[ZDF] add support for multiple audio tracks

[Vittelius]

---

• I've verified and I assure that I'm running youtube-dl 2018.04.16

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

---

zdf.de provides the BBC's Hard Sun with both the German dub and the original English audio. An mp4 of this program downloaded with youtube.dl however only includes the English track. Would it be possible to have both audio tracks in the end?
Here is the link: https://www.zdf.de/serien/hardsun/hard-sun-1-100.html (For legal reasons the video is both geo-resricted and only available after 10pm).

[dstftw]

-F, -f format_code.

[tobsen]

youtube-dl -F https://www.zdf.de/serien/greyzone/zugriff-100.html
[ZDF] zugriff-100: Downloading webpage
[ZDF] zugriff-100: Downloading JSON content
[ZDF] zugriff-100: Downloading JSON metadata
[ZDF] zugriff-100: Downloading m3u8 information
[ZDF] zugriff-100: Downloading m3u8 information
[ZDF] zugriff-100: Downloading m3u8 information
[ZDF] zugriff-100: Downloading m3u8 information
[ZDF] zugriff-100: Downloading f4m manifest
[ZDF] zugriff-100: Downloading f4m manifest
[info] Available formats for zugriff-100:
format code                              extension  resolution note
hls-aac-Originalton-0                    mp4        audio only [dan] 
hls-aac-Originalton-1                    mp4        audio only [dan] 
hls-aac-Originalton-2                    mp4        audio only [dan] 
hls-aac-Originalton-3                    mp4        audio only [dan] 
hls-aac-TV_Ton-0                         mp4        audio only [deu] 
hls-aac-TV_Ton-1                         mp4        audio only [deu] 
hls-aac-TV_Ton-2                         mp4        audio only [deu] 
hls-aac-TV_Ton-3                         mp4        audio only [deu] 
hls-96-0                                 mp4        audio only   96k , mp4a.40.2
hls-96-1                                 mp4        audio only   96k , mp4a.40.2
hls-96-2                                 mp4        audio only   96k , mp4a.40.2
hls-96-3                                 mp4        audio only   96k , mp4a.40.2
hls-377-0                                mp4        480x272     377k , avc1.77.30, video only
hls-377-1                                mp4        480x272     377k , avc1.77.30, video only
hls-377-2                                mp4        480x272     377k , avc1.77.30, video only
hls-377-3                                mp4        480x272     377k , avc1.77.30, video only
hls-608-0                                mp4        640x360     608k , avc1.77.30, video only
hls-608-1                                mp4        640x360     608k , avc1.77.30, video only
hls-608-2                                mp4        640x360     608k , avc1.77.30, video only
hls-608-3                                mp4        640x360     608k , avc1.77.30, video only
hls-608-4                                mp4        640x360     608k , avc1.77.30, video only
hls-608-5                                mp4        640x360     608k , avc1.77.30, video only
hls-608-6                                mp4        640x360     608k , avc1.77.30, video only
hls-608-7                                mp4        640x360     608k , avc1.77.30, video only
hls-1171-0                               mp4        852x480    1171k , avc1.77.30, video only
hls-1171-1                               mp4        852x480    1171k , avc1.77.30, video only
hls-1171-2                               mp4        852x480    1171k , avc1.77.30, video only
hls-1171-3                               mp4        852x480    1171k , avc1.77.30, video only
hls-1812-0                               mp4        1024x576   1812k , avc1.77.30, video only
hls-1812-1                               mp4        1024x576   1812k , avc1.77.30, video only
hls-2597-0                               mp4        1280x720   2597k , avc1.640028, video only
hls-2597-1                               mp4        1280x720   2597k , avc1.640028, video only
http-h264_aac_mp4_http_na_na-low-0       mp4        unknown    [deu] low 
http-h264_aac_mp4_http_na_na-low-1       mp4        unknown    [dan] low 
http-h264_aac_mp4_http_na_na-high-0      mp4        unknown    [deu] high 
http-h264_aac_mp4_http_na_na-high-1      mp4        unknown    [dan] high 
http-h264_aac_mp4_http_na_na-high-2      mp4        unknown    [deu] high 
http-h264_aac_mp4_http_na_na-high-3      mp4        unknown    [dan] high 
http-h264_aac_mp4_http_na_na-veryhigh-0  mp4        unknown    [deu] veryhigh 
http-h264_aac_mp4_http_na_na-veryhigh-1  mp4        unknown    [dan] veryhigh 
http-h264_aac_mp4_http_na_na-veryhigh-2  mp4        unknown    [deu] veryhigh 
http-h264_aac_mp4_http_na_na-veryhigh-3  mp4        unknown    [dan] veryhigh 
hds-377-0                                flv        unknown     377k 
hds-377-1                                flv        unknown     377k 
hds-608                                  flv        unknown     608k 
hds-1171                                 flv        unknown    1171k 
hds-1812                                 flv        unknown    1812k 
hds-2597                                 flv        unknown    2597k  (best)

I have the same problem, I tried to get best German audio [deu].
I read https://github.com/rg3/youtube-dl#format-selection
But in the output table the language is listed in note column and the reference lists no way to parse note. I tried bestvideo+bestaudio/best[note*=deu], but it does not work.