[Ffmpeg-devel-irc] ffmpeg.log.20141029

[burek]

[00:00] <deivor> I'm currently trying to record from a camera and microphone (linux) both devices have different "open" times, which means that there's a "buffer" of frames from the video at the beginning
[00:00] <deivor> I've set the FPS to 15, but there's a "buffer" of images, which means that the output is at, say, 50 fps for 2 seconds, 40fps for 2 seconds ... and gets closer and closer to the 15fps over time
[00:01] <deivor> I'm not really sure how to explain
[00:02] <voip__> actualy am not tryng to record file i need stream to 2 IP's, i see strange bitrate=N/A in ststistics
[00:02] <deivor> My output is something like this : http://pastebin.com/P1FFwi5U
[00:03] <deivor> yes voip__ but the idea is that you rule out problems
[00:03] <deivor> if you output to one file and it works, then your command is "OK"
[00:03] <deivor> then you test with 2 files, to test if the output command is ok
[00:03] <deivor> and if that works, the rtmp servers are wrong
[00:03] <voip__> right
[00:04] <deivor> also, (not necessary) compile ffmpeg with fdk_aac support (you get better sound with lower cpu usage)
[00:09] <voip__> deivor, actualy i am using static compiled ffmpegs
[00:11] <deivor> It's not necessary to do it, and most likely a pain to compile if you are on windows
[00:11] <deivor> (I don't know if you are on windows or not)
[00:11] <voip__> aa m on linux
[00:11] <deivor> k
[00:12] <voip__> i tryed to write to files instead of IP's. Recorded files are ok on vlc, but strange ststistics is same frame= 1648 fps= 25 q=-1.0 Lsize=N/A time=00:01:06.15 bitrate=N/A dup=11 drop=0
[00:12] <voip__> btrate n/a
[00:13] <voip__> actualy i need stream to 2 wowza servers, audio on servers is good, but no video
[00:16] <deivor> What happens if you stream to only 1 wowza server?
[00:27] <voip__> deivor, with 1 server -f flv rtmp://ServerA or ServerB everything is OK. Problem comes when I trying to send 2 servers like: -f tee -map 0:v -map 0:a  "[f=flv]rtmp://ServerA|[f=flv]rtmp://SeverB"
[00:28] <deivor> what happens if you try with a piped process ?
[00:29] <deivor> https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs
[00:31] <voip__> is it will double cpu ussage ?
[00:35] <deivor> nope
[00:35] <deivor> it will add a little bit of overhead as you have two ffmpeg processes but it's almost nothing
[00:38] <voip__> :)
[00:39] <voip__> can you please help me covert piped command: ffmpeg/ffmpeg -i http://Source -preset fast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 96k -vcodec libx264 -b:v 900k -f tee -map 0:v -map 0:a  "[f=flv]rtmp://ServerA|[f=flv]rtmp://ServerB"
[00:40] <voip__> I just tryed but recieve eror -c copy is not recognized
[00:46] <deivor> ffmpeg/ffmpeg -i http://Source -preset fast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 96k -vcodec libx264 -b:v 900k -f mpegts | ffmpeg/ffmpeg -f fmpegts -i - -c copy -f flv "rtmp://ServerA" -c copy -f flv "rtmp://ServerB"
[00:47] <voip__> thank you !
[00:50] <deivor> does it work now?
[00:52] <deivor> I'll be back in 45 minutes or so
[00:52] <voip__> no :)  At least one output file must be specified
[00:52] <voip__> np
[00:54] <deivor> oh
[00:54] <deivor> ffmpeg/ffmpeg -i http://Source -preset fast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 96k -vcodec libx264 -b:v 900k -f mpegts - | ffmpeg/ffmpeg -f fmpegts -i - -c copy -f flv "rtmp://ServerA" -c copy -f flv "rtmp://ServerB"
[00:54] <deivor> dash at the end of the first process
[00:54] <deivor> now i'm gone
[00:54] <voip__> i removed dash :)
[00:54] <voip__> ok np we will talk tmororow :)
[01:13] <voip__> guys, what mean : Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
[01:13] <voip__> ?
[01:32] <deivor> I'm back
[01:33] <deivor> change your parameters as the error tells you to
[01:52] <jellosea> hello, how do i get CBR for vp8? ive tried two pass but it doesnt give me CBR
[01:57] <llogan> jellosea: why do you want CBR?
[01:57] <llogan> or maybe i should ask why do you want vp8?
[01:58] <deivor> if you can go vp9 / x264
[01:58] <llogan> vp9 is too slow to encode for sane people
[02:01] <jellosea> no have to use vp8
[02:01] <jellosea> for my application
[02:01] <jellosea> llogan: why do i need CBR? because i need it
[02:01] <jellosea> for my application
[02:01] <jellosea> i need to create a file with a specifc exact bitrate
[02:05] <llogan> jellosea: then you'll have to read this http://www.webmproject.org/docs/encoder-parameters/
[02:06] <llogan> map the options to the libvpx avoptions by looking at 'ffmpeg -h encoder=libvpx'
[02:06] <llogan> also https://trac.ffmpeg.org/wiki/Encode/VP8#ConstantBitrate
[02:06] <jellosea> i did
[02:06] <jellosea> the shit dont work
[02:06] <jellosea> i read all dat shit
[02:07] <deivor> Is there a specific signal to use for killing ffmpeg? So it closes the current stream correctly
[02:07] <deivor> I'm running pkill atm
[02:10] <llogan> jellosea: if you think it's a problem specific to libvpx then you'll have to ask in #vp8 or their mailing list webm-discuss
[02:11] <jellosea> well theres no --end-usage in ffmpeg
[02:11] <jellosea> but its in the webm encoder
[02:11] <jellosea> and end-usage in webm says its for cbr
[02:11] <jellosea> however ffmpegs instructions for cbr doesnt work
[02:13] <jellosea> and im using 2 pass on top of this shit
[02:13] <jellosea> how is it giving me really off bitrates with two pass
[02:15] <llogan> the wiki article is from other users. it may not be correct.
[02:15] <jellosea> whats -g for ffmpeg?
[02:17] <llogan> group of pictures
[02:17] <jellosea> a few other people seem to have this problem
[02:17] <jellosea> but there seems to be no real answer
[02:17] <llogan> does it work the way you want using vpxenc?
[02:20] <jellosea> what is 3pass
[02:20] <jellosea> i havent used vpxenc
[02:20] <jellosea> will a 3rd pass help me
[02:20] <llogan> 3 pass is an alias for "a waste of time"
[02:20] <jellosea> ok
[02:21] <jellosea> does the K have to be captialized
[02:21] <llogan> if vpxenc doesn't create what you want then the problem is probably not with ffmpeg
[02:21] <jellosea> -bitrate:v 250K
[02:21] <llogan> no, don't capitalize
[02:21] <jellosea> ok i didnt
[02:21] <llogan> -b:v 250k
[02:21] <jellosea> yea
[02:22] <jellosea> well with -loglevel debug it seems that
[02:23] <jellosea> libpvx seems to be receiveng cbr mode
[02:23] <jellosea> but this bitch wont output cbr
[02:25] <deivor> llogan, anything on 'correctly' killing ffmpeg? (for example, ffmpeg will produce a 'corrupt' file if killed when encoding mp4 )
[02:28] <llogan> deivor: how are you currently doing it that makes the corrupt output?
[02:29] <deivor> It doesn't, yet (I'm making a web-remote for live-streaming)
[02:29] <deivor> I'm just running pkill, but I don't know if it'll mess up the RTMP stream
[02:31] <llogan> i can't duplicate the issue using pkill if outputting mp4
[02:35] <relaxed> deivor: try, killall -INT ffmpeg
[02:38] <deivor> llogan: If you start transcoding certain codecs and ctrl-c, you'll get a 'broken video' (easy to fix), whereas if you hit 'q' the video stops at the same place but works
[02:38] <deivor> that's what I mean
[02:38] <deivor> relaxed: thanks I'll try it
[02:39] <llogan> unable to duplicate
[02:41] <relaxed> llogan: I think it happens when the output container is mp4
[02:42] <llogan> that's what i tried
[02:44] <relaxed> yeah, pkill works here too
[03:24] <nezZario> Hi folks
[03:29] <deivor> I'm trying to get www-data to execute ffmpeg as another user but won't give me access to alsa.. is this ffmpeg's fault?
