![]() Get amazing performance from the Mercury Playback Engine on both desktops and laptops (Windows® and Mac OS). Work smoothly with the enhanced 64-bit Adobe® Mercury Playback Engine, now on workstations and laptops GPU acceleration and the ability to adjust playback resolution in the Source or Program Monitor in Adobe Premiere® Pro CS5.5 software. Ready to switch to the ultimate toolset for video pros? Get breakthrough performance on workstations and laptops streamline collaboration and boost productivity with an efficient, robust, cross-platform editing workflow. Further if you are trying to adjust something like the brightness of a scene the luma channel may be the most important value to measure.Adobe® Premiere® Pro CS5.5 software lets you edit faster with true native format support. Also depending on your target, ensuring broadcast legal values may be important. Most output formats are still YUV so you will be monitoring what your output will be. Using the scopes to monitor YUV values has several purposes. How we present controls to an effect is not always directly correlated to how it is rendered. If you are looking for an example of chroma showing up in an effect's UI, video limiter would be one example. 32-bit floating point RGB does not have either of these problems.Ĥ) Many effects work directly in YUV. Second a given YUV pixel value may map to a fractional RGB pixel value at which point we have to round to the nearest. First some YUV values will map to negative RGB values or RGB values greater than 255 and we will clamp to those limits. Where possible we process and preserve YUV data all the way until display where we will convert on the fly.Ģ) Only the track items containing non-YUV effects will be converted to RGB, and only for the non-RGB effects.ģ) Information can be lost in two ways. Scopes are generated using YUV data and so will include all the detail not possible with RGB.ġ) Generally the same color processing occurs during playback as export. A few formats like JPEG use RGB data for the render as that is what they support. If the exporter supports YUV the render will take place in YUV. During transcoding we generally base the working format on the export type. Note that all CUDA accelerated effects are always 32-bit float, even where the software equivalent is not (eg crop). Effects & transitions that work in 32-bit float but not YUV can are also important as 32-bit float RGB generally supports the precision and range to cover all 8-bit YUV values. There is no intermediate conversion to RGB for YUV badged effects. Yes, effects and transitions without the YUV badge need to convert to RGB to process, then we go back to YUV if any further processing is needed. We will only upsample to 4:4:4 when we need to process the data in that form, if you have 4:2:2 data at the start, are exporting to a format with similar requirements, and have nothing in between, we will generally keep the data as 4:2:2. We do support importing and preserving YUV data in its native format through all of our rendering pipeline and many effects. Your understanding is mostly correct, a few notes: So, what is the best use and approach when working with the YCbCr Parade scope? Correct? When working with YUV tagged effects, there is no intermediary conversion to RGB, which is a good thing.īut beyond that, does all video work in the YCbCr color space? What happens when transcoding? Is there an optimum workflow?Īlso, what about the YCbCr Parade scope? The YC Waveform, RGB Parade and Vectorscope are all intuitive largely because P Pro's display and effects are RGB oriented (despite the numerous effects with YUV tags). ![]() That said, when applying non-YUV tagged video effects or transitions, the YUV video is converted to RGB, the effects or transitions are applied, and then it is converted back to YUV losing some quality along the way. ![]() Then converts that on-the-fly to RGB for display on computer monitors but retains the upsampled YUV for actual editing. ![]() As I understand it, Premiere Pro handles color and luminance in a variety of ways depending on what you are doing with the video.įor example, with cuts-only editing, P Pro upsamples YUV (Y Cb Cr) video from its native native sample rate (4:2:2, 4:1:1, 4:2:0) to 4:4:4.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |