[Ffmpeg-devel-irc] ffmpeg.log.20150518

[burek]

[00:31:09 CEST] <Antony> Hello
[00:31:10 CEST] <Antony> I have an error when compiling ffmpeg
[00:31:43 CEST] <Antony> this the error: gcc is unable to create an executable file.
[00:31:43 CEST] <Antony> If gcc is a cross-compiler, use the --enable-cross-compile option.
[00:31:44 CEST] <Antony> Only do this if you know what cross compiling means.
[00:31:44 CEST] <Antony> C compiler test failed
[00:32:37 CEST] <Antony> https://www.filepicker.io/api/file/4Z61EL0BTaqPhT2OBDsR
[00:32:48 CEST] Action: DragonsLord is away: AWAY
[00:33:00 CEST] <Antony> that's my config.log
[00:33:51 CEST] <Antony> Can someone help me out?
[00:54:29 CEST] <c_14> Antony: get rid of --extra-libs and everything in it
[00:57:56 CEST] <Antony> if I remove those lines.
[00:57:56 CEST] <Antony> I get the following error:
[00:57:56 CEST] <Antony> ERROR: gnutls not found
[00:58:12 CEST] <c_14> Do you have gnutls installed?
[00:58:47 CEST] <Antony> yes
[00:59:13 CEST] <c_14> config.log when it doesn't find gnutls?
[00:59:24 CEST] <Antony> gnutls-2.8.5-14.el6_5.x86_64
[01:01:18 CEST] <Antony> https://www.filepicker.io/api/file/YyWW7HkXTnWhL7D75hUk
[01:01:18 CEST] <Antony>  https://www.filepicker.io/api/file/VdFRu3eTFuPRFd1yL3ql
[01:02:31 CEST] <c_14> What does `pkg-config --exists --print-errors' return?
[01:05:44 CEST] <Antony> root at h2 ~]# pkg-config --exists --print-errors
[01:05:44 CEST] <Antony> Must specify package names on the command line
[01:05:55 CEST] <c_14> eh
[01:06:01 CEST] <c_14> What does `pkg-config --exists --print-errors gnutls' return?
[01:06:02 CEST] <c_14> derp
[01:06:49 CEST] <Antony> pkg-config --exists --print-errors gnutls
[01:06:49 CEST] <Antony> Package gnutls was not found in the pkg-config search path.
[01:06:49 CEST] <Antony> Perhaps you should add the directory containing `gnutls.pc'
[01:06:49 CEST] <Antony> to the PKG_CONFIG_PATH environment variable
[01:06:49 CEST] <Antony> No package 'gnutls' found
[01:08:37 CEST] <c_14> Where is gnutls installed?
[01:11:02 CEST] <Antony> Installed:
[01:11:03 CEST] <Antony>    gnutls.x86_64 0: 2.8.5-14.el6_5
[01:11:24 CEST] <c_14> You probably need gnutls-dev or something.
[01:18:23 CEST] <Antony> I've installed from yum as manually compiled
[01:25:49 CEST] <Antony> I just installed gnutls-devel.x86_64
[01:26:22 CEST] <Antony> Now I get a new error:
[01:26:22 CEST] <Antony> ERROR: libass not found
[01:27:12 CEST] <c_14> Once more, from the top.
[01:29:58 CEST] <Antony> OK, installing libraries hehe
[02:04:08 CEST] <Antony> I have compiled thanks c_14
[02:07:43 CEST] <Antony> Now I have errors in sending the command make
[02:09:35 CEST] <Antony> but here I go solving.. ;)
[04:48:10 CEST] <artwait> Hi there. I'm doing live video capture via ffmpeg (from v4l2) and need to get the wall time for the first frame written to disk. Wondering if anyone knows how I might do that. Tx!
[04:48:50 CEST] <artwait> (I've also posted the above query to the user email list--apologies if this is viewed as cross-posting)
[05:01:13 CEST] <c_14> Where do you want the time?
[06:21:12 CEST] <artwait> Where do I want the time written? I'm flexible--if it could go in the container as metadata, that would be great. But even if it was written to a separate file, I'd be happy.
[06:22:23 CEST] <c_14> I could get it burned into the first frame. Technically it should also be possible to write it into metadata, but I can't get it to work for mkv and for mp4 it thinks it's 2036.
[06:27:00 CEST] <artwait> I'm using mkv. Burning it into the frame would be fantastic!