[03:30] <deivor> running as user "curso" I get my script running wonderfully
[03:30] <deivor> running as www-data with correct sudo permissions: sudo -u curso script
[03:30] <deivor> ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_OPEN failed : Invalid argument(22)
[03:30] <deivor> [alsa @ 0x1669510] cannot set parameters (Invalid argument)
[03:30] <deivor> btheadset: Input/output error
[03:30] <deivor> Should these permissions be handled by ffmpeg or not? (If not, I'll have to check alsa/bluetoothd)
[03:35] <deivor> nevermind, I had a stray screen blocking access
[04:24] <nezZario> Guys
[04:24] <nezZario> How can I convert .mod to .flv or .mp4?
[04:32] <llogan> nezZario: ffmpeg -i input.mod output.mp4
[05:09] <jellosea> does the order of arguments matter in ffmpeg
[05:19] <llogan> jellosea: yes http://ffmpeg.org/ffmpeg.html#Synopsis
[05:22] <nezZario> hmm
[05:22] <jellosea> are things like sn and an input file options
[05:22] <nezZario> Well let me ask this, .. what would be a good 'something' (heck, I'd go for a book if it's <$20) to teach me about codecs/containers/video/things I'll encounter in ffmpeg?
[05:23] <jellosea> lol
[05:23] <nezZario> I'm pretty lost.. I did some converting from mod to flv (no idea what codecs?) .. when I re-play it in flv, the quality is pretty decent in the flv but the video is literally a little smaller even though VLC player says they're both 720x480
[05:23] <jellosea> mod? do you mean mov
[05:24] <nezZario> no, the file is ".mod" .. "JVC .mod format" or something
[05:24] <jellosea> llogan: is -passlogfile video_name.log file?
[05:24] <jellosea> llogan: fine rather
[05:24] <jellosea> is that how i use a unique two pass log file name
[05:27] <llogan> nezZario: https://trac.ffmpeg.org/wiki/Encode/H.264
[05:28] <llogan> jellosea: -sn and -an are output options. see the documentation. it will tell you if the option is global, input and/or output.
[05:29] <llogan> http://ffmpeg.org/ffmpeg.html
[05:29] <jellosea> oh ok
[05:29] <nezZario> llogan: any idea how I check if my ffmpeg is compiled with h264 support? ( I don't think it is, everytime I tried it said invalid encoder: ... or something along those lines)
[05:30] <jellosea> so what are generic options
[05:30] <jellosea> just type ffmpeg
[05:30] <llogan> nezZario: run "ffmpeg" the console output. look for "--enable-libx264"
[05:30] <jellosea> llogan: is generic global
[05:30] <llogan> i don't know of an option named generic
[05:31] <jellosea> no i mean in the documentation
[05:31] <jellosea> for example -loglevel
[05:31] <jellosea> it doesnt say if its global input or output
[05:33] <llogan> i guess they don't all say, but i believe it is considered a global option
[05:36] <jellosea> ok
[05:44] <jellosea> llogan: what should i set -bufsize if i want strict CBR
[05:55] <relaxed> why do you need/want cbr?
[05:57] <jellosea> not relevant
[06:00] <relaxed> jellosea: https://trac.ffmpeg.org/wiki/Encode/H.264
[06:00] <jellosea> im not even using h264
[06:00] <jellosea> also that shit dont work
[06:03] <jellosea> https://gist.github.com/anonymous/a6378ef3d7e4f8baf552
[06:05] <relaxed> please reread fflogger's message
[06:11] <jellosea> https://gist.github.com/anonymous/38596fe82b0518589471
[06:13] <relaxed> and you're issue is you think it's not CBR?
[06:25] <deivor> Hi, anyone up?
[06:29] <jellosea> relaxed yes it is not CBR
[06:29] <jellosea> i ask for the bitrate to be 250k
[06:30] <jellosea> and the output is like 500k
[06:38] <deivor> I have a camera that provides constant FPS, but ffmpeg is giving me 1 fps extra, which makes the video drift from the audio over time
[06:38] <deivor> I have ffmpeg -framerate 20 -r 20 -i - [...] -vsync drop -r 20 -async 1 OUTPUT
[06:39] <deivor> that's the relevant part, at least
[06:40] <jellosea> so relaxed you have anythign to say
[06:56] <relaxed> jellosea: how did you verify it's not CBR?
