Adjust aspect ratio

[casinero]

It seems that the actual dimensions of some video files are different from how they appear on youtube, and usually the latter look more natural. For example this one, when downloaded and played using mpc-hc on Windows, it's actually like this. Therefore I try to mark the aspect ratio at container level according to what --get-format reveals, in this case "2276x2160", using ffmpeg: ffmpeg -i i.mp4 -c copy -aspect 2276:2160 o.mp4. However the result distorts another way. It becomes too "thin", like this:

Is there any other imformation I can get from youtube-dl which helps to adjust this ideally?

[phihag]

Can you post the output you get when running youtube-dl with the -v option?

As mentioned in our bug reporting guidelines, without that it's quite hard to understand what's going on here, in particular which format you did actually download.

[casinero]

youtube-dl -f bestvideo --get-format -v https://www.youtube.com/watch?v=_b-2C3KPAM0
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-f', 'bestvideo', '--get-format', '-v', 'https://ww
w.youtube.com/watch?v=_b-2C3KPAM0']
[debug] Encodings: locale cp950, fs mbcs, out cp950, pref cp950
[debug] youtube-dl version 2015.01.01
[debug] Python version 2.7.8 - Windows-7-6.1.7601-SP1
[debug] exe versions: ffmpeg N-68788-g37b35fe, ffprobe N-68788-g37b35fe
[debug] Proxy map: {}
138 - 2276x2160 (DASH video)

youtube-dl -f bestvideo -v https://www.youtube.com/watch?v=_b-2C3KPAM0
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-f', 'bestvideo', '-v', 'https://www.youtube.com/wa
tch?v=_b-2C3KPAM0']
[debug] Encodings: locale cp950, fs mbcs, out cp950, pref cp950
[debug] youtube-dl version 2015.01.01
[debug] Python version 2.7.8 - Windows-7-6.1.7601-SP1
[debug] exe versions: ffmpeg N-68788-g37b35fe, ffprobe N-68788-g37b35fe
[debug] Proxy map: {}
[youtube] _b-2C3KPAM0: Downloading webpage
[youtube] _b-2C3KPAM0: Extracting video information
[youtube] _b-2C3KPAM0: Downloading DASH manifest
[debug] Invoking downloader on 'https://r3---sn-3cu-u2xe.googlevideo.com/videopl
ayback?id=fdbfb60b728f00cd&itag=138&source=youtube&requiressl=yes&ms=au&mv=m&mm=
31&ratebypass=yes&mime=video/mp4&gir=yes&clen=44631070&lmt=1370445446849472&dur=
84.985&signature=043B3B1DF1355EF65C14DD42CE2FB410EA7A4573.31119408D2D7076E4CC5FA
F760EE6667D4968C94&fexp=900718,927622,932404,936109,9405160,941004,943917,947209
,947218,947225,948124,952302,952605,952901,955301,957103,957105,957201,959701&ke
y=dg_yt0&sver=3&mt=1420855179&upn=qbWl4z16-Lw&ip=182.235.176.159&ipbits=0&expire
=1420876830&sparams=ip,ipbits,expire,id,itag,source,requiressl,ms,mv,mm,ratebypa
ss,mime,gir,clen,lmt,dur'
[download] Destination: [A-made] 變態妍字幕版 太妍 我就是這樣的人-_b-2C3KPAM0.mp
4
[download] 100% of 42.56MiB in 00:45

[phihag]

Thank you for the report.

You are using an outdated version; the height and width of the DASH formats is incorrect since YouTube changed what they serve, this has been fixed in youtube-dl 2014.01.05.1.

youtube-dl 2015.01.10 and newer will fix up these videos automatically, but you can also pass in --fixup warn if you'd like to do that yourself. See our FAQ if you need help updating.