. Same as 13 but with
a more complicated interpolation formula.
16 - Bob mode, interpolates bottom field. Same as 14 but with
a more complicated interpolation formula.
 17 - Clips the pixel with the minimum and maximum of
respectively the maximum and minimum
of each pair of opposite neighbour pixels.
18 - Line-sensitive clipping using opposite neighbours
whose greatest distance from the current pixel is minimal.
 19 - Replaces the pixel with the average of its 8 neighbours.
20 - Averages the 9 pixels ([1 1 1] horizontal and vertical blur).
 21 - Clips pixels using the averages of opposite neighbour.
22 - Same as mode 21 but simpler and faster.
 23 - Small edge and halo removal, but reputed useless.		 

Black Frames Detection

🚧

Note

This feature doesn't work with subtitles.

📘

Note

Maximum number of "black" segments to clip out is limited to 150.

<?xml version="1.0"?>
<query>
    <action>AddMedia</action>
    <userid><<id>></userid>
    <userkey><<key>></userkey>
    <format>
        <cut_black>
            <enable>[yes|no]</enable>
            <black_min_duration>[Duration]</black_min_duration>
            <pixel_black>[PixelThreshold]</pixel_black>
            <picture_black_ratio>[PictureThreshold]</picture_black_ratio>
        </cut_black>
    </format>
</query>

{
    "query": {
        "action": "AddMedia",
        "userid": "<<id>>",
        "userkey": "<<key>>",
        "format": {
            "cut_black": {
                "enable": "[yes|no]",
                "black_min_duration": "[Duration]",
                "pixel_black": "[PixelThreshold]",
                "picture_black_ratio": "[PictureThreshold]"
            }
        }
    }
}
Field NameDescriptionAllowed ValuesDefault Values
enableEnable "black" detection and clipping outyes, nono
black_min_durationThe shortest "black" duration in secondsPositive float number2
pixel_blackThreshold for classification pixels as "black"Positive float number lesser than 1
0 - Pixel must be absolutely black to be classified as "black"
0.99 - The lightest pixels would be classified as "black"		0
picture_black_ratioThreshold for classification frame as "black"Positive float number less or equals to 1
1 - Frame must have only "black" pixels to be classified as "black" frame
0 - Frame can have no "black" pixels to be classified as "black" frame		1