best[height=] downloads Video-Only DASH when height is only available in DASH...

[ghost]

As requested, here is a verbose output of a youtube 'best[height=]' option that is downloading video-only DASH. As stated before, I was able to get around it by doing '<=' instead of '='. This seems to be a script-glitch from asking it to pull a resolution that is only available in DASH.

---

youtube-dl -v -f best[height=480] https://www.youtube.com/watch?v=_PNBF_LGrfM
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-v', u'-f', u'best[height=480]', u'https://www.youtube.com/watch?v=_PNBF_LGrfM']
[debug] Encodings: locale US-ASCII, fs utf-8, out US-ASCII, pref US-ASCII
[debug] youtube-dl version 2015.04.28
[debug] Python version 2.7.8 - Darwin-8.11.0-Power_Macintosh-powerpc-32bit
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] _PNBF_LGrfM: Downloading webpage
[youtube] _PNBF_LGrfM: Extracting video information
[youtube] _PNBF_LGrfM: Downloading DASH manifest
[debug] Invoking downloader on 'https://r6---sn-qxo7sn7k.googlevideo.com/videoplayback?id=fcf34117f2c6adf3&itag=135&source=youtube&requiressl=yes&mm=31&ms=au&mv=m&pl=16&ratebypass=yes&mime=video/mp4&gir=yes&clen=27477814&lmt=1430256318389239&dur=339.714&mt=1430327681&key=dg_yt0&fexp=900720,907263,934954,938028,9406690,9407588,9407877,9408007,9408705,9408710,9408787,9409205,9409230,9412839,9413011,9413149,947233,948124,952612,952637,957201&sver=3&upn=tPFdYxEOYkM&signature=6F146691843968AD129BD05B140922A1ABD65D96.97DE5911E48E99520EE5208297519740AF696615&ip=97.115.165.13&ipbits=0&expire=1430349373&sparams=ip,ipbits,expire,id,itag,source,requiressl,mm,ms,mv,pl,ratebypass,mime,gir,clen,lmt,dur'
[download] Destination: Classic Game Room - QUICK STEP review for Atari 2600-_PNBF_LGrfM.mp4
[download] 100% of 26.20MiB in 00:34

[dstftw]

There are no exactly-480-height non-DASH videos by that link. What would you expect to happen in this case? Throwing an error that requested format is not available?

[ghost]

I know. jaimeMF asked me to post this as a new issue. They said that best[height] should not pass DASH and want to track it down.

[rg3]

Cross-referencing issue #5550

[dstftw]

@jaimeMF what do you think should we do? Throwing format not available error may break use flow of audio only extractors like soundcloud. Implementing best similarly to worst will still end up in fallback to audio/video-only formats when filter is not satisfied for audiovideo formats.

[jaimeMF]

I thought that best would only select non-DASH formats, but it doesn't (and it have never worked like that). Maybe we should do like with worst, but without falling back to DASH formats. For audio only extractors it should work as now, I have to look if it can be easily implemented.

It's just my opinion, maybe you disagree.

[jaimeMF]

I have opened a PR with the proposed change: #5554.

[dstftw]

This will be fixed in the next version. Thanks for the report.