[06:27:22 CEST] <artwait> Is this a code change, or is it something we can do with an existing ffmpeg build?
[07:27:44 CEST] <Ore5ama> hello
[07:28:05 CEST] <Ore5ama> I want to encode video to x265 using ffmpeg in linux. How do i do it?
[07:34:11 CEST] <JEEBsv> nothing special needed for that; compile or see if your distro packages FFmpeg with libx265 linked in
[07:36:19 CEST] <Ore5ama> i have installed ffmpeg already
[07:36:35 CEST] <Ore5ama> but when i try to encode it says: Unrecognized option 'x265-params'.
[07:46:49 CEST] <c_14> artwait: drawtext filter, with strftime text expansion, and an expression that only evaluates true for however many frames you want it displayed
[08:14:02 CEST] <artwait> c_14: cool, looks like something like that might work. I'll check it out. Thanks!!!
[10:51:31 CEST] <krasnayarsk> Hi all. I have the following oneliner that works: "ffmpeg -f alsa -ac 2 -i default -itsoffset 00:00:00.5 -f x11grab -r 25 -s 1366x768 -i :0.0 -vcodec libx264 -preset ultrafast -crf 0 screencast-02.mkv". But the size of the mkv is rather large; about 15 MB for a 10 second video. Is there a tweak to reduce the output size? I've tried replacing ".mkv" with ".avi". I know avi as got smaller size files beca
[10:51:37 CEST] <krasnayarsk> use I used libav before. Anyone any ideas?
[10:51:56 CEST] <krasnayarsk> ffmpeg -f alsa -ac 2 -i default -itsoffset 00:00:00.5 -f x11grab -r 25 -s 1366x768 -i :0.0 -vcodec libx264 -preset ultrafast -crf 0 screencast-02.mkv
[10:53:57 CEST] <c_14> If you want lossless H.264 use -qp 0 instead of -crf 0. Also, the only way to decrease the size of lossless H.264 is to pick a slower preset (or decrease the resolution/fps).
[10:54:42 CEST] <c_14> Or change the pixel format to yuv420 (if it defaults to yuv444)
[10:56:20 CEST] <c_14> You could also decrease the audio bitrate (though that won't do much at this point).
[11:28:48 CEST] <krasnayarsk> c_14: Thank you. That's some good pointers to look in to.
[11:42:06 CEST] <krasnayarsk> c_14: Thanks. That was usefull. Helped reduce the size considerably. Now its about 6MB for an even longer video :-)
[11:58:06 CEST] <antonva> A
[11:58:12 CEST] <antonva> Whoops.
[14:52:45 CEST] <relaxed> I compiled ffmpeg with libx265 high bit depth support but "ffmpeg -h encoder=libx265" doesn't list any supported pixel formats, which is odd.
[14:52:50 CEST] <aftab> Hello, is ffmpeg supported on windows 7 with xampp and on php 5.6 ?
[14:53:58 CEST] <JEEBsv> that's not exactly related to ffmpeg :P
[14:54:27 CEST] <JEEBsv> you should poke the developers of whatever wrapper you're using
[14:57:25 CEST] <aftab> Hello, I am trying to install ffmpeg with xampp on windows 7, i have downloaded ffmpeg_new and copied php_ffmpeg.dll in ext directory and also the other 2 dll files in windows\system32 directory but it is not loading. Whenever I run php it gives me this error: Unable to load dynamic link library 'D:\xampp\php\ext\php_ffmpeg.dll' - The specified procedure could not be found.
[15:00:15 CEST] <captain-codec> Hi ! I want to learn ffmpeg. So I am trying to  stream  a mkv file with a video codec h264 and audio codec aac. I want to transcode it into a mpegts (h264,aac) file and stream it via udp multicast. But I still have pixel errors / laggs artifacts when i try to watch it. My switches have all igmp snooping enabled.
[15:00:30 CEST] <captain-codec> This is my last command i tried "ffmpeg -re -i input.mkv -vcodec libx264 -acodec aac -strict -2 -crf 18 -preset faster -f mpegts udp://224.10.50.10:5004?pkt_size=1300"
[15:01:11 CEST] <captain-codec> thats my cpu Intel(R) Core(TM) i7-4600M CPU @ 2.90GHz
[15:01:39 CEST] <captain-codec> Do I miss something in my configuration?
[15:01:45 CEST] <relaxed> did you try removing -re ?
