[Ffmpeg-devel-irc] ffmpeg.log.20111226

[burek]

[00:48] <ffmpeguser> cbsrobot: thank you for helping out man, i'll try again with a new build once a new one is released, maybe in the one i have these functions are broken
[00:48] <ffmpeguser> i'll disconnect now
[05:23] <CarlFK> I have a dir full of jpegs named 100-capture.jpg - 3172-capture.jpg - would like to encode them into something not very lossy
[05:25] <CarlFK> they are from a webcam, 6fps, most of it is no action, so not much change - hoping to delta that away
[06:03] <zap0> CarlFK, ffmpeg docs have examples
[06:04] <CarlFK> zap0: man or online?
[06:04] <zap0> online
[06:04] <zap0> ffmpeg.org
[06:06] <CarlFK> http://ffmpeg.org/faq.html#toc-How-do-I-encode-single-pictures-into-movies_003f  thanks
[06:15] <CarlFK> ffmpeg -f image2 -i %d-capture.jpg /tmp/a.mpg; %d-capture.jpg: No such file or directory  log: http://dpaste.de/0xwWJ/
[06:19] <CarlFK> -i %03d-capture.jpg did something, but my guess is it stopped at 999?
[07:04] <zap0> CarlFK, be careful, it might start at 0 or 1.
[07:05] <zap0> CarlFK, yes.. %03 requires leading zero, and only 3 digits.
[07:05] <CarlFK> zap0: my range is 100 to 3172
[07:05] <zap0> i do not think you can start at 100.
[07:05] <CarlFK> it encoded 3172 frames.  kinda weird 
[07:08] <CarlFK> Input #0, image2, from '%03d-capture.jpg': ... frame= 3172  http://dpaste.de/vgwFt/
[07:10] <CarlFK> I got what I needed... so all is well for now
[07:10] <zap0> :)
[08:09] <shifter1> Im getting a lot of "[mpeg2video @ 0x86e0100] mpeg_decode_postinit() failure" messages when trying to read from a dvb input source
[08:09] <shifter1> mplayer shows the dvb source fine, but dumping the ts and having ffmpeg read from it produces a lot of errors
[08:09] <shifter1> any ideas?
[08:29] <shifter1> ping
[10:00] <Mmike> Jel' mogu flv stavljati u mp4 container?
[10:00] <Mmike> Erm, ups :)
[10:01] <Mmike> Can a flv codec be inside a mp4 container? ffmpeg complains with: "[mp4 @ 0x25aac40] track 0: could not find tag, codec not currently supported in container ", not sure if I need to compile-in something, or I just have to use -vcoded mpeg4 for mp4 containters?
[10:01] <Mmike> do I even make sense? :)
[11:25] <Whitewizard> is there a wildcard key for input files?
[11:57] <z_eos> hi all
[11:57] <z_eos> may somebody help with "bind(port 8090): Address family not supported by protocol" issue, please?
[15:08] <aiwass> hi, can anyone tell me if that ffmpeg's m4a decode process is lossless, so it can be used to convert m4a to another lossless format?
[15:11] <mystica555_> m4a isn't lossless.. unless its ALAC. 
[15:11] <LexSfX> ffmpeg will properly and losslessly convert between lossless codecs, assuming the source and target codecs are both lossless
[15:12] <LexSfX> and assuming the target codec supports the source sample rate
[15:14] <aiwass> yes, if it's ALAC
[15:15] <aiwass> thaks, so converting m4a to flac will produce same lossless output
[15:15] <aiwass> *thanks
[15:18] <LexSfX> assuming the source sample rate is 655350Hz or lower (FLAC's maximum sample rate), that is true.
[15:20] <LexSfX> ah, ALAC has a max sample rate of 384000Hz anyway
[15:21] <aiwass> so, it's no problem converting. thanks
[15:21] <LexSfX> also, both codecs support up to 32 bits per sample, so there should never be a problem from ALAC to FLAC
[15:22] <LexSfX> there may be a problem from FLAC to ALAC at high sample rates  or 8-bit depth though
[17:34] <ami_> can anybody tell me how we set the frame rate for video using avcodeccontext structure in ffmpeg, beacuse there is no structure member like frame rate in ffmpeg library
[17:35] <ami_> I want to play h.264 video it look to play very fast so I want to control the frame rate
[19:08] <setmeaway> i want to volume up input audio by 30dB, am i doing correctly? -i input -filter "volume=30dB" output
[19:11] <setmeaway> it seems -filter "volume=30dB" doesn't work
[20:43] <user82> Hi. i tried to read the documentation but i am not sure about the "-r" option. if i got 50fps input and add "-r 25" will it slow the video down or drop half the input frames?
[20:47] <JEEB> I think that depends on if you set it before or after -i
[20:47] <JEEB> I think before is "override input stuff" and after is "drop/duplicate to make output of this fps"
[20:49] <user82> ah okay. thanks ill give it a try!
[20:59] <fixxxermet> Getting an error during make while following the ubuntu compilation guide:  http://pastebin.com/MWCTUKyX
[22:54] <ThiefMaster> hi, i'm trying to convert ac3 audio to wav while mixing all 6 channels into a single one. ffmpeg -i webdl.ac3 -ac 1 webdl.wav seems to create an 1-channel wav but it sounds like some audio channels are lost instead of mixed
[00:00] --- Tue Dec 27 2011