[Ffmpeg-devel-irc] ffmpeg.log.20120908

[burek]

[00:01] <JEEBsv> adding the actual support I'm not sure how hard it would actually be...
[00:09] <ike__> I just found out that ffmbc has added this tweak comply with some broadcasting standards. thanks a lot for looking into the source. If you don't think that there is a moral/technical objection to inclusion of other framerates, I'll create a report and point to ffmbc source for reference.
[00:09] <JEEBsv> ffmbc is GPL, and ffmpeg is LGPL
[00:10] <JEEBsv> we can't take it into account
[00:10] <JEEBsv> or more like, it can't be used as reference
[00:10] <JEEBsv> I have no idea about moral or technical objections, I haven't seen the specifications
[00:12] <ike__> yeah i see, well that is very true, i guess it can just be referenced as a use case
[00:14] <JEEBsv> anyways, with the quick look at the code there are some numbers that are needed, and that /could/ be it
[00:14] <JEEBsv> for 24 and 24/1.001
[00:15] <JEEBsv> also you just reminded me that I should really find that one spec I got to implement a certain video decoder... meh :V
[00:16] <ike__> hah good. by specifications, did you mean which standards use what combination including 24bit video in mxf?
[00:17] <JEEBsv> well, by specification I mean a spec
[00:17] <JEEBsv> a PDF or DOC that covers the technical details of the format
[00:21] <ike__> ah, duh. apologies.
[00:29] <ike__> damn, apparently "Unfortunately there are no "legal" copies of the spec that can be downloaded at this time. If you were a SMPTE member you could get access to various draft versions, but again that only comes at a cost! "
[00:29] <ike__> dang*
[00:38] <ike__> i'm guessing that is referring to documents like these http://store.smpte.org/category-s/1.htm
[00:41] <ike__> i believe this is the base document section b.7 deals with timecode http://read.pudn.com/downloads166/doc/fileformat/759223/mxf/SMPTE%20377M-2003%20Television%20Material%20Exchange%20Format%20(MXF)%20File%20Format%20Specification%20(Standard)[P1.PDF
[00:46] <manizzle> hey guys, so what is wrong with this line?
[00:46] <manizzle>  ffmpeg -i input.avi -acodec aac -vcodec mpeg4 output.mp4
[00:46] <manizzle> Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height
[00:46] <manizzle> is the error i get
[00:57] <manizzle> saste,  http://sprunge.us/MMdb
[00:58] <saste> manizzle, Codec is experimental but experimental codecs are not enabled, try -strict -2
[00:59] <saste> there are many things which suck in that error message, but it should point you to the right direction
[01:04] <manizzle> what will ffmpeg use as the bitrate for audio/video if i specify none?
[01:04] <JEEB> depends on the codec
[01:04] <JEEB> old default was 200kbps and some codecs use that
[01:04] <JEEB> libx264 f.ex. uses -crf 23 and -preset medium as default, current library defaults
[01:59] <tlhiv_laptop> is there a suggested method for converting a PDF slideshow (i.e., pages in a PDF) to a MP4 video?
[05:09] <delirus> Hi all.  Is there any way to add a "keywords" metadata tag into a .mov or .mp4 video encoded in ffmpeg?  I've been searching this for days :\
[16:10] <vmassuchetto> My ffmpeg is dropping all the frames while converting MP4 files. What can it be?
[16:10] <relaxed> vmassuchetto: pastebin.com your command and all output
[16:13] <vmassuchetto> relaxed: http://pastebin.com/Ssq3tQad
[16:14] <Mavrik_> ugh.
[16:14] <Mavrik_> vmassuchetto, what are you trying to accomplish
[16:14] <Mavrik_> (ffmpeg really has to drop the sameq parameter)
[16:15] <vmassuchetto> Mavrik_: I'm following this instructions to concatenate videos: http://stackoverflow.com/a/7333453/513401
[16:15] <Mavrik_> those are pretty wrong and you're basically destroying you're videos :\
[16:16] <vmassuchetto> Mavrik_: Ok, What would be a decent way of doing it?
[16:16] <Mavrik_> vmassuchetto, if your inputs are from the same camera
[16:16] <Mavrik_> (with same fps, resolution, etc)
[16:16] <vmassuchetto> Mavrik_: Yes, they are.
[16:16] <Mavrik_> I suggest you use mp4box tool to concatenate the mp4 files
[16:16] <Mavrik_> "mp4box -cat <file1> -cat <file2> output.mp4"
[16:25] Action: saste reminds that he has to update the docs and write in  CUBITAL LETTERS that the concat protocol *only deals with physical concatenation*
[16:31] <vmassuchetto> Mavrik: This just worked. Thanks!
[16:32] <Mavrik> saste, can I request 48px large letters under "-sameq": "THIS DOES NOT MEAN SAME QUALITY!!!!111oneeleven"
[16:33] <saste> Mavrik: patch welcome :)
[16:33] <Mavrik> ^^
[16:34] <relaxed> libav renamed it to -same_quant
[16:37] <relaxed> saste: what do you mean by "physical concatenation"?
[16:37] <saste> relaxed: cat 1.pdf 2.pdf
[16:38] <relaxed> I'm lost, what else would it mean?