[15:02:13 CEST] <captain-codec> Hm not today. Last time I removed -re the stream was too fast
[15:02:39 CEST] <relaxed> ok
[15:05:22 CEST] <aftab^> Hello, I am trying to install ffmpeg with xampp on windows 7, i have downloaded ffmpeg_new and copied php_ffmpeg.dll in ext directory and also the other 2 dll files in windows\system32 directory but it is not loading. Whenever I run php it gives me this error: Unable to load dynamic link library 'D:\xampp\php\ext\php_ffmpeg.dll' - The specified procedure could not be found.
[15:08:47 CEST] <captain-codec> relaxed, Well I am going to try it again and report you
[15:08:49 CEST] <captain-codec> brb
[15:23:09 CEST] <captain-codec> So, without -re the movie wasn't played too fast but I still got wrong pixels, artifacts , lagg
[15:24:20 CEST] <captain-codec> I don't want to reduce quality. I want to stream it in  1920 × 1080
[15:31:37 CEST] <relaxed> captain-codec: try tcp://
[15:32:59 CEST] <captain-codec> why tcp? I dont think that my udp packets get lost in my test area. I cant find drops on my interfaces
[15:34:08 CEST] <relaxed> well, does the quality issue happen if you encode to a local file? If not, then it's while streaming.
[15:35:53 CEST] <relaxed> or maybe the player
[15:36:09 CEST] <captain-codec> I didn't mention that I use iptv-boxes whioch receive the multicast stream
[15:40:13 CEST] <captain-codec> I think I should give ffmpeg a fix bitrate so the iptv boxes doesnt get too many packets like a ddos attack
[15:42:46 CEST] <relaxed> captain-codec: did you see https://trac.ffmpeg.org/wiki/Encode/H.264  ?
[15:45:11 CEST] <captain-codec> Yes I did
[15:46:30 CEST] <captain-codec> But I wasn't successfull either when I tried it with maxrate and bufsize etc...
[15:48:32 CEST] <captain-codec> whats a good preset mode for udp multicast?
[15:49:29 CEST] <relaxed> try -preset veryfast -tune zerolatency
[15:53:55 CEST] <relaxed> I would figure out what the iptv-boxes can take and then craft a command
[15:56:31 CEST] <captain-codec> I will report you if I find something out
[15:56:35 CEST] <captain-codec> thx
[15:56:36 CEST] <captain-codec> cu
[19:18:48 CEST] <grublet> how can i make ffplay show a log spectrum instead of a linear spectrum
[19:52:57 CEST] <seasc> Heyas, how do i add an image to a videofile, so its shown in the filebrowser or the video properties?
[19:53:55 CEST] <seasc> Or is that done by a 'container(-specific)' tool, like mkvpropedit?
[19:55:27 CEST] <seasc> i'd prefer to use ffmpeg directly though
[22:04:10 CEST] <ezi> hi, I'm not using ffmpeg but avconv but that channel was empty. I have an avconv on an ubuntu that has the tee format ...but another one that doesnt (according to avconv -formats). Both are 'avconv version 9.18-6:9.18-0ubuntu0.14.04.1, Copyright (c) 2000-2014 the Libav developers built on Mar 16 2015 13:19:10 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
[22:04:15 CEST] <ezi> '
[22:04:23 CEST] <ezi> exactely the same version it seems
[22:04:44 CEST] <ezi> Is there some packet I'm missing ? I've just installed with apt-get ...
[22:13:51 CEST] <JEEBsv> avconv comes from #libav
[22:14:07 CEST] <JEEBsv> also I don't get your question
[22:19:19 CEST] <ezi> why one of the installations have tee , and the other dont...
[22:19:26 CEST] <ezi> Both are installed from ubuntu repository
[22:19:31 CEST] <ezi> the same repository
[22:24:00 CEST] <codehero> does anyone here use ffmpeg for streaming?
[23:38:16 CEST] <squeegily> I have an MJPG HTTP stream. I currently have 'curl $url | ffmpeg -i - -pix_fmt rgb24 -f mpegts | mpv - --quiet' but mpegts does not support rgb24
[23:38:35 CEST] <squeegily> What is the simplest output format that supports rgb24 raw video?
[23:38:50 CEST] <squeegily> -f rawvideo isn't quite what I need since MPV doesn't know the resolution
[00:00:00 CEST] --- Tue May 19 2015