[Ffmpeg-devel-irc] ffmpeg.log.20140314

[burek]

[00:12] <stonie_> hello all.. i have a mxf mpeg file with 8 mono audio channels... i need it in stereo.. to have channels 1 and 3 as left and right. how can i do that?
[00:18] <llogan> stonie_: probably pan=stereo:FL=FL:FR=FR
[00:19] <llogan> oh..1 and 3
[00:19] <llogan> you'll ahve to modify that example
[00:19] <llogan> pan=stereo:c0=c1:c1=c2
[00:19] <stonie_> can i define the channel numbers?
[00:20] <stonie_> ah ok thanks ill try that soon
[00:20] <llogan> see "man ffmpeg-filters" if i'm wrong.
[00:20] <stonie_> aye tyvm
[01:13] <wacomcito> hi :)
[01:14] <wacomcito> my cron daemon don't run a ffmpeg command line. no error, no warning... but if i run the script in bash works perfectly.
[01:15] <wacomcito> it's ffmpeg ungry with cron?
[01:15] <wacomcito> xDDD
[02:01] <relaxed> wacomcito: how are you running it?
[02:02] <wacomcito> fron a /bin/sh with root
[02:02] <wacomcito> and i all this script from cron
[02:02] <wacomcito> call
[02:03] <wacomcito> but don't work.
[02:03] <wacomcito> ffmpeg not launched, no error, no warnings..
[02:03] <wacomcito> command line: 02 2 * * * /usr/local/bin/ffmpeg -i /var/www/gup/gup-template/procesando/Insiduos_2.avi /dev/null 2>&1
[02:05] <wacomcito> crontab line.
[02:07] <wacomcito> syslog -> CRON[13966]: (root) CMD (/usr/local/bin/ffmpeg -i /var/www/gup/gup-template/procesando/Insiduos_2.avi /dev/null 2>&1)
[02:07] <wacomcito> no more info...
[02:07] <wacomcito> but no ffmpeg proccess.
[02:08] <wacomcito> [relaxed] any ideas
[02:08] <wacomcito> ?
[02:25] <another> wacomcito: check if /dev/null is a video file now
[02:26] <wacomcito> xDDDDDD
[02:27] <another> the way i experienced /dev/null is, you don't want to overwrite it
[02:27] <another> ah forget that
[02:28] <wacomcito> xDDD
[02:28] <wacomcito> mmm
[02:29] <wacomcito> a bulb shine over my head.!
[02:29] <wacomcito> thanks another
[02:30] <another> ? hokay.
[02:47] <wacomcito> well the problem was the space between words in filename.
[02:48] <wacomcito> i trate this with " in route file...
[02:48] <wacomcito> but not works.
[02:49] <wacomcito> may be cron sh enviroment?
[03:40] <relaxed> wacomcito: put the command in a script or use "ffmpeg -i input .... output </dev/null"
[03:42] <relaxed> because, I think, ffmpeg expects keyboard input
[04:26] <llogan> wacomcito: use -y as a global option and ffmpeg wil need -f as an output option to tell it the output format for /dev/null
[04:41] <gueb> good night
[06:14] <anshul> what is the purpose of writing movie in naming input  -i "movie=test.avi[out0]"
[06:55] <relaxed> anshul: I think it's used for ffplay
[06:57] <anshul> i am using it like this ffmpeg -f lavfi -i "movie=/home/anshul/work/Project/cc_ext/test_5sec.ts[out0+subcc]" -map v frame%08d.png -map s -c copy -f rawvideo subcc.bin
[06:58] <anshul> but i If i dont add movie i get following error [lavfi @ 0xa714d60] No such filter: '/home/anshul/work/Project/cc_ext/test_5sec.ts'
[07:00] <relaxed> are you hard subbing?
[07:02] <relaxed> "-vf movie=input" was used before -filter_complex was created. The latter allows use to use multiple inputs instead of specifying them in the filter chain, example: ffmpeg -i input1.mkv -i input2.mkv ...
[07:04] <relaxed> whereas before you used: ffmpeg -i input1.mkv -vf "movie=input2.mkv,..."
[07:06] <anshul> do you mean that movie is used when we want to specify two input
[07:07] <relaxed> yes, but -filter_complex is the recommended way now.
[07:07] <anshul> I am not trying to hard subbing.
