[Ffmpeg-devel-irc] ffmpeg.log.20150419

[burek]

[00:42:46 CEST] <Prelude2004c> http://pastebin.ca/2976352
[00:42:56 CEST] <Prelude2004c> hey guys.. can you tell me why those errors would be coming through
[00:43:03 CEST] <Prelude2004c> i am getting the input form a local UDP port
[00:43:25 CEST] <Prelude2004c> there is no congestion.. any way to turn the packets from source to TCP with ffmpeg without transcoding?
[00:43:36 CEST] <Prelude2004c> i don't have the house power on the other server so i am trying to just forward the packets
[00:45:47 CEST] <klaxa> you can use http if you are using a single client and a single server
[00:46:31 CEST] <klaxa> Prelude2004c: https://ffmpeg.org/ffmpeg-all.html#http
[00:46:35 CEST] <klaxa> see: listen option
[00:47:47 CEST] <klaxa> or tcp: https://ffmpeg.org/ffmpeg-all.html#tcp
[01:49:42 CEST] <proshot> question, i compiled ffmpeg on a armv7 system, should i enable -mfpu=neon for neon to be detected
[02:26:33 CEST] <sine_> whats the current syntax to ignore and leave out the video container/codec
[02:26:40 CEST] <sine_> used to be -vn
[02:26:50 CEST] <c_14> still is
[02:27:07 CEST] <sine_> oh, ok.
[02:30:23 CEST] <sine_> how do i get it to use all the cores of the puc
[02:30:25 CEST] <sine_> cpu
[02:31:56 CEST] <c_14> -threads 0 or so usually
[02:36:10 CEST] <sine_> whats the default
[02:36:24 CEST] <c_14> Depends on the encoder
[02:36:24 CEST] <sine_> -threads 0 i assume means use as many as available
[02:36:57 CEST] <c_14> afaik -threads 0 means use fancy magic to try and saturate the cpu
[06:11:16 CEST] <fling> Is multiple framerates supported formultiangle?
[06:30:24 CEST] <Prelude2004c> hey guys.. looking at a ts file.. is there some way to see all the settings that constrcutred that file ? eg.. coder 1 or yadif on or off.. etc etc
[06:30:27 CEST] <Prelude2004c> is there some way to see it
[06:45:31 CEST] <jcastle> ffprobe?
[06:45:42 CEST] <jcastle> It dumps the stream info.
[07:31:28 CEST] <pjunkie> I'm trying to cut a chunk of a file while re-encoding from mpeg2 to h264, using -ss and -to, with both specified after the input filename.
[07:32:01 CEST] <pjunkie> from what I can tell from the docs and from what I can find on Google, putting -ss after the input filename instead of before (as long as you're not using copy mode) should cut exactly at that timestamp
[07:32:17 CEST] <pjunkie> but in trying it, it seems to still be cutting at the nearest previous keyframe instead
[07:33:20 CEST] <pjunkie> is it really supposed to be frame-accurate and I'm doing something wrong (in which case what info can I provide to help debug), or am I just out of luck?
[07:33:46 CEST] <pjunkie> it's version 2.6.2 self-compiled running on CentOS 7
[08:38:02 CEST] <jookiyaya> what happens if you have 5.1 surround audio on  2.0 system/speakers
[09:22:03 CEST] <rkromer> jookiyaya: My guess is that you are not going to be satisfied with a static downmix, because often this does overrule what the creator intended.
[10:27:52 CEST] <enigma> i am having trouble muxing H264 bitstream and ADTS AAC streams together into FLV
[10:28:52 CEST] <enigma> If i pack H264 bitstream (source is hardware encoder) into FLV , it plays fine with proper duration and bitrate. But when I mux audio along , the bitrate and duration go all wrong and on the playback, I only hear the audio. The video gets stuck on first frame
[10:30:58 CEST] <enigma> here is my muxing code : http://pastebin.com/C6bYqtsA
[11:46:44 CEST] <jookiyaya> i found a huge bug with .mkv
[11:46:55 CEST] <jookiyaya> who do i report it to?
[12:22:46 CEST] <bencc1> can ffmpeg application written in C mix live streams of audio/video conference where streams are added and remove dynamically?
[12:22:58 CEST] <bencc1> can it handle queues, synching and buffering for me?
