[Ffmpeg-devel-irc] ffmpeg.log.20150808

[burek]

[02:08:11 CEST] <DHE> does playing with presets for libx264 affect the quality/bitrate of iframes? (I'm making an iframe-only video)
[02:18:08 CEST] <DHE> apparently not, placebo mode has no speed effect...
[10:13:17 CEST] <blue112> Hi here.
[11:22:27 CEST] <blue112> How hard is it to compile libav with MSVC ?
[14:43:03 CEST] <blue112> I've compiled libav with MSVC (--toolchain=msvc). First, I have two types of .a : libavcodec.a and libavcodec.dll.a. Which ones do I need to use when linking? Secondly, when I try to link using MSVC, I have undefined references to, for example, _av_frame_alloc. Why so ?
[15:16:58 CEST] <dongs> why does ffmpeg require kernel 2.6.wahtever.
[15:17:07 CEST] <dongs> how does a userspace app even begin to need a specific kernel version
[15:17:39 CEST] <dongs> it is exactly this kinda shit why people are no longer using linux
[15:17:56 CEST] <JEEB> > bcas.tv
[15:18:03 CEST] <JEEB> nice domain thar
[15:18:19 CEST] <dongs> it has nothign to do with TV  or ffmpeg if thats what you're wondering
[15:18:56 CEST] <JEEB> I know b-cas at least ;) did some arib b-25 related stuff at one point
[15:19:28 CEST] <dongs> right. doens't help my question tho.
[15:19:39 CEST] <JEEB> but on a more serious note, not sure if ffmpeg requires anything
[15:19:44 CEST] <dongs> it does.
[15:19:48 CEST] <dongs> ./ffmpeg
[15:19:49 CEST] <dongs> FATAL: kernel too old
[15:19:49 CEST] <JEEB> pre-built binaries might
[15:19:52 CEST] <JEEB> oh
[15:21:04 CEST] <DHE> it's actually more a glibc thing
[15:21:22 CEST] <dongs> i thought the shit was static
[15:21:35 CEST] <DHE> glibc is still built with certain features, like threading, that may be kernel-specific
[15:21:48 CEST] <dongs> kinda like the whole point, so I dont have to deal wiht idiocy of tryin to chase down lunix versions
[15:22:02 CEST] <DHE> What are you running this on anyway? 2.4 ?
[15:22:26 CEST] <dongs> sure, does it even matter? i dont see how something that reads and writes files and does some junk on them meanwhile would depend on kernel version
[15:22:27 CEST] <DHE> I have a static build of ffmpeg that has 2.6.16 as its minimum. that help?
[15:22:36 CEST] <dongs> sure
[15:22:54 CEST] <dongs> thanks ^_^
[15:22:59 CEST] <DHE> one sec...
[15:24:45 CEST] <dongs> DHE thankies
[15:25:13 CEST] <dongs> ah, only one problem 64bit
[15:25:16 CEST] <dongs> lols.
[15:25:48 CEST] <dongs> all my 64bit capable machiens have long been upgraded to windows 10
[15:26:03 CEST] <DHE> ...
[15:27:25 CEST] <anshul_> how to select program in ffplay in mpegts with muliple program
[15:27:40 CEST] <dongs> jeeb. what did you do with b25 . ffmpeg related? or what
[15:30:41 CEST] <JEEB> dongs: just played around as a hobby and had a guy relicense his shit proper oss :)
[15:30:50 CEST] <JEEB> guy = marumo
[15:31:28 CEST] <dongs> ah that guy
[15:31:30 CEST] <dongs> he's a bit of a cunt
[15:32:02 CEST] <JEEB> dunno, haven't drunk enough beer with him to know
[15:33:00 CEST] <blue112> I've compiled libav with MSVC (--toolchain=msvc). First, I have two types of .a : libavcodec.a and libavcodec.dll.a. Which ones do I need to use when linking? Secondly, when I try to link using MSVC, I have undefined references to, for example, _av_frame_alloc. Why so ? Anyone ?
[15:33:05 CEST] <dongs> what would tehre be to relicense? did he rip something from somewhere?
[15:33:14 CEST] <dongs> i thought most of his stuff was original work and he could license it as wahtever the fuck he wanted.
[15:34:05 CEST] <dongs> i dont really like his  coding style tho of that weird pseudoc++-in-c
[15:38:19 CEST] <dongs> well fuck in 20mins i wont need ffmpeg for what i was going to do anyway so i might as well just go wash dishes instead of trying to figure out how to compile this stuff
[15:38:33 CEST] <dongs> bbiab
[15:43:38 CEST] <anshul_> Does ffplay support multiprogram streams
[18:01:08 CEST] <kagami_> Hi guys. Could you please explain, is it safe to cut&concat two parts of the same video if cut ranges are not integral? Say I want to reencode 2.5 seconds of video from 00:04.5 to 00:07 in two parts, and then glue them together. What's the best variant: 00:04.5÷00:05.5 + 00:05.5÷00:07 or 00:04.5÷00:06 + 00:06÷00:07 ?
[18:05:56 CEST] <c_14> If you're reencoding it shouldn't matter.
[18:07:58 CEST] <kagami_> Is it because new frames will be created and the previous frame boundaries don't matter?
[18:08:55 CEST] <c_14> If you're reencoding, all cuts ffmpeg makes are frame-perfect. It'll create a new gop for them.
[18:09:24 CEST] <kagami_> Get it, thanks.
[21:34:54 CEST] <Pangas> Hello!
[21:35:07 CEST] <Pangas> Problem i n FFMPEG stuream.
[21:35:14 CEST] <Pangas> *in
[21:35:26 CEST] <Pangas> *stream
[21:40:26 CEST] <Pangas> Hello!
[21:43:54 CEST] <Pangas> ffmpeg: relocation error: ffmpeg: symbol av_dict_set_int, version LIBAVUTIL_54 not defined in file libavutil.so.54 with link time reference
[21:45:07 CEST] <Pangas> I'll have to recompile the library?
[21:53:17 CEST] <Pangas> Hello!
[22:15:14 CEST] <Pangas> I'am back.
[23:23:22 CEST] <kyleogrg> I'm a bit new to this.  Is this a script that will build ffmpeg for me? https://ffmpeg.zeranoe.com/blog/?p=414#more-414
[00:00:00 CEST] --- Sun Aug  9 2015