[00:05] <psc1963> hello, i am a newbie that is trying to use ffmpeg to convert amr-wb found in an rtp stream to a wav file so I can listen to it. does anyone have a command example i could try? [00:13] <llogan> psc1963: ffmpeg -i rtmp://[username:password@]server[:port][/app][/instance][/playpath] output.wav [00:13] <llogan> oh, rtp: rtp://hostname[:port][?option=val...] [00:14] <llogan> http://ffmpeg.org/ffmpeg-protocols.html#rtp [00:19] <Ankman> oh, people here :-) [00:22] <Ankman> anyway, may be someone can help. i have a big matroska file which i cannot play with my laptop. i usually render it down. i wonder if it's possible to keep the aspect ratio. until now i used the -s and then widthXheight. but i have to calcualte it. isn't it possible to tell ffmpeg i want to render it down to 1/4 and it takes care of it? [00:23] <JEEB> yes, look at the examples for the scale video filter [00:23] <JEEB> in the documentation @ ffmpeg.org [00:23] <llogan> http://ffmpeg.org/ffmpeg-filters.html#scale [00:23] <Ankman> thanks [00:23] <llogan> specifically the "-1" example [00:25] <Ankman> ok, will try that with ffplay first [00:27] <robadob> I've become stuck with a weird linker issue when trying to convert an ffmpeg AVFrame into a QT QVideoFrame. 2 of the constructors for QVideoFrame can't be linked ('undefined reference to..') if i have 1 of many ffmpeg headers(avcodec/swscale/avformat etc) included (in extern "C") tags. I've been fiddling with this for about a day now before tracing [00:27] <robadob> it back to these ffmpeg headers, but i'm still completely stumped as to why they should affect an unrelated library/how to fix it. [00:38] <Ankman> thanks again [01:17] <Logicgate> How do I get the author from an mp4 with ffmpeg? [01:17] <Logicgate> it's not within show_format or show_streams [01:23] <klaxa> define "author" [01:28] <Logicgate> im screenshottingh [01:28] <Logicgate> hold up [01:29] <Logicgate> http://i.imgur.com/05DawBz.png [01:34] <klaxa> looks like metadata [01:34] <klaxa> ffmpeg -i video.mp4 -f metadata metadata.txt; grep Author metadata.txt [01:34] <klaxa> or something like that [01:35] <Logicgate> klaxa, I did that earlier, there is no metadata. [01:36] <klaxa> hmm... [01:38] <llogan> you want to set the author metadata? [01:38] <Logicgate> I want to read it first then set it llogan [01:39] <Logicgate> i know how to set it with -metadata var="value" when encoding [01:39] <Logicgate> I need to read it [01:40] <llogan> please provide a sample [01:41] <Logicgate> Sample of what?? [01:41] <Logicgate> I'll send you a video [01:41] <Logicgate> Is it possible to add codecs to ffmpeg after it's compiled?? [01:41] <llogan> no [02:48] <anewuser> hi, curious, just hearing ffmpeg does GME but can't find more info [03:08] <tm512> What bottlenecks might there be that would cause a recording to drop frames seemingly randomly? I'm recording with x11grab but randomly, the video locks up and then continues at a later frame [03:08] <tm512> my cpu shouldn't be a problem for this [03:09] <tm512> Happens with x264 ultrafast -qp 0, and huffyuv [03:14] <llogan> anewuser: what's GME? [03:17] <anewuser> game music emu [03:17] <anewuser> a library to play videogame music file formats [03:17] <anewuser> a general reference would be like listening supernintendo music on computer [03:18] <anewuser> http://blargg.8bitalley.com/libs/audio.html#Game_Music_Emu [03:20] <llogan> anewuser: i'm not sure, but check this out (from a ffmpeg dev) http://gamemusic.multimedia.cx/ [03:21] <tm512> llogan: including hundreds or thousands of lines? [03:21] <tm512> nothing seems out of the ordinary [03:21] <llogan> you can trim any repeating lines [03:22] <llogan> anewuser: only problem is that i don't use the chrome spybrowser [03:23] <tm512> I'll have to redo it