[12:49:14 CEST] <tt99> anyone here who is good at programming and has knowledge of vbr mp3 headers, please msg me
[13:11:38 CEST] <seasc> tt99, you might have better chances to ask straight
[13:18:20 CEST] <tt99> well its about recording in vbr mp3 and edit afterwards to get the mp3 nicely but than the vbr mp3 header gets fucked. Instead of razorlaming mp3's (re-encode) I am looking for a tool to fix the vbr header. Its possible and I think I have the codecs. Need someone to built and check
[13:33:35 CEST] <seasc> How to fix a VBR (Variable Bit Rate)? Its been encoded to switch dynamicly the bitrates where required / possible. Its not really something you can EDIT (afaik)..
[13:37:31 CEST] <seasc> By dynamicly i mean during encoding, not afterwards, obviously. @ tt99
[13:37:53 CEST] <jookiyaya> what happens if you have 5.1 surround audio on  2.0 system/speakers
[13:39:51 CEST] <seasc> usualy, you hear only either front or backsides, or just left or just right, depends on the system / config
[13:41:02 CEST] <jcastle> https://trac.ffmpeg.org/wiki/AudioChannelManipulation#a5.1stereo
[13:41:12 CEST] <seasc> i would suggest to downcode the audio (-ac 2) but copy the videostream (-c:v copy) (remains better quality)
[14:17:37 CEST] <Guest61567> hi
[14:18:40 CEST] <Guest61567> my ffmpeg hang for [https @ 0x9d6d000] header='Server: gvs 1.0' [https @ 0x9d6d000] header='' Why?
[14:19:38 CEST] <Guest61567> it production server http://pastebin.com/UAf19thz
[14:22:14 CEST] <Guest61567> it http://pastebin.com/ddfgN7ai  local host, good job. Why on development server doesn not job?
[14:22:48 CEST] <klaxa> how long did you wait?
[14:22:48 CEST] <klaxa> not sure if -ss is passed to http as a range-request
[14:22:53 CEST] <klaxa> can you monitor network throughput? it might be downloading the file and trying to skip 2000 seconds
[14:28:44 CEST] <Guest61567> klaxa, wait slowly
[14:29:01 CEST] <Guest61567> klaxa, for local host it job good
[14:29:26 CEST] <Guest61567> On productions server doesn not job :(
[14:29:56 CEST] <klaxa> i can see that, but can you answer my question? and monitor your network throughput?
[14:30:39 CEST] <Guest61567> klaxa, how it make?
[14:30:45 CEST] <klaxa> oh wait, you are running the command on two different computers but are trying to get the same data
[14:30:48 CEST] <klaxa> now i see what you want
[14:31:02 CEST] <Guest61567> yes
[14:31:06 CEST] <Guest61567> thanks
[14:31:08 CEST] <klaxa> you can use a tool like iftop or bwm-ng or nload or just watch ifconfig
[14:31:31 CEST] <Guest61567> ifconfig i use
[14:31:51 CEST] <Guest61567> run ifconfig?
[14:31:54 CEST] <klaxa> run it once before you run the command
[14:33:13 CEST] <klaxa> note down the data received (rx) so far
[14:33:15 CEST] <klaxa> run your ffmpeg command
[14:33:16 CEST] <klaxa> and then check ifconfig again to see if it downloaded a lot of data
[14:33:17 CEST] <klaxa> it would actually be easier if you could just check the "live bandwith" with one of the three other tools i mentioned
[14:33:29 CEST] <Guest61567> klaxa, but local host job fast, very fast and speed low
[14:34:46 CEST] <klaxa> as a test, can you skip the -ss 2000 parameter?
[14:34:54 CEST] <klaxa> and maybe add -t 10 or something
[14:35:29 CEST] <Guest61567> before RX packets:1240579 errors:0 dropped:70936 overruns:0 frame:0 after RX packets:1253189 errors:0 dropped:70960 overruns:0 frame:0
[14:36:31 CEST] <klaxa> was that on your local machine or on the remote machine?
[14:36:40 CEST] <Guest61567> remote
[14:36:42 CEST] <klaxa> and did the command finish or did you abort it?
[14:37:05 CEST] <klaxa> can you try skipping -ss 2000?
