MP4-ийг 3GP болгон хөрвүүлэхдээ эхний дүрсний хурдыг хадгалж болох уу?
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By default, framerate is unchanged (MP4 24fps stays 24fps in 3GP). If you need to change it (e.g. interlaced 29.97 → progressive 30fps), use the framerate option, which handles 3:2 pulldown and deinterlacing in the same pass.