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並前往https://books.google.com.tw/books?id=Mk3sW0on7OAC&pg=PA109&lpg=PA109&dq=ffmpeg+aspect&source=bl&ots=Cn7FNbHRli&sig=ACfU3U0NsREEli_uEDbJXK8nKNgzuPZPCA&hl=zh-TW&sa=X&ved=2ahUKEwiwofW5wNP0AhV4QUEAHQDmCf8Q6AF6BAgYEAM

HTML5: Up and Running: Dive into the Future of Web Development

Most of the ffmpeg command line has nothing to do with VP8 or WebM. libvp8 ... -i pr6.dv -vcodec libvpx_vp8 -b 614400 -s 320x240 -aspect 4:3 -acodec vorbis ...

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