[07:08] <anshul> ffprobe -filter_complex "movie=/home/anshul/work/Project/cc_ext/test_5sec.ts[out0+subcc]"
[07:08] <anshul> the above command does not work
[07:08] <anshul> it says Failed to set value 'movie=/home/anshul/work/Project/cc_ext/test_5sec.ts[out0+subcc]' for option 'filter_complex': Option not found
[07:09] <relaxed> explain what you're trying to do
[07:12] <anshul> http://pastebin.com/wPAy8hNz
[07:12] <anshul> Actually i was trying to find out whether the stream contain closed_caption or not
[07:13] <relaxed> try, ffprobe -show-streams input
[07:14] <anshul> Using libav I was able to do it successfully, one day nicolas made patch for me so that using ffprobe i can check whether stream contain closed caption or not
[07:14] <relaxed> er, -show_streams
[07:15] <relaxed> ffprobe and a small amount of scripting would work
[07:15] <anshul> there will be no useful output of that since closed_caption are interlaced inside the video
[07:15] <anshul> mean those subtitle are there in video streams
[07:16] <relaxed> Stream #0:1: Subtitle: cea_708  <-- closed caption subs
[07:17] <relaxed> so ffprobe or ffmpeg will show them
[07:17] <anshul> see output for same video http://pastebin.com/TKBp6W7G
[07:18] <anshul> cea_708 is shown when i use  -f lavfi -i "movie=/home/anshul/work/Project/cc_ext/test_5sec.ts[out0+subcc]"
[07:20] <anshul> My goal is to understand what i am doing, just now i am running the command given to me by nicolas
[07:20] <relaxed> what about -show_format?
[07:21] <relaxed> can you put this video up somewhere?
[07:23] <anshul> http://pastebin.com/9LU3NwdJ show_format
[07:24] <anshul> video alone might not help you, you have to also patch the latest git of yours and compile your source code
[07:26] <relaxed> humor me
[07:26] <SirCmpwn> I'm using ffmpeg to encode videos for playback in the browser
[07:26] <SirCmpwn> however, there's a weird decoding issue sometimes
[07:27] <SirCmpwn> really weird interlacing shows up, but only when the video's not in full screen (@1920x1080)
[07:27] <SirCmpwn> example: https://mediacru.sh/ZUkpscG0k5jj
[07:28] <anshul> https://docs.google.com/nonceSigner?nonce=9huu8vt278722&continue=https://doc-00-1k-docs.googleusercontent.com/docs/securesc/8j0msh0v6le2ftghplb15drolh847p6t/m016o7prufb86nguglhkjqm0o9ruh4qv/1394776800000/13387300583993136249/13387300583993136249/0B4sMK9Wz9oX3cDRHdko1eldTczQ?e%3Ddownload%26h%3D16653014193614665626&hash=jd1jf9n2v0jde7sptr9n0qsrojq36vja
[07:29] <SirCmpwn> how about a URL that doesn't need wrapping to display fully
[07:31] <anshul> https://drive.google.com/file/d/0B4sMK9Wz9oX3cDRHdko1eldTczQ/edit?usp=sharing
[07:33] <anshul> patch 1 https://drive.google.com/file/d/0B4sMK9Wz9oX3MXpNbmdSbzVKTHc/edit?usp=sharing
[07:33] <anshul> patch 2 https://drive.google.com/file/d/0B4sMK9Wz9oX3aEc3blgxd0FvNXc/edit?usp=sharing
[07:34] <anshul> relaxed, i have uploaded all three things
[07:36] <anshul> SirCmppwn I think search something similar in track, if nothing found then you should place your bug report with ffmpeg command
[07:37] <anshul> SirCmppwn, I am unable to find plugin for your media file in browser
[07:38] <anshul> Is behaviour same when you try to play that video using ffplay
[07:40] <anshul> relaxed, what is the use of out0 in input
[08:07] <relaxed> anshul: They're labels. Have you looked at http://ccextractor.sourceforge.net/ ?
[08:09] <anshul> yes, I am trying to intigrate ffmpeg in cc_extractor
[08:11] <anshul> relaxed, what is the use of labels?
[08:12] <anshul> What purpose is the out0 solving
[10:47] <benimnetz> hi everybody. i am seeking a bit of assistance in compiling ffmpeg 2.1.4 on centos 6.5
[10:50] <benimnetz> i largely followed this guide: https://trac.ffmpeg.org/wiki/CentosCompilationGuide
[10:53] <relaxed> what's the problem?
[10:54] <relaxed> benimnetz: ^^
[10:58] <benimnetz> the i only need a subset of ffmpegs function so i only --enable-opus --enable-libx264
[10:59] <benimnetz> sorry was preparing a pastebin
[10:59] <benimnetz> configure gives me ERROR: libx264 not found
[11:00] <benimnetz> here a pastebin regarding my problem: http://pastebin.com/DHE39G5p
[11:08] <axys^> is vp9 multithreaded yet ?
[11:08] <JEEB> depends on if you're talking about decoding or encoding
[11:08] <axys^> encoding
[11:08] <JEEB> no
[11:09] <JEEB> libvpx is still single-threaded with vp9 encoding
[11:09] <axys^> also while encoding the fps cosntantly drops
[11:09] <axys^> I get from 30fps to 0.1fps
[11:09] <relaxed> benimnetz: did you install libx264 git using $HORNET_PREFIX ?
[11:10] <JEEB> axys^, yes - it's slow as hell
[11:11] <spaam> still slow? =/
[11:12] <benimnetz> zes
[11:12] <benimnetz> yes i did
[11:14] <benimnetz> for example pkg-config --cflags x264 gives -I/home/bgeese2s-local/hornet_dist/include
[11:14] <relaxed> pastebin.com the bottom of config.log
[11:17] <benimnetz> http://pastebin.com/vkfUtyEZ
[11:18] <relaxed> add -ldl to ldflags
[11:18] <relaxed> --enable-fdflags"-ldl -L...."
