[00:15:18 CEST] <arp> hello [02:39:05 CEST] <hataki> hi, I have issue with this command....ffmpeg -i "a2.flac" -ss 0 -t 91 -acodec copy "axxxxxxx.flac"...output has 91 seconds audio but duration is still as input file...ffmpeg version N-85750-ga75ef15 [02:53:48 CEST] <klaxa> huh that's weird [02:56:53 CEST] <hataki> General Complete name : C:\Users\hp\Videos\a2.flac Format : FLAC Format/Info : Free Lossless Audio Codec File size : 247 MiB Duration : 24 min 9 s Overall bit rate mode : Variable Overall bit rate : 1 426 kb/s Writing application : Lavf57.72.101 Audio Format : FLAC Format/Info : Free Lo [02:57:19 CEST] <hataki> General Complete name : C:\Users\hp\Videos\axxxxxxx.flac Format : FLAC Format/Info : Free Lossless Audio Codec File size : 18.1 MiB Duration : 24 min 9 s Overall bit rate mode : Variable Overall bit rate : 105 kb/s Writing application : Lavf57.72.101 Audio Format : FLAC Format/Info : Fr [09:41:19 CEST] <tristandm> Hi, so I'm trying to use ffmpeg to stream from YouTube out to a file using the realtime (-re) parameter on the input stream (youtube source url, found with youtube-dl) and partially through the stream the socket disconnects. Any insight? https://pastebin.com/3sujwmZC [09:45:24 CEST] <tristandm> Here's a better paste: https://pastebin.com/jM1fWN8e [10:14:14 CEST] <Pandela> Wanna hear what photoshopped audio data sounds like? [10:14:50 CEST] <c3r1c-Linux> Only if it takes a picture of brittany spears,a nd then sounds like her. [10:15:31 CEST] <Pandela> kek [10:15:40 CEST] <c3r1c-Linux> ;-) [10:15:47 CEST] <Pandela> https://my.mixtape.moe/mphrio.mp3 [10:15:52 CEST] <Pandela> This'll have to suffice [10:16:22 CEST] <cousin_luigi> Greetings. [10:16:30 CEST] <Pandela> ayy lmao [10:16:48 CEST] <cousin_luigi> How do I change the aspect ratio and also zoom into it by an arbitrary factor? [11:01:47 CEST] <Pandela> thebombzen: https://my.mixtape.moe/elfsrj.mp3 :-aewdigasefkiusf) [11:02:11 CEST] <thebombzen> You're the one who was playing with rawaudio <-> rawvideo stuff right [11:02:44 CEST] <Pandela> Yee [11:03:18 CEST] <Pandela> I encoded audio data into an image and photoshopped it lmao [11:03:49 CEST] <thebombzen> yea I was the one who helped you with testsrc or what [11:04:16 CEST] <Pandela> ya you showed me dat filter, was pretty dank [11:04:41 CEST] <Pandela> I updated my shit and got gbrp16le [11:05:46 CEST] <Pandela> https://a.yiff.moe/rxnyxz.png Moonlight Sonata [11:06:31 CEST] <thebombzen> You should consider http://0x0.st/ [11:06:44 CEST] <thebombzen> temporary upload thing [11:07:10 CEST] <Pandela> rad domain name [11:07:12 CEST] <thebombzen> cause it's not like that stuff needs to be on the internet forever. so like if you're just sending someone a small file it's ideal [11:07:32 CEST] <thebombzen> I mean imgur stores every image they've ever had ULed to them [11:07:40 CEST] <furq> no they don't [11:07:48 CEST] <Pandela> no u [11:07:58 CEST] <thebombzen> I can view all the images I've ever ULed to them :O [11:08:15 CEST] <furq> you can delete them all as well [11:08:19 CEST] <furq> how about that [11:09:27 CEST] <Pandela> delet this [11:09:29 CEST] <Pandela> https://www.youtube.com/watch?v=dQw4w9WgXcQ [11:10:12 CEST] <thebombzen> well okay [11:10:13 CEST] <thebombzen> but I mean [11:10:18 CEST] <thebombzen> unless you explicitly delete them [11:10:20 CEST] <thebombzen> they're still going to be there [11:10:26 CEST] <furq> or someone else has them taken down [11:10:35 CEST] <thebombzen> I'm not saying the images are immortal [11:10:40 CEST] <thebombzen> I'm saying they're not temporary [11:10:45 CEST] <thebombzen> which isn't the same thing [11:10:50 CEST] <thebombzen> they're not removed unless someone elects to remove them [11:11:01 CEST] <furq> that sounds temporary to me [11:11:12 CEST] <thebombzen> are you just