in a bit to get the exact output, also it's run from a script, but I can get the general command that is being run [03:23] <tm512> http://hastebin.com/raw/lumuluyalo [03:25] <llogan> anewuser: oh, i see. yes, you can --enable-libgme in ./configure. i've never used it. [03:26] <anewuser> llogan: haha, did not know about that site [03:27] <tm512> I had the idea that my HDD was at fault, but I dunno how, I can copy from /dev/zero at 100+ MB/s [03:32] <anewuser> ohhhhh [03:33] <anewuser> does that mean it's also enabled in the linux world?? [03:33] <anewuser> one tool to rule them all [03:34] <llogan> http://ffmpeg.org/ffmpeg-formats.html#libgme [03:35] <anewuser> ohhh [03:36] <anewuser> never knew it was part of the plan to add vgm files [03:36] <anewuser> ruling the world XD [03:36] <anewuser> vgmstream up next haha [05:00] <ubuntuaddicted> hello guys, i am getting a ton of errors when trying to use ffmpeg (avconv) to decode and re-encode a video stream from a device node. here's the beginning output from the terminal http://pastebin.com/Lzu9R1GW and the avconv command actually freezes and the hd-pvr stops recording by itself. why would this be? i can use cat /dev/video1 > video.ts just fine and it captures video until I hit ctrl-c. [13:47] Action: jokar hello All, How are you? How can I convert Mpg to VOB? [13:47] <jokar> Can you show me a ffmpeg command to convert mpg to vob? [13:49] <relaxed> ffmpeg -i input.mpg -map 0 -c copy output.vob [14:29] <brontosaurusrex> how would i burn srt subs to self-generated black that is correct in size and length? [15:18] <Rajat> hi [15:18] <Rajat> i need some help [15:18] <Rajat> to install ffmpeg-2.1 on rhel6 [15:19] <Rajat> hi [15:19] <Rajat> any one there [15:21] <Rajat> hi [15:59] <dccc> i'm am trying to create a mobile app that resizes an mp4 with the api. can someone give me an overview of the flow in ffmpeg that accomplishes this? or perhaps point me to documentation? [16:00] <dccc> from what i've read so far, it seems like i need to decode the file as a stream and recode it with the next size in the context. [16:00] <dccc> new size* [16:11] <Mavrik> dccc, there are examples in doc folder of ffmpeg source [17:23] <brontosaurusrex> is it possible to get length if my only input is srt soft subs? [17:25] <brontosaurusrex> like ffmpeg -i my.srt -f lavfi -i color=s=1920x1080:color=black -vf subtitles=filename=my.srt -r 25 -c:v qtrle -an out.mov < is my current cli [17:25] <brontosaurusrex> but the encode goes on forever [17:25] <klaxa> try adding -shortest [17:26] <brontosaurusrex> klaxa, tried, not working [17:26] <klaxa> hmm [17:57] <ubitux> brontosaurusrex: -vf subtitles is *not* soft sub [17:57] <ubitux> you're doing both soft and hard in your cmd [17:58] <brontosaurusrex> ubitux, i used soft only to get the lenght, but its not working anyway [17:58] <brontosaurusrex> ill have to parse subs and then use -t i guess [17:59] <ubitux> why do you need that? [17:59] <ubitux> use ffprobe to get information about a media [18:05] <dharriso> hi, using the ffmpeg api to transcode audio only streams in an MP4 container or ADTS [18:05] <brontosaurusrex> about srt as well? [18:06] <dharriso> the audio is AAC, i need to extract the AAC profile from the input stream. For MP4 i can extra the AudioSpecifcConfig from the extradata to extract this [18:06] <dharriso> but for ADTS streams the extradat is not available [18:07] <dharriso> the ADTS header has a profile but if its HE-AAC it only give AAC-LC [18:08] <dharriso> is there a way to extract this information from the AAC frame data? [18:10] <dharriso> So im looking to see if the Profile is HE-AAC or HE-AACv2, you know with the SBR details [18:11] <dharriso> one of the spec says about implicite detection checking if the sampleFrequency specified in