[06:59] <jellosea> relaxed: its not hitting my target bitrate
[06:59] <jellosea> how do i get it to hit my target bitrate
[07:00] <jellosea> Bit rate                                 : 435 Kbps
[07:00] <jellosea> in mediainfo
[07:00] <relaxed> did you calculate this from the ouput's size or are you just guessing?
[07:00] <jellosea> for video
[07:00] <jellosea> mediainfo
[07:00] <deivor> ffprobe ?
[07:00] <relaxed> mediainfo is wrong quite a bit
[07:02] <jellosea> its not wrong
[07:02] <jellosea> based on the filesize
[07:02] <jellosea> and based on ffmpegs output
[07:03] <jellosea> so you have no info
[07:08] <deivor> Does your output have audio? Are you sure you are comparing audio+video bitrates (and you have set them correctly on the command) ?
[07:12] <jellosea> yes
[07:12] <jellosea> yes i am
[07:12] <jellosea> jesus
[07:12] <jellosea> no one is giving me any help
[07:12] <jellosea> fucking stupid ass advice
[07:13] <relaxed> what's the output's size in MB?
[07:13] <jellosea> 14.6 MB
[07:13] <jellosea> this is retarded
[07:13] <jellosea> all you are gonna ask me is if ithe bitrate is right
[07:13] <jellosea> instead of finding out why the bitrate is off
[07:14] <jellosea> if you dont know why the bitrate will be off then just say so
[07:14] <jellosea> instead of trying to find out that the bitrate is actually right
[07:18] <relaxed> we're not paid to sit here and provide you with real-time support, so why don't you develop some patience
[07:29] <jellosea> why are you wasting my time if you dont know what the problem is
[07:30] <jellosea> just say you dont know instead of
[07:30] <jellosea> paste the log
[07:30] <jellosea> paste this
[07:30] <jellosea> why do you want cbr
[07:30] <jellosea> why do you want to encode video
[07:30] <jellosea> maybe you should read a book
[07:30] <jellosea> like wtf
[07:31] <deivor> relaxed: do you know if I can override the image PTS with constant PTS? I'm getting just a little bit over the fps I should from the camera, and over time it goes out of sync
[07:34] <relaxed> deivor: pastebin the command and output so i can see what's going on.
[07:37] <deivor> http://pastebin.com/mMXy30dr
[07:38] <deivor> the input is supposed to be 20fps, it hovers at about 20.3 (at the moment I've the command with -r 20.3) but I'm going to use in sessions about 2 hours long, so a small drift is huge
[07:40] <deivor> So I'm thinking dropping the PTS and forcing it to spit 20 frames per second with correct PTS should do it (if fps > 20, drop, if fps < 20 duplicate)
[07:43] <relaxed> instead of -r 20 use -framerate 25
[07:44] <relaxed> remove the follow -r -vsync and -async
[07:44] <relaxed> following*
[07:44] <deivor> framerate 25 for output or input?
[07:45] <relaxed> -framerate applies to the input
[07:45] <deivor> my input is fixed at "20"fps, why should I use -framerate 25? (isn't framerate used to 'ask' for a certain framerate?)
[07:46] <relaxed> I'm going by "Stream #0:0: Video: h264 (High), yuv420p, 1280x720, 25 tbr, 1200k tbn, 50 tbc"
[07:47] <relaxed> but first off, start with a slimmed down command and it encode it to a local file
[07:48] <deivor> The drift problem is from the camera
[07:48] <relaxed> ok
[07:48] <deivor> the 25 tbr is because I didn't let ffmpeg analyze the stream (analyzduration and probesize too small) to reduce latency
[07:49] <relaxed> I see
[07:52] <relaxed> then "ffmpeg -framerate 20 -i input -r 20 ..." should drop or dup frames to maintain sync.
[07:54] <relaxed> play with -framerate's value to see if it helps
[08:23] <jellosea> how can i add two vf filters
[08:24] <relaxed> https://www.ffmpeg.org/ffmpeg-filters.html#Description
[08:25] <jellosea> thanks
[08:39] <jellosea> if i do -vf scale=-1:480; ass=sub.ass it doesnt work
[08:39] <jellosea> something with the  i think
[08:40] <jellosea> if i do -vf ass=sub.ass it works, or -vf scale=-1:480 it works too
[08:40] <jellosea> combining it with quotes and semicolon doesnt seem to work
[08:41] <relaxed> -vf scale=-1:480,ass=sub.ass
[08:43] <jellosea> works thanks
[08:45] <relaxed> if the subs look odd you might have to reverse the filters
[09:06] <svvitch> what format to use for png image, as -f param ?
