[Ffmpeg-devel-irc] ffmpeg.log.20131004

[burek]

[01:12] <ac_slater> Hey guys, Does anyone know when avcodec_decode_audio3() became deprecated? (Version?)
[04:53] <skifreak> Could someone tell me why ticket #3009 (https://trac.ffmpeg.org/ticket/3009) is an enhancement, not a defect? (The priority of wish seems a little low, but that's just me)
[05:17] <relaxed> skifreak: It sounds like maybe DVDFab is to blame. Have you tried playing the samples with mplayer or vlc?
[05:17] <relaxed> What about playing the bluray with mplayer?
[05:20] <skifreak> relaxed: I can't play the files with mplayer since it's backend is ffmpeg
[05:21] <skifreak> bluray plays fine with mplayer
[05:21] <relaxed> then try dumping the stream with mplayer instead of dvdfab
[05:22] <skifreak> tried vlc, but it's not working so hot (vlc has problems with a good amount of different video files I have around, might be my build)
[05:22] <skifreak> relaxed: good point....need to figure out how to do that.
[05:22] <relaxed> mplayer -dumpstream -dumpfile output.m2ts $input
[05:23] <relaxed> add -benchmark too
[05:24] <skifreak> cool, though I might start running into problems when the movie is made of multiple m2ts files
[05:25] <relaxed> shouldn't matter if you're telling mplayer to play a specific title
[05:25] <relaxed> instead of random m2ts files
[05:26] <skifreak> ok, sorry, not quite experienced with looking through the actual dirs of a bluray and such
[05:26] <skifreak> how would I pick out a specific title....(asking google for help on this right now of course)
[05:26] <relaxed> https://wiki.archlinux.org/index.php/BluRay
[05:28] <skifreak> thanks relaxed. Giving it a look through. In your opinion, I shouldn't need any decryption software at all, I should always be able to find and copy the main title and extras that I need just by a simple mount?
[05:29] <relaxed> mplayer can decrypt it, I think, if you compile with the correct libs
[05:32] <skifreak> cool, stupid question...how do I know if it's compiled with the correct libs? what is compiled right now (gentoo) http://dpaste.com/1405280/
[05:32] <skifreak> Sorry, I know this is getting off of the beaten track of ffmpeg, but I've always had a problem obtaining passthrough 3d files
[05:39] <skifreak> large downside to using mplayer to stream, is that BD+ isn't available yet. Seems this would be an incomplete solution
[06:22] <skifreak> relaxed: thanks for the help, I'll definitely try to use mplayer to dump the stream, but it definitely sounds like a very incomplete solution. Tried using the latest vlc in windows to play the problem m2ts file in the bug, but it failed as well. Seems the only concrete option I have to obtain 3d files is to use dvdfab as I did before, by using its terrible avc encoder (highest cbr is 40 Mbps) to a 3840p sbs
[06:45] <skifreak> still don't quite understand why the codec for the file in ticket #3009 can't be found....mediainfo found it, I see no reason why ffmpeg shouldn't at least be able to find the codec, regardless of the software which was used to obtain it
[09:56] <effbiai> hi, i've got a problem compiling (actually configuring..) avxsynth. i know that this channel is for ffmpeg, but i don't know of any other channel with people who might be able to help
[09:57] <effbiai> my problem is that log4cpp exist, but doesn't work. http://pastebin.com/4S4FaKnd
[10:05] <JEEB> effbiai, avxsynth does not have anything for it, so I see no reason to use it to be honest
[10:06] <JEEB> also the development was pretty much stopped after the initial code drop
[10:06] <JEEB> so you end up with a crappy avisynth port that's left out to wither
[10:07] <JEEB> if you want something similar and that's actively developed you go for vapoursynth, otherwise you just use avisynth 2.6 with avs2pipemod under wine
[10:07] <effbiai> roger that
[10:07] <effbiai> thanks
[10:07] <effbiai> 32bit or 64bit?
[10:08] <JEEB> avisynth? the 64bit one is dead and was even worse in stability than the MT fork
[10:09] <effbiai> heh, roger that :)
[10:11] <JEEB> the newest 2.6 build should be fine for you I'd say
[10:14] <effbiai> thank you
[10:14] <effbiai> i'll give it a try
[11:37] <Xeta> Hi. Does anyone know if "av_read_frame" buffers data internally?
[11:44] <Xeta> Like, if it's an external file does it continuously download data in the background? Or should i build up my own buffer be calling av_read_frame as much as I want?
[11:58] <caraculo> Calling avformat_alloc_output_context2(&_oc, NULL, "mpeg", fname.c_str()); will fail to allocate the output context, even after calling avcodec_register_all
[12:33] <ln-> just out of curiosity, is anyone aware of a video codec that is optimized for situations where the image doesn't change nearly at all over time? (example: a fixed surveillance camera in a room where nothing rarely happens)
[12:42] <saste> ln-, most video codecs are like that
[12:44] <ln-> well, yes, but in this scenario possibly the same keyframe could be used over and over again, without the need for storing it multiple times.
[12:45] <ln-> dunno how much space that would save in practice, i'm just thinking and wondering aloud.
[12:49] <saste> ln-, you can force a huge gop size
[12:50] <saste> in that case no new keyframe will be generated if there is not enough "change" in the video
[13:05] <ln-> thanks
[14:22] <xlinkz0> is there any way I can get the real frame number after seeking ? ( either using the libs or the ffmpeg tool )
[14:24] <AleXoundOS_> maybe use mplayer?
[14:24] <Mavrik> xlinkz0, that would be rather hard
[14:24] <Mavrik> since you have to COUNT frames
[14:25] <xlinkz0> does mp4 have an index of all the frames or sometihng?
[14:26] <Mavrik> it has a partial index if encoder generates it.
[14:27] <AleXoundOS_> Hi. I record desktop with "-f x11grab" and sound with "-f pulse". What can you suggest for keeping audio and video in sync? Initially the sound is always behind, but not with same delay. This delay varies between 1 and 5 seconds. Later, the longer ffmpeg works, the more delayed is the sound.
[14:37] <effbiai> is it possible to check if a file has bin 2 pass encoded or not?
[14:44] <burek> how is -minrate different to -maxrate?
[14:45] <burek> if they both specify a "bitrate tolerance", what does it mean to have a minimum tolerance and a maximum tolerance?
[14:46] <burek> effbiai, why would one want to know that?
[14:49] <effbiai> because i'm trying to re-enigeer an encoded file. got he original and the encoded one
[14:50] <AleXoundOS_> burek, http://pastebin.com/3und22Bw
[14:51] <Mavrik> effbiai, no.
[14:51] <effbiai> thanks
[14:51] <Mavrik> effbiai, unless the encoder added encoding parameters as a metadata
[14:51] <Mavrik> x264 does that occasionaly
[14:52] <Mavrik> burek, I think that's encoder specific.
[16:20] <bouba> hi everyone, someone has a better parameter than "-r 1/20" to take regular thumbnails on h264 videos plz  ?
[16:23] <durandal_1707> bouba: it doesn't work or ?
[16:43] <burek> Mavrik thanks :)
[17:19] <bosnjak> hi all
[17:19] <bosnjak> what would "codec ptime" be?
[18:34] <ayaka> if I want to use ffmpeg to output rtsp, shall I start a server to listen it first?
[20:02] <evadnoob> question, I have some users complaining of this problem, at least the symptoms seem the same: https://code.google.com/p/chromium/issues/detail?id=223584
[20:03] <evadnoob> the problem seems related to the pix_fmt, yuv420p
[20:04] <evadnoob> so I thought I'd try a different pix_fmt, but the two I tried, their video streams were just black
[20:04] <evadnoob> I want to try and elimnate that issue as the problem my users are experiencing...
[20:04] <evadnoob> any suggestions for pix_fmt?
[20:05] <durandal_1707> what problem?
[20:11] <evadnoob> so the problem is that the video stream doesn't play, the audio stream does
[20:11] <durandal_1707> with what?
[20:16] <evadnoob> chrome, html5 video tag
[20:17] <llogan> evadnoob: did you already show your ffmpeg command and the complete console output on pastebin.com (I may have missed it if you did)
[20:19] <durandal_1707> but does it play/decode with ffplay/ffmpeg?
[20:20] <Mavrik> evadnoob, what made you think switching pixel format to something no player supports will help?
[20:22] <Mavrik> huh, this bug makes no sense
[20:26] <evadnoob> http://pastebin.com/8g36dWne
[20:26] <evadnoob> I don't have ffplay...
[20:27] <evadnoob> the bug suggest something about yuv420p being a problem, which doesn't make sense I have chrome 30, and I can play the video fine, many other users also play the video fine
[20:28] <evadnoob> llogan: output from ffmpeg: http://pastebin.com/8g36dWne
[20:28] <Mavrik> yuv420p is pretty much the only supported pixel format for H.264 for most players out there
[20:28] <Mavrik> it's also almost certanly not your issue
[20:28] <Mavrik> it looks like QuickTime plugin was broken at some point
[20:37] <evadnoob> maybe, but the users that are complaining are running windows 7, using chrome 29
[20:37] <evadnoob> I was able to get yuvj440p to work also
[20:37] <evadnoob> seems like a waste of time to chase that as the problem though
[20:38] <evadnoob> I compared one users codec versions to mine, I run a windows 7 vm, and the versions are identical
[23:04] <sponji> hmm, does x11grab leak memory?
[23:04] <sponji> valgrind ffmpeg -f x11grab -i :0.0 -t 0 foo.flv
[00:00] --- Sat Oct  5 2013