Knowledgebase: MyVideoEncoder
Advanced Configuration
Posted by MVT VP on 13 May 2011 03:48 AM

If you do not know what these settings are, you better should click on "Back: Basic Configuration" and leave the advanced configuration settings as they are by default.

 

Advanced Configuration

  • Audio Bitrate

Usual values are as following : 32/48/64/96/112/128/144/160/192/224/256/320

For more details about Audio Bitrate follow this link

  • Video Bitrate

Compressed stream bitrate in kbits/second. For best results,  you'll need 4 (or multiples of 4) bytes per pixel!

For more details about Video Bitrate follow this link

  • Noise Reduction

Determines the level of noise filtering to apply in the preprocessor: 0 is no preprocessing, 6 is extreme prepocessing. The usage of noise sensitivity set to non-0 is an attempt to save bits by blurring the source. Sometimes the material  is so easy that this attempt to save bits may not only be unnecessary, it may actually hurt the visual quality by blurring.

Attention: This may cause more frames to be dropped in harder sections!

For more details about Noise Reduction follow this link

  • Keyframe Interval

The Keyframe frequency value in video frames. It has to be interpretated as the maximum allowable keyframes.

For more details about Keyframe Interval follow this link

  • Brightness

Parameter for the brightness adjustment factor. Determines the level by which to adjust the brighteness. Brightness is adjusted on a scale of -255 to 255, with 0 indicating no change. To increase the relativ brightness of the video, use a positive number. To descrease the relativ brighteness of the video, use a negativ number.

For more details about Brightness follow this link

  • Contrast

Parameter for the contrast adjustment factor. Determines the level by which to adjust the contrast. Contrast  is adjusted on a scale of  -255 to 255, with 0 indicating no change. To increase the relative contrast of the video, use a positive number. To descrease the relative contrast of the video, use a negative number.

For more details about Contrast follow this link

  • Hue

Parameter for the hue adjustment factor. Determines the level by which to adjust the hue. Hue is adjusted on a scale of -180 to 180, with 0 indicating no change. To adjust the hue of the video towards red, use a negative number. To adjust the hue of the video towards green, use a positive number.

For more details about Hue follow this link

  • Saturation

Parameter for the saturation adjustment factor. Determines the level by which to adjust saturation. Saturation is adjusted on a scale of -255 to 255, with 0 indicating no change.
To increase the relative saturation of the video, use a positive number. To decrease the relative saturation of the video, use a negative number.

For more details about Saturation follow this link

  • Framerate

Parameter which forces output movie to be encoded at specified number of frames per second. Use decimal values from 0 to 30 common framerate values are: 15/23.976/25/30.

For more details about Framerate follow this link

 

Crop/Resize Configuration

 

 

  • Crop Movie

This filter is used to isolate a subsection of an input image Left/Top/Right/Bottom- Parameter for setting bounding box's left coordinate. Default value:0, value must be a multiple of 2. Odd values will be silently adjusted down.

 

  • Resize Movie

The video scale (resize) filter implements a high quality bicubic scaler to change the dimensions of the video. Display aspect ratio is calculated based on the desired resolution, as set by the container, e.g., the input is encoded at 4:3, but displays at 16:9. Needless to say, this is clip dependent and requires the correct values be set within the container and forwarded from the input source. Values have to be greater or equal to -3.

  • Change Aspect Ratio

If you want to force a new aspect ratio for this movie then please feel free to enable this checkbox and choose one from the list:

4:3 - Computer monitor (VGA/XGA ) or SDTV
3:2 - 35mm film
16:10 - Widescreen computer monitor (WXGA)
16:9 - High definition television
1.85:1 - U.S. common cinema projection standard
2.39:1 - U.S. common cinema projection standard

For more details about Aspect Ratio follow this link

  • De-interlace

MovieThis variable helps the encoding server know which de-interlacing algorithm will it use in the case when your movie contains interlaced frames. The valid de-interlacing technologies available are: 1:2:1 blur [default ] /drop field/ adaptive/none.

For more details about De-interlace Movie follow this link

 

 


 

Codec Configuration

 

 

 

In this step you can set your desired configuration:

  • Sharpness

Control the sharpness of the image in the output. This setting does not impact  any other  setting and is largely a matter of personal preference. A low sharpness setting will result in fewer visible artifacts but may blur the image somewhat; a high sharpness will result in a sharper image but may result in more visible astifacts. Valid range: [0,10]. Default value: Automatic, bits per pixel dependent.

For more details follow this link

  • Undershoot percentage

This value is given as a percentage. Creates output that targets a slightly lower datarate so there are bits available in the buffer to improve difficult sections. Default value is 90.

  • Use Quantizer

Specific values in lossy data compression algorithm.

Attention: these values have absolute determinance over output's quality

For more details follow this link

  • Minimum Quantizer

Determines the quality of the output. A lower minimum number produces higher quality output, it's value cannot be smaller than 0 or greater than 63.

  • Maximum Quantizer

Determines the quality of the output. A lower maximum number  produces higher quality output, it's value cannot be smaller than 0 or greater than 63.

Attention: Setting this value too low willl likely cause the encoder to miss (i.e. overshoot) the target datarate specified, and you'll have a large amount of dropped frames.

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