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For noisy content post MPEG-2 -cu-lossless may not find a single block that it actually encodes differently.

Tune SSIM and PSNR will require a higher file size at the same subjective quality neither metric is great at film grain.

Lossless is almost certainly going to be higher bitrate than the original MPEG-2. Noisy video, try sub-optimal encode that preserves the signal strength and mitigate the quans or phys interference as much as possible in the present first encoding process, and maintains the best visual quality by some futuristic state-of-art encoder in the second encoding process (perhaps forever away). Try x265 -cu-lossless for not-so-clean video - Skip. Try x265 -lossless only for crystal clear video - Skip. If hard drive cost / data plan is the main concern, just compress them. Make a comparison between a high definition source and the upscaled DVDįind other perfect circles to measure such as clocks, car wheels, any kind of ball, etc but careful of the camera angle, the picture may be skewed.įor reference, the following table shows the various SAR and SDB MeGUI profiles for each source type where 'Aspect' and 'FrameSize' are the values reported by DGIndex:ĭVD | Aspect | FrameSize | ITU SAR & SDB Profile | Non-ITU SAR & SDB Profile If 4 pixels or less were cropped in total from the width to remove black borders it's most likely non-ITU If the DVD was produced around 2006 or later it's most likely non-ITU

Additional methods that can help determine if the source is ITU or non-ITU: