[Ffmpeg-devel-irc] ffmpeg.log.20120410

[burek]

[01:53] <lidenbrock> is ffmpeg better than mencoder?
[02:24] <ckb> What type of hardware is needed for an encoding server to handle a queue of videos to be encoded?
[02:27] <srez> How can I get ffmpeg t =o print out information about how a wav file is encoded? (i.e., mono/stereo, 8/16kHz, etc.)
[02:29] <srez> nvm
[05:29] <ckb> What type of hardware is needed for an encoding server to handle a queue of videos to be encoded?
[05:34] <relaxed> ckb: The fastest intel cpu you can afford.
[05:34] <ckb> why specifically intel?
[05:34] <ckb> and fastest? or most cores? or most ram?
[05:34] <ckb> or all the above?
[05:35] <relaxed> Intel is king. Yes, the more cores the better.
[05:37] <lidenbrock> Hi. I need an mpeg 4.4.2 decoder plugin.
[05:37] <relaxed> lidenbrock: plugin? for what?
[05:40] <lidenbrock> to see I video I have created. Mplayer is accusing it doesn't exist on my system.
[05:41] <relaxed> try ffplay
[05:46] <relaxed> lidenbrock: I find the time it takes you to respnd distrubing.
[05:49] <lidenbrock> lol
[05:49] <lidenbrock> sorry
[05:50] <lidenbrock> I need an plugin for microsoft 4.4.2 mpeg
[05:50] <lidenbrock> that's it
[05:50] <relaxed> Are you using linux?
[05:51] <lidenbrock> yes
[05:52] <relaxed> Do you have ffplay?
[05:54] <lidenbrock> not yet
[05:55] <relaxed> not yet? as in you will have it soon?
[05:56] <relaxed> I've had four pints tonight and my patients for your problem is dwindling.
[05:57] <lidenbrock> ;p
[05:57] <lidenbrock> man
[05:57] <Tthread> Hi )
[05:57] <lidenbrock> I'm aptituding
[05:57] <lidenbrock> :p
[05:57] <lidenbrock> I couldn't find the decoder
[05:57] <relaxed> debian?
[05:57] <lidenbrock> and it's driving me crazy
[05:57] <lidenbrock> yeah, debian
[05:57] <Tthread> did u test ffmpeg with vda support?
[05:57] <relaxed> unstable?
[05:58] <lidenbrock> no, stable
[05:58] <relaxed> of course it's stable
[05:58] Action: relaxed slaps head
[05:58] <lidenbrock> LOL
[05:59] <lidenbrock> man
[05:59] <lidenbrock> I'll get some sleep
[05:59] <lidenbrock> I'm almost falling here
[05:59] <lidenbrock> thanks for your help
[05:59] <lidenbrock> see you
[06:02] <relaxed> Tthread: who is "u" and what is vda?
[06:09] <Tthread> u means anyone :) i tell about video decoder acceleration
[06:10] <relaxed> Cool, english is not you native tongue. What are you trying to do?
[06:12] <relaxed> If you have a recent nvidia card, mplayer provides vdpau hardware decoding.
[06:12] <relaxed> I recommend mplayer2 if that's the case.
[06:12] <Tthread> I want to know is it more efficient to use vda for live video decoding. in my case videostream is about 6 mbits. and i want to decode it faster than now.
[06:13] <Tthread> i use avcodec_decode_video2 function for decode for each frame
[06:14] <Tthread> as i get it i should to add vds context in AvCodec context. am i right?
[06:16] <relaxed> Ah, you're using the libs for your own software. I would ask in #libav
[06:16] <relaxed> They're usually more helpful than here.
[06:16] <variable> anyone know how to convert a .ppm file to a .mp4 file? [image2 @ 0x804c2a820] Could not find codec parameters (Video: ppm) from ffmpeg
[06:17] <relaxed> even though it's the fork
[06:17] <Tthread> oh, thanks a lot. you are right about tongue )
[06:17] <relaxed> variable: ppm is an image file. what is your command?
[06:18] <variable> ffmpeg -i  foo.ppm -vcodec libx264 -preset ultrafast -crf 15 -threads 0 -x264opts frameref=15:fast_pskip=0 foo.mp4
[06:18] <relaxed> so one frame?
[06:18] <variable> honestly, ECLUE
[06:18] <variable> a program called 'gource' generated a 30 GB file
[06:19] <variable> with the extension .ppm
[06:19] <relaxed> I believe ppm is a raw image file
[06:19] <relaxed> you have one file that 30gb?
[06:19] <variable> yeah
[06:19] <relaxed> that's*
[06:19] <relaxed> lol
[06:20] <relaxed> pastebin the output of "ffmpeg -i file.ppm"
[06:20] <variable> hang on
[06:21] <relaxed> If it is an image it must be huge like xbox
[06:22] <relaxed> DEV D  ppm  PPM (Portable PixelMap) image
[06:22] <variable> relaxed: sample file, about 2.0 gb http://paste.pocoo.org/show/578795/
[06:23] <relaxed> clang? are you a bsd or OS X guy?
[06:23] <variable> BSD
[06:23] <relaxed> which?
