[Ffmpeg-devel-irc] ffmpeg.log.20170111

burek burek021 at gmail.com
Thu Jan 12 03:05:01 EET 2017

[00:00:23 CET] <Cr1ms0n> Hrmm how do I run ffmpeg ?
[00:00:52 CET] <Cr1ms0n> or is it all commnad line where I just reference the folder
[00:01:15 CET] <arog> yes
[00:01:20 CET] <arog> its a command line tool from what i can tell
[00:03:01 CET] <Cr1ms0n> Oh okay. I'm trying to convert this MKV into a lossless format for Vegas and then encode it for a finished product
[00:54:15 CET] <Zeranoe> Has anyone managed to build FFmpeg with VC 2005?
[00:55:02 CET] <BtbN> that seems like the most horrible idea I've heard of in a while.
[00:55:20 CET] <Zeranoe> BtbN: It's a painful experience
[01:47:48 CET] <Cr1ms0n> so i have ffmpeg installed i just type the file name and it will find it? or do I need the full extension
[01:51:42 CET] <Cr1ms0n> nvm i figured it out thanks cyah ;O
[02:29:40 CET] <mantas322> Hi guys
[02:29:53 CET] <mantas322> I have a quick cureious question semi-related to ffmpeg
[02:30:28 CET] <mantas322> hmm, nevermind i just figured it out.
[02:30:30 CET] <mantas322> thanks.
[05:13:08 CET] <wh> hi, all, how can i get PCR value in mpegts file under ffmpeg ?
[05:59:41 CET] <thebombzen> huh, I think I found a bug with hevc in mpegts
[05:59:47 CET] <thebombzen> unless mpegts doesn't support hevc
[06:00:42 CET] <thebombzen> if I have hevc in a mpegts, and I try to fastseek by putting -ss before -i, the hevc decoder barfs some errors. playing it with an avcodec video player produces garbage output
[06:00:56 CET] <thebombzen> however, if I remux to matroska with -c copy, the error disappears
[06:01:05 CET] <thebombzen> this sounds like a bug but I'm not certain
[06:06:30 CET] <thebombzen> https://hastebin.com/kihevewosa.pas
[06:09:03 CET] <thebombzen> https://imgur.com/a/0uBZU
[06:09:20 CET] <thebombzen> does this look like a bug or am I doing it wrong
[07:11:18 CET] <vinay_> hello my mobile app which is made on Gocoder which is wowza based app, that app trying to connect on rtsp://<server_ip>:<port>/<streamname>. so how can i get that stream using ffmpeg or ffserver??? any idea?
[08:34:34 CET] <alu> I've been searching for the best method of concat multiple videos together with crossfade effect and they require knowing start / end frames of videos being joined which is not practical with 3+ videos
[08:35:14 CET] <alu> for fade I just add fade in/out for each video then concat them together by making a text file then joining
[08:36:01 CET] <alu> but I dont know how to go about effeciently crossfading multiple videos, existing help answers always gives me an error even with latest compiled version of ffmpeg
[08:49:31 CET] <alu> ffmpeg -i 1.mp4 -i 2.mp4 -f lavfi -i color=black -filter_complex \ "[0:v]format=pix_fmts=yuva420p,fade=t=out:st=4:d=1:alpha=1,setpts=PTS-STARTPTS[va0];\ [1:v]format=pix_fmts=yuva420p,fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+4/TB[va1];\ [2:v]scale=960x720,trim=duration=9[over];\ [over][va0]overlay[over1];\ [over1][va1]overlay=format=yuv420[outv]" \ -vcodec libx264 -map [outv] out.mp4
[08:49:37 CET] <alu> says no matches found: [outv]
[08:54:29 CET] <alu> i think i got something to work
[10:54:26 CET] <[_T_]> Hi everyone
[15:31:25 CET] <alexspeller> Has anyone experienced ffmpeg giving the wrong resolution for webm files?
[15:31:58 CET] <alexspeller> ffprobe foo.web reports 640x480, but the video 1264x736
[15:32:21 CET] <alexspeller> (when converting with ffmpeg it's converted at 640x480 too)
[15:32:51 CET] <alexspeller> the video plays at the correct resolution in VLC and chrome, but it plays at 640x480 in firefox
[16:18:38 CET] <tommy``> hi, which gui user friendly is good with ffmpeg?
[16:18:58 CET] <__jack__> user friendly ? use cli
[16:19:32 CET] <tommy``> cli?
[16:19:42 CET] <__jack__> yes : command line interface
[16:20:05 CET] <tommy``> ah
[16:21:18 CET] <__jack__> yeah, just trollin', don't mind about me
[16:21:26 CET] <tommy``> :D
[16:23:59 CET] <DHE> maybe handbrake? problem is ffmpeg has so many features, any gui is technically limiting
[16:24:18 CET] <tommy``> DHE, handbrake is not for video?
