llogan
2020-11-30 04:44:51
PGS是基于图像的字幕。
使用比例过滤器：
ffmpeg -i input.mkv -filter_complex "[0:v]scale=1920:1080[vid];[0:s:0]scale=1920:1080[sub];[vid][sub]overlay[v]" -map "[v]" -map 0:a:0 output.mkv
或添加scale2ref过滤器以自动缩放字幕以匹配视频的大小。
ffmpeg -i input.mkv -filter_complex "[0:v]scale=1920:1080[ref];[0:s:0][ref]scale2ref[sub][vid];[vid][sub]overlay[v]" -map "[v]" -map 0:a:0 output.mkv
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