[02:21] <nitero> hi, are there any gui's for ffmpeg, for linux? i need to convert .mkv to .avi with a certain resolution. i'm not adverse to learning CLI but i'm not very experienced with it ... i'm reading the manpage for ffmpeg right now [02:25] <c_14> There are, but I don't know any good ones. I'd just go with the cli if I were you. It's pretty easy to learn and allows you to accomplish rather complex things once you're used to it. [02:46] <c_14> If you're just trying to convert to something specific, there's usually a wiki page with examples that you can look at. [02:47] <nitero> okay, that sounds good, i'll look that up, thank you =) [08:45] <maksimkaaa> Hi, I want to type a timestamp on every image of a set of 1000 frames I have, I am planning to convert the images into mp4 but I need a guide about putting a TimeStamp on every images.. is there any good doc about that? [08:45] <maksimkaaa> **The timestamp is different for every image. [08:54] <blippyp> maksimkaaa: do you have a table of the filenames and timestamps? [09:13] <maksimkaaa> Hi, I want to type a timestamp on every image of a set of 1000 frames I have, I am planning to convert the images into mp4 but I need a guide about putting a different TimeStamp on every image.. is there any good doc about that? [09:22] <blippyp> maksimkaaa: um yeah -> have you made a table with the filenames and timestamps yet? [11:17] <Wu> c_14: thanks for the info and the link yesterday, I managed to replace ffmpeg2theora with ffmpeg, same resulting ogv [11:40] <maksimkaaa> Hi, I have 300 frames ready to generate video using ffmpeg, I know the timestamp of every image and want to print the timestamp of every image over that image while generating the video. how is that possible with ffmpeg? [14:09] <mrskman> Hi! Is there any way how convert videos to OGV with ffmpeg and using multiple threads? I guess libtheora has no multi-thread support but is there any good alternative? [14:10] <klaxa|work> if you have multiple videos you can run multiple ffmpeg instances [14:13] <mrskman> Sure, but I need to convert only single video file [15:16] <coreb1te> mrskman: ffmpeg have a "-threads" parameter [15:17] <coreb1te> for example, ffmpeg -i video.avi -threads 4 video.mp4 [15:18] <coreb1te> in this case use 4 threads to convert the video and is faster [15:19] <relaxed> libtheora isn't multithreaded [15:21] <coreb1te> upps.. sorry, xD [15:22] <relaxed> I think libx264 now uses all cores by default [15:24] <coreb1te> relaxed: yes, but I think that is necesary ffmpeg compiled with option "--enable-runtime-cpudetect" [15:26] <relaxed> No, I just tested it. [15:26] <Mavrik> coreb1te, no it isn't [15:26] <Mavrik> x264 always does runtime cpudetect [15:27] <coreb1te> ok, perfect [15:27] <Mavrik> it's a separate library that does not rely on ffmpeg and thus ffmpeg configuration parameters have no effect on it. [15:27] <relaxed> libx264 did not used to be multithreaded by default when using ffmpeg. [15:28] <relaxed> you had to pass -threads 0 [15:28] <Mavrik> yes, ffmpeg now passes threads 0 by default. [15:29] <relaxed> that contradicts your last statement [15:31] <Mavrik> no. [15:31] <coreb1te> I'm using now ffmpeg 2.2.2 and when convert a video to .mp4 using libx264 codecs by default use all cores [15:31] <Mavrik> you just didn't understand that "configuration parameters" in those context are parameters passed to "./configure" like the "--enable-runtime-cpudetect" mentioned by coreb1te [15:31] <Mavrik> not parameters passed when running ffmpeg. [15:31] <relaxed> right [15:32] <relaxed> coreb1te: it's been the default for some time [16:35] <kriegerod> is there a way to look at ffplay-ish audio visualizer without having audio output to any audio devices? [16:35] <kriegerod> i.e. i need either to show visualizer in ffmpeg or to mute ffplay [16:43] <Sembiance> Guides online say to use 'x264 --help' to see