\item[Histogram] remaps the color space. The color space ranges from $0-255$ for 8-bit color values. You can use this tool to remap the color space to use the entire space or for stretching the contrast. Also, it lets you perform global color-correction on the image. You can use this to correct for color screens that are \textit{too blue}, or for color Televisions that produce \textit{brownish} output, or whatever. In addition to color-correction, you can use the RGB modification tool to add color to images that didn't have color to begin with. For instance, you can \textit{pseudo-color} greyscale media.
\item[Inverse Telecine] the reverse of $3:2$ pulldown where frames, which were duplicated to create 60-fields/second video from 24-frames/second film, are removed. MPEG-2 video encoders usually apply an inverse Telecine process to convert 60-fields/second video into 24-frames/second encoded video. The encoder adds information enabling the decoder to recreate the 60-fields/second display rate. \textit{Telecine}, i.e. $3:2$ pulldown, is used to transfer film to video. That's where the $3:2$ ratio comes in. To ensure that there will consistently be 60 frames per second, the first frame is displayed on the TV screen 3 times and the second frame is displayed 2 times. The following frame is repeated 3 times, the next one 2 times, etc. throughout the film. For inverse telecine, you show 2 of the film frames for 3 of output frames. Only check \textit{Inverse Telecine} if you have film or something that is $24fps$ and want to project to $30fps$ (most likely this will never be necessary).
\item[Audio 5.1] 6 channel surround sound. For most home systems, uses five full bandwidth channels and one low-frequency effects channel. Could automatically get set as explained previously.
\item[Aspect Ratio] aspect ratio may be automatically set to $4:3$ or $16:9$. Aspect ratio would better be defined as the size of the display, monitor, or TV which will be used to view the output. If you measure your old TV, which supposedly is $4:3$ and your latest digital TV, which is supposedly $16:9$, you will see that those ratios aren't always correct anyway. Then measure your laptop monitor, your desktop monitor, and your neighbor's, and lo and behold, the ratios don't fit either of the purported \textit{standard} aspect ratio. Maintaining square pixels via scaling is more important in the long run.
\item[Use FFMPEG] this is user's choice; it is recommended and faster but more difficult to modify due to numerous options. For blu-ray, ffmpeg must be used and is not an available option.
\item[Resize Tracks] change track width and height as explained previously. The size is adjusted to the largest frame size needed.
\item[Histogram] remaps the color space. The color space ranges from $0-255$ for 8-bit color values. You can use this tool to remap the color space to use the entire space or for stretching the contrast. Also, it lets you perform global color-correction on the image. You can use this to correct for color screens that are \textit{too blue}, or for color Televisions that produce \textit{brownish} output, or whatever. In addition to color-correction, you can use the RGB modification tool to add color to images that didn't have color to begin with. For instance, you can \textit{pseudo-color} greyscale media.
\item[Inverse Telecine] the reverse of $3:2$ pulldown where frames, which were duplicated to create 60-fields/second video from 24-frames/second film, are removed. MPEG-2 video encoders usually apply an inverse Telecine process to convert 60-fields/second video into 24-frames/second encoded video. The encoder adds information enabling the decoder to recreate the 60-fields/second display rate. \textit{Telecine}, i.e. $3:2$ pulldown, is used to transfer film to video. That's where the $3:2$ ratio comes in. To ensure that there will consistently be 60 frames per second, the first frame is displayed on the TV screen 3 times and the second frame is displayed 2 times. The following frame is repeated 3 times, the next one 2 times, etc. throughout the film. For inverse telecine, you show 2 of the film frames for 3 of output frames. Only check \textit{Inverse Telecine} if you have film or something that is $24fps$ and want to project to $30fps$ (most likely this will never be necessary).
\item[Audio 5.1] 6 channel surround sound. For most home systems, uses five full bandwidth channels and one low-frequency effects channel. Could automatically get set as explained previously.
\item[Aspect Ratio] aspect ratio may be automatically set to $4:3$ or $16:9$. Aspect ratio would better be defined as the size of the display, monitor, or TV which will be used to view the output. If you measure your old TV, which supposedly is $4:3$ and your latest digital TV, which is supposedly $16:9$, you will see that those ratios aren't always correct anyway. Then measure your laptop monitor, your desktop monitor, and your neighbor's, and lo and behold, the ratios don't fit either of the purported \textit{standard} aspect ratio. Maintaining square pixels via scaling is more important in the long run.
\item[Use FFMPEG] this is user's choice; it is recommended and faster but more difficult to modify due to numerous options. For blu-ray, ffmpeg must be used and is not an available option.
\item[Resize Tracks] change track width and height as explained previously. The size is adjusted to the largest frame size needed.