[09:08] <svvitch> when adding overlay
[09:13] <relaxed> svvitch: you shouldn't need to use -f unless you're piping it in.
[09:14] <relaxed> ffmpeg -i video -i image.png -filter_complex overlay output
[09:29] <svvitch> relaxed: the problem is that png file is without extension and ffmpeg does not understand what kind of file is
[09:36] <relaxed> try, ffmpeg -i video -f image2 image ...
[09:36] <relaxed> er, ffmpeg -i video -f image2 -i image
[10:42] <alexvf> hi, i need help with custom I/O to read a network stream (2.2.2)
[10:42] <alexvf> i had a blocking implementation of the read callback that worked right, but i had to changed to non-blocking because that thread needs to attend some user input
[10:43] <alexvf> now, i'm returning AVERROR(EAGAIN) when i can't read from network
[10:43] <alexvf> and i'm seeing noise in the decoded images
[10:44] <alexvf> is even possible in the current ffmpeg state to have a non blocking custom I/O for network streams?
[11:17] <ahessler> how much ram is needed for 2350x1080 ?
[11:17] <ahessler> 1GB is not enough it seems
[11:22] <ahessler> oh, 2G was enough
[11:26] <alexvf> please, someone with some knowledge on AVIOContext can tell me if custom I/O supports AVERROR(EAGAIN)? It seems that av_read_frame retursn incomplete frame when the read callback returns that value
[11:40] <akusingla> hello!! I am new to ffmpeg , I wanted to know if this api could be used for clipping videos on server side?
[11:50] <LucasG> Hi guys, anyone can share ffserver for a while? I have Connection reset by peer when i`m trying sendstream via http from ffmpeg to my ffserver. Complete log: http://pastebin.com/D9LhWrUc
[12:41] <line0> is there any way to tell ffmpeg to not do any character encoding conversions with -sub_charenc?
[12:42] <line0> (when extracting subtitles)
[12:43] <line0> like, just extract bytes and let something else take care of the rest?
[14:00] <relaxed> line0: did you see `ffmpeg -h full|less +/sub_charenc_mode`
[14:03] <line0> ah
[14:03] <line0> thanks
[16:33] <djook> hye huys
[16:33] <djook> I have a little question, not really code related
[16:34] <djook> I'd like to know if there is a specific country of origin fro the project
[16:34] <djook> as vlc is French, mplayer Hungarian and cyrus British....
[16:36] <djook> I found the dns to be Name Server:NS.ARTHIST.MTA.HU
[16:36] <djook> Name Server:THOT.BANKI.HU
[16:36] <djook> Name Server:NS3.MPLAYERHQ.EU
[16:36] <djook> so Hungarian as well ?
[16:40] <klaxa|work> afaik the original author of ffmpeg was fabrice bellard
[16:40] <iive> ffmpeg is hosted on same server as mplayer, that's why it is hosted in hungary
[16:42] <djook> iive, thanks to let me know ...
[16:42] <djook> I'll have a closer look at Bellard "origins"
[16:42] <iive> it started on sourceforge, then moved to arpi's mphq in hungary
[16:43] <iive> then a new machine that KotH set up in Switzerland.
[16:44] <iive> after the take over, arpi gave a new hosting machine.
[16:44] <djook> In the french wikipedia article about Bellard, He is said to be the first ffmpeg coder/dev
[16:45] <djook> iive, I remember that some servers were compromised circa 2010/11
[16:45] <djook> ffmpeg compilation is one of my favorite computer game
[16:46] <djook> I got myself an xserver ppc64 just for ffmpeg tests
[16:46] <djook> I played a bit with a ps3 in 2011 but du to the 256M of ram
[16:46] <djook> the OOM occured very fast
[16:46] <iive> hehe, that's great, do you run fate on it?
[16:47] <djook> fate ?
[16:47] <djook> is it an OS ?
[16:47] <iive> it is automated test environment.
