[00:00] <maep> durandal11707: where is it reported? i've found nothing in avformat.h [00:00] <maep> but maybe i've missed it [02:42] <p4plus2> so lately I have been having problems with ffmpeg not running up to par and I am pretty sure it has to do with the way it was configured [02:42] <p4plus2> http://www.p4plus2.pastebay.net/1234580 Here are the differences present between the two builds, would anybody have a guess as to which option is causing the second build to cap at 12FPS when recording vs 30+ I get with the manual build? [02:43] <p4plus2> off hand I don't see what would cause such a large difference, I suppose it is also worth mentioning that my CPU usage only goes up to about 14% with the system version (about 19% using my build) [02:43] <p4plus2> so its not a hardware limitation... [02:49] <p4plus2> http://www.p4plus2.pastebay.net/1234589 <-- debug output on good [02:49] <p4plus2> http://www.p4plus2.pastebay.net/1234590 <--debug output on bad [02:49] <p4plus2> if thats of any help [02:51] <llogan> the bad doesn't have --enable-x11grab, yet it can grab from x11? [02:52] <p4plus2> yeah, and it does say its using x11-grab [02:52] <llogan> why --disable-runtime-cpudetect ? [02:52] <p4plus2> thats left over from the last build, but it made no difference whether it was there or not [02:53] <p4plus2> though I will add that use flag back for the next build [02:53] <p4plus2> it doesn't hurt for sure [02:56] <p4plus2> [x11grab @ 0x13b8080] Estimating duration from bitrate, this may be inaccurate [02:56] <p4plus2> this is the only major difference I notice on the debug output from the good file vs bad (it is present in the good one) [02:57] <llogan> good uses 12 threads and bad uses 8 [02:58] <llogan> oh, you declared 8 threads, so your commands aren't the same [02:58] <p4plus2> whoops sorry, though I just tested it [02:58] <llogan> "-threads 0" is default, so you don't need to include that anyway. [02:58] <p4plus2> forcing 12 threads on the other has no effect [02:58] <p4plus2> oh okay, didn't know that [03:00] <llogan> your configure is quite long. i just --enable-gpl --enable-a few external encoders and whatever extra license junk they need. also x11grab. [03:01] <p4plus2> well its built via portage which is the gentoo package manager -- so it explicitly manipulates a lot of flags [03:01] <p4plus2> I tried replicating the builds fairly closely [03:02] <p4plus2> on the "good version" I can even take the preset to slow and maintain 30FPS perfectly fine [03:02] <llogan> i don't know. you'll just have to try a process of elimination [03:03] <p4plus2> thats kinda what I've been doing, though I guess I should keep going until I find a solution [03:03] <llogan> also your "good" is using release 1.2 and bad is using recent from git. [03:03] <llogan> you said both were from git [03:04] <llogan> oh, maybw you didn't [03:04] <p4plus2> whoops on that last test I didn't fast forward all the way to the most recent build [03:04] <p4plus2> though the problem as been persistance since ever version past 0.10.3 [03:05] <p4plus2> every* [03:05] <p4plus2> repulling to the current ffmpeg for mybuild [03:06] <llogan> if current is slower, and if you don't think it's a configure issue, then see if it is a regression [03:08] <p4plus2> I think its some configuration issue still, but I have no idea what. As my manual builds only differ by two (completely unrelated) patches and configuration [03:08] <relaxed> p4plus2: portage has been known to butcher ffmpeg installs. Try installing locally by hand. [03:09] <llogan> relaxed: did you get a chance to review the ubuntu local install guide? [03:10] <llogan> looks like some user(s) modified it already [03:10] <relaxed> Yeah, it looked good. I don't use ubuntu but that shouldn't matter. [03:10] <relaxed> IS it linked on the main wiki page? [03:10] <p4plus2> relaxed: that seems to be what I am experiencing, I was just trying to get more to the root of the problem [03:10] <p4plus2> I suppose I should try and file a bug report with gentoo and see if something can be done about whatever breaks ffmpeg on gentoo [03:13] <relaxed> llogan: Really, people should be following that guide instead of uninstalling libav*, making system packages, etc... [03:14] <llogan> relaxed: yes. and it replaced the old system install style. [03:14] <llogan> although i'm ok with users uninstalling libav. [03:15] <llogan> i've yet to overcome my laziness to update the older guides. [03:16] <relaxed> llogan: Well, I say it's wrong to have them uninstall libav because there's tons of software compiled against it. [03:16] <relaxed> In Ubuntu and Debian. [03:17] <relaxed> Replacing libav with ffmpeg in that case could break those apps. [03:17] <llogan> don't worry, the guide doesn't have them uninstall that junk. I'm just being an ass like usual. [03:17] <relaxed> Oh, I thought it did. [03:19] <relaxed> oh, libav-tools is just avconv, avplay, etc... Nevermind. [03:19] <llogan> it doesn't touch that either. [03:20] <relaxed> One of the guides says to remove it. [03:20] <llogan> you're looking at one of the old ones that i didn't change yet. [03:20] <relaxed> Is this local install guide? https://ffmpeg.org/trac/ffmpeg/wiki/CentosCompilationGuide [03:20] <llogan> https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide [03:20] <llogan> ah, centos. that one is next. [03:21] <relaxed> One guide to rule them all. [03:22] <llogan> that would be nice for me, but some users really need a step-by-step catered for their distro [03:23] <llogan> "apt-get isn't working for me on my centos. i like ponies." [03:23] <relaxed> On the latest ubuntu guide you have them installing libfaac-dev and compiling fdk-aac. Why not drop the former? [03:23] <relaxed> I meant, "One local install guide to rule them all." [03:24] <llogan> yes, that's what i figured [03:25] <relaxed> You could have distro specific blurbs in it. [03:25] <llogan> but then they'll ask "how do i install x package?" unless you make them compile all deps/external libraries [03:25] <llogan> yeah. it becomes a quesiton of formatting it well. i'll try to think on that. [03:27] <relaxed> Maybe have cross-compiling and static build info on the same page. [03:29] <llogan> i removed libfaac [03:31] <llogan> do you have a recommendation for the man pages? [03:32] <relaxed> The "Install FFmpeg" link on https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide#FFmpeg takes you to the same page. (does nothing) [03:34] <relaxed> I think the "\" breaking up long apt-get commands is fine but the "&& \" on installing from git should be removed. [03:37] <relaxed> For the local installs I have a bash script that will convert man pages to text files. That might be better than modifying MANPATH and such. [03:41] <llogan> those && were annoying me. i'll remove them and fix that link. i didn't want to touch manpath, but think some html files are generated, IIRC. [03:43] <relaxed> http://pastie.org/7955861 [03:43] <relaxed> Er, that's for pdf. Hold on. [03:45] <relaxed> http://pastie.org/7955871 [03:46] <llogan> thanks for that and the proofing. [03:50] <relaxed> You're welcome. [06:41] <mjsmith> I'm trying to use x11grab on a really low powered machine (dual core atom). anyone know how to squeeze out more performance, any cuda or opencl options available? [09:08] <igm> What is the recomended blur filter to use with ffmpeg before downscaling 4k to 1080 [09:13] <thetruthisoutthe> 0 [09:14] <thetruthisoutthe> for downscaling you use interpolation, not blur [09:15] <igm> hrmm [09:16] <igm> is lanczos the best to use for that? im reading through all the different flags for the swscaler, there seem to be quite a few possibilities [09:20] <Keshl> I think it's subjective. Personally I'd go with Lanczos, oÉo. [09:21] <igm> I shot a video at 4k in extreme low light, so there's quite a bit of noise