Question about proxies and wide gamut screen ICC profile
Hello, I may have missed it in the manual, and I haven't done it in a long time. So I am looking for recommendations. What proxies do you recommend if the mixed footage include .MTS or .mov files compressed with H.264/MPEG-4 AVC; 1080 24p to 60p. My main computer is older (AMD Phenom II 4 965 3.4Ghz and NVDIA GTS 250 1G, Sata drives) and in the past I had to convert to dnxhd proxy. Is it still the same process? Also if I am using a generic ICC file for my wide gamut screen that was offered in Ubuntu studio. Should I switch to sRGB profile since final product will be streamed in Vimeo and YouTube? Thankyou Tanya
Tanya,
What proxies do you recommend ...?
I think IgorBeg was using the following on his older computer (Charlie) and this is what is suggested in the manual: "A good choice for proxy settings with 1080p source video is:" Scale Factor: 1/4 Use Scaler: unchecked File Format: FFMPEG -mpeg Video Preset: Compression: mpeg.mpeg Bitrate: 1800000 Quality: -1 Pixels: yuv420p Is it still the same process?
I am not sure how to answer the above but the proxy code/methodology has been in place since September 2017 with only fixes and minor adjustments added.
Also if I am using a generic ICC file for my wide gamut screen that was offered in Ubuntu studio. Should I switch to sRGB profile since final product will be streamed in Vimeo and YouTube?
?? Someone else will have to answer this as it is way beyond my capability!
I'm not very competent in Color Management. I think that every monitor should be calibrated, that is to have a personalized ICC. In this way the monitor reproduces the colors of the edit in the Timeline "quite" correctly. Is the ICC you use specific to your monitor? Then use it. Otherwise use the generic sRGB. Cinelerra GG has no real color management, so what we can aim for is to be satisfied with the result on our screen and hope it doesn't change too much on other monitors. Another tip is to specify, when rendering, the color parameters in the relevant wrench options window. These parameters are: colorspace= ... (color matrix) color_trc= … (transfer characteristic or gamma) color_primaries= … (gamut) They can take the values, for example, bt601, bt709 and bt2020. However, you have to understand that these parameters are only added metadata and do not affect the render. Their importance comes out when we open the file in a video player or browser, etc. Finally the suggestions of a colourist in an old message: https://lists.cinelerra-cv.org/pipermail/cinelerra/2018q4/009903.html Basically: examine the type of signal that your input media have and adjust the project in CinGG in accordance. If you use yuv media then set the project to YUVA 8 bit, etc. The rendering, then, you can set it as you like.
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Andrea paz -
Dragonfly -
Phyllis Smith