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August 2012

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ffmpeg-devel.log.20120731
by burek 01 Aug '12

01 Aug '12

[00:32] <j-b> Daemon404: pong [00:33] <Daemon404> j-b, is there an eta befor i find out if im elligable for vd funding? (sorry to ask, tickets get far mroe expensive as it gets closer) [00:37] <j-b> Daemon404: I thought it was quite clear [00:37] <Daemon404> ? [00:37] <Daemon404> 'it'? [00:37] <kierank> oh fuck i need to reply to that [02:05] <Compn> videolan funding devs to RE some codecs? :P [03:16] <CIA-41> ffmpeg: 03Michael Niedermayer 07master * r3b5ba60aa7 10ffmpeg/libavcodec/ (vc1.c vc1.h): [03:16] <CIA-41> ffmpeg: vc1dec: fix handling of max_coded dimensions [03:16] <CIA-41> ffmpeg: Fixes Ticket1502 [03:16] <CIA-41> ffmpeg: Signed-off-by: Michael Niedermayer <michaelni(a)gmx.at> [03:16] <CIA-41> ffmpeg: 03Michael Niedermayer 07master * r30c8573dc7 10ffmpeg/libavcodec/mpeg4videoenc.c: [03:16] <CIA-41> ffmpeg: mpeg4videoenc: ensure SAR is within the supported range [03:16] <CIA-41> ffmpeg: Signed-off-by: Michael Niedermayer <michaelni(a)gmx.at> [04:25] <CIA-41> ffmpeg: 03Michael Niedermayer 07master * r00ddf62078 10ffmpeg/libavformat/mpeg.c: [04:25] <CIA-41> ffmpeg: mpegdemux: Fix probing of unrecognized_mpeg_video.mpg [04:25] <CIA-41> ffmpeg: Fixes Ticket1586 [04:25] <CIA-41> ffmpeg: Signed-off-by: Michael Niedermayer <michaelni(a)gmx.at> [11:05] <slackyman> Hi [11:05] <slackyman> I'm cross-compiling ffmpeg win w64-mingw32 on slackware 13.37 [11:05] <ubitux> http://szeged.github.com/nevada/ fun. [11:05] <slackyman> all went well until I add some c++ libs [11:06] <slackyman> c++ libs DO NOT link statically and require libstdc++-6.dll [11:06] <slackyman> I don't want any shared lib [11:07] <ubitux> --extra-libs=-lstdc++ ? [11:07] <slackyman> Now I'm trying adding "-static -Wl,-Bstatic,-lstdc++" to LDFLAGS [11:08] <slackyman> if I use --estra-libs=lstdc++ it keep linking shared libs [11:08] <slackyman> ok, that's another point [11:09] <slackyman> even if I copy the libstdc++-6.dll file it links dinamically to another one that is MISSING [11:09] <slackyman> Now I'm trying adding "-static -Wl,-Bstatic,-lstdc++" to LDFLAGS". It's the correct way? [11:10] <slackyman> Or is it only a workaround? [11:11] <slackyman> I think ffmpeg has to try linking statically ever [11:11] <slackyman> it works good for c libs [11:11] <slackyman> buut not for c++ libs [11:12] <slackyman> Or what if I simply add --extra-libs='-static -lstdc++' [11:12] <slackyman> ? [11:13] <slackyman> something's wrong in the tollchain, maybe, not in ffmpeg [11:13] <slackyman> *toolchain [11:20] <slackyman> anyone? [11:23] <ubitux> afaict the build system is not perfect when dealing with static link & external libraries [11:26] <slackyman> my only problems are with c++ libs. Maybe I have to try avoiding their use [11:31] <slackyman> I can confirm that adding "-static -Wl,-Bstatic,-lstdc++" to LDFLAGS solve the issue [12:19] <slackyman> bye [13:32] <CIA-41> ffmpeg: 03Stefano Sabatini 07master * rb4c3359828 10ffmpeg/libavfilter/f_settb.c: [13:32] <CIA-41> ffmpeg: lavfi/asettb: do not create a new reference in filter_samples() [13:32] <CIA-41> ffmpeg: There is no need to duplicate the input reference, since a filter should [13:32] <CIA-41> ffmpeg: not pass along