available presets, but there is no 'x264' command on my system. [16:49] <c_14> kriegerod: ffplay -an ? [16:49] <Sembiance> figured it out, I was missing 'x264-encoder' package ;) [17:13] <Sembiance> So, using ffmpeg with x11grab, I am NOT getting a cursor, but I want one :) [17:13] <Sembiance> Using command `ffmpeg -f x11grab -r 30 -s 1280x720 -i :0.0+1721,262 -vcodec libx264 -preset ultrafast -threads 0 -y test.mp4` with ffmpeg 2.2.1 [17:14] <sacarasc> -draw_mouse 1 [17:14] <sacarasc> I think. [17:14] <Sembiance> tried that :) [17:14] <Sembiance> just tried using a 0,0 window position, worked then [17:15] <Sembiance> so it appears to have some weird bug capturing the cursor when on my second monitor [17:21] <Sembiance> hrm, err hrm... [17:24] <Sembiance> oh wait, so I guess no, I didn't see a cursor after all even with 0x0 window position [17:24] <Sembiance> hrm.... [17:31] <Sembiance> no, no cursor, no matter what I try. hrm... [17:36] <Sembiance> well, recordmydesktop won't draw one either and trying --dummy-cursor with it seg faults it. [17:36] <Sembiance> so maybe my xmonad config somehow isn't playing nicely with cursor recording ;) [19:29] <mrskman> https://trac.ffmpeg.org/wiki/Seeking%20with%20FFmpeg#Fastandaccurateseeking Is it true that -ss output param is no longer needed when using version >=2.1? [19:30] <c_14> Where did you hear that? [19:31] <mrskman> I'm guessing from changelog: - when transcoding with ffmpeg (i.e. not streamcopying), -ss is now accurate [19:31] <mrskman> even when used as an input option. Previous behavior can be restored with [19:31] <mrskman> the -noaccurate_seek option. [19:36] <c_14> Hmm, if it's in the changelog it should be true. I also just tested it and it seems to be working. [19:37] <tyler1> is there a way to make an inputted file be divisble by 2 both height and width? [19:42] <c_14> If you have a given height: scale="trunc(oh*a/2)*2:720" for a given width scale="1280:trunc(ow/a/2)*2" [19:42] <tyler1> @c_14 the problem is that i don't know the height or width ahead of time [19:43] <tyler1> if I have 147x89 source, I need to output it as 148x90 [19:43] <tyler1> (or 148x88) or whatever [19:44] <c_14> you can use iw and ih as variables which contain the input width and the input height respectively. [19:45] <tyler1> could you give me an example with that? [19:50] <c_14> scale="trunc(iw/2)*2:trunc(ih/2)*2" should do it [19:50] <c_14> If my understanding of trunc is correct, that should round down every time. [19:55] <c_14> Ye, it'll round every non-even number down to the nearest even number. [19:58] <tyler1> awesome let me try that, thanks c_14 [20:10] <tyler1> c_14: i'm getting this error: Unable to find a suitable output format for 'scale="trunc(iw/2)*2:trunc(ih/2)*2"' [20:10] <tyler1> here's my command: ffmpeg scale="trunc(iw/2)*2:trunc(ih/2)*2" -i temp/monq%05d.png -vcodec libx264 -an -pix_fmt yuv420p -preset fast -y out/monq.gif.mp4 [20:10] <c_14> ffmpeg -vf scale[..] [20:10] <tyler1> ah [20:10] <c_14> And after the -i $file [20:11] <tyler1> after -i but is it required to be before something else? or just after -i [20:11] <c_14> After -i and before the output file name [20:13] <jspencer> ohai...I have a multi-channel audio question [20:14] <klaxa> go ahead [20:14] <jspencer> when I create a 6 channel (5.1) audio file (using amerge) channel 6 is always distorted (sounds like a low pass) but when I create a 7 channel (6.1) all channels are clean [20:15] <jspencer> I assumed the distortion in the 6 channel is because it's the LFE channel [20:15] <jspencer> but as none of the channels in the 7 channel file have the same distortion I'm not so sure [20:16] <jspencer> so...what I'd really like is a 6 channel file without any distortion on that 6th channel...if possible [20:35] <jspencer> my workaround will probably be to use 6.1 with a silent channel, I just don't understand why 5.1 has one