[06:23] <variable> FreeBSD
[06:24] <relaxed> good for you :)
[06:24] <variable> :)
[06:24] <relaxed> You may want to try ffmpeg-devel
[06:24] <relaxed> in ports
[06:24] <relaxed> did you already try that?
[06:24] <variable> no
[06:25] <variable> I'll switch to -devel and try that
[06:25] <variable> relaxed: I need to go to sleep nowish, but I'll report back tomorrow. Thanks!
[06:25] <relaxed> you're welcome
[06:49] <_genuser_> hello people. I have a question about -itsoffset. what is the offset added to? the audio or the video?
[06:49] <_genuser_> I'm using -i video.mp4 -vcodec copy -i audio.mp4 -acodec copy  -itsoffset 00:00:20.000 target.mp4
[06:50] <_genuser_> and it's not seeming to do anything whereas it has worked fine with different offset on other files.
[07:28] <relaxed> _genuser_: I believe the inputs have to be demuxed.
[07:29] <relaxed> example, ffmpeg -i blah.264 -itsoffset 00:00:20.000 -i bleh.aac ....
[07:29] <relaxed> _genuser_: in that example it would affect bleh.aac
[07:30] <relaxed> you dig?
[07:31] <relaxed> you may be able to refernce the same input twice and use -map to do it as well.
[07:31] <relaxed> reference*
[11:59] <kriegerod> is there some audio frame allocation routine in API, similar to av_image_alloc()?
[13:05] <silverrocker> I have an input file suzie.avi and I want to convert it to h264 but I want to use Intra PCM mode
[13:05] <silverrocker> what parameters do I have to pass to ffmpeg
[13:30] <jessy> hey there, i'm recording audio from my mic with ffmpeg.exe -f dshow -i audio="default input" -y \"test.mp3", how can i set sample rate frequency etc.
[13:31] <ubitux> -ar?
[13:34] <jessy> ubitux: is that for me ? :) i really don't have much idea about ffmpeg :S
[13:35] <ubitux> -ar rate            set audio sampling rate (in Hz)
[13:35] <ubitux> so yes it's for you :p
[13:42] <jessy> ubitux: thanks :) let me try
[16:49] <JamesJJ> Hi. I'm trying to convert an flv file, which has a G711 audio track. FFmpeg lists the audio codec as 0x0008, is there a way to force the input codec?
[16:55] <sacarasc> JamesJJ: -codec:a blah as an input option.
[17:01] <JamesJJ> hmmm, just get unrecognized option '-codec:a'
[17:17] <Diogo> hi
[17:17] <Diogo> this command is correct to insert aac file in a video file?
[17:18] <Diogo> sudo /servers/ffmpeg/bin/ffmpeg  -i /files/HD.mp4 -i /files/music.aac -vcodec copy -acodec copy -absf aac_adtstoasc /files/VIDEO_COM_SOM.mp4
[18:03] <anoob> I didn't find nothing to GET video title or video description (metadata) ... just duration (ffmpeg -i filename.video) ...
[20:06] <_r00t_> g'day
[21:50] <javatexan> hey guys, can one do screen capture with ffmpeg on os x lion?  I found some conflicting info online from varying times, so I thought I would ask
[22:07] <cbreak> javatexan: Quicktime can do it
[22:07] <cbreak> javatexan: I don't think ffmpeg has the capabilities to do any kind of screen capturing
[22:09] <tdr> ffmpeg can under x11 (linux/*bsd*), not sure about under osx
[22:14] <cbreak> OS X doesn't use X11 as primary output
[22:15] <cbreak> it comes with an X11 server that can host individual windows though
[22:15] <cbreak> maybe those could be recorded.
[22:27] <javatexan> k thanks
[22:47] <Mista_D> Any way to limit ffmpeg's memory usage on 64bit CENTOS?
[23:31] <meekohi> If my libx264 is compiled with lavf enabled, how can I force it to not be used with ffmpeg command line args?
[23:35] <silverrocker> I'm building like this: "g++ -D__STDC_CONSTANT_MACROS -lm -lavdevice -lavformat -lavfilter -lavcodec -lswscale -lavutil main.cpp" and I'm only using av_init_packet to get started. I'm including libavcodec/avcoder.h and still I have undefined reference to `av_init_packet(AVPacket*) . Any clues?
[23:37] <silverrocker> If I build in c, I have no dependency errors, but when I build in c++ it gives me that linker error
[23:39] <Mavrik> did you put "extern C" guards around imports?
[23:48] <silverrocker> Mavrik: yes I already found that that was the problem
[23:48] <silverrocker> why aren't the headers C++ safe?
[23:51] <coydog> Hi folks, I think I've found a bug in ffmpeg. I'm about to try to trace it locally, but I just wanted to check in and see if it's a known issue. I couldn't find it in the ffmpeg bugzilla.
[23:52] <JEEB> I think ffmpeg uses trac currently
[23:52] <JEEB> https://ffmpeg.org/trac/ffmpeg/report
[23:53] <coydog> If I call ffmpeg repeatedly with the same command-line options, overwriting the same output file, subsequent runs appear to duplicate some frames in the first second or so of output, which seems to make us lose audio synch. It can be worked around by always creating a new file, instead of overwriting the same file
[23:53] <coydog> Has anyone else experienced this? Is it a known issue?
[00:00] --- Wed Apr 11 2012