[Ffmpeg-devel-irc] ffmpeg.log.20151216

[burek]

[04:08:01 CET] <autofsckk> hello good night, i have a very dumb question, i try to get a gif from a file named Star Wars Episode V - The Empire Strikes Back.avi  but i have tried to name it like  Star\ Wars\ Episode\ V\ -\ The\ Empire\ Strikes\ Back.avi   and using "Star Wars Episode V - The Empire Strikes Back.avi"  but not matter what i do i get this error   Star: No such file or directory
[04:44:26 CET] <Zeranoe> Can m4s files be concatenated into an mp4 and play properly?
[10:49:46 CET] <daHEVC> hi someone can help with HEVC coefficients, using ffmpeg?
[11:54:28 CET] <waressearcher2> dashcloud: hallo
[12:59:23 CET] <rjp421> can i change the listening port of the listening http server for the cmd 'ffmpeg -loglevel info -r 10 -vcodec  -s 320×240 -f video4linux2 -i /dev/video0 http://localhost/webcam.mjpeg' ? i want it to listen on 0.0.0.0:1234, changing from 'localhost' doesnt work
[13:47:48 CET] <paule32> hello
[13:49:31 CET] <jigg> hi
[13:59:30 CET] <waressearcher2> paule32: hallo
[14:00:24 CET] <paule32> have you seen my project?
[14:00:52 CET] <qubodup> -framerate - does it exist? did it ever exist?
[14:01:06 CET] <paule32> sure
[14:01:54 CET] <qubodup> is it documentted anywhere?
[14:02:22 CET] <paule32> -r 10
[14:02:39 CET] <qubodup> come again?
[14:04:00 CET] <qubodup> I was getting "Option framerate not found." and I just realized that it was because I used it in front of audio input
[14:04:19 CET] <qubodup> there seems to be no own section for -framerate in man ffmpeg though
[14:05:32 CET] <paule32> https://ffmpeg.org/ffmpeg.html
[14:05:57 CET] <paule32> search for "framerate" and see: -r
[14:06:41 CET] <qubodup> paule32: I'm there, but it has no own section still and I don't understand how to decide whether to use -r or -framerate
[14:07:06 CET] <paule32> framerate is deprecated, use -r
[14:07:27 CET] <paule32>  To force the frame rate of the output file to 24 fps:
[14:07:27 CET] <paule32> ffmpeg -i input.avi -r 24 output.avi
[14:07:50 CET] <furq> qubodup: https://www.ffmpeg.org/ffmpeg-formats.html#image2-1
[14:07:56 CET] <qubodup> paule32: I don't think the docs are trying to state that -framerate is deprecated: This is not the same as the -framerate option used for some input formats like image2 or v4l2
[14:08:01 CET] <furq> it's an option for the image and rawvideo formats
[14:08:54 CET] <paule32> furq: have you seen: http://kallup.net/data/ ?
[14:09:01 CET] <qubodup> furq: oh, thanks, that's helpful
[14:21:37 CET] <sylvain> hi :)
[14:21:56 CET] <Guest46432> is it possible to send ffmpeg output to stdout but frame by frame ?
[14:22:33 CET] <paule32> yes, you can
[14:22:37 CET] <paule32> but why
[14:22:46 CET] <paule32> see "tail"
[14:22:55 CET] <Guest46432> webchimera.js project
[14:23:09 CET] <paule32> you have to stream into a file first
[14:23:18 CET] <Guest46432> we search a way to read any video file the send frames to render in a gl canvas
[14:23:48 CET] <paule32> you open source group?
[14:24:24 CET] <Guest46432> euhh yes
[14:24:52 CET] <paule32> what do you think: http://kallup.net/data ?
[14:25:13 CET] <paule32> its a brand new project by me, with Qt5 as framework
[14:27:35 CET] <Guest46432> good start :)
[14:29:04 CET] <kevmitch> If i use ffmpeg to create a libx264 mkv, how is the file frame rate determined / written?
[14:29:27 CET] <kevmitch> the one seen by running ffmpeg -i on the result
[14:31:00 CET] <paule32> Guest46432: have you run it?
[14:33:27 CET] <Guest46432> just launched it not used paule32
[14:33:42 CET] <paule32> yeah
[14:34:07 CET] <paule32> i wonder, why it is running, you have Qt5 installed?
[14:34:53 CET] <paule32> you can't use it, it is a alpha thinking tool, which i have created for fun in 2 hours, yesterday
[14:35:56 CET] <paule32> it would be greatefull, when i get feedback, and suggestions
[14:36:08 CET] <paule32> may be partner ship
[14:36:57 CET] <paule32> i have running a nginx server that can feed with ffmpeg data
[14:37:43 CET] <Guest46432> i code only thru js / nodejs ... :p
[14:37:48 CET] <Guest46432> yes i have qt5 installed
[14:37:59 CET] <Guest46432> good luck have to go :)
[15:15:31 CET] <gianni3> Hi
[15:16:05 CET] <gianni3> I need a help to install AMRWB encoder in my ffmpeg folder
[15:16:15 CET] <gianni3> Someone can help me?
