From an answer by IgorBeg on the forum I learn that for 1:1 proxies, if you set the "scale factor," you have double scaling: "The size of your video is scaled down of the Scale factor but, then, it is rescaled up to the project format. For example, your format project is 1920x1080 and Proxy's Scale factor is 1/4, then your videos will be scaled down to 480x270 and then up-scaled to 1920x1080. For an old computer, this option is not recommended."
I put this sentence in the manual, you tell me if it is okay.
сб, 17 дек. 2022 г., 00:11 Andrea paz via Cin <[email protected]>:
From an answer by IgorBeg on the forum I learn that for 1:1 proxies, if you set the "scale factor," you have double scaling: "The size of your video is scaled down of the Scale factor but, then, it is rescaled up to the project format. For example, your format project is 1920x1080 and Proxy's Scale factor is 1/4, then your videos will be scaled down to 480x270 and then up-scaled to 1920x1080. For an old computer, this option is not recommended."
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is not this only true if you select 'rescaled to project size (ffmpeg only)'?
I put this sentence in the manual, you tell me if it is okay. -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
Andrea, good! I was hoping you would do that. I checked this change into GIT along with clarification related to bdwrite and how to get it out of appimage, etc. On Fri, Dec 16, 2022 at 2:11 PM Andrea paz via Cin < [email protected]> wrote:
From an answer by IgorBeg on the forum I learn that for 1:1 proxies, if you set the "scale factor," you have double scaling: "The size of your video is scaled down of the Scale factor but, then, it is rescaled up to the project format. For example, your format project is 1920x1080 and Proxy's Scale factor is 1/4, then your videos will be scaled down to 480x270 and then up-scaled to 1920x1080. For an old computer, this option is not recommended."
I put this sentence in the manual, you tell me if it is okay. -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
Reading the OnLine Manual (2022-12-18) about Proxy, I think that it is focused on Proxy 1:1 but it shouldn't be like that. Maybe it would be enough to replace 1:1 with 1:2 in some places. From my point of view, Scale Factor 1:1 (proxy 1:1) is a special case of Proxy and implemented for an user request (or two users) time ago. When an user reads the Proxy chapter She/He should be quickly directed to its use and then explained how it works. To help the user and simplify his choices, I think two main options should be indicate: with or without "Rescaled to project size (FFMPEG only)". Then the user chooses the Scale Factor. And, finally the File Format. Three steps: 1. Checked or unchecked "Rescaled to Project size" 2. Set the Scale Factor 3. Set the File Format (default MPEG/MOV) 3.1 Set the Codec, bitrate,... For old computer "Rescaled to Project size" = CHECKED is not recommended. On the other hand when "Rescaled to Project size" is UNCHECKED some Effects doesn't work as expected because they use pixel values instead of percentage values referred to the Project format. For example Perspective plugin works right because coordinates are referred to percentage values. Title and Blur plugin work using pixel values, so they won't work as you would expect. Quote from Manual: "The assets in both the Media folder and Proxy folder will look proxied when dragged to the Viewer although the scale may be different." Mmh, this sentence is not right. When Proxy is enabled you MUST Drag and Drop from Proxy bin NOT from Media bin. (Sorry for my bad English) IgorBeg
participants (4)
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Andrea paz -
Andrew Randrianasulu -
Igor BEGHETTO -
Phyllis Smith