No playback of certain videos, infinite loading for HLS/DASH streams

[obfripper]

• I carefully read the contribution guidelines and agree to them.
• I checked if the issue/feature exists in the latest version.
• I did use the incredible bugreport to markdown converter to paste bug reports.

I am having issues playing certain videos, they all exhibit the same problem by sitting with the spinning wheel and nothing happening. If i select an external player, there is a pause followed by an error notification, which I have screencapped and says 'the location.......full screen url....cannot be played'. The fault occurs only on some resolutions, and it has been observed that in most cases the qualities 720p or 360p always work (e.g. https://youtu.be/zCGouRiflIw).

For example videos;
https://www.youtube.com/watch?v=2NT-MRkYeSo
All the recent videos on his channel exhibit the same issue.

https://www.youtube.com/watch?v=ZHeqOwV5bow
Some of the video on this channel play, some do not.

[Stypox]

Why are there both "&sig=" and "&lsig="? I think the second one makes no sense, but I could be wrong. I'll investigate

[theScrabi]

Which version are u using?

[obfripper]

0.16.2

[Stypox]

It doesn't work for me either, but only on the WebM format. Here is the url I got from the extractor (I replaced my IP with X):

https://r16---sn-nx5cvox-hpae7.googlevideo.com/videoplayback?expire=1561147001&ei=GeIMXYzZF9bugAfg15b4Dw&ip=XX.XXX.XXX.X&id=o-AG0ApOUZOJ33f4ajMQAG7YiNYK1JvEH6BYveBSSKPGHM&itag=247&aitags=133%2C134%2C135%2C136%2C160%2C242%2C243%2C244%2C247%2C278&source=yt_otf&requiressl=yes&mm=31%2C26&mn=sn-nx5cvox-hpae7%2Csn-4g5e6nlk&ms=au%2Conr&mv=m&nh=EAE%2C&pcm2cms=yes&pl=19&initcwndbps=770000&mime=video%2Fwebm&otf=1&otfp=1&dur=0.000&lmt=1561056919842256&mt=1561125283&fvip=6&keepalive=yes&c=WEB&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cmime%2Cotf%2Cotfp%2Cdur%2Clmt&lsparams=mm%2Cmn%2Cms%2Cmv%2Cnh%2Cpcm2cms%2Cpl%2Cinitcwndbps&lsig=AHylml4wRQIhAOv1OJtRCSX85JZ-myiK-KrotoD6YcSE-2KeKUqWNJsNAiBLYXkNmxGviHtuyE_YXQbGW4lkbwkkxAwZ1OmZOoFqrg%3D%3D

Decoded:

https://r16---sn-nx5cvox-hpae7.googlevideo.com/videoplayback?expire=1561147001&ei=GeIMXYzZF9bugAfg15b4Dw&ip=XX.XXX.XXX.X&id=o-AG0ApOUZOJ33f4ajMQAG7YiNYK1JvEH6BYveBSSKPGHM&itag=247&aitags=133,134,135,136,160,242,243,244,247,278&source=yt_otf&requiressl=yes&mm=31,26&mn=sn-nx5cvox-hpae7,sn-4g5e6nlk&ms=au,onr&mv=m&nh=EAE,&pcm2cms=yes&pl=19&initcwndbps=770000&mime=video/webm&otf=1&otfp=1&dur=0.000&lmt=1561056919842256&mt=1561125283&fvip=6&keepalive=yes&c=WEB&sparams=expire,ei,ip,id,aitags,source,requiressl,mime,otf,otfp,dur,lmt&lsparams=mm,mn,ms,mv,nh,pcm2cms,pl,initcwndbps&lsig=AHylml4wRQIhAOv1OJtRCSX85JZ-myiK-KrotoD6YcSE-2KeKUqWNJsNAiBLYXkNmxGviHtuyE_YXQbGW4lkbwkkxAwZ1OmZOoFqrg==

[omarroth]

Appears jdf76/plugin.video.youtube#624 fixes this by adding r'(?P<name>[a-zA-Z0-9$]+)\(', to the list of function patterns it uses.

I'd recommend changing DECYRYPTION_SIGNATURE_FUNCTION_REGEX to what Invidious uses (/^(?<name>[^=]+)=function\(a\){a=a\.split\(""\)/m) to see if it fixes the issue.

[Stypox]

I can't convert that regex to the java dialect... this is the regex I tried:

"/^([^=]+)=function\\(a\\)\\{a=a\\.split\\(\"\"\\)/m"

I removed the ?<name> part since the java parser currently matches the first group (it should give the same resoult, shouldn't it?). Also I put a \ before the {, otherwise it would have given this error: PatternSyntaxException: Error in {min,max} interval near index 25, where 25 pointed to the = in {a=. The current error I get is RegexException: failed to find pattern "/^([^=]+)=function\(a\)\{a=a\.split\(""\)/m (I don't know why " is missing at the end)

[omarroth]

Try removing the leading and trailing slashes (/, /m).

[luca233]

cannot resolve with "/^([^=]+)=function(a){a=a.split("")/m and
^([^=]+)=function(a){a=a.split("")

[theScrabi]

@TobiGr this calls for an emergency release shall i take care of release once it it fixed or will you?

[Stypox]

By using only the first part of the regex ^([^=]+)=function\(a\)\{a=a\.split\(\" against playerCode I manually found two matches:

Aq=function(a){a=a.split("&");for(var b={},c=0,d=a.length;c<d;c++){var e=a[c].split("=");if(1==e.length&&e[0]||2==e.length)try{var f=Xc(e[0]||""),k=Xc(e[1]||"");f in b?g.Ka(b[f])?ib(b[f],k):b[f]=[b[f],k]:b[f]=k}catch(m){var l=Error("Error decoding URL component");l.params="key: "+e[0]+", value: "+e[1];"q"==e[0]?g.Vp(l):g.L(l)}}return b};

Dq=function(a){a=a.split(",");return a=a.map(function(b){return g.Cq(b)})};

But both of them have something between the " ", so it can't be matched by `^([^=]+)=function(a){a=a.split(""). Using the old regex truncated before the " " I get the same result.

If I, instead, use this part of the regex \.split\(""\) I get these four lines:

jaa=function(a,b){for(var c=g.Da(a)?a.split(""):a,d=a.length-1;0<=d;--d)d in c&&b.call(void 0,c[d],d,a)};

g.Wa=function(a,b,c){for(var d=a.length,e=g.Da(a)?a.split(""):a,f=0;f<d;f++)if(f in e&&b.call(c,e[f],f,a))return f;return-1};

g.Ya=function(a,b,c){for(var d=g.Da(a)?a.split(""):a,e=a.length-1;0<=e;e--)if(e in d&&b.call(c,d[e],e,a))return e;return-1};

xi=function(a,b,c,d,e){if(null==a)return"";b=b||"&";c=c||",$";"string"==typeof c&&(c=c.split(""));if(a instanceof Array){if(d=d||0,d<c.length){for(var f=[],k=0;k<a.length;k++)f.push(xi(a[k],b,c,d+1,e));return f.join(c[d])}}else if("object"==typeof a)return e=e||0,2>e?encodeURIComponent(yi(a,b,c,d,e+1)):"...";return encodeURIComponent(String(a))};

I also tried this regex but it only works if I use the part before " ", as above.

[TobiGr]

@theScrabi That's a good question. I currently have little time due to upcoming exams. So it would be better if you take care of it. Nevertheless, we need a fix before we release something :D

[theScrabi]

I'll take care of it. @Stypox has a fix already been send to the extractor?