Em sáb., 16 de abr. de 2022 às 19:45, Bo Berglund <bo.bergl...@gmail.com> escreveu:
> On Sat, 16 Apr 2022 15:04:02 +0200, Reino Wijnsma <rwijn...@xs4all.nl> > wrote: > > >...you can see that the m3u8-url for the HLS manifest is only valid for 2 > minutes (1650113048 - 1650112928 = 120). > >The m3u8-url for the individual videostreams on the other hand is valid > for 24 hours (1650113048 - 1650199328 = 86400 / 60 / 60 = 24). > > I just found this out with the help of my cron job trying to deduce the > lifetime > of the m3u8 retrieved via Firefox interaction. Turns out I had to wait > almost 24 > hours since I created the URL in Firefox before the alarm triggered. > > As you say it seems to live for 24 hours. > In this URL: > > https://nbcnews3.akamaized.net/hls/live/723429/NBCNewsNowa418c506/clear/hdntl=exp=1650232874~acl=%2f*~data=hdntl~hmac=2f327aa18ebec99f42654f1f6018ef74e98f12ba085743535ca3d6fb6677c7aa/VIDEO_1_4596000.m3u8 > > One can see an item 'exp=1650232874', where the number seems to be seconds > since > 1970. That is the base of timekeeping on Linux, right? > > date +%s gives the seconds since the 1970. > > And when I extract an M3U8 URL in Firefox at a certain time and subtract > the > value given by the cmd 'date +%s' it returns 86400 +/- change, so the URL > lifetime is in fact 24 hours. > > I tried to manually enter a new bigger value for the exp= item to see if it > could be extended to 48 hours but it did not work... > It returned an error when used with ffmpeg. I don’t know how much you know about tokenized URLs but you couldn’t create a valid token just increasing the expire time because it need to match the HMAC hash param. That hash is calculated using all parameters plus a secret only known by the broadcaster. > -- — Micael Silva @micaelsilva <http://twitter.com/micaelsilva> (19) 99738-9172 _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