[14:37:52 CEST] <klaxa> from the http header you can tell that ffmpeg is downloading the whole file
[14:38:57 CEST] <Guest61567> klaxa, it sometimes jobe
[14:38:58 CEST] <Guest61567> d
[14:39:51 CEST] <Guest61567> -ss 10 , but hang
[14:40:19 CEST] <klaxa> for how long?
[14:40:21 CEST] <klaxa> forever?
[14:40:32 CEST] <semeion> what parameter put ffplay on top of all windows in desktop? I have tried -video-on-top
[14:41:03 CEST] <klaxa> semeion: i'm pretty sure that's window-manager dependent
[14:41:45 CEST] <Guest61567> klaxa, forever
[14:42:10 CEST] <semeion> yes, i know, but ffplay don´t make it?
[14:42:35 CEST] <klaxa> how long did your forever last? and like i said, can you maybe monitor your network throughput?
[14:42:41 CEST] <semeion> i am starting with aaplay now
[14:43:23 CEST] <semeion> he have a usefull -fs to put fullscreen
[14:43:28 CEST] <Guest61567> klaxa, still
[14:44:11 CEST] <Guest61567> klaxa, install iftop
[14:45:07 CEST] <Guest61567> klaxa, installed and runed
[14:51:10 CEST] <klaxa> does iftop display traffic when you run the ffmpeg command?
[14:53:25 CEST] <Guest61567> klaxa, show mbites
[14:53:55 CEST] <Guest61567> increasing
[14:54:03 CEST] <klaxa> sorry battery is dying
[14:54:03 CEST] <klaxa> gotta go
[14:54:56 CEST] <Guest61567> klaxa, what me make?
[14:57:07 CEST] <Guest61567>  klaxa, what me make?
[15:01:26 CEST] <Guest23670> klaxa, for local host down 5mb and succed job
[15:25:30 CEST] <Guest23670> klaxa, you here?
[17:07:38 CEST] <shevy> on an .avi file I have this
[17:07:40 CEST] <shevy> Stream #0:0: Video: mpeg4 (Simple Profile) (XVID / 0x44495658)
[17:08:00 CEST] <shevy> is this now a mpeg4 file or an xvid .avi? or is that both? I am not quite familiar with the term mpeg4 there
[17:08:26 CEST] <JEEBsv> xvid is an encoder that produces video adhering to the MPEG-4 Part 2 standard
[17:08:38 CEST] <JEEBsv> MPEG-4 has like 30 parts by now
[17:09:14 CEST] <JEEBsv> so it is probably AVI if you say so container-wise, and that container contains an MPEG-4 Part 2 track with the track identifier "XVID"
[17:11:49 CEST] <shevy> hmm
[17:12:06 CEST] <JEEBsv> the container/whatever is listed before that as input format or whatever
[17:12:31 CEST] <JEEBsv> and yes, the "mpeg4" naming inside libavcodec is by now kind of vague, yes
[17:12:44 CEST] <JEEBsv> but that's the name for mpeg-4 part 2 inside lavc
[17:12:52 CEST] <JEEBsv> (because there wasn't anything else back then)
[17:13:35 CEST] <shevy> I am still a bit confused
[17:13:43 CEST] <shevy> is h264 also a mpeg4 format?
[17:14:00 CEST] <JEEBsv> yes, AVC (that's the ISO/IEC name) is mpeg-4 part 10
[17:14:05 CEST] <shevy> aaah ok
[17:14:15 CEST] <shevy> that makes a lot more sense to me then, thanks JEEB__
[17:14:21 CEST] <shevy> erm JEEBsv ... too many jeebs...
[17:14:35 CEST] <JEEBsv> part 12 is the new specification for "mp4"
[17:14:43 CEST] <JEEBsv> part 15 is how you put AVC and HEVC into part 12 :D
[17:15:07 CEST] <JEEBsv> for HEVC they actually decided to make a new group of formats
[17:15:09 CEST] <JEEBsv> MPEG-H
[17:15:34 CEST] <JEEBsv> which is kind of understandable since you had like 30 of MPEG-4 things
[17:15:35 CEST] <shevy> oh man
[17:15:39 CEST] <shevy> all those formats
[17:16:10 CEST] <shevy> yeah 30... it'll get better https://xkcd.com/927/
[17:16:51 CEST] <JEEBsv> I need to find the page that lists all of the multimedia related MPEG groups and their specs
[17:17:35 CEST] <opl> hello?