being difficult for the sake of being difficult [11:11:17 CEST] <furq> i might be [11:11:27 CEST] <thebombzen> Pandela: either way you should check that out [11:11:36 CEST] <thebombzen> and if you can't remember the command line, then.... [11:11:42 CEST] <Pandela> I shall [11:12:00 CEST] <thebombzen> https://0x0.st/gT6.bin [11:12:24 CEST] <Pandela> I usually use https://rduke.com/owlfarm/ [11:12:50 CEST] <thebombzen> I wrote a script that uploads the first argument to 0x0.st, takes the link provided and copies it into both clipboards [11:13:30 CEST] <Pandela> That's pretty sexy [11:13:55 CEST] <thebombzen> I made it do both cause I could never remember whether it was in the plain clipboard (middleclick) or the rich clipboard (Ctrl+V) [11:14:06 CEST] <thebombzen> so it puts it in both [11:15:03 CEST] <furq> ladies [11:17:42 CEST] <Pandela> memes [15:05:02 CEST] <cousin_luigi> Greetings. [15:05:19 CEST] <cousin_luigi> I don't understand which operator to use to zoom in a video. zoompan? crop? [15:12:08 CEST] <c_14> zoompan probably [15:20:06 CEST] <cousin_luigi> How can I find out the values to use if I also want to change the aspect ratio at the same time? [15:22:26 CEST] <c_14> crop,scale might be easier in that case [15:35:12 CEST] <cousin_luigi> Indeed. But is there a way to preview the result with ffplay so that I don't have to wait for a full run of the conversion? Or perhaps I should convert my video only for a few seconds? [15:35:23 CEST] <cousin_luigi> Well, a few seconds of the video, I mean. [15:37:18 CEST] <c_14> usually just do a conversion of a few seconds, yeah [15:37:40 CEST] <c_14> though if you use a format that supports playing as you encode you can just view that [15:45:48 CEST] <cousin_luigi> c_14: Unfortunately the latter is not true. [15:46:09 CEST] <c_14> hmm? [15:46:14 CEST] <c_14> what format? [15:46:31 CEST] <c_14> mpeg-ts should work and matroska if you enable live mode [15:46:59 CEST] <cousin_luigi> h264 inside mp4. Could try mkv I suppose. [15:47:10 CEST] <c_14> mp4 won't work [15:47:13 CEST] <cousin_luigi> Indeed. [15:47:27 CEST] <cousin_luigi> What's this live mode? [15:47:29 CEST] <c_14> -live [15:47:39 CEST] <c_14> might be -live 1 [15:47:41 CEST] <c_14> not sure [15:54:19 CEST] <cousin_luigi> crop and aspect or setdar don't work together. Not sure how to use scale:/ [15:54:54 CEST] <c_14> crop the portion of the input you want to keep and then scale to the size you want it to end up as? [15:57:20 CEST] <c_14> so if you want the center of your video, something like crop=700:600,scale=1400:1200 [15:57:35 CEST] <c_14> if you want the center 700:600 block and then want it x2 [16:36:12 CEST] <dl2s4> hi, why "ffmpeg -i input.mkv > text.txt" does not work? [16:36:48 CEST] <JEEB> what on earth are you trying to do there? [16:36:59 CEST] <JEEB> you haven't told ffmpeg to output anything to stdout yet you are piping it? [16:37:15 CEST] <JEEB> if you just want the text, most tools output to stderr [16:37:16 CEST] <dl2s4> i want to see the streams of the input.mkv and put the console output to a txt [16:37:17 CEST] <JEEB> which is 2> [16:37:38 CEST] <JEEB> stdout is generally not used because then you cannot pipe an actual output to a following process [16:37:49 CEST] <JEEB> <one app> | <another app> [16:37:56 CEST] <JEEB> this would be impossible if stdout was used for logging [16:38:15 CEST] <dl2s4> 2> it is thanks [16:38:25 CEST] <cousin_luigi> c_14: will try that, thanks! [16:57:27 CEST] <cousin_luigi> How do I find out the current h264 quality of a clip so that I can supply an h265 equivalent crf? [17:00:01 CEST] <BtbN> you can't [17:00:16 CEST] <BtbN> if you already have a h264 version, there is rarely any point to re-compress [17:04:30 CEST] <cousin_luigi> ok [17:05:06 CEST] <cousin_luigi> well, now I have the right crop, the