in the video, now i'm trying to downscale it to 1080 using the extra pixels to try to reduce noise.. [09:21] <Keshl> Interesting idea. [09:21] <igm> not sure the best way to do that.. experimenting time :p [09:21] <Keshl> Yeah, try them and see what works. [09:21] <Keshl> Just to make it more interesting, you might wanna even try upscaling to 16k with a blur filter and then downscaling that using /no/ filter to 1080p. [09:22] <thetruthisoutthe> noise removal filter may help before reducing resolution [09:22] <igm> heh [09:22] <thetruthisoutthe> assuming you want it compressed in h264 [09:23] <igm> yea i do, src is h264 as well [09:23] <igm> (45 megabit from a gopro) [09:24] <Keshl> o.O' [09:24] <thetruthisoutthe> so there are many options for noise removal, and you can play with the settings [09:24] <Keshl> Wtf, gopro records 4k? [09:24] <igm> Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p, 3840x2160 [SAR 1:1 DAR 16:9], 44961 kb [09:24] <thetruthisoutthe> you have libx264 enabled ? [09:24] <igm> yes [09:30] <igm> use hqdn3d? [09:32] <thetruthisoutthe> take your time, nobody knows how will it look like [09:33] <igm> lol [09:34] <thetruthisoutthe> grab a scene from your vid, and test them on it, conversion will be much faster... [09:34] <igm> ive been running it on the first few seconds then pressing q to stop and seeing what the output looks like [09:35] <thetruthisoutthe> you can also write a script and generate all variations you want to test, and go make dinner [09:35] <igm> heh true that [09:39] <relaxed> igm: use ffmpeg -i input -t $time_in_seconds ... [09:39] <igm> thanks [09:39] <relaxed> look at `ffmpeg -filters` and man ffmpeg-filters [09:44] <lmarcetic> hey. so i recorded something on my DVB-T in a "PS" format, and I got several MPG files of up to about 900MB, and a few KiB big INFO.DVR file. What is it, and how do I concatenate the video files? [09:50] <igm> how does one increase the frame rate, say from 14.99 to 60 and speed up the video 4x without dup frames [09:51] <lmarcetic> 15*4 = 60. One in a hundred will have to be a dup though. [09:51] <lmarcetic> (since it's 14.99, not 15) [09:52] <igm> thats fine.. i'm getting more like half dup instead though [09:52] <lmarcetic> ungh, i'm a noob. i just did the math, sorry [09:52] <igm> :p [09:52] <igm> i may have it figured.. [09:53] <lmarcetic> oh? [09:53] <igm> or not [09:53] <lmarcetic> oh. [09:53] <igm> trying to use "setpts=0.25*PTS" [09:53] <lmarcetic> also, it's 1 in 1500 [09:55] <relaxed> lmarcetic: ffmpeg -i concat:1.mpg\|2.mpg\|3.mpg -c copy -f vob output.mpg [09:56] <lmarcetic> relaxed, thanks mate [10:00] <igm> seems everything ive tried is duplicating frames to maintain playback speed, when i want it to maintain frames and increase playbackspeed [10:04] <igm> hrmm i may have to use imagepipe [10:04] <igm> bah [10:09] <igm> waaa that eats alot of ram :p [10:09] <igm> 967+212 MB [10:56] <luc4> Hi! I have a video which, when opened using vlc for instance, opens with the wrong aspect ration. I mean it seems to actually be 16:9, but it opens up as it was something near 4:3. Maybe there is something wrong with some metadata? Can I fix this with ffmpeg? [11:00] <igm> hmm so with or without hqdn3d, the first frame of each video is exactly the same.. [11:09] <igm> http://pastebin.com/T8SFFTAg [11:09] <igm> am i calling the hqnd3d correctly? [11:14] <xlinkz0> damn libtheora is so slow :( [11:14] <xlinkz0> doesn't even use all cores [11:34] <relaxed> xlinkz0: why use it at all? [12:26] <xlinkz0> relaxed: firefox on linux doesn't support h264 inside html5 video [12:29] <relaxed> xlinkz0: doesn't firefox support webm? [12:30] <xlinkz0> idk some colleague of mine told me it doesn't work out of the box [12:30] <xlinkz0> doesn't work on mac either, inside firefox [12:30] <xlinkz0> i think we'll just go with flash [12:31] <relaxed> I find that hard to