2019-01-30 18:27 GMT+01:00, Carl Zwanzig <[email protected]>: > On 1/30/2019 6:12 AM, Carl Eugen Hoyos wrote: >> You may have forgotten that while the vertical resolution is kept, >> horizontal resolution is reduced significantly for VHS, likely >> confusing the algorithm for detection of interlaced content. > > Exactly, VHS only has bandwidth of ~3MHz, so a horizontal > resolution of ~240 TV lines (not pixels). There can also be > a -lot- of variable horizontal smearing (plus other artifacts).
> AFAIK all VHS players produce an interlaced signal Of course (and what you write is correct to the best of my knowledge) but please note that - at least as far as I am concerned - this is not about the "signal" that is of course interlaced for analog PAL but the content that may of may not be interlaced (and the idet filter only looks at the content and nothing in FFmpeg is able to look at an analog video signal). Carl Eugen _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