right quality but as soon as I force an aspect ratio, my window gets cropped further. How do I tell ffmpeg to use black bands? [17:05:37 CEST] <cousin_luigi> or perhaps that means that I don't really have the correct resolution? [17:11:45 CEST] <bencc> is there a filter to fix broken voice in the audio channel? [17:11:55 CEST] <bencc> to make the speech sound more fluent and not broken [17:12:09 CEST] <bencc> like opus plc works [17:55:29 CEST] <tristandm> Hi, so I'm trying to use ffmpeg to stream from YouTube out to a file using the realtime (-re) parameter on the input stream (youtube source url, found with youtube-dl) and partially through the stream the socket disconnects. Any insight? https://pastebin.com/jM1fWN8e [18:02:10 CEST] <BtbN> download the file first, and use -re on the file then [18:02:18 CEST] <BtbN> you might just plain timeout the server connection [19:21:10 CEST] <hiihiii> hello [19:21:55 CEST] <hiihiii> how would you drop the last frame out of 3. in other words select the first two frames and drop the last? [19:22:12 CEST] <hiihiii> A B C A B C A B C [19:22:14 CEST] <hiihiii> then gat [19:22:22 CEST] <hiihiii> A B A B A B [19:23:24 CEST] <hiihiii> using fps drops the middle frame [19:23:27 CEST] <hiihiii> I get [19:23:34 CEST] <hiihiii> A C A C A C [19:23:48 CEST] <hiihiii> end that messes with my filters [19:24:31 CEST] <hiihiii> Can I use select filter? [19:32:43 CEST] <c_14> don't see why not [19:51:53 CEST] <faLUCE> (libav) Hello. Is there an EASY way to demux LIVE packets, instead of filling the AVIOContext buffer through the read callback and then call av_read_frame()? This method sounds terrible, and I can't believe that the API doesn't provide an easier mechanism [20:21:41 CEST] <GNU\colossus> is there an objective way to compare the quality for two different output files that are results of the same input? [20:25:02 CEST] <furq> yes, but they're not really useful these days [20:26:18 CEST] <furq> modern video codecs will deliberately do things which reduce psnr/ssim scores [20:26:23 CEST] <furq> s/codecs/encoders/ [20:29:51 CEST] <roxlu> hey! I just saw that ffmpeg support VideoToolbox based encodding. Does this also work on iOS? [20:32:11 CEST] <Mandevil> Why I am getting [libx264 @ 00000000005ecb60] DPB size (16 frames, 518400 mbs) > level limit (5 frames, 184320 mbs) [20:32:22 CEST] <Mandevil> When I am not specifying ref frames? [20:32:28 CEST] <Mandevil> https://pastebin.com/y2EfdzQG [20:32:31 CEST] <furq> are you specifying -preset veryslow [20:32:43 CEST] <furq> good guess furq [20:32:45 CEST] <Mandevil> And that forces -refs 16? [20:32:54 CEST] <furq> yeah [20:33:03 CEST] <Mandevil> But why doesn't x264 just up the level? [20:33:06 CEST] <furq> i don't know [20:33:09 CEST] <furq> it should do that [20:33:14 CEST] <furq> that's always worked for me anyway [20:33:25 CEST] <Mandevil> Yes, it works when you use x264 directly. [20:33:31 CEST] <furq> i mean through ffmpeg [20:33:33 CEST] <ertes> hi& what are the presets i can use with libx264 for someone who doesn't want to learn what all the individual options do? [20:33:40 CEST] <furq> i always use -preset veryslow and it sets the level automatically [20:34:14 CEST] <Mandevil> furq: It says it is using level 5.2 [20:34:19 CEST] <Mandevil> That _should_ be sufficient. [20:34:45 CEST] <furq> ertes: http://vpaste.net/ptWeO [20:35:07 CEST] <furq> Mandevil: is this 4k [20:35:15 CEST] <Mandevil> Yes. [20:35:20 CEST] <Mandevil> 3840x2160 [20:35:40 CEST] <furq> yeah i'm guessing that's just too much for h264 to handle [20:35:55 CEST] <Mandevil> It's not the first 4k video I am encoding. [20:36:03 CEST] <Mandevil> Why I haven't seen this before. [20:36:05 CEST] <furq> wikipedia reckons 2160p60 will only support 5 refs at 5.2 [20:36:10 CEST] <ertes> furq: thanks! [20:36:14 