[16:47] <iive> http://fate.ffmpeg.org/
[16:47] <djook> ok
[16:48] <djook> I ll have a look at that
[16:49] <djook> For the moment I only encode libx264 \/libfaac
[16:50] <iive> these automated tests allow finding out quickly if some change breaks some specific architectures.
[16:50] <iive> e.g. when some change is not endian safe.
[18:21] <astr> how to sync audio with video?
[18:26] <voip_> hi guys
[18:26] <voip_>  pls help me with 1 stream processing and multiple IP outputs. In ffmpeg status i have someting like frame=  412 fps= 26 q=-1.0 Lsize=N/A time=00:00:16.74 bitrate=N/A dup=19 drop=0. My output hase audio, but no video.
[18:26] <voip_> <voip__> http://pastebin.com/wByE8CB8
[18:39] <khaosmarmoset> hey.
[18:39] <khaosmarmoset> so regarding my webcam recording project.
[18:39] <khaosmarmoset> I can now set the bit rate and the i-frame period to suit youtube and everything seems great
[18:40] <khaosmarmoset> the only weird thing is that I can't seem to affect the fps of the webcam myself very much.
[18:40] <khaosmarmoset> or at all, really.
[18:40] <khaosmarmoset> sometimes when I start the process I get (after stabilisation) 25fps.
[18:40] <khaosmarmoset> usually it stabilises to about 15 fps.
[18:41] <c_14> Can you/are you using -r as an input option?
[18:41] <khaosmarmoset> the bitrate doesn't seem to have very much to do with it. I can set it higher or lower, but usually I drift back into 15 fps.
[18:42] <khaosmarmoset> I am using -r, but again it doesn't seem to be doing anything.
[18:42] <khaosmarmoset> v4l2-ctl's --set-parm also doesn't seem to be doing very much.
[18:42] <khaosmarmoset> ditto with my uvch264ctl's frame interval setting.
[18:44] <khaosmarmoset> so basically I have three knobs to twiddle, but none of them work.
[18:45] <khaosmarmoset> I don't really mind all that much, because 15fps is enough for me. 24 would be better. 30 would be great
[18:45] <c_14> You can get ffmpeg to drop/duplicate frames, but if your webcam isn't being reasonable there isn't much you can do on that end.
[18:46] <khaosmarmoset> when using -acodec copy -vcodec copy, then is the fps I see when recording the actual measured fps from the webcam?
[18:47] <c_14> The fps= you see when recording is the recording fps, if you can record in realtime, then yes it is. (assuming real-time source)
[18:47] <khaosmarmoset> right, ok
[18:47] <khaosmarmoset> damn, gotta run out for a bit before the shops close. brb.
[18:54] <astr> khaosmarmoset, how d you keep audio and video in syic?
[18:54] <astr> sync
[19:10] <Lokie> hello, I am trying to change a mkv to a mp4. -codec copy works fine for the video & audio streams but the subtitles (.ass) don't get copied. Shouldn't -codec copy copy all the streams?
[19:11] <rcombs> ASS subtitles aren't supported in MP4
[19:11] <Lokie> oh thought it was srt
[19:11] <rcombs> neither are those
[19:12] <Lokie> oh
[19:13] <Lokie> mp4 supports only hardsubs?
[19:13] <khaosmarmoset> astr: erh. I'm not sure.
[19:13] <rcombs> I think you could convert to mov_text
[19:13] <astr> khaosmarmoset, ok
[19:14] <khaosmarmoset> astr: which is to say, I just run ffmpeg -f alsa -i hw:1 -f v4l2 -r 24 -vcodec h264 -i /dev/video0 -vcodec copy -acodec aac -strict -2 -f flv
[19:14] <khaosmarmoset> astr: if you have any pointers, please let me know!
[19:14] <rcombs> khaosmarmoset: 0x3A28213A
[19:14] <astr> when 2 "-vcodec" ?
