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Reduce compression blocking in video with FFmpeg deblock
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What this guide covers
For editors with a heavily compressed clip showing visible blocks in flat areas such as sky. You end with weak and strong deblock settings to compare against the source. Documentary review of the FFmpeg manual; no command was run.
More about this guide
Guide ID: art_01M6W5EPNJH41S0WW2GBP8BEMM
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Guide title
Reduce compression blocking in video with FFmpeg deblock
Coverage
For editors with a heavily compressed clip showing visible blocks in flat areas such as sky. You end with weak and strong deblock settings to compare against the source. Documentary review of the FFmpeg manual; no command was run.
Example
A hypothetical low-bitrate clip with 8 by 8 blocks is run through the weak string and then the strong string with raised thresholds and compared; nothing was run.
Useful starting points
- Setting any threshold to 0 disables deblocking, so no visible change can mean a zero value.
- If detail looks soft, switch to the weak filter or lower the thresholds.
- If blocks remain at a different spacing, change the block size to match the codec's.
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