CEST] <Mandevil> This is 25 fps video. [20:36:18 CEST] <furq> shrug [20:36:34 CEST] <furq> actually nvm the framerate obviously won't matter [20:36:45 CEST] <Mandevil> :) [20:37:14 CEST] <Mandevil> I was encoding different 4k video recently and haven't noticed the message. [20:37:20 CEST] <furq> you could maybe try -level 52 [20:37:26 CEST] <furq> forcing level will normally cap refs [20:37:38 CEST] <GNU\colossus> furq, thanks [20:37:45 CEST] <furq> i'm surprised libx264 doesn't handle that automatically though [20:37:53 CEST] <furq> that might be worth a bug report if you're on the latest [20:39:27 CEST] <Mandevil> *more testing needed [20:40:12 CEST] <furq> i think it normally handles it by just bumping the level [20:40:18 CEST] <furq> but obviously it can't do that in this case [20:40:35 CEST] <Mandevil> But it says it _is_ using 5.2 [20:40:43 CEST] <furq> well yeah but 5.2 is the highest [20:40:44 CEST] <Mandevil> And 5.2 _is_ enough for 2160p@25 [20:40:46 CEST] <furq> and that only does 5 refs [20:41:23 CEST] <furq> i think -level 52 capping refs is done by ffmpeg [20:41:47 CEST] <Mandevil> I can just specify -refs 5 and be done with it. [20:41:52 CEST] <furq> yeah that works [20:42:17 CEST] <Mandevil> I assume most SW decoder will handle that ok anyway? [20:42:30 CEST] <furq> it's within the spec [20:42:38 CEST] <furq> i've never really touched 4k x264 though [20:42:41 CEST] <Mandevil> I mean, refs 16 :-) [20:42:45 CEST] <furq> oh [20:42:46 CEST] <furq> no idea then [20:42:59 CEST] <Mandevil> 4k x265 is unbearably slow on my PC. [20:43:06 CEST] <furq> i certainly wouldn't expect hardware decoders to touch it [20:43:51 CEST] <furq> if ffmpeg decodes it ok then most software players will work [20:44:00 CEST] <furq> all the ones worth using use libavcodec anyway [20:45:09 CEST] <furq> and yeah x265 is generally unbearably slow [20:45:48 CEST] <Mandevil> 3 minute 4K video... something like 20 hours encoding on veryslow. [20:45:59 CEST] <furq> nice [20:46:19 CEST] <Mandevil> Then again, i5 ivy bridge is not the fastest CPU in the universe. [20:46:39 CEST] <furq> fwiw -crf 18 is probably overkill with 4k [20:46:48 CEST] <furq> i doubt it makes too much difference for three minutes though [20:47:01 CEST] <Mandevil> furq: I don't have much grasp of x265 crf's. [20:47:06 CEST] <furq> i mean with x264 [20:47:31 CEST] <furq> you can get away with higher crf at higher resolution [20:47:31 CEST] <Mandevil> 18 is my go to crf for "best quality, bitrate doesn't matter" [20:47:38 CEST] <furq> fair enough [20:48:13 CEST] <Mandevil> BTW, I tried encoding with libx265 on 32-thread Xeon. [20:48:27 CEST] <Mandevil> Surprisingly, the loadavg barely went over 10. [20:48:45 CEST] <Mandevil> So the encoder was unable to saturate the CPU :-( [20:49:09 CEST] <Mandevil> (it was 720p source, maybe it had something to do with it). [20:52:31 CEST] <Mandevil> So I stopped the encode and used refs=5 [20:52:39 CEST] <Mandevil> Now it chose level 5.1 [20:52:48 CEST] <Mandevil> Go figure. [22:45:59 CEST] <tristandm> @BtbN Is there a way that I can have ffmpeg read from a partial file? The issue i'd be running into if i download the whole file would be files that are large, like people playing 10h youtube videos just for a portion of it. Previously when I tried having ffmpeg use a partial file as an input, it would only read up to the point where the file was at the time ffmpeg started reading from it [22:47:21 CEST] <tristandm> Like a way to treat the file as a stream input [23:55:16 CEST] <faLUCE> (libav) Hello. Is there an EASY way to demux LIVE packets, instead of filling the AVIOContext buffer through the read callback and then call av_read_frame()? This method sounds terrible, and I can't believe that the API doesn't provide an easier mechanism [00:00:00 CEST] --- Mon May 15 2017