[19:14] <astr> when=why
[19:15] Action: khaosmarmoset faults rcombs
[19:16] Action: rcombs SIGSEGVs
[19:16] <khaosmarmoset> astr: the first one chooses the codec for the v4l2 input. the second one says to just move it along
[19:16] <khaosmarmoset> (I think. I'm not 100% sure)
[19:18] <khaosmarmoset> astr: yeagh, without the first -vcodec h264 ffmpeg resets it to raw YUYV and then the frame rate drops to 5 fps
[19:19] <voip_> trate doesn't seem to have very much to do with it. I can set it higher or lower, but usually I drift
[19:19] <astr> what about -input_format see ffmpeg -h full |less press "/" and paste "V4L2 indev AVOptions"and enter to search
[19:19] <voip_> http://pastebin.com/jePTMDbc
[19:19] <astr> don't know only just leaned of it
[19:19] <astr> "first -vcodec h264 ffmpeg resets it to raw YUYV" doesn't make sense to me
[19:20] <khaosmarmoset> I mean if I run it without the -vcodec h264, then I see that ffmpeg has chosen YUYV as the pixel format according to v4l2-ctl --all
[19:21] <khaosmarmoset> this is basically raw uncompressed frames afaict, and the hw only supports 5 fps for that case
[19:21] <astr> ok
[19:22] <kepstin-laptop> oh, that's an input option on the v4l device, right.
[19:23] <Lokie> rcombs I get Stream #0:2 -> #0:2 (ssa -> mov_text)
[19:23] <Lokie> and subtitle:10kB but I don't see any subs
[19:23] <Lokie> used: -i source.mkv -i source/para04.ass -c copy -c:s mov_text target
[19:26] <rcombs> your player might not support it?
[19:26] <rcombs> mov_text is rather obscure
[19:26] <Lokie> using ff to play it so maybe
[19:26] <Lokie>  FFmpeg does not (yet) support
[19:26] <Lokie> setting all properties for mov_text correctly.  mar 2013
[19:28] <voip_> please help http://pastebin.com/jePTMDbc
[19:30] <llogan> voip_: loglevel debug is often more annoying that helpful
[19:30] <llogan> why are you piping from ffmpeg to ffmpeg?
[19:33] <khaosmarmoset> how can I have the output go nowhere?
[19:33] <llogan> -f null -
[19:33] <llogan> http://ffmpeg.org/ffmpeg-formats.html#null
[19:34] <khaosmarmoset> thanks
[19:34] <khaosmarmoset> so that has nothing to do with it.
[19:35] <khaosmarmoset> I wanted to eliminate the -f flc as something that might be contributing to my problem
[19:35] <khaosmarmoset> -f flv even
[19:37] <voip_> llogan, i neeed
[19:37] <voip_>  multiple outputs
[19:37] <voip_>  https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs#no1, adm my command is ffmpeg -i input1 -i input2 -acodec & -vcodec & -f mpegts - | \
[19:37] <voip_> 	ffmpeg -f mpegts -i - \
[19:37] <voip_> 		-c copy output1 \
[19:37] <voip_> 		-c copy output2 \
[19:37] <voip_> 		-c copy output3 \
[19:38] <voip_> i dont know why in debug null, but in command i typed right output adress
[19:39] <llogan> why not use tee muxer?
[19:40] <voip_> i tryed with muxer, dosent work for me
[19:41] <voip_> ffmpeg/ffmpeg -i http://Source -preset fast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 96k -vcodec libx264 -b:v 900k -f tee -map 0:v -map 0:a  "[f=flv]rtmp://ServerA|[f=flv]rtmp://ServerB"
[19:42] <llogan> did you try the -flags +global_header suggestion?
[19:42] <voip_> no, can you help me, write right command ?
[19:43] <llogan> i mentioned it yesterday, but you didn't respond
[19:43] <voip_> i dont know how use -flags +global_header
[19:43] <llogan> just add it as an ouptut option
[19:44] <voip_> like: ffmpeg/ffmpeg -i http://Source -preset fast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 96k -vcodec libx264 -b:v 900k -f tee -map 0:v -map 0:a -flags +global_header "[f=flv]rtmp://ServerA|[f=flv]rtmp://ServerB" ?
[19:45] <llogan> sure, try that
[19:45] <voip_> lets me chek
[19:46] <Lokie> hmm if I were to burn the subs on the mp4 is there a flag that will used the same code / quality from the source?