a reference which is later modified. If this happens the [13:32] <CIA-41> ffmpeg: filter passing the reference should be fixed. [13:32] <CIA-41> ffmpeg: Also improve consistency with start_frame() of settb, allowing a pending [13:32] <CIA-41> ffmpeg: factorization. [13:33] <CIA-41> ffmpeg: 03Stefano Sabatini 07master * ra7c3720e87 10ffmpeg/libavutil/bprint.h: [13:33] <CIA-41> ffmpeg: lavu/bprint: readd documentation for 0 and 1 av_bprint_init() special values [13:33] <CIA-41> ffmpeg: The documentation was erroneously removed in 7cf9aadd. [13:33] <CIA-41> ffmpeg: 03Stefano Sabatini 07master * r23fc4dd6e7 10ffmpeg/ (4 files in 2 dirs): [13:33] <CIA-41> ffmpeg: lavc: add channels field to AVFrame [13:33] <CIA-41> ffmpeg: This is required otherwise it is not always possible to guess the number [13:33] <CIA-41> ffmpeg: of channels from the layout, for example if the channel layout is [13:33] <CIA-41> ffmpeg: unknown. [13:33] <CIA-41> ffmpeg: 03Stefano Sabatini 07master * rc809b89a12 10ffmpeg/ (doc/ffprobe.xsd ffprobe.c): ffprobe: show audio frame channels and channel_layout [13:33] <CIA-41> ffmpeg: 03Stefano Sabatini 07master * r52bd9cb4d2 10ffmpeg/libavfilter/src_movie.c: [13:49] <saste> ubitux: amovie problem should be fixed now [14:01] <ubitux> saste: thx :) [14:41] <ubitux> i'm working on issue 1576, but there is something strange [14:41] <ubitux> the input video stream has time base 2997/1 and codec time base 30/1 [14:42] <ubitux> in the muxer, the codec time base is re-use, so it should be 30/1 [14:42] <ubitux> but it's actually 2997/1, which is "invalid" somehow [14:42] <ubitux> any idea what could cause this? [15:13] <ubitux> in the header callbackm, in mxf muxer, i have tb=1/90000 & tbc=1001/90000 which makes sense, but in mov muxer i have tb=1/90000 & tbc=1/2997 [15:13] <ubitux> both with codec copy [15:21] <ubitux> ok it seems related to the timebase heuristics in transcode_init [15:28] <saste> michaelni: can you comment on "[PATCH] lavfi: add duration field to AVFilterBufferRef"? [15:34] <durandal_1707> can demuxer open various protocols? [16:21] <CIA-41> ffmpeg: 03Nicolas George 07master * r89898cd3b6 10ffmpeg/ (doc/ffprobe.xsd ffprobe.c): [16:21] <CIA-41> ffmpeg: ffprobe: fix validity error with tags and data. [16:21] <CIA-41> ffmpeg: Add "data" and "extradata" attributes to the schema. [16:21] <CIA-41> ffmpeg: Add "tag" element in "streams". [16:21] <CIA-41> ffmpeg: Print extradata before tags to avoid closing the element. [16:21] <CIA-41> ffmpeg: Fix trac ticket #1588. [17:35] <CIA-41> ffmpeg: 03Nicolas George 07master * r9009fa6de4 10ffmpeg/libavcodec/movtextdec.c: movtextdec: fix return value for too small packets. [17:36] <CIA-41> ffmpeg: 03Nicolas George 07master * r3d5dc7d87d 10ffmpeg/libavcodec/mmvideo.c: [17:36] <CIA-41> ffmpeg: mmvideo: count preamble size in return value. [17:36] <CIA-41> ffmpeg: MM_PREAMBLE_SIZE is subtracted from buf_size almost immediately. [17:36] <CIA-41> ffmpeg: The original size is still in avpkt->size. [17:36] <CIA-41> ffmpeg: 03Nicolas George 07master * rcc7eff1fa0 10ffmpeg/libavcodec/vc1dec.c: vc1dec: count ENDOFSEQ code in return value. [17:36] <CIA-41> ffmpeg: 03Nicolas George 07master * r1c98781837 10ffmpeg/libavcodec/8svx.c: [17:36] <CIA-41> ffmpeg: 8svx: use a more direct condition. [17:36] <CIA-41> ffmpeg: esc->table was inited based on codec->id: re-testing codec->id [17:36] <CIA-41> ffmpeg: is code duplication and can lead to inconsistencies. [17:36] <CIA-41> ffmpeg: 03Nicolas George 07master * r5caea648d4 10ffmpeg/libavcodec/8svx.c: [17:36] <CIA-41> ffmpeg: 8svx: remove useless rounding code. [17:36] <CIA-41> ffmpeg: samples_size and samples_idx are supposed to be multiple of [17:36] <CIA-41> ffmpeg: channels at all time. If they are, the division is exact; [17:36] <CIA-41> ffmpeg: if they are not, something is very wrong in the code. [17:36] <CIA-41> ffmpeg: 03Nicolas George 07master * r7a539e67f4 10ffmpeg/libavcodec/8svx.c: 8svx: unify mono and stereo code paths. [17:36] <CIA-41> ffmpeg: 03Nicolas George 07master * r91ec1c6cc3 10ffmpeg/libavcodec/loco.c: [17:36] <CIA-41> ffmpeg: loco: take decode overflow into account. [17:36] <CIA-41> ffmpeg: Commit 2bf0982 introduced an overflow check in loco_decode_plane, [17:36] <CIA-41> ffmpeg: but the error code is never taken into account, leading to [17:36] <CIA-41> ffmpeg: completely idiotic return values. [17:36] <CIA-41> ffmpeg: 03Nicolas George 07master * rd2ca5dd0f3 10ffmpeg/libavcodec/loco.c: [17:36] <CIA-41> ffmpeg: loco: fix return value. [17:36] <CIA-41> ffmpeg: The return value was the number of bytes left, [17:36] <CIA-41> ffmpeg: it is supposed to be the number of bytes used. [17:36] <CIA-41> ffmpeg: 03Nicolas George 07master * rb2814b034e 10ffmpeg/libavcodec/sp5xdec.c: [17:36] <CIA-41> ffmpeg: sp5xdec: sanitize return value. [17:36] <CIA-41> ffmpeg: i is the decoded size of a recoded packet, which is larger [17:37] <CIA-41> ffmpeg: than the original packet. Assume that if decoding succeeded, [17:37] <CIA-41> ffmpeg: all the packet was used. [17:38] <ubitux> is it me or first_pts is unused in ffmpeg? [19:01] <ubitux> ok that's because we don't use vf fps [19:21] <ubitux> ost->sync_opts = frame->pts + frame->nb_samples; [19:22] <ubitux> i don't understand this [19:22] <ubitux> how can that work? [19:23] <ubitux> i mean the time base of pts could be anything [19:24] <ubitux> shouldn't we have nb_samples rescale to the frame pts? [19:24] <ubitux> (it's some audio stuff in ffmpeg.c) [19:26] <ubitux> well anyway, check_recording_time() is made prior to this.. [21:25] <sandyiscool> hello all [21:30] <sandyiscool> i am new to this channel. i want to develop and contribute code to ffmpeg. but i am a total newbie to ffmpeg and multimedia codecs. i downloaded ffmpeg source and built it on my fedora distro. the build process was successful, albeit with some errors [21:31] <sandyiscool> now i want to start with studying the source code of ffmpeg and make myself comfortable in browsing and understanding the code [21:31] <sandyiscool> but as i said, i am a total newbie to video/audio encoding/decoding and muxing/demuxing [21:32] <sandyiscool> can anyone help with any tutorials that explain the basics of multimedia codecs, coding/decoding, muxing/demuxing of audio/video ? [21:34] <sandyiscool> sorry for the mistake. i meant to say that i successfully built ffmpeg from source , with few build warnings [21:38] <sandyiscool> hello Anssi [21:42] <michaelni> hi sandyiscool [21:42] <michaelni> what do you want to work on ? [21:43] <ubitux> sandyiscool: i'd recommend http://xiph.org/video/vid1.shtml and http://lurkertech.com/lg/video-systems/ [21:44] <ubitux> (for general stuff) [21:44] <sandyiscool> thank