[Ffmpeg-devel-irc] ffmpeg.log.20190504

[burek]

[00:39:20 CEST] <shibboleth> anyone know of a way to stitch video feeds from each four sides of a building together to one "panorama"?
[02:42:34 CEST] <Xenic-> can you people tell the difference between 1920x1080p video shot with $100K camera  vs  $10K  video camera?
[03:00:44 CEST] <fleabeard> hello, would anyone know how to convert a h265 mkv that has subtitles into an h264 mpg with subtitles? Everything I've tried doesn't preserve the ASS subtitles :/
[03:01:23 CEST] <fleabeard> preferrably via the CLI
[03:01:41 CEST] <pink_mist> mpg doesn't support ass subs, you'll need to burn them into the video, and ffmpeg should be able to do that just fine
[03:01:45 CEST] <pink_mist> no idea how though
[03:01:59 CEST] <fleabeard> ah, then that explains it then
[03:02:25 CEST] <pink_mist> or you can extract the ass subs into a separate file - most modern players will pick those up
[03:02:49 CEST] <fleabeard> I wonder if it's possible to just go from h265 mkv with subs to h264 mkv with subs instead of converting to mpg
[03:03:06 CEST] <pink_mist> it sure should be
[03:03:19 CEST] <pink_mist> mkv supports both subs and h264 and h265 just fine
[03:03:37 CEST] <fleabeard> nice, I'll try googling that then, thanks!
[03:33:42 CEST] <parody> it takes 2 hours to use x265 a  15 minute video;  is this normal?
[03:36:37 CEST] <pink_mist> depends on the resolution and on your cpu, but it's certainly something that sounds within the realm of feasibility
[03:38:19 CEST] <parody> 4k video  but i have i7
[03:40:52 CEST] <parody> pink_mist  youtube does it so fast
[03:41:19 CEST] <pink_mist> youtube doesn't care at all about quality
[03:41:26 CEST] <pink_mist> so they just do shitty encodes fast
[03:41:55 CEST] <pink_mist> you can probably tune the encoder to make it a lot shittier and faster too
[03:42:21 CEST] <parody> i've seen decent quality video on youtube before though
[03:42:27 CEST] <parody> it's rare though
[03:43:07 CEST] <pink_mist> it takes time for google too though
[03:43:34 CEST] <pink_mist> you usually don't see highest-quality h265 encode on their site the second a creator uploads a new video
[03:44:00 CEST] <parody> youtube uses vp9  which i heard is slower than h265
[03:44:17 CEST] <parody> but they probably uses fast/crappy setting
[03:44:24 CEST] <pink_mist> h265 is a spec, only implementations have speed
[04:50:00 CEST] <Hello71> also youtube doesn't use only one codec
[04:50:14 CEST] <Hello71> even for video
[18:25:58 CEST] <Hackerpcs> I think on the compilation guide for Ubuntu https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu, --enable-openssl should be enabled, it's pretty essential
[20:09:28 CEST] <pink_mist> Hackerpcs: that would make it a non-redistributable binary though, which might be more important
[20:10:08 CEST] <pink_mist> Hackerpcs: if ubuntu has a gnutls package, that could be used in lieu of openssl
[20:13:25 CEST] <Hackerpcs> --enable-nonfree and --enable-libfdk-aac already makes it non redistributable though
[20:13:50 CEST] <Hackerpcs> and I think the scope of the tutorial is for personal use (hence the use of the two above), not distribution
[20:14:30 CEST] <pink_mist> ah, did not know those were already enabled, yeah, then disregard me :P
[21:08:02 CEST] <znf> Hi. Can you do DASH livestreaming with ffmpeg with x264?
[21:10:23 CEST] <BtbN> If you have an http server, sure
[21:11:18 CEST] <znf> I'm currently (re)streaming to HLS, wanted to give DASH a try, but I don't have multiple sources/bitrates etc.
[21:11:48 CEST] <znf> trying to figure out how to do this for live streams, all examples I find are vod
[21:22:55 CEST] <another> znf: maybe take a look at this: https://github.com/voc/cm/blob/master/ansible/roles/relay/files/fanout/dash.py
[21:49:10 CEST] <znf> somewhat related - does anyone have any experience with HLS and Google's Shaka player?
[21:49:42 CEST] <znf> I'm loading my playlist in the demo, and it works perfectly fine, but the same playlist on my own website does not want to work, complaining that the browser is not supported :-|
[23:41:21 CEST] <zzlatev> hey guys, can you help me to convert http to hls?
[23:41:24 CEST] <zzlatev> I try with this:
[23:42:10 CEST] <zzlatev> https://pastebin.com/4G0Pab5P
[23:42:31 CEST] <zzlatev> but I get this error:
[23:42:47 CEST] <zzlatev> http://IP:PORT: Cannot assign requested address
[23:46:19 CEST] <BtbN> You're telling it to listen on an IP/Port that can't be used for whatever reason
[23:47:20 CEST] <zzlatev> wow
[23:47:44 CEST] <zzlatev> ut why?
[23:48:02 CEST] <zzlatev> How I could convert http to m3u8?
[23:51:01 CEST] <another> i don't think you need the listen option in this case
[23:57:18 CEST] <zzlatev> I will try
[00:00:00 CEST] --- Sun May  5 2019