the ADTS and the frame data differ then it can be assumed to SBR [18:11] <dharriso> is there somewhere in ffmpeg this is done that I could use as a reference [18:11] <dharriso> thanks [18:12] <brontosaurusrex> ubitux, about srt as well? [18:58] <ubitux> brontosaurusrex: yes? [19:10] <viric> hm I fail to use drawtext [19:11] <viric> I don't see any text over the output video [19:11] <brontosaurusrex> ubitux, ffmpeg doesn't seem to know the duration of the soft subtitle format like srt [19:12] <ubitux> why do you need that? [19:12] <ubitux> it makes no sense to have the "duration" of a subtitles [19:13] <viric> aha [19:13] <viric> ah got it. the default x=100,y=100 isn't very usefil [19:13] <viric> :) [19:13] <viric> x=0,y=0 I mean [19:15] <viric> can drawtext use antialiasing? [19:15] <ubitux> it uses freetype [19:15] <ubitux> so yes, it has anti aliasing [19:15] <viric> ah [19:17] <viric> right [19:17] <brontosaurusrex> ubitux, burning subs to black video [19:17] <ubitux> and how the duration would help? [19:17] <brontosaurusrex> it would stop encoding when the subtitles end [19:20] <ubitux> ffprobe -show_entries packet=pts_time,duration_time -of compact [19:20] <ubitux> try to parse this [19:20] <ubitux> like, ffprobe -show_entries packet=pts_time,duration_time -of compact | tail -n 1 [19:20] <ubitux> and do a pts_time+duration_time [19:20] <ubitux> should be enough [19:20] <brontosaurusrex> don't have ffprobe compiled for osx, would that work with ffmpeg -i ? [19:20] <ubitux> no [19:21] <ubitux> (you can try different writers of course) [19:22] <brontosaurusrex> so far i'am awk-ing the last timecode from srt and using that with ffmpeg ... -t awked [19:22] <brontosaurusrex> but seems stupid [19:22] <ubitux> just use ffprobe [19:23] <ubitux> there is no reason for not having it deployed with a traditionnal install [19:23] <brontosaurusrex> ill remember for the next time i will attempt to compile ffmpeg, thansk [19:23] <brontosaurusrex> thanks* [19:23] <ubitux> it's by default [19:25] <viric> I want to do a title in black background, then fade to the input video. I fail to get the fade working [19:26] <viric> http://sprunge.us/EVTB [19:26] <brontosaurusrex> another q: with -lavfi color=s=1920x1080:color=black [19:26] <brontosaurusrex> i'am not getting to speed [19:26] <brontosaurusrex> stuck at about 200 fps [19:26] <brontosaurusrex> is there another faster way? [19:29] <viric> the text fades out, not the black bg [19:39] <viric> damn it, the 'color' source is without alpha [19:40] <viric> with drawbox it works [19:54] <viric> how can I set the filter input pixel format, different than the filter output? [19:55] <viric> I want 'alpha' channel in the filter [20:01] <psc1963> llogan, thank u for your help! that got me started in the right direction, and I have it working with the sdp option now [20:01] <user0_> echo [20:02] <viric> I fail to achieve an alpha fade. Any idea? http://sprunge.us/eWZT [20:02] <user0_> Hi i have a lot of jpg files to convert to video, can someone help and tell me what should i put on arg -i ? (input file name) ? [20:02] <DelphiWorld> hey guys [20:02] <DelphiWorld> what's the secret of AC3/DTS audio? [20:02] <DelphiWorld> who own them? [20:05] <psc1963> does anyone know how to add in support to ffmpeg for g722.1 aka siren7? [20:07] <brontosaurusrex> DelphiWorld, dolby and dts [20:08] <brontosaurusrex> ok, got around 350 fps with some cropping, that should do for a while [20:09] <brontosaurusrex> DelphiWorld, http://en.wikipedia.org/wiki/DTS_(sound_system) and http://en.wikipedia.org/wiki/Dolby_AC-3 [20:10] <brontosaurusrex> user0_, i have a script that does renamed symlinks and push that to ffmpeg , are you on nix like system? [20:10] <brontosaurusrex> user0_, but i think ffmpeg lately upgraded that