[16:38] <saste> the resulting file will be the physical concatenation of 1.pdf and 2.pdf, but won't be magically a new valid PDF with the "logical" concatenation of the two files
[16:38] <saste> that is physical != logical
[16:38] <relaxed> oh, okay
[16:38] <saste> but many users belive concat to be a magical protocol, that perform logical concatenation
[16:39] <saste> that works only for a few formats (stream-based formats)
[16:39] <relaxed> well, as a user I want a magical protocol.
[16:39] <relaxed> :)
[16:39] <saste> concat demuxer, work in progress
[16:40] <Mavrik> yeah, but that's slightly harder to implement to ffmpeg as it stands now :P
[16:40] <burek> that would be an awesome feature once implemented
[16:40] <burek> either that or playlist support
[16:43] <saste> burek: that's basically the same thing
[16:44] <saste> nicolas proposed a WIP patch on ffmpeg-devel
[16:44] <burek> that's great
[16:45] <burek> a lot of people were asking if it's possible to do that with ffmpeg
[16:48] <rud> hi saste, I'll try the HLS patch tomorrow ;)
[16:49] <saste> rud: hi!
[16:49] <rud> :)
[17:08] <Doxin> I'm trying to use ffmpeg to stitch some loose pngs together, but I can't get it to do any kind of quality. it's worse than 240p on youtube. what gives?
[17:20] <Mavrik> Doxin, you're not passing the quality parameters?
[17:23] <Doxin> Mavrik: I might've possibly done something stupid. got it fixed now.
[18:08] <quizme> i have a stream of 320 X 240 px jpeg images coming in from the video camera.  Can ffmpeg turn that into an mp4/h.264 *stream* by appending to the mp4 package as the jpeg images keep coming in?
[18:37] <MagnusRedbeard> hi
[18:37] <MagnusRedbeard> i'm struggling with wildcards for image files.
[18:38] <MagnusRedbeard> i've got a bunch of images like 0001.xml.tga, 002.xml.tga that i'm trying to convert to video.
[18:38] <MagnusRedbeard> ffmpeg2theora -i %d.xml.tga -o output.ogv
[18:38] <MagnusRedbeard> that's what i thought would be the wildcard, but it doesn't work, nor does any other variation i can think of.
[18:38] <MagnusRedbeard> anyone know how it's done?
[18:41] <JEEB> ffmpeg2theora is not ffmpeg, just noting that
[18:41] <MagnusRedbeard> noted.
[18:41] <MagnusRedbeard> same wildcard system for ffmpeg?
[18:42] <JEEB> ffmpeg should have something like that, yes
[18:42] <MagnusRedbeard> "frame%04d.png" < i keep seeing stuff like that, but no explanation of how it works.
[18:42] <JEEB> general documentation on the ffmpeg app http://ffmpeg.org/ffmpeg.html
[18:43] <JEEB> (it has a couple of things related to that)
[18:45] <MagnusRedbeard> ffmpeg -f image2 -pattern_type glob -i 'foo-*.jpeg' -r 12 -s WxH foo.avi
[18:45] <MagnusRedbeard> Unrecognized option 'pattern_type'
[18:45] <MagnusRedbeard> Failed to set value 'glob' for option 'pattern_type'
[18:45] <MagnusRedbeard> hmm.
[18:45] <MagnusRedbeard> seems i'm using a different version of ffmpeg to that guide.
[18:45] <t4nk353> hello
[18:46] <t4nk353> any on there
[18:47] <t4nk353> anyone know how to watermark in ffmpeg?
[18:47] <t4nk353> i just need the commands
[18:47] <MagnusRedbeard> t4nk353: good luck with that.
[18:47] <MagnusRedbeard> rtfm is the only help i've got so far.
[18:49] <t4nk353> so ther is nodocumentation  on it ?
[18:49] <t4nk353> i might just bring up a virtualbox an do it on windows
[18:50] <JEEB> t4nk353, yes there is general documentation on a lot of stuff in ffmpeg http://ffmpeg.org/ffmpeg.html
[18:50] <JEEB> see video filters
[18:51] <JEEB> although to be honest I can only help in this way because I just don't know myself -- I don't use ffmpeg for stuff like that
[18:51] <JEEB> I think it's the overlay filter
[18:51] <t4nk353> ohh jeeb u helped me before :)
[18:51] <t4nk353> when i was installing ffmpeg that day :) im back lol
[18:58] <quizme> does ffmpeg support the H.264 Scalable High Profile ?
[18:59] <saste> t4nk353: overlay, check docs with examples
[18:59] <saste> you need an updated ffmpeg
[18:59] <t4nk353> i have the latest version
[18:59] <t4nk353> i just need the command really
[19:00] <saste> online documentation is synched against latest docs, so won't work with arbitrary old versions
[19:00] <saste> check the docs
[19:00] <saste> there are plenty of examples
[19:42] <DelphiWorld> hi
[19:42] <DelphiWorld> michaelni, build error in latest git: http://paste.debian.net/188627/
[19:43] <DelphiWorld> ubitux: http://paste.debian.net/188627/
[19:57] <saste> DelphiWorld: make distclean; configure --blah --blah
[19:57] <DelphiWorld> saste: done, trying allready
[19:59] <saste> DelphiWorld: and, it work?
[20:00] <DelphiWorld> saste: still building and look like yep
[20:05] <DelphiWorld> sasbuilt
[00:00] --- Sun Sep  9 2012