believe. [12:31] <relaxed> https://developer.mozilla.org/en-US/docs/HTML/Supported_media_formats [12:33] <xlinkz0> well still we'd have to practically double our storage usage [12:33] <xlinkz0> just for mac and linux [12:33] <xlinkz0> making webm videos [12:34] <xlinkz0> idk if vp8 is even hardware decoded on most devices out there [12:35] <mpfundstein> xlinkz0: is it for streaming or progressive download? [12:36] <mpfundstein> xlinkz0: wowza can stream to flash. so you could pipe your input into ffmpeg, udp it to wowza and stream it to flash [12:36] <xlinkz0> it's just for some video viewing [12:36] <xlinkz0> nvm the web dev was just a little lazy [12:37] <xlinkz0> and didn't want to fallback to flash :D [12:44] <luc4> Hi! I have some videos I would like to transcode to h264 to save some space. Can you suggest some parameters I can use to increase the compression ratio keeping the quality similar to the source? [12:45] <Mavrik> well, that's an oxymoron :) [12:45] <luc4> Mavrik: what? quality and compression? [12:45] <Mavrik> increasing compression without losing quality :) [12:46] <luc4> Mavrik: afaik some compression techniques are lossless. [12:46] <luc4> Mavrik: like bz2 :-) [12:46] <Mavrik> do you have raw videos right now? [12:47] <Mavrik> back in 30 mins [12:47] <luc4> Mavrik: I have videos in various formats, like mpeg and so... I'm transcoding with ffmpeg to h264 and aac. [12:47] <luc4> ok, no problem [12:47] <Mavrik> luc4, I suggest you find a -crf value that looks good [12:47] <Mavrik> luc4, and resolution that is acceptable for you and use the slowest preset (slow, medium) that you can still handle while transcoding [12:48] <Mavrik> luc4, see this: https://www.virag.si/2012/01/web-video-encoding-tutorial-with-ffmpeg-0-9/ [12:48] <Mavrik> but use "-crf" values instead ob static bitrate with "-b:v" [12:49] <xlinkz0> luc4: http://ffmpeg.org/trac/ffmpeg/wiki/x264EncodingGuide [12:49] <luc4> xlinkz0: read that already [12:49] <luc4> xlinkz0: thanks [12:49] <luc4> Mavrik: I'll read that, thanks! [12:51] <luc4> ffmpeg uses high profile by default right? [12:53] <relaxed> I think it depends on the input [12:55] <luc4> relaxed: oh, thanks! And it is not clear to me the 1st pass here: https://www.virag.si/2012/01/web-video-encoding-tutorial-with-ffmpeg-0-9/. Is it outputting to /dev/null? Maybe it modifies the original file? [12:58] <relaxed> Yes, the first pass output isn't needed. [13:21] <luc4> No way to get a progress bar from ffmpeg? [13:58] <khali> I'm trying the removelogo filter for the first time [13:59] <khali> it totally kicks asses [14:00] <vldcnst> I have a x264 (MKV) stream that I'm trying to convert to JPEG snapshots (write to a file snapshots of the input at a selectable frame rate), is there a way I can do this with ffmpeg? [14:38] <first-time-here> hi [14:38] <first-time-here> i cant stream my webcam with ffmpeg :( [14:38] <first-time-here> i try this command [14:39] <first-time-here> ffmpeg -f v4l2 -i /dev/video0 -vcodec rawvideo -f mpegts udp://127.0.0.1:1234 [14:39] <first-time-here> i get frame= 63 fps= 31 q=0.0 size= 40757kB time=00:00:02.10 bitrate=158990.7kbits/s [14:39] <ubitux> then it's working? [14:40] <first-time-here> but i cant view the stream [14:40] <first-time-here> i try with VLC [14:40] <first-time-here> nothing. [14:41] <first-time-here> i want to make this thing [14:42] <first-time-here> http://ffmpeg.org/trac/ffmpeg/wiki/How%20to%20capture%20a%20lightning%20%28t... [14:44] <ubitux> that delay option doesn't seem to work.. [14:45] <ubitux> oh well, with very recent versions, looks like a bug, but whatever [14:46] <ubitux> anyway [14:46] <first-time-here> ubitux: but i need this delay [14:46] <ubitux> you likely want a server [14:46] <ubitux> ffserver might work for you [14:46] <first-time-here> what do you mean? [14:47] <ubitux> a dedicated tool for serving stream, like ffserver [14:49] <first-time-here> i need to stream all the time with a delay, and if i