plugin development - allow to specify referrer in ContentURLContainer

[Programmer]

ContentURLContainer which is used for actual media download allows to specify user-agent but not the referrer, which is required for some sites like http://www.radiotunes.com/ or http://www.di.fm/ Example of media URL: http://pub8.di.fm:80/di_vocaltrance_aacplus Referrer needed: http://www.di.fm Example batch file for ffmeg (note that batch is looking weird because of the difficulty to use \n as part of ffmpeg http header parameter)

---

setlocal EnableDelayedExpansion Set LF=^

for /f %%a in ('copy /z "%~f0" nul') do set "CR=%%a" set VIDEOURL=http://pub8.di.fm:80/di_vocaltrance_aacplus set REFERER=http://www.di.fm ffmpeg.exe -hide_banner -headers "Referer: %REFERER%!CR!!LF!" -user-agent "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.97 Safari/537.36" -i "%VIDEOURL%" -y -b:a 320k -id3v2_version 3 -ac 1 -f mp3 out.mp3

[Programmer]

Example ffmpeg batch file is attached

[Petr Nejedly]

it seems it's a pain to pass headers to ffmpeg currently, especially on Windows, as we need to add CRLF after each header.

Postponing this until FFmpeg makes it easier.

[Kyan Beau]

This issue recently became a problem for me when one of my regularly watched online streams suddenly started requiring the Referer header. I was able to get ffmpeg to process it correctly by issuing the following command:

ffmpeg.exe -headers "Referer: http://www.adintrend.com/hd/live/iframe.php?ch=33&sid=aqr8acd73bbabf7cb6fc5f72dac2418dc2b&tmpx=" -i "http://a1.adintrend.com:443/live/ch33/i/ch33i.m3u8"

The stream is from the following web page: http://www.adintrend.com/hd/ch33.

I'm hoping that this information might be helpful to patch Serviio so it can work around this issue.

My ffmpeg version is ffmpeg-20170111-e71b811-win64-static.