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Wrong identification of 60fps streams as 30fps streams #12646

@shuttittuppitt

Description

@shuttittuppitt

Checklist

  • I am able to reproduce the bug with the latest version given here: CLICK THIS LINK.
  • I made sure that there are no existing issues - open or closed - which I could contribute my information to.
  • I have read the FAQ and my problem isn't listed.
  • I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
  • This issue contains only one bug.
  • I have read and understood the contribution guidelines.

Affected version

0.28.0

Steps to reproduce the bug

(1) Go to a youtube video. Example = https://www.youtube.com/watch?v=PExhP3Oq37U
(2) Press the "Play" button for the video (might not be needed, but it always seems to make downloading a video faster).
(3) Press the "Download" button for the video.
(4) In the list of available (video) streams for that video, find 2 similar streams, in this case, 1080p & 1080p60.
(5) Choose the 1080p stream & download it.

Expected behavior

(1) After the video has downloaded, find & open the video using a program that can analyse the details of videos. For me, I use "Media info" for android.
(2) "Media info" should identify the downloaded video as 30fps.

Actual behavior

"Media info" identifies the downloaded video as 60fps, NOT 30fps.

Screenshots/Screen recordings

I'm unsure if this has been reported before or not. (I DID search through the topics using "frame rate", & searched through both open & closed ones.) Despite that, I myself only noticed it today, but this may be an old(ish) problem.

For some videos, NewPipe may be wrongly mis-identifying 60fps streams as 30fps streams. At the bottom of this topic is one example video. When you click NewPipe's download button, 2 of the available choices that it shows are 1080p & 1080p60. After I became aware of this (minor) mis-identification, I downloaded both versions (one at a time), then opened each one in "Media info". According to "Media info", BOTH versions are 60fps.

This may be partly or entirely Youtube's fault, in which case there may be little that NewPipe can do about it, but I suggest at least one possible fix in that case. If Youtube itself is wrongly identifying 60fps streams as 30fps streams, then perhaps a way could be added to NewPipe to "test" a stream's fps, which could then be used to correct any mistakes in the identification of a stream's fps.

Be aware that I am not requesting that NewPipe should convert 60fps streams into 30fps videos. This concerns only the correct identification of 60fps streams that are being wrongly mis-identified as 30fps streams.

EXAMPLE VIDEO
https://www.youtube.com/watch?v=PExhP3Oq37U

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