section [20:11] <DelphiWorld> thank brontosaurusrex [20:11] <DelphiWorld> and how do ffmpeg support them without license? [20:11] <DelphiWorld> just wondring [20:11] <brontosaurusrex> DelphiWorld, i let them [20:12] <DelphiWorld> brontosaurusrex: you? who's you:P [20:12] <brontosaurusrex> nah, i think this is some sort of solution with source code vs. binaries [20:12] <brontosaurusrex> but don't quote me [20:12] <brontosaurusrex> a "solution" [20:12] <DelphiWorld> ah [20:13] <DelphiWorld> got ya [20:14] <brontosaurusrex> hmm, what framerate would I need for smooth subs? would 1 be enough? lmao [20:14] <brontosaurusrex> or maybe 2? [20:14] <brontosaurusrex> fps that is [20:14] <llogan> psc1963: sounds good. but i forgot what i did. [20:15] <DelphiWorld> brontosaurusrex: maybe you know, what's dvdnav? [20:16] <brontosaurusrex> DelphiWorld, some sort of dvd library for dvd navigation rendering [20:16] <llogan> user0_: http://ffmpeg.org/faq.html#How-do-I-encode-single-pictures-into-movies_003f [20:17] <user0_> brontosaurusrex: shure i'm on nix [20:17] <user0_> llogan: ty [20:17] <llogan> also http://trac.ffmpeg.org/wiki/Create%20a%20video%20slideshow%20from%20images [20:17] <user0_> i go the last link [20:17] <user0_> but i dont understand the -i input file name format [20:17] <llogan> using "-vf fps" is recommended over -r for now due to some issues with -r [20:17] <user0_> %03d [20:17] <llogan> (for the output) [20:18] <llogan> show an example of your input file [20:18] <llogan> oh, output [20:18] <user0_> 00606E60E78E()_0_20131126170132_34511.jpg [20:18] <llogan> %03d.jpg would start with 001.jpg and go from there [20:19] <user0_> 00606E60E78E()_ -> never change [20:19] <psc1963> I was looking for a way to convert amr-wb in rtp to wav, thats what you helped me with yesterday. [20:21] <viric> hey I used a pastebin [20:21] <psc1963> now I am trying to do the same thing for 722_1 or siren7, but see no ffmpeg support for that audio codec [20:22] <brontosaurusrex> user0_, this script http://paste.debian.net/67882 is inside a droplet (on osx) and will accept folder as input [20:22] <brontosaurusrex> user0_, probably interesting from line 100 and on [20:22] <DelphiWorld> psc1963: what you're trying to do for G.722.1? [20:22] <viric> oh got it! format=argb before fade in, makes it work. fade doesn't handle yuva420p! [20:22] <llogan> i see support for g.722 but not g.722.1 [20:23] <llogan> viric: you used pastebin but ignored the output [20:23] <psc1963> take a 722.1 stream that is rcvd in rtp and convert it to a wav file [20:23] <viric> llogan: ahhhh ok [20:23] <llogan> user0_: i was confused. try using a glob pattern as shown in the trac link i gave you [20:23] <viric> sorry [20:24] <DelphiWorld> psc1963: http://www.freeswitch.org/ [20:24] <viric> in any case, argb was the key for fade to work with alpha [20:25] <psc1963> there is a libg722_1 there at freeswitch i think. do u suggest not using ffmpeg for this need? [20:25] <llogan> viric: did you use the split because the drawbox and drawtext would overwise not work with fade? [20:26] <llogan> psc1963: do you have a g.722.1 sample file? [20:26] <psc1963> there is also a libsiren thread that may be worth trying. has anyone used it? [20:26] <psc1963> yes, i have one. [20:27] <viric> llogan: I used split, because otherwise I've to manually set the color src of the same size as the input. [20:27] <viric> split + drawbox instead of color [20:27] <llogan> i see. seems to be a good workaround/lazy bonus [20:28] <viric> it's tricky... the argb thing killed me for two hours almost :) [20:28] <user0_> 00606E60E78E()_%d_%d_%d.jpg [20:28] <llogan> no [20:28] <llogan> ffmpeg -r 1 -pattern_type glob -i '*.jpg' [20:28] <user0_> No such file or directory [20:28] <llogan> except ignore that -r 1 [20:29] <user0_> kkkk [20:29] <llogan> viric: yeah, i've failed at fade a few times and then keep forgetting [20:30] <user0_> ksh: ffmpeg: Argument list too long [20:31] <user0_> but it seems working ty :) [20:31] <viric> I will draw a front picture as png, with gimp. And then, movie + drawtext + fade. Good that drawtext understands utf8! [20:33] <llogan> psc1963: please provide a sample file if possible [20:39] <psc1963> its a wire capture in pcap file format. would u need it in rtpdump dump format to look at it? [20:40] <llogan> psc1963: i'm too ignorant of the format to know [20:53] <DelphiWorld> psc1963, use freeswitch. play the stream in a conference, start recording from conference to a wav file, done [20:54] <psc1963> tx! [20:55] <llogan> or provide a sample and submit a feature request in ffmpeg and someone may implement a decoder natively or via an external library [20:56] <psc1963> will do that as well. tx again. [21:36] <Timothy_Gu> What's the difference between mov subtitle and text subtitle? [21:37] <Timothy_Gu> (See mov2textsub and text2movsub bitstream filters) [21:40] <Timothy_Gu> Seriously anyone? [22:01] <relaxed> Timothy_Gu: maybe they're stored differently in the mov container. [22:04] <relaxed> Although with most of these bitstream filters I don't see why ffmpeg can't do the right thing automagically. [22:05] <relaxed> Take for instance: -bsf:v mjpeg2jpeg [22:06] <Rabbitt> Sample footage 4k raw from a Canon C500 https://www.dropbox.com/sh/gsqjxbbabz8th5j/ZrtIZGbfFG [22:07] <relaxed> Why would anyone ever want to copy mjpeg to jpgs that can't be decoded properly? [22:07] <relaxed> It's retarded. [22:15] <Timothy_Gu> relaxed: speaking of mjpeg2jpeg, seems like it doesn't even work [22:16] <Timothy_Gu> by reading the code [22:16] <relaxed> It worked last time I needed it. [22:17] <Timothy_Gu> All the magic done in line 101-103 are in the out buffer, but the "out" buffer isn't even outputted [22:19] <relaxed> it would be trivial to test [22:20] <Timothy_Gu> You wanna do it? Not me cause I got nothing but an unrooted nexus 7 on my hand. [22:46] <dharriso> anyone who might help with AAC audio question [22:59] <viric> llogan: if I replace color=c=black by movie=a.png, fade fails again [23:00] <viric> despite setting argb [23:13] <viric> hm some pts thing I guess [23:22] <viric> grmbl [23:22] <viric> [Parsed_showinfo_2 @ 0x152ee60] n:0 pts:7194 pts_time:0.0399667 pos:15364 fmt:yuva420p sar:45/44 s:640x360 i:P iskey:0 type:B checksum:C3E08DC1 plane_checksum:[BC6C2649 CFEA068B 9011B05E 871DB080] [23:22] <viric> what relates pts and pts_time? [23:22] <viric> tb=1/25 [23:22] <viric> [Parsed_showinfo_2 @ 0x152ee60] n:1 pts:14394 pts_time:0.0799667 pos:17284 fmt:yuva420p sar:45/44 s:640x360 i:P iskey:0 type:B checksum:83AE8F83 plane_checksum:[C33F47AA 5BEC0CAA D64A8AA0 871DB080] [23:26] <llogan> dharriso: what is the question? [23:27] <llogan> viric: i'm not sure. hard to know what's going on without command and complete console output [23:27] <viric> it's showinfo on a direct MTS file [23:27] <viric> 25 fps, 50 tbr, 90k tbn, 50 tbc [23:27] <viric> I guess that's the key... the 90k thing :) [23:28] <viric> but I don't know what it is [23:28] <dharriso> llogan: Im transcoing AAC content using the API. I want to matain the AAC profile. With AAC in MP4 cotnainer I can parse out the AudioSpecificConfig in the extradata to find this out e.g. HE-AAC [23:28] <dharriso> however when the AAC is wrapped in ADTS no extra data [23:28] <dharriso> it only gives the profile as AAC-LC from the ADTS header [23:29] <dharriso> is it possible to extract this information from the AAC payload [23:29] <dharriso> mediainfo on the file says HE-AAC [23:29] <llogan> i've never used the API [23:29] <dharriso> o right [23:30] <viric> llogan: http://sprunge.us/gGXe [23:30] <Rabbitt> https://bugzilla.libav.org/show_bug.cgi?id=598 [23:31] <llogan> Rabbitt: we are FFmpeg, not libav [23:31] <Rabbitt> hmm, okay, someone did say in here yesterday that it wouldn't matter [23:32] <llogan> bullshit [23:32] <Rabbitt> I thought as much [23:32] <Rabbitt> apologies [23:32] <Rabbitt> I've read the controversy around the fork, so sincerest apologies [23:32] <llogan> no problem, but if you're using ffmpeg, and want a feature in ffmpeg, then you should use the ffmpeg bug tracker [23:33] <llogan> yes, it can be a confusing situation for users due to the hijacking of several ffmpeg related vocabulary [23:33] <dharriso> llogan; do i need to check back later and ask the same question, for API, or should i use another channel? [23:34] <llogan> dharriso: you can try the libav-user mailing list or try later. not as many api answers here unfortunately [23:34] <llogan> http://ffmpeg.org/contact.html [23:34] <llogan> for ML info [23:35] <dharriso> llogan: thanks, will do both as you suggest [23:37] <viric> llogan: any idea about the PTS not being time/TB? [23:37] <viric> time * TB [23:37] <viric> is TB = 1/framerate? or not necessarily [23:37] <viric> ? [23:44] <cbsrobot> Rabbitt: did you try http://www.libraw.org/ ? [23:44] <Rabbitt> never heard of it [23:44] <Rabbitt> so no [23:44] <cbsrobot> they seem to support the c500 since release 16 alpha [23:45] <Rabbitt> that doesn't really help much, that's only useful if you want to edit frames like they are from a camera [23:45] <Rabbitt> a DSLR [23:46] <cbsrobot> what do you want to do with it ? [23:46] <Rabbitt> not interesting to me, I want ffmpeg to stream it as video... you have no idea how much processing goes into just a single frame of raw? [23:46] <Rabbitt> it's a little insane [23:46] <Rabbitt> it's like talking about doing a timelapse of 20k pictures you manually edit each [23:47] <Rabbitt> I want to stream it into another format so that it can be worked on with say kdenlive or whatever video editor I prefer to use [23:47] <cbsrobot> Well I used dcraw (the base of libraw) to work on cr2 files a few years ago [23:48] <Rabbitt> photography workflows are insanely more single image oriented than video workflows [23:48] <cbsrobot> normally you convert the raw pictures in something editable [23:49] <Rabbitt> I use darktable these days, and they use the library, so I should be able, in theory, with the alpha version of this lib access the .rmf files, but that does not in any way help me turn a large video into something useful for a video workflow. The processing time per raw is on average 5-10 seconds... Can you imagine 100k frames in a video? [23:49] <viric> does drawtext support carriage returns? [23:50] <viric> newlines [23:50] <cbsrobot> I even had a dailies workflow for the A-Cam dII which records single cinemadng files [23:50] <cbsrobot> but sure it's a bit insane [23:50] <Rabbitt> dcraw is great for photography, but it isn't a viable tool for raw video... right now there's a huge deficit in this side of things. [23:51] <Rabbitt> ideally you want to do colour grading, white balance and what-not at any time in a video edit [23:52] <Rabbitt> only commercial software does this at the moment [23:52] <Rabbitt> and even then [23:52] <cbsrobot> dcraw converts the 14 bit raw images into 16 bit tiff files - that was what I was able to process [23:53] <cbsrobot> but I think nowadays davinci resolve can process them too [23:53] <cbsrobot> it's even free for 2k projects (if I'm not mistaken) [23:54] <cbsrobot> what software can process the c500 files ? [23:54] <Rabbitt> yeah, DaVinci does it [23:54] <Rabbitt> it can do it without any in-between processing [23:58] <Rabbitt> hmm, if it ran under Wine I'd consider using it [00:00] --- Wed Nov 27 2013