doc:appunti:linux:video:ffmpeg_final_rendering
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| doc:appunti:linux:video:ffmpeg_final_rendering [2024/07/31 09:56] – niccolo | doc:appunti:linux:video:ffmpeg_final_rendering [2026/08/23 21:03] (current) – [Pixel format considerations] niccolo | ||
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| ===== Two pass encoding ===== | ===== Two pass encoding ===== | ||
| - | Here it is a recipe of **two-pass encoding** from an high quality //master// produced with Olive Video Editor. The target video will be a **6 Mbit** stream, **1920x1080@30**. The profile level selected is **High@L4.1**, | + | Here it is a recipe of **two-pass encoding** from an high quality //master// produced with [[olive_editor_tools# |
| <code bash> | <code bash> | ||
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| {{subsampling.png? | {{subsampling.png? | ||
| - | Is file size is not a concern, we might ask ourselves whether a pixel format with less loss of chroma information would be preferable. Obviously is useless to add more chroma information if the final rendering has the same resolution of the original video, but if we are **scaling down** the video resolution we may **retain chroma information** using a different pixel format. | + | If file size is not a concern, we might ask ourselves whether a pixel format with less loss of chroma information would be preferable. Obviously is useless to add more chroma information if the final rendering has the same resolution of the original video, but if we are **scaling down** the video resolution we may **retain chroma information** using a different pixel format. |
| The fact is that **in movies 4:2:0 is almost lossless visually**, which is why it can be found used in Blu-ray discs and a lot of modern video cameras. There is virtually no advantage to using 4:4:4 for consuming video content. | The fact is that **in movies 4:2:0 is almost lossless visually**, which is why it can be found used in Blu-ray discs and a lot of modern video cameras. There is virtually no advantage to using 4:4:4 for consuming video content. | ||
doc/appunti/linux/video/ffmpeg_final_rendering.1722412612.txt.gz · Last modified: by niccolo