get a lighetning i record the last few seccends from the streaming. [14:49] <ubitux> configure a ffserver to do that [14:50] <ubitux> https://www.ffmpeg.org/ffserver.html [14:52] <first-time-here> how i install it? [14:55] <ubitux> it's distributed with ffmpeg [14:57] <Mavrik> (except on Windows?) [15:00] <ubitux> no idea [15:25] <first-time-here> someone can guide me about streaming my webcam? [16:02] <first-time-here> someone can help me step by step how i can streme my webcam ? [16:10] <arpu> hello [16:10] <arpu> in the console i see bitrate=... is this audio + video bitrate or only the video bitrate ? [16:12] <Mavrik> iirc it's the output bitrate [16:12] <Mavrik> in some sliding window [17:54] <funyun> hi. how do i use ffmpeg to convert an mp3 to .aif with PCM codec? [17:54] <funyun> can it be done? [17:55] <Mavrik> try something like [17:55] <Mavrik> ffmpeg -i blah.mp3 -codec:a pcm_16le output.aif [17:55] <Mavrik> check the exact name of pcm codec with ffmpeg -codecs [17:56] <funyun> ffmpeg -codecs, very useful. thank you :) [18:24] <ayaka> I want to use ffmpeg in android so I compile out bambuser's ffmpeg, but I don't know how to install it [20:55] <durandal_1707> ayaka: why, there is something special needed for install [20:55] <durandal_1707> ? [21:08] <ayaka> durandal_1707, how to install it? [21:11] <sacarasc> ayaka: Check the site where you got it from. [21:12] <ayaka> sacarasc, ok I see [21:13] <ayaka> sacarasc, are you sure that it has that doc? [21:13] <sacarasc> No, because it's not an official ffmpeg thing, so who knows what it has? [21:14] <ayaka> I know that project from https://ffmpeg.org/trac/ffmpeg/wiki/How%20to%20compile%20FFmpeg%20for%20Andr... [21:14] <ayaka> is there a good way to install ffmpeg on android [21:18] <sacarasc> I would assume once you have the binary, you'd install it like you would any other android application. [21:19] <ayaka> but it doesn't build a apk [21:59] <ayaka> thanks [23:24] <Aprel> hi noticed while some files are being encoded I can't play them until the encoding's finished. Thought I saw somewhere that there's a compile option to allow output to be previewed while encoding is in progress? [23:25] <Mavrik> uh [23:25] <Mavrik> that depends on output container [23:25] <Mavrik> nothing much to do with compile options [23:26] <Aprel> hm, this happened with .mp4 container w x264 video and aac audio. [23:27] <Aprel> What containers/codecs can be read while encoding? Is there a term I can google for a list? [23:27] <sacarasc> MP4 makes its index when the file has completed encoding. [23:27] <sacarasc> You can't play it without the index, so... [23:27] <Aprel> ah i see [23:28] <Aprel> Is there another container that can hold x264+acc that I could use? [23:29] <sacarasc> Matroska. (.mkv) [23:30] <Aprel> k, Matroska indexes the file in a way that can be played be while being encoded? [23:31] <sacarasc> Yeah, I think so,. [23:32] <Aprel> sorry to bother, but can .avi do this to? I'm just worried that Matroska might not play in many media players. [23:34] <sacarasc> All decent software media players will play it. If you do AVI, you can't use B-frames or something... [23:36] <Aprel> i see. Thanks for the info :) While I'm here, I have another q: if I have an mp4 file (w acc) and I want to dump just the audio to another file, does ffmpeg decode the acc audio to raw and then back to aac, or can it just dump the orginal acc? [23:38] <Mavrik> usually MPEG2-TS container is used for streaming uses :) [23:38] <Mavrik> but .mkv should work as well [23:38] <Mavrik> Aprel, depends on what you tell ffmpeg to do with the stream [23:38] <Mavrik> using "copy" as codec will just dump it without decoding [23:39] <Mavrik> so "ffmpeg -i blah.mp4 -codec:a copy -vn output.m4a" will dump only audio track(s) to the m4a file without changing them [23:43] <Aprel> Mavrik, sacarasc: great! Thank you for all the help. [00:00] --- Sun May 26 2013