[16:25:30 CET] <DHE> looking at the docs, I'm starting to wonder if it's actually using ffmpeg
[16:25:43 CET] <DHE> yeah never mind that
[16:26:15 CET] <tommy``> ok
[16:28:08 CET] <tommy``> this is good to find black screen? ffmpeg -i file.mkv -vf blackdetect=d=2:pix_th=0.00 -f null NUL
[16:43:04 CET] <timofonic> Hello
[16:45:22 CET] <timofonic> Anyone here using Gentoo and ffmpeg-9999? https://forums.gentoo.org/viewtopic-p-8015312.html
[17:35:18 CET] <sopparus> ffmpeg cant play hls streams with fair play right?
[17:35:27 CET] <Menion> Hi all. I'm Antonio. I'm working on fixing transcoding in tvheadend, that use libav as transcoding framwork, on RaspberryPi. Unfortunately I'm running in toruble using mpeg2_mmal decoder (valid mpeg2 license is installed)
[17:36:07 CET] <Menion> It seems that the decoded frame is corrupted/invalid, since if passed to h264_omx encoder high QR and invalid h264 stream
[17:40:36 CET] <DHE> sopparus: ffmpeg can't play encrypted streams if it can't get the keys. anything protecting the keys (mandatory cookies, client SSL certs, user authentication, or whatever else you can think of) will likely thwart it
[17:40:45 CET] <DHE> if the keys are available, it can play it
[18:05:05 CET] <sopparus> DHE, I have the keys and such, where do I read about playing those streams? I find nothing  :)
[18:18:08 CET] <DHE> sopparus: ffplay http://website.com/dir/video.m3u8  should be sufficient
[18:18:44 CET] <sopparus> its not
[18:18:57 CET] <dne202> I'm writing a script to automatically encode files into ProRes.  Right now we use Adobe Media Encoder to make our ProRes files, but I'd love to use FFMpeg since Media encoder is not scriptable.  My problem is that, in all the tests I've run with FFMpeg, I can't get it to encode nearly as fast as Adobe Media encoder.  FFMpeg takes almost twice as long.  Are there any suggested flags that could help me get a faster encode?
[18:19:40 CET] <sopparus> dont I need to add those license keys somewhere?
[18:19:44 CET] <dne202> I should clarify I can't get FFMpeg as fast in ProRes... FFMpeg flies with H264
[18:20:57 CET] <sopparus> also consoles tells ms [hls,applehttp @ 0x3b924a0] SAMPLE-AES encryption is not supported yet
[18:21:07 CET] <dne202> I'm on a MacPro Trashcan
[18:21:35 CET] <ritsuka> maybe ffmpeg prores encoder is not as optimized as the apple's one
[18:24:00 CET] <hashworks> Hi! I'm trying to use the hevc_qsv Intel Quicksync codec on my i5-6600K. When I do ffmpeg -i foo.mkv -vcodec hevc_qsv out.mkv I get "Selected ratecontrol mode is not supported by the QSV runtime. Choose a different mode." - Could someone explain what this means?
[18:25:29 CET] <dne202> @ritsuka, I think you might be right.  I was just wondering if anyone had any luck with optimising it further through some setting modification.
[18:30:05 CET] <jkqxz> hashworks:  It may mean you should select a rate control mode (add "-b:v 5M" or "-q 20" or something).  Alternatively, it may mean that hevc in your libmfx isn't working for whatever reason (not having loaded the plugin being the most obvious thing there).
[19:08:25 CET] <sopparus> DHE, any ideas on that?
[19:09:12 CET] <DHE> SAMPLE-AES encryption isn't supported, no. only full AES encryption is....
[19:09:35 CET] <DHE> and I just tested with unencrypted content. it works but seems to not handle the master playlist properly
[19:19:10 CET] <sopparus> en
[19:19:16 CET] <sopparus> unencrypted with fairplay?
[19:20:03 CET] <sopparus> ffmplay on normal m3u8 files without drm works good yes
[19:54:36 CET] <madskillz> Hi I am not able to compile , it says libass not found , if i remove that from config , it says another one not found.
[19:54:43 CET] <madskillz> I have installed all dependencies
[19:54:54 CET] <madskillz> also exported pkg-config path
[19:55:11 CET] <madskillz> i can see all pc files in the pkg-config
[19:55:24 CET] <madskillz> but ffmpeg cannot find them on compilation
[19:55:44 CET] <tdr> madskillz, what distro?  on some you need the -dev versions of the deps (so you get headers)
[19:56:09 CET] <madskillz> Actually I used zeranoe helper script , on ubuntu
[19:56:33 CET] <tdr> check the package manager for -dev / -devel versions of the codec deps
[19:56:36 CET] <madskillz> I have the .h .a files in their folders
[19:56:46 CET] <tdr> yeah .h is what it would be looking for
[19:56:52 CET] <madskillz> Its there
[19:57:00 CET] <madskillz> You want to look at the config.log ?
[19:57:05 CET] <tdr> under /usr/include/<something> ?
[19:57:41 CET] <madskillz> yes the include folder , it has the .h header files
[19:58:41 CET] <madskillz> http://pastebin.com/kUPAxjBj - the config.log
[20:01:54 CET] <tdr> vnetdb.h: No such file or directory
[20:02:04 CET] <tdr> line 7535
[20:03:16 CET] <madskillz> okay wait
[20:03:18 CET] <tdr> i686-w64-mingw32-gcc?   buikling fir 32 bit windows?
