59.94 fps upload: 60 fps 'Quality' option & 59.94 fps playback

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60 frames per second (fps) HD "quality" option when source upload is 59.94 fps HD video - playback is actually 59.94 fps. SD "quality" playback is 29.97 fps.

MediaInfo of source upload
General
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42
File size : 573 MiB
Duration : 1mn 1s
Overall bit rate : 78.1 Mbps

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format settings, CABAC : No
Format settings, ReFrames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 1s
Source duration : 1mn 2s
Bit rate : 76.4 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 1.383
Stream size : 560 MiB (98%)
Source stream size : 571 MiB (100%)
Language : English
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio
ID : 1
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 1mn 1s
Source duration : 1mn 1s
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 1.39 MiB (0%)
Source stream size : 1.39 MiB (0%)
Language : English
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Комментарии
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Thanks for confirming that playback is indeed 59.94fps and not 60fps causing out of sync audio! 

DextahPC
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Thank you very much I don't understands why there's dislikes

sansavatar
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so if I upload a 1080p 59.94 fps video the quality option will have 1080p60 as a quality option?

TheNuclearBrony
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I also upload 60fps videos, but it was 720p60.

joshuaroeser
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All the answers and background information/context you need to understand why 29.97 and 59.94 even exist.

DeathBringer