you ubitux. i am having a look at the links now [21:45] <ubitux> as michaelni asked, it also really depends on what you are willing to do [21:45] <sandyiscool> hi michaelni [21:45] <sandyiscool> well, right now, I am trying to understand how ffmpeg works as a whole [21:45] <sandyiscool> i am trying to understand the big picture [21:46] <sandyiscool> right now i do not have any specific idea about what i should work on [21:47] <ubitux> mmh big picture... [21:47] <ubitux> you should first look at https://ffmpeg.org/about.html [21:47] <ubitux> it gives a quick summary of each tool & library [21:48] <sandyiscool> okay [21:52] <sandyiscool> okay... so i read the 'about' page on the ffmpeg website [21:54] <sandyiscool> after reading, i have shortlisted three libraries in order of my interest to work on each : libavformat > libavcodec > libavdevice [21:56] <sandyiscool> the rationale is : i have always been fascinated how two different streams i.e. audio and video are interleaved in one stream and how they are separated by a player and played. secondly, i have always wanted to know what happens in the background by multimedia codecs. [21:56] <sandyiscool> thirdly, i want to know how video streams are rendered on screen and how audio stream is sent to the audio out [22:04] <sandyiscool> thanks ubitux for the two links for more info on video systems. i have to sign out now as its pretty late here. [22:06] <sandyiscool> will be nack later with my questions :) [22:06] <sandyiscool> *back [22:06] <sandyiscool> goodnight [22:22] <ubitux> philipl: you never submitted the 3 commits you showed right? [22:22] <ubitux> (the srtdec/txtdec patches) [22:23] <philipl> ubitux: I did not. No one ever commented on them originally and I focused on the movtext stuff. [22:23] <philipl> But they are in my overall pile of things that need to happen before mkv -> mp4 can work correctly [23:05] <CIA-41> ffmpeg: 03Ronald S. Bultje 07master * rb829b4ce29 10ffmpeg/libavcodec/x86/ (h264_deblock.asm h264dsp_mmx.c): [23:05] <CIA-41> ffmpeg: h264: convert loop filter strength dsp function to yasm. [23:05] <CIA-41> ffmpeg: This completes the conversion of h264dsp to yasm; note that h264 also [23:05] <CIA-41> ffmpeg: uses some dsputil functions, most notably qpel. Performance-wise, the [23:05] <CIA-41> ffmpeg: yasm-version is ~10 cycles faster (182->172) on x86-64, and ~8 cycles [23:05] <CIA-41> ffmpeg: faster (201->193) on x86-32. [23:05] <CIA-41> ffmpeg: 03Diego Biurrun 07master * r8728b381cb 10ffmpeg/libavcodec/x86/h264dsp_mmx.c: [23:05] <CIA-41> ffmpeg: x86: h264dsp: Adjust YASM #ifdefs [23:05] <CIA-41> ffmpeg: This fixes compilation with YASM disabled. [23:05] <CIA-41> ffmpeg: 03Samuel Pitoiset 07master * r9c9c21eaa1 10ffmpeg/libavformat/rtmpproto.c: [23:05] <CIA-41> ffmpeg: rtmp: do not warn about receiving metadata packets [23:05] <CIA-41> ffmpeg: They are managed in get_packet() [23:05] <CIA-41> ffmpeg: Signed-off-by: Luca Barbato <lu_zero(a)gentoo.org> [23:05] <CIA-41> ffmpeg: 03Diego Biurrun 07master * rd1505db067 10ffmpeg/libavfilter/x86/yadif.c: [23:05] <CIA-41> ffmpeg: 03Anton Khirnov 07master * rf2ed006c90 10ffmpeg/libavformat/mpc8.c: mpc8: return more meaningful error codes. [23:16] <slackyman> Hi [23:17] <philipl> ubitux: any further comments on the movtext encoder? I'd like to push it this week and then move on