distorted channel but 6.1 is clean throughout... [21:52] <tyler1> hey c_14 still having issues [21:52] <c_14> What seems to be the problem? [21:53] <tyler1> I ran : ffmpeg -i monq%05d.png -vf "crop=((in_w/2)*2):((in_h/2)*2)" -vcodec libx264 -an -pix_fmt yuv420p -preset fast -y ~/www/gifvid/output.mp4 [21:53] <tyler1> and still getting: height not divisible by 2 (500x495) [21:53] <c_14> you need trunc(in_w/2)*2 [21:54] <c_14> Or in this specific case trunc(in_h/2)*2 [21:54] <tyler1> ah i did crop instead of scale [21:54] <tyler1> I think its working now [21:54] <c_14> If you're not truncating, you won't get an even number. [21:55] <tyler1> this worked: -vf scale="trunc(iw/2)*2:trunc(ih/2)*2" [21:55] <tyler1> thanks again for your help :) [21:56] <c_14> np [21:57] <tyler1> it is working from ffmpeg command line but not with this node package : https://www.npmjs.org/package/fluent-ffmpeg [21:57] <tyler1> :\ [21:58] <tyler1> [Parsed_scale_0 @ 0x7fddbc800000] [Eval @ 0x7fff565d9440] Unknown function in '"trunc(iw/2)*2' [22:00] <c_14> I don't know anything about that, and that isn't supported here; but are you using .addOption('-vf','scale="trunc(iw/2)*2:trunc(ih/2)*2"') ? [22:01] <tyler1> I think so, I have this: .addOptions(['-vf scale="trunc(iw/2)*2:trunc(ih/2)*2"', '-pix_fmt yuv420p', '-preset fast']) [22:02] <tyler1> oh maybe I need to seperate the -vf, let me try that [22:04] <tyler1> cf_14 this was the full error: [22:04] <tyler1> [Parsed_scale_0 @ 0x7fea93000000] [Eval @ 0x7fff5f14b440] Unknown function in '"trunc(iw/2)*2' [22:04] <tyler1> [Parsed_scale_0 @ 0x7fea93000000] [Eval @ 0x7fff5f14b440] Invalid chars '"' at the end of expression 'trunc(ih/2)*2"' [22:04] <tyler1> Error when evaluating the expression 'trunc(ih/2)*2"'. [22:04] <tyler1> Maybe the expression for out_w:'"trunc(iw/2)*2' or for out_h:'trunc(ih/2)*2"' is self-referencing. [22:04] <tyler1> [Parsed_scale_0 @ 0x7fea93000000] Failed to configure output pad on Parsed_scale_0 [22:04] <tyler1> Error opening filters! [22:05] <c_14> If you have an error that's more than one line long, please use a pastebin so you don't spam the channel. [22:05] <tyler1> ah okay [22:05] <klaxa> remove the quotes though [22:05] <relaxed> it looks like you ned .withVideoFilter('scale=\'trunc(iw/2)*2:trunc(ih/2)*2\'') [22:05] <klaxa> >Invalid chars '"' [22:05] <relaxed> from a quick glance [22:07] <relaxed> that's my 2 seconds, 2 cents :) [22:07] <tyler1> thanks all, ill try the back slashes [22:08] <tyler1> worked! [22:08] <tyler1> thanks c_14 klaxa relaxed [22:18] <aarobc> So I have a subsonic server, and I'm trying to get it to use a new version of ffmpeg. Problem is, the newer version doesn't allow streaming while it's transcoding, and it seems slower too. Any ideas? [22:38] <tyler1> one other question - how can I set the output fps (using -r) as a multiple of whatever the input is [22:41] <c_14> setpts=x*PTS [22:41] <c_14> Wait, no. [22:43] <c_14> Can I ask why you would want to do that? [22:46] <tyler1> sure, I'm converting gifs to video, but the outputted video ends up being significantly faster than the gif, and since I can't really read the "fps" of a gif (doesn't exist), I need to estimate it [22:47] <c_14> In that case, setpts might be what you're looking for. [22:47] <c_14> https://trac.ffmpeg.org/wiki/How%20to%20speed%20up%20/%20slow%20down%20a%20v... [22:48] <tyler1> ah, perfect [22:50] <tyler1> so making the output twice as slow is eesentially doubling the frames and thus the file size? [22:52] <c_14> Usually, yes. [23:53] <jedir0x> so i'm generating a video with ffmpeg and i'm finding that the fps as described by ffprobe -i (and players) is half of what i expect. [23:53] <jedir0x> vCodecCtx->time_base.num = 1 vCodecCtx->time_base.den = 30; [23:53] <jedir0x> that's how i'm setting it - is there anything else that could be causing it to do this? [00:00] --- Thu May 15 2014