X-Git-Url: https://git.cinelerra-gg.org/git/?a=blobdiff_plain;f=parts%2FAdvanced.tex;h=be32f91a95ad4a98c0642b217f737cc92a60a131;hb=6b141be7b2c5f36d4c8792c65f4d092b933672c5;hp=007499393e1a053d5025229b528e6548a79dc53c;hpb=3b4f72de060e76d9fba0a05658a18f89c7bbf678;p=goodguy%2Fcin-manual-latex.git diff --git a/parts/Advanced.tex b/parts/Advanced.tex index 0074993..be32f91 100644 --- a/parts/Advanced.tex +++ b/parts/Advanced.tex @@ -185,7 +185,7 @@ Multiple stream media will only transcode the first stream (this would be like t You will get an error message if you already have a transcoded file in the selected format with the same suffix name and try to transcode it again with a different selection made -- you will have to delete that file first. An example would be an already converted file that has both video and audio and now you request video only. -The BIGGEST gain from using this is if you have media that is not \textit{seekable} \index{seek}, that is, you can play it from the beginning but can not move to another spot and have the audio or video play correctly. A video file with no keyframes makes seeking next to impossible, but then a Transcode generally adds these keyframes. This is particularly useful for the \texttt{mkv} container, which often has seek problems. +The BIGGEST gain from using this is if you have media that is not \textit{seekable} \index{seek}, that is, you can play it from the beginning but can not move to another spot and have the audio or video play correctly. A video file with no keyframes makes seeking next to impossible, but then a Transcode generally adds these keyframes. This is particularly useful for the \texttt{mkv} container, which often has seek problems. For more details on mkv container see \ref{ssub:note_mkv_container} Another important function of Transcode is being able to convert the project's media into a high-quality \textit{mezzanine} codec \index{mezzanine codec} (sometimes also called \textit{intermediate} codec \index{digital intermediate}), which makes timeline work lighter and more efficient. In fact such codecs (ffv1, ProRes, DNxHD, OpenEXR, huffyuv, etc) are generally little or not at all compressed; the type of compression is intraframe --more suitable for editing, and the image quality (4:2:2 up; 10-bit color up; floating point; etc) is suitable for \textit{Color Correction}, \textit{Chroma Key} and \textit{Rotoscoping}. The use of mezzanine codecs leads to very large files, so you need to make sure you have enough storage space.