to sorting out the textdec and convergence_duration stuff. [23:18] <slackyman> I'm cross-compiling one of the latest ffmpeg-git and I found some solution to most of the issue you can find on the Internet [23:19] <slackyman> E.g.: for the libcdio - compiling it gives a "unknown type name 'ULONG'" [23:19] <ubitux> philipl: well if the timing are correct on playback, and if it passes fate i guess i don't have any comment [23:19] <slackyman> I've sent an email to Zeranoe [23:20] <slackyman> and, lately, I found that ffmpeg source DOES NOT link statically to c++ libs [23:20] <slackyman> co you have to add "-static -Wl,-Bstatic,-lstdc++" to LDFLAGS [23:20] <slackyman> I hope that someone take notes about these [23:23] <michaelni> slackyman, is this a regression ? [23:23] <michaelni> that is did this work before ? [23:25] <slackyman> I've made different version of "ffmpeg.exe" but never used c++ libs [23:25] <slackyman> this time i used libcdio and ut video [23:26] <slackyman> and they link ffmpeg to the shared libstdc++ [23:26] <slackyman> there's a little bug in my toolchain [23:26] <slackyman> I'm using mingw-64 [23:27] <slackyman> and the libstdc++-6.dll link to a missing lib [23:27] <philipl> ubitux: ok. thanks. [23:27] <slackyman> so no matter if I copy the file in the executable folder [23:28] <slackyman> it breaks the execution of the binary (not the compiling or the linking) [23:28] <nevcairiel> the library has to exist somewhere or linking wouldnt work [23:31] <slackyman> I try to explain better the case [23:31] <slackyman> libstdc++-6.dll links to LIBGCC_S_SJLJ-1.DLL [23:32] <Daemon404> thats nothing to do with ffmpeg [23:32] <Daemon404> whoever compiled your toolchain did it poorly. [23:32] <slackyman> yes, just I said before: this is a bug in the toolchain [23:32] <Daemon404> its not a bug either [23:32] <Daemon404> its an option [23:32] <slackyman> but the ffmpeg compilation problem is beside the static linking [23:33] <slackyman> as far as I know ffmpeg try to link libs statically if there's a static version [23:34] <Daemon404> it just tries -lstdc++ and uses whatever is there [23:34] <slackyman> but if I DO NOT specify CFLAGS+="-static -Wl,-Bstatic,-lstdc++" it DOES NOT [23:34] <slackyman> I have BOTH static and shared lstdc++ [23:35] <Daemon404> thats default gcc behavior. perhaps we shoul have a flag [23:35] <slackyman> I did't mean to criticize anyone [23:35] <Daemon404> there's actually a far mode hideous bug related c++ linking too [23:35] <Daemon404> if you generate shared libav* [23:35] <Daemon404> the generated export libs get screwed [23:36] <slackyman> I'm only saying that whilst ffmpeg link statically to C libraries it doesn't do the same for c++ ones [23:36] <slackyman> but you have to SAY to it that you want link statically [23:36] <Daemon404> ffmpeg does nto link statically to libc anywhere. [23:36] <Daemon404> unless you force it to [23:37] <slackyman> I compiled every external lib statically [23:37] <slackyman> then configure ffmpeg [23:37] <Daemon404> libc does not get linked statically. [23:37] <Daemon404> it links to msvcrt.dll [23:37] <Daemon404> on windows [23:37] <slackyman> and... enough! It links statically! [23:37] <Compn> whoa [23:37] <Compn> slackyman : how big is your binary? :) [23:37] <slackyman> I stripped it [23:38] <slackyman> but it's big [23:38] <Daemon404> slackyman, it does NOT link the ms c runtiem statically. just fyi [23:38] <Compn> does libcdio even work on windows ? [23:38] <Daemon404> the difference is the teh gnu toolchain has its own c++ runtime [23:38] <slackyman> no, I know, Daemon404, we are saying two different things [23:38] <slackyman> yes, it works [23:38] <slackyman> Compn [23:38] <Compn> i guess it does, ignore methen :) [23:38] <Daemon404> [17:36] < slackyman> I'm only saying that whilst ffmpeg link statically to C libraries it doesn't do the same for c++ ones [23:39] <Daemon404> ^ it does link statically to teh libraries [23:39] <Compn> slackyman : did you see zeranoe's builds ? those are static [23:39] <Daemon404> it links dynamically to teh c++ runtime [23:39] <Daemon404> teh libraries themselves are statically linked. [23:39] <Compn> Daemon404 : what are you arguing anyhow [23:39] <slackyman> ok, Daemon404, now I know, but before this talk I ignore it [23:40] <slackyman> to have a big-static-monolithic executable I have to link statically to every lib [23:40] <Daemon404> and ffmpeg's behavior is to respect the system gcc's preference for linking libstdc++ static or dynamic [23:40] <slackyman> so i add "-static -Wl,-Bstatic,-lstdc++" and that's all [23:40] <Daemon404> whic his a toolchain option [23:40] <Daemon404> and unrelated. [23:40] <slackyman> ok [23:41] <slackyman> I'm not into C++ [23:41] <slackyman> didn't know [23:41] <Daemon404> grab nevcairiel's toolchain if you want a working mingw toolchain [23:41] <Daemon404> that is static [23:41] <Daemon404> or well, nevcairiel's repackaging of my toolchain. [23:41] <slackyman> I used Zeranoe build script to compile my mingw-w64 [23:41] <JEEB> not any more [23:42] <slackyman> and it works great on my slackware 13.37 [23:42] <Daemon404> slackyman, zeranoe has an option to create a fully-static toolchain [23:42] <Daemon404> during setup [23:42] <slackyman> yes, but it fails to compile [23:42] <Daemon404> works here [23:42] <slackyman> so i left everything unchanged [23:43] <slackyman> I have a Slackware 13.37 [23:43] <Daemon404> yes i use debian. [23:43] <slackyman> Daemon404, which version of gcc runs on debian? [23:43] <slackyman> I have a 4.5.2 [23:43] <Daemon404> system gcc, or my cross-toolchain? [23:44] <slackyman> system [23:44] <Daemon404> debian unstable is on 4.7 and 4.6.3, and ubuntu si on 4.6.3 [23:44] <slackyman> since the toolchain compiles under the system one [23:44] <Daemon404> i havent tried on debian stable [23:44] <Daemon404> which is 4.4.5 [23:44] <Daemon404> or so [23:44] <Daemon404> 4.4.x, anyway. [23:44] <slackyman> slackware use the old 4.5.2 since they test everything sooooo long before to distribute [23:45] <Daemon404> debain stable is older. [23:45] <slackyman> Daemon404, have you tried to cross-compile ut-video? [23:46] <slackyman> or libcdio? [23:46] <slackyman> and include them in ffmeg? [23:46] <Daemon404> considering i wrote libutvideo's makefiles, and ffmpeg's libutvideo*.cpp [23:46] <Daemon404> yes [23:46] <Daemon404> yes i have. [23:46] <slackyman> ok :) [23:46] <slackyman> sorry, I'm new here [23:47] <Daemon404> i actually fixed asm support for utvideo with makefiles [23:47] <Daemon404> so you can cross-compile with utvideo's asm [23:47] <Daemon404> patch is it my git repo [23:47] <slackyman> thanks [23:47] <Daemon404> have you had