[youtube] 720p60 video downloads as 720p30

[spongbros]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.04.30
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--ignore-config', '-v', 'https://www.youtube.com/watch?v=o_gSw92_AQM']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2019.04.30
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.17763
[debug] exe versions: ffmpeg N-89980-ge752da5464, ffprobe N-89980-ge752da5464, rtmpdump 2.3
[debug] Proxy map: {}
[youtube] o_gSw92_AQM: Downloading webpage
[youtube] o_gSw92_AQM: Downloading video info webpage
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[debug] Invoking downloader on 'https://r1---sn-aigl6ney.googlevideo.com/videoplayback?id=o-AGqLZZ7etuPJt6iQJTMfXxu27RNNyRcFvlboqlTQnZPF&aitags=133%2C134%2C135%2C136%2C160%2C242%2C243%2C244%2C247%2C278%2C298%2C302&itag=136&source=youtube&requiressl=yes&mm=31%2C26&mn=sn-aigl6ney%2Csn-5hnekn7l&ms=au%2Conr&mv=m&pl=22&ei=7tLJXOCtLJ-LmLAP57-4yAw&initcwndbps=1875000&mime=video%2Fmp4&gir=yes&clen=975857289&dur=5769.199&lmt=1554626089844029&mt=1556730512&fvip=1&keepalive=yes&c=WEB&txp=5535432&ip=86.20.78.209&ipbits=0&expire=1556752206&sparams=ip%2Cipbits%2Cexpire%2Cid%2Caitags%2Csource%2Crequiressl%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cei%2Cinitcwndbps%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&signature=C1C531FB8E563012B2985FF7A6096643564715E7.659707323D3787D5AB05FC8749F5B0F79CA8EE34&key=yt8&ratebypass=yes'
[download] Destination: [Vinesauce] Vinny - Yoshi's Crafted World (part 2)-o_gSw92_AQM.f136.mp4
[download] 100% of 930.65MiB in 00:53
[debug] Invoking downloader on 'https://r1---sn-aigl6ney.googlevideo.com/videoplayback?id=o-AGqLZZ7etuPJt6iQJTMfXxu27RNNyRcFvlboqlTQnZPF&itag=251&source=youtube&requiressl=yes&mm=31%2C26&mn=sn-aigl6ney%2Csn-5hnekn7l&ms=au%2Conr&mv=m&pl=22&ei=7tLJXOCtLJ-LmLAP57-4yAw&initcwndbps=1875000&mime=audio%2Fwebm&gir=yes&clen=103520200&dur=5769.241&lmt=1554630908032174&mt=1556730512&fvip=1&keepalive=yes&c=WEB&txp=5511222&ip=86.20.78.209&ipbits=0&expire=1556752206&sparams=ip%2Cipbits%2Cexpire%2Cid%2Citag%2Csource%2Crequiressl%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cei%2Cinitcwndbps%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&signature=3C37642D78C5D3F244E0741ACF7F3CC612052994.4730C63C0076343469FD46BE2211969EF43EDA&key=yt8&ratebypass=yes'
[download] Destination: [Vinesauce] Vinny - Yoshi's Crafted World (part 2)-o_gSw92_AQM.f251.webm
[download] 100% of 98.72MiB in 00:06
[ffmpeg] Merging formats into "[Vinesauce] Vinny - Yoshi's Crafted World (part 2)-o_gSw92_AQM.mkv"
[debug] ffmpeg command line: ffmpeg -y -loglevel "repeat+info" -i "file:[Vinesauce] Vinny - Yoshi's Crafted World (part 2)-o_gSw92_AQM.f136.mp4" -i "file:[Vinesauce] Vinny - Yoshi's Crafted World (part 2)-o_gSw92_AQM.f251.webm" -c copy -map "0:v:0" -map "1:a:0" "file:[Vinesauce] Vinny - Yoshi's Crafted World (part 2)-o_gSw92_AQM.temp.mkv"
Deleting original file [Vinesauce] Vinny - Yoshi's Crafted World (part 2)-o_gSw92_AQM.f136.mp4 (pass -k to keep)
Deleting original file [Vinesauce] Vinny - Yoshi's Crafted World (part 2)-o_gSw92_AQM.f251.webm (pass -k to keep)

Description

After downloading a 720p60 YouTube video, I noticed that a 720p30 version of the video had been downloaded instead. I tried redownloading it using just -f bestvideo so that it wouldn't be merged by ffmpeg but the video was still at half the framerate.

[dstftw]

You are not downloading 60 fps with bestvideo in the first place.