[15:18:01 CET] <waressearcher2> gianni3: hallo
[15:18:09 CET] <gianni3> Hi
[15:18:16 CET] <waressearcher2> gianni3: wie geht's es dir ?
[15:18:34 CET] <gianni3> I don't know german
[15:24:47 CET] <shincodex> what is the best way to use the system libavcodec libraries
[15:24:59 CET] <shincodex> Alls i need to do is decode a video stream from rtsp(camera)
[15:25:12 CET] <shincodex> so i assume i only need avcodec and thats it
[15:25:21 CET] <shincodex> I dont do audio or subtitles
[15:31:57 CET] <nguydavi> Hi, when extracting subtitles, is it possible to not have the <font> tags ?
[15:33:39 CET] <shincodex> this channel is like social security office
[15:33:42 CET] <shincodex> you will wait forever
[15:33:59 CET] <waressearcher2> shincodex: geht's es dir gut ?
[15:35:30 CET] <klaxa|work> shincodex: maybe have a look at doc/examples/decoding_encoding.c ? (http://ffmpeg.org/doxygen/trunk/decoding__encoding_8c.html)
[15:35:43 CET] <shincodex> well i think just
[15:35:52 CET] <shincodex> sudo apt-get install libavcodec-dev
[15:35:58 CET] <klaxa|work> oh
[15:35:58 CET] <shincodex> gets me what i need i hope
[15:36:11 CET] <klaxa|work> not sure about that
[15:36:13 CET] <shincodex> But im hoping to God that when i do this on Arm processor I get same exact behavior.
[15:38:05 CET] <shincodex> im hoping i can just use the headers in libavcodec-dev
[15:38:18 CET] <shincodex> and it links with the system libraries and it wont cause trouble
[15:38:33 CET] <klaxa|work> if the versions match, it should work, right?
[15:38:37 CET] <shincodex> Yesterday I was going to do a dlopen( and just reference functions to all the code i would ever use.
[15:38:45 CET] <shincodex> Well there was a wierd problem with one of the sample libraries
[15:39:06 CET] <shincodex> for instance we have ffmpeg source and build entirely all of it and it originally selected system libraries
[15:39:23 CET] <shincodex> well ldd had cancer on one of them.... avformat? saying something about sample
[15:39:35 CET] <shincodex> then i force linker to link to the ones build by source and it was ok.
[15:48:37 CET] <Mavrik> if you used apt-get, you most likely got something ancient that's not even ffmpeg.
[15:49:47 CET] <furq> is it time to play the "is it ubuntu lts" game
[15:49:52 CET] <furq> i'm voting yes
[15:54:04 CET] <shincodex> i want bare minimum
[15:54:10 CET] <shincodex> you should see my configure
[17:00:37 CET] <Guest45060> hi, if i redirect a ffmpeg output to stdout... is it possible to catch this stream frame by frame to send it to a canvas in a web page (thru nodejs) ?
[17:03:10 CET] <Zeranoe> Guest45060: Probably, yes
[17:04:48 CET] <Guest45060> so if working the canvas can virtually display any type of file since ffmpeg decode it right ?
[17:08:16 CET] <Zeranoe> Guest45060: Sounds like you're trying to do live HTML5 video?
[17:09:00 CET] <smolleyes> sort of yes
[17:09:31 CET] <smolleyes> open stream thru ffmpeg -> render it in a web canvas (gl) ...
[17:10:13 CET] <Zeranoe> Seems like a good way to do it. I've experimented with dumping into images and asyncing the images back
[17:13:03 CET] <smolleyes> i already do sort of live streaming in an app thru a web server and nodejs but i send the stream to an html5 player (so it only read mp4 webm ....) or i have to transocde the stream, now i want the same thing but without this problem :p
[17:13:34 CET] <kepstin> keep in mind that such an approach will be basically unusable over the internet, since the bitrate of the decoded video is gonna be enormous.
[17:13:53 CET] <kepstin> but should be doable for wired lan or really good wireless connections
[17:13:56 CET] <smolleyes> it s for local app
[17:14:12 CET] <Zeranoe> Are you breaking the video up to bits? Since H.264 requires a duration?
[17:14:17 CET] <smolleyes> yup but don t know how the audio will be handled :/
[17:15:20 CET] <smolleyes> i detect the duration from ffmpeg then force it in my html5 player if needed ...
[17:16:03 CET] <Zeranoe> smolleyes: So it isn't "live" in the sense that it's endless?
[17:18:13 CET] <smolleyes> humm for exemple i can take my adsl box tv streams -> ffmpeg -> render it in my html5 player without duration and it works, same thing with twitch streams or any live video ...
