Interlaced stream looks shaky if the reference frame =1 using Yadifx2

[cdguy]

the actual YADIF filters works very well if the reference frames are 4 or more;

However, if the reference frame of the interlaced stream is 1; the yadifx2 filter output shaky image; for this reason I have to use the yadifx1 filter to not have a shaky image.

I will send you 2 links the first one is an interlaced stream which has only 1 reference frame the second one is an interlaced stream which has 4 reference frames. (I send you this one to make sure that after your code change, this stream is not affected)

Thank you!

[kingslay]

mpv会有这个问题吗

[cdguy]

mpv会有这个问题吗

yes same issue with MPV; only VLC plays it correctly.

For this kind of stream yadifx1 does not look bad, maybe if you add an automated function in your code like:

if stream is interlaced AND has only 1 reference frame; then use yadifx1 filter

this would be more than enough

Thanks!

@kingslay

[kingslay]

好的 我看下流信息可不可以拿到这个信息

[cdguy]

the ios app of this application displays the reference frames https://mediaarea.net/en/MediaInfo

https://apps.apple.com/gb/app/mediainfo/id1448983823?uo=4&mt=8

@kingslay

[kingslay]

我不是根据reference frame 来进行判断。我对比了两个流，用realFrameRate和avgFrameRate来进行了判断。你可以多尝试更多的流。看下这个判断准不准。@cdguy

[kingslay]

我昨天发邮件跟苹果反馈了testfligth 的审核问题。他们说他们会看下这个审核的问题

[cdguy]

@kingslay before trying this; do you have an ios device that has 120hz refresh rate? I will ask a question if you have one

[kingslay]

现在很少有120hz的电影吧。最多60hz吧

[cdguy]

It is not about that I just purchased an iphone 15 pro, which has (as you know) 120hz refresh rate screen.

when I play an interlaced stream (Yadifx1or Yadifx2) Look at the sliding text. It stops scrolling for a fraction of a second

https://github.com/kingslay/KSPlayer/assets/123307657/0d0d294a-8425-449f-9542-1d665d0039ec

It happens only with 120hz screen ios devices. @djokt can also confirm this

[djokt]

Indeed, it creates a freeze every +/- 2s

[kingslay]

这个120hz的问题。在mpv上也会有吗？

[cdguy]

All smooth on MPV @kingslay

[cdguy]

@kingslay as I previously mentioned here https://github.com/kingslay/KSPlayer/issues/525#issuecomment-1681936334 MPV adapts the output refresh rate according to the device screen’s refresh rate