[19:46] <Lokie> -d
[19:46] <Lokie> codec*
[19:46] <llogan> not with a lossy encoder
[19:46] <Lokie> source is a h264 mkv
[19:47] <Lokie> not sure that I understood your comment though
[19:47] <Lokie> ffprobe gives: Stream #0:0: Video: h264 (High), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 23.81 fps, 23.81 tbr, 1k tbn, 47.95 tbc
[19:47] <llogan> you can't get "same quality" if you use an encoder that makes a lossy output
[19:48] <llogan> you can get something the looks lossless or nearly so, but technically it is not
[19:51] <voip_> llogan, brilliant, it works! but durig encode i see bitrate=N/A why ?
[19:52] <llogan> i don't know
[19:53] <voip_> thank you !
[19:56] <voip_> guys, during encoding frame=   77 fps= 33 q=24.0 size=  , what is meaning variable  q=24.0 ?
[20:02] <khaosmarmoset> oh
[20:02] <khaosmarmoset> wow.
[20:03] <khaosmarmoset> when I turn the lights on I get 30 fps just like momma promised
[20:03] <khaosmarmoset> woot!
[20:03] <kepstin-laptop> yeah, most webcams use slower shutter speeds in the dark, limiting fps.
[20:04] <khaosmarmoset> right. turns out I didn't know that!
[20:04] <khaosmarmoset> thanks webcam. you were saving me from meself.
[20:04] <khaosmarmoset> :-D
[20:10] <voip_> guys, during encoding i see ststus: frame= 77 fps= 33 q=24.0 size=.., what is meaning variable q=24.0 ?
[20:11] <JEEB> the value is rather useless in modern formats, but it is supposed to note some average quantizer or so
[20:11] <JEEB> it really is useless and in general tells you absolutely nothing
[20:12] <voip_> oh, thanks
[20:15] <voip_> one more question, can you sgggset any special parameters, for taking streams from far away servers (too many hops to server, pinging time too high)
[21:46] <voip_> [aac @ 0x317c7e0] Input buffer exhausted before END element found
[21:46] <voip_> Error while decoding stream #0:0: Invalid data found when processing input
[21:46] <voip_> [h264 @ 0x38b40e0] negative number of zero coeffs at 29 18
[21:46] <voip_> [h264 @ 0x38b40e0] error while decoding MB 29 18
[22:04] <voip_> llogan, do you know how to fix problem with :
[22:04] <voip_> [h264 @ 0x38b40e0] negative number of zero coeffs at 29 18
[22:04] <voip_> [h264 @ 0x38b40e0] error while decoding MB 29 18
[22:04] <voip_> [h264 @ 0x38b40e0] concealing 812 DC, 812 AC, 812 MV errors in I frame
[22:05] <llogan> voip_: no. and when you have a problem you should always include your command and the console output (using a pastebin service)
[22:07] <voip_> llogan, sorry http://pastebin.com/PdmRAcBn
[22:44] <voip_> please help http://pastebin.com/PdmRAcBn
[23:08] <henriqueleng> I'm recording my desktop but it is using a lot of my CPU, can I speed up this process, maybe with post video processing?
[23:11] <henriqueleng> pastie.org/9684356
[23:11] <henriqueleng>  
[23:12] <llogan> henriqueleng: where's the rest?
[23:12] <henriqueleng> llogan: rest of what?
[23:12] <llogan> show your EXACT ffmpeg command and the COMPLETE console output
[23:13] <llogan> that seems to get ignored more than it doesn't
[23:13] <llogan> why?
[23:16] <henriqueleng> llogan: http://pastebin.com/ybk4ALuC
[23:22] <llogan> henriqueleng: why use the 1.2 release branch instead of git master or most recent release branch? use -framerate instead of -r for x11grab. changing "-b:v 10k" to "-qp 0" may be slightly faster (and it seems to be ignoring your -b:v anyway)
[23:24] <llogan> ...also it was set to 10k. no wonder it ignored.
[23:26] <llogan> oh, it ignored because you tried to set -b:v and -preset as input options
[23:26] <llogan> move preset after "-i :0.0+0.0"
[23:33] <henriqueleng> llogan: Qhat is -qp 0 for?
[23:34] <llogan> lossless output. it may encode "faster". then you can re-encode it at your leisure.
[23:35] <henriqueleng> llogan: And should I maintain the -preset ultrafast?
[23:35] <llogan> yes
[23:35] <henriqueleng> llogan: Right, thanks for helping
[00:00] --- Thu Oct 30 2014