[11:19] <benimnetz> give me second
[11:19] <relaxed> s/fdflags/ldflags/
[11:21] <benimnetz> Unknown option "--enable-ldflags" do you mean --extra-ldflags ?
[11:21] <relaxed> yes, sorry
[11:22] <benimnetz> ok cool, that seems to help!
[11:22] <relaxed> llogan: https://trac.ffmpeg.org/wiki/CentosCompilationGuide needs --extra-ldflags="-ldl ..." for libx264.
[11:23] <relaxed> oh, I see you have it as --extra-libs="-ldl"
[11:23] <axys^> I wonder if there is some active development on multithreading the vp9 encoder
[11:24] <relaxed> llogan: maybe a blurb in the x264 section mentioning --extra-libs="-ldl" is required for it.
[11:25] <JEEB> axys^, #vp8 would be the channel for that, but so far it seems like multithreading is not on their list of things to do
[11:26] <benimnetz> thanks relaxed for the fast help, in the pastebin you can see the commands i used
[11:27] <axys^> isn't youtube already streaming vp9 videos ?
[11:28] <JEEB> yes, but for them multithreading is just an extra :P Also I think only some clips get encoded as VP9
[11:28] <JEEB> also it's not streaming
[11:28] <JEEB> it's just reading already encoded data via http
[11:28] <JEEB> because VP9 definitely isn't usable for streaming purposes yet
[11:30] <axys^> hm, with all the fuss around 4k TVs I would have expected them to focus more on this aspect
[11:31] <axys^> I mean it's almost impossible to encode a 480p video, 4k is out of the question
[11:32] <JEEB> well, at least the HEVC implementations seem OK, preset placebo at 720p gives me around 0.4fps. Which is already much faster than libvpx's vp9
[11:32] <JEEB> although neither libvpx's VP9 or libx265's HEVC still have as much visual optimizations as libx264
[14:39] <theholyduck> JEEB, have they gotten aroudn to adding mulithtreading to libvpx vp9 yet?
[14:39] <theholyduck> cause the last time i tried, it hasnt
[14:40] <theholyduck> lol 14 hours to encode a 3000 frame video
[14:41] <theholyduck> means it did 3.5 frames a Minute :P
[14:41] <spaam> shit
[14:41] <spaam> that is really slow
[14:41] <spaam> when did they release vp9 ? in november+
[14:44] <ubitux> 14 hours for 3k frames
[14:44] <ubitux> that's actually pretty good
[14:44] <ubitux> it took several days for an HD encode of 5k frames last time
[14:45] <sacarasc> That is crazy.
[15:46] <onefix_work> How can I reencode an MPEG-TS stream without having audio sync problems when I get dropouts?
[15:48] <klaxa> what?
[15:51] <onefix_work> I have an MPEG-TS stream (from a TV source) that will occasionally have a garbled frame.  If I play it in realtime, I see garbage in the video sometimes, but it's always in sync.  I would like to reencode it to an MPEG4 while keeping the audio in sync...probably keep it from dropping frames
[15:53] <jarainf> onefix_work, seems like you want to ivtc the transport stream. Use -vf "fieldmatch, decimate" to do so.
[15:53] <onefix_work> OK, thanks\
[15:54] <jarainf> If there are still some interlaced frames you can try adding yadif=deint=1 between fieldmatch and decimate
[15:54] <klaxa> oh that might actually be what he means
[15:54] <klaxa> i thought something like transmission errors in the payload
[15:57] <onefix_work> right
[18:04] <albator> hello
[18:04] <albator> i m facing a strange issue.
[18:06] <albator> so I wanted to setup nginx php auth
[18:07] <albator> and it worked fine using open caster or flash media encoder
[18:07] <albator> when I put the same string in the rtmp url , but using ffmpeg
[18:07] <albator> it basically shutdown the whole server
[18:07] <albator> ffmpeg -i file -c copy - f flv rtmp-server/path&user=xx&pass=xxx
[18:08] <albator> without the auth & , no issue ofc
[18:18] <Wzee> Hello, I'm hoping someone is able to fill me in on how I can demux a live sliding .m3u8. Starting from the first segment inside the playlist? I've tried ffmpeg -ss 0 -i http://localhost:8888/master.m3u8 -ss 0 -f image2 -vsync 0 path/%02d.jpg
[18:32] <llogan> relaxed: feel free to add it. unfortunately i've been neglecting that particular guide lately.
[22:01] <albator> absolutely no hint on my issue? :(
[22:49] <relaxed> albator: no, but did you single quote the url?
[22:50] <albator> nop
[22:50] <relaxed> llogan: NO U
[23:16] <albator> works with " " yes
[23:16] <relaxed> my work here is done
[23:40] <relaxed> llogan: done
[23:52] <llogan> relaxed: thanks. i made it into a "fancy note". maybe i'll do the same for the rest of the libraries sometime and de-noteize them.
[00:00] --- Sat Mar 15 2014