[20:03:30 CET] <madskillz> yes cross compiling
[20:04:45 CET] <madskillz> https://github.com/lattera/glibc/blob/master/resolv/netdb.h - this is missing ?
[20:05:30 CET] <madskillz> What do I do to fix it ?
[20:06:24 CET] <tdr> stuff like this too:   #error "unsatisfied condition: __MINGW64_VERSION_MAJOR < 3"
[20:07:07 CET] <tdr> other headers it also cant find
[20:07:35 CET] <madskillz> so a lot of errors
[20:07:56 CET] <tdr> yeah your build environment is not setup correctly
[20:08:08 CET] <madskillz> You can see my config , can you suggest the best way to compile ?
[20:08:18 CET] <madskillz> The script setup the toolchain.
[20:09:43 CET] <tdr> i havent built more than kernels on ubuntu
[20:10:02 CET] <tdr> binary distors are all different to compile on
[20:10:22 CET] <dzz007> Hello guys.
[20:10:54 CET] <dzz007> I am currently using ffmpeg under windows, and i want to convert mov to gif and preserve the alpha channel, how can i do this?
[20:12:06 CET] <dzz007> Anybody can help me out?
[20:15:17 CET] <BtbN> gifs do not have an actual alpha channel.
[20:16:06 CET] <dzz007> I use a software called instagiffer and it can give me a gif with alpha channel, i don't know how it did that
[20:17:23 CET] <dzz007> but the instagiffer is so slow and the quanlity is bad so i want to use ffmpeg to improve that.
[20:17:30 CET] <durandal_1707> gifs are palette
[20:19:07 CET] <dzz007> Like this file: http://personal.2011ysyb.com/Temporary/Shadow/Loading.gif
[20:19:08 CET] <BtbN> All gifs can do is set one color in their palete to be transparent.
[20:19:31 CET] <dzz007> How to set that color in ffmpeg?
[20:21:26 CET] <dzz007> it's so strange since if i open it under IE or Chrome it seems it has a alpha channel.
[20:24:18 CET] <hamdjan> hi i want to cut out two parts of an mp3 file. should i simply cut the mp3 by running -ss -to twice and then concantenate the pieces to one mp3 or is there a cleverer approach?
[21:51:31 CET] <arog> is it possible to call ffmpeg and block until it finishes?
[21:52:05 CET] <arog> i have 2 system() calls where the first is to do ffmpeg -f concat  -i myfile.txt -c copy output.mp4   followed by removing all the image files that were set in myfile.txt
[21:52:08 CET] <alexspeller> arog: what command are you using where that doesn't happen?
[21:52:13 CET] <arog> however it looks like the first system call returns immediately
[21:52:44 CET] <arog> alexspeller:  http://pastebin.com/HT7JBVbz
[21:53:03 CET] <arog> in my logs I see: Time to process [ 23540 ] images : 58 seconds Finished JPG Generation. Generating MP4... Finished MP4 Generation. Cleaning up. ffmpeg version 2.8.10-0ubuntu0.16.04.1 Copyright (c) 2000-2016 the FFmpeg developers   built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609   configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --in
[21:53:16 CET] <arog> weird right
[21:53:36 CET] <alexspeller> are you sure it didn't just fail?
[21:54:22 CET] <arog> yes because it takes about 2 minutes to generate the mp4
[21:54:29 CET] <arog> and the ffmpeg logging follows that
[21:54:52 CET] <arog> hold on pasting
[21:55:01 CET] <arog> http://pastebin.com/M2Mk3vAB
[21:56:52 CET] <alexspeller> arog: where is that logging from?
[21:57:01 CET] <alexspeller> what happens when you run the command on the command line?
[22:01:14 CET] <arog> in the command line is fine
[22:01:23 CET] <arog> but it looks like some reason ffmpeg returns very quickly
[22:01:33 CET] <arog> i wonder if it is because im doing the piping
[22:01:40 CET] <arog> or redirecting the output
[22:06:19 CET] <arog> http://www.cplusplus.com/forum/unices/35777/
[22:06:20 CET] <arog> tada
[22:11:41 CET] <olgson> Hello all. I've problem with below command:
[22:11:41 CET] <olgson> ffmpeg -i audio.mp3 -loop 1 -i image.jpg -pix_fmt yuv420p -map 1:v -map 0:a output.mp4
[22:11:41 CET] <olgson> It freezes on last frame. Any idea how to stop video generation? After I manually stop it [q] video works just fine.
[22:20:21 CET] <arog> do you guys know what this means -- [mp4 @ 0x1b2fb40] Non-monotonous DTS in output stream 0:0; previous: 10036736, current: 10036736; changing to 10036737. This may result in incorrect timestamps in the output file. [mjpeg @ 0x1b2b540] Changeing bps to 8
[22:20:28 CET] <arog> i am using concat and have different durations in there
[22:20:40 CET] <arog> so file image1.jpg duration X file image2.jpg duration Y
[00:00:00 CET] --- Thu Jan 12 2017

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