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--- doc:appunti:linux:video:olive_editor_tools [2024/02/25 16:02] – [Export Media] niccolo
+++ doc:appunti:linux:video:olive_editor_tools [2024/04/16 08:02] (current) – niccolo
@@ Line 29: / Line 29: @@
 ===== Export Media =====
+It seems that the //Export media// dialog box does not fully support the handling of presets: when you save and re-load a preset, not all the settings are restored (checked with Olive 0.2.0-55eedbfc). So it is best to check every settings before doing the final video export.
-^ Format              | Matroska Video  |
+Here they are my preferred settings to produce **HD-Ready 780p** and **Full HD 1080p** videos.
-^ Codec               | H.264  |
-^ Encode Speed        | Very Slow  |
+^  Export Video  ^^
-^ Compression Method  | Target Bit Rate  |
+^ Format                   | Matroska Video           |
-^ Pixel Format        | yuv420p\\ The improvement achievable using yuv422p is visually imperceptible and some players only support yuv420.  |
+^ Width x Height           | 1920×1080 or 1366×768    |
-^ YUV Color Range     | Full (0-255)  |
+^ Quality                  | Full-Float (32-bit) (1)  |
+^ Codec                    | H.264                    |
+^ Encode Speed             | Very Slow (2)            |
+^ Compression Method       | Target Bit Rate          |
+^ Target Bit Rate (Mbps)   | 8 or 4 Mbit (3)          |
+^ Maximum Bit Rate (Mbps)  | 8 or 4 Mbit (3)          |
+^ Two Pass                 | Yes                      |
+^ Pixel Format             | yuv420p (4)              |
+^ YUV Color Range          | Full (0-255)             |
+^ Color Space              | Rec.709 OETF (5)         |
+^  Export Audio  ^^
+^ Codec                    | Vorbis        |
+^ Sample Rate              | 48000 Hz      |
+^ Channel Layout           | Stereo        |
+^ Format                   | Float 32-bit  |
+^ Bit Rate                 | 192 kbps      |
+  - The proposed values are: //8-bit//, //16-bit Integer//, //Half-Float(16-bit)// and //Full-Float (32-bit)//. It is not clear what the //Quality// option means here, may be it is what ffmpeg calls //bits_per_raw_sample//. We made some experiment with **Olive 0.2.0-55eedbfc** and we found no differences at all on exports at 8-bit or at Full-Float 32-bit (the files produced were analyzed with with ffprobe and mediainfo). Our input footages have 8-bit per raw sample, so we may stay with it, but it seems that there are no drwaback in choosing the higer setting Full-Float 32-bit.
+  - Depending on the combination of the //Qaulity// and //Encode Speed// options, the resulting video can use the video format profile **High@L3.2** or **High@L5**. Make some tests if this is important to you.
+  - 8 Mbit is suitable for an high quality video, Full HD 1080p, but 4 Mbit is acceptable for a normal quality video.
+  - The improvement achievable using yuv422p or yuv444p is visually imperceptible and some players only support yuv420.
+  - There are no substantial differences in the ability to represent colors between the sRGB, Rec.701 and Rec.601 color spaces, but almost any player expecting high definition videos will accept Rec.709.