[17:18:08 CEST] <JEEBsv> https://www.itscj.ipsj.or.jp/sc29/29w42911.htm
[17:18:09 CEST] <JEEBsv> ah
[17:18:11 CEST] <JEEBsv> here we go
[17:18:50 CEST] <opl> i want to save an rtmp stream from vaughnlive to file, but the stream cuts after exactly after 8 seconds with error "rtmp server requested close"
[17:20:10 CEST] <Guest23670> hi all, help me?
[17:21:54 CEST] <Guest23670> it remote server http://pastebin.com/UAf19thz and it http://pastebin.com/ddfgN7 local server. On remote server does not job. What me make?
[17:41:50 CEST] <opl> anyone active?
[20:58:56 CEST] <Fyr> guys, what container is used for opus?
[20:59:36 CEST] <Polarwindz> I need some help please :)
[21:00:21 CEST] <Polarwindz> I was wondering how to burn in subtitles using mpv and ffmpeg
[21:02:21 CEST] <rkromer> Fyr: ogg for sure; I guess Matroska not yet
[21:02:35 CEST] <Fyr> thanks
[21:03:12 CEST] <c_14> Polarwindz: https://trac.ffmpeg.org/wiki/HowToBurnSubtitlesIntoVideo
[21:03:44 CEST] <Polarwindz> Does it keep the fonts/style of the subs?
[21:03:59 CEST] <c_14> If you use the subtitles filter with the mkv as input, yes.
[21:04:25 CEST] <Polarwindz> which is? I use vsfilter and avisynth with megui.
[21:04:31 CEST] <Polarwindz> My friends needs help so
[21:05:12 CEST] <c_14> The first one listed on that site I linked.
[21:05:35 CEST] <Polarwindz> Thank you, I heard that mpv with ffmpeg can keep the fonts/style of the subtitles
[21:07:06 CEST] <llogan> Fyr: .opus
[21:07:29 CEST] <Fyr> llogan, I couldn't find anything about this format.
[21:07:54 CEST] <Fyr> I wanted to know if it keeps pictures and id3v2 tags.
[21:40:50 CEST] <llogan> Fyr: i don't know. doesn't seem like the ffmpeg implementation does (you should doublecheck though...i was lazy)
[21:40:55 CEST] <llogan> see https://tools.ietf.org/html/draft-ietf-codec-oggopus-06
[21:41:25 CEST] <Fyr> yep
[21:41:26 CEST] <Fyr> =(
[21:41:55 CEST] <llogan> it wouldn't "keep" tags as id3v2 but ideally convert them to Vorbis comment.
[21:42:52 CEST] <llogan> but album art is currently problematic with ffmpeg (at least with things that should use vorbis comment)
[23:01:37 CEST] <t4nk028> hi
[23:05:42 CEST] <t4nk028> someone help me with ffmpeg?
[23:37:45 CEST] <sine> c_14: are you here fella
[23:38:06 CEST] <c_14> yeah, why?
[23:38:21 CEST] <Guest88130> well, your normally good for a random question or two :D
[23:40:02 CEST] <sine22> im no pro with ffmpeg but im learning bits as i need them. I have a few random clips of video of various framerates. home videos nothing special, I want them all to be 25fps. is there a way of converting them easily using the same video codec, sort of like videokeep but change framerate
[23:41:12 CEST] <c_14> You can do it with a short script in any scripting language really. Just ffprobe the input, check what codec it is and then encode to that.
[23:42:26 CEST] <sine22> ffmpeg -i clip.mp4 to check ?
[23:42:44 CEST] <sine22> i have not used ffprobe
[23:42:57 CEST] <c_14> ffprobe is usually better because you can change the output format so it's easier to parse; but that'll work as well
[23:55:25 CEST] <sine22> how do i set the fps
[23:55:44 CEST] <c_14> -vf fps=25
[23:55:51 CEST] <sine22> I am using -c:v libx264 -crf 28
[23:56:05 CEST] <sine22> I am using -c:v libx264 -crf 28 -vf fps=25
[23:56:52 CEST] <sine22> will that convert 30fps to 25fps so that it fits within the same timespace
[23:57:01 CEST] <c_14> should
[23:57:44 CEST] <sine22> ok trying that out. cheers
[00:00:00 CEST] --- Mon Apr 20 2015