[17:55:47 CET] <shincodex> whats a good text editor for coding that supports GTAGS
[17:56:02 CET] <shincodex> I just found out visual studio code is racist against C/C++
[18:24:23 CET] <shincodex> undefined reference to `avformat_network_init()'
[18:24:27 CET] <shincodex> the frick is this crap
[18:24:41 CET] <shincodex> is it just av_network_init( now
[19:09:24 CET] <shincodex> i dont get it
[19:09:28 CET] <shincodex> i did verbose linking
[19:09:37 CET] <shincodex> nm -D on the library the fucking symbol is there why is not work
[19:13:50 CET] <DHE> building shared libraries? same library used for linking as running?
[19:23:03 CET] Action: Hello71 uses psychic debugging
[19:23:20 CET] <Hello71> need to pass -lavformat on the linker command line.
[19:24:26 CET] <furq> you know he left right
[19:24:54 CET] <furq> he probably kicked his computer to death
[19:25:05 CET] <DHE> i'm not psychic. some days I'm not even sane.
[19:25:34 CET] <furq> i'm disappointed that this game of "is it ubuntu lts" is still unresolved
[19:27:08 CET] <DHE> meh, the image of his computer kicked to death makes it worth it. reminds me of The Website is Down episode 3
[19:27:19 CET] <DHE> including chipmunk voices. :)
[19:35:13 CET] <paule32> hello
[19:35:28 CET] <paule32> how can i see ffmpeg stream in http browser?
[19:40:42 CET] <paule32> http://kallup.net:8080/onpublish_auth?psk=oassword
[19:40:58 CET] <paule32> is that right ?
[19:41:01 CET] <waressearcher2> oassword ? wirklich ?
[19:41:19 CET] <paule32> password is fictive
[19:41:57 CET] <paule32> i would like, that i can view in browser
[19:42:06 CET] <paule32> instead player like vlc
[19:43:13 CET] <paule32> have you idea's?
[19:51:47 CET] <Mavrik> You need something to act like a streaming server and then a player on your web page.
[19:51:54 CET] <Mavrik> ffmpeg isn't a streaming server
[19:52:05 CET] <Mavrik> But it can send encoded video to such software.
[20:02:23 CET] <furq> paule32: this is #ffmpeg, not #nginx
[20:02:39 CET] <furq> you should probably at least mention that you're using nginx before asking for help
[20:03:09 CET] <furq> anyway to view rtmp streams you need flash, or you can use nginx-rtmp's hls output with hls.js
[21:33:14 CET] <balexand> can anyone help explain the meaning of the -aframes parameter on the ffmpeg executable?  What exactly is a 'frame' if I am converting from mp3 to PCM?
[21:46:35 CET] <Mcl0vin> balexand: a quck 'ffmpeg --help' shows '-aframes number     set the number of audio frames to output'
[21:46:52 CET] <balexand> yeah
[21:46:58 CET] <balexand> what is an audio frame?
[21:47:14 CET] <balexand> I would like to be able to specify the number of audio samples
[21:47:23 CET] <balexand> I may have to just specify the duration in seconds
[21:52:47 CET] <Mcl0vin> It depends on the sample rate and the frame rate:
[21:52:48 CET] <Mcl0vin> at 24fps and 48000Hz every frame is long (48000hz/24fps)= 2000 sample
[21:52:48 CET] <Mcl0vin> at 25 fps and 48000Hz: (48000hz/25fps)= 1920 sample
[21:53:23 CET] <Mcl0vin> hope it helps.
[21:57:18 CET] <kepstin> so the audio "frame length" depends on the video framerate? that doesn't make sense...
[21:57:25 CET] <kepstin> what happens in audio-only files, or vfr?
[21:58:23 CET] <balexand> Yeah, I can't seem to change ffmpeg's concept of "frame length" using the -r parameter (which is under video options)
[21:58:48 CET] <c_14> balexand: asetnsamples
[21:58:54 CET] <c_14> (it's a filter)
[22:50:15 CET] <kbarry> I'm trying to  take HLS as a source, and output RTMP. Here is my paste: http://pastebin.com/0kc0sNhs
[22:50:44 CET] <llogan> this page has been removed
[22:51:56 CET] <kbarry> http://pastebin.com/DaXWTAnp
[22:52:10 CET] <kbarry> My bad, I was still researching my problem before hitting submit.
[22:52:19 CET] <kbarry> (Thanks for responding)
[22:53:10 CET] <llogan> why not stream copy the audio instead of re-encoding? -c copy
[22:54:16 CET] <kbarry> llogan because i'm a newb and didn't know that was an ption
[22:55:20 CET] <kbarry> I'm gonna need to look at the docs, and see what i figure out. Tanks for the reply./
[23:27:30 CET] <kbarry> llogan still getting the same output errors.
[00:00:00 CET] --- Thu Dec 17 2015