trouble? [23:47] <slackyman> yes, I modified the GNUMakefile [23:48] <Daemon404> which part [23:48] <slackyman> I had to remove GlobalConf from linking [23:49] <Daemon404> ah [23:49] <slackyman> and make some changes to 2 header files [23:49] <Daemon404> i didnt add that. [23:49] <Daemon404> sec [23:49] <Daemon404> let me link you to the patch of mine [23:49] <Daemon404> it fixes mingw builds too [23:49] <Daemon404> there was a missing heaer include [23:49] <Daemon404> and stuff [23:49] <Daemon404> https://github.com/dwbuiten/utvideo/commit/42351ecb5f81dede1f13ffa695ba5060… [23:49] <Daemon404> x86 asm works on all platforms [23:49] <slackyman> I used the utvideo 11.1.1 [23:50] <Daemon404> x64 asm only works on windows [23:50] <Daemon404> that patch is to 11.1.1 [23:50] <Daemon404> it will apply cleanly [23:51] <slackyman> yes, but I have to untar again since I modified a lot [23:51] <Daemon404> mv dir dir.old && unzip utv.zip [23:52] <Daemon404> or just git clone my repo [23:52] <Daemon404> since it is up to date [23:52] <slackyman> git clone https://github.com/dwbuiten/utvideo.git [23:52] <slackyman> I'm waiting... :D [23:52] <Daemon404> ;p [23:53] <slackyman> I often modify Makefiles instead to launch make SOMESTUFF=otherstuff [23:53] <slackyman> I make a copy of the orig [23:53] <Daemon404> lazymodo [23:53] <slackyman> then rename the new to Makefile.win [23:54] <slackyman> and launch make -f Makefile.win [23:54] <slackyman> so I can still copmile for linux [23:54] <slackyman> with very little changes [23:54] <slackyman> ok [23:54] <slackyman> let me see how it works [23:57] <slackyman> I checked the GNUMakefile [23:58] <slackyman> it seems that libutvideo it's not shared [23:58] <slackyman> ok, I think this is made well [23:59] <slackyman> now I remove the old lib, install the new one and try to recompile ffmpeg [23:59] <Daemon404> libutvideo is gener shared [23:59] <Daemon404> never* [23:59] <Daemon404> i couldnt be arsed to add support [00:00] --- Wed Aug 1 2012

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ffmpeg.log.20120731
by burek 01 Aug '12

01 Aug '12

[00:00] <vitrums> llogan: I did something and now I can't stream as I usually did ( The video is too fast so the justin.tv player won't display it correctly, but freezes every 3 seconds and gives away fast motion not the original speed, then freezes again and so on. [00:04] <vitrums> fflogger: here you go http://pastebin.com/PRX0q6B6 [00:05] <vitrums> fflogger: I'll try to reboot now, cause I've just removed libvdpau1 lib (it was installed in order to prevent blue tones in flash players like youtube), since it's got something to do with the HW acceleration [00:05] <vitrums> so hold on, I'll be in two minutes [00:07] <vitrums> i'm back [00:09] <vitrums> nope, removing this package had no effect [00:11] <vitrums> however I'm not quite sure if I did it properly, since the youtube videos are displayed correctly, notwithstanding the fact I did actually removed the package, that used to fix the bug with blue tones [00:19] <piie> nobody an idea about my stream ordering problem? [00:19] <piie> even tried ffmpeg from git [00:27] <vitrums> oh, that's bad. I actually managed to spot the problem source: ffmpeg started to work baggy with my webcam! [00:29] <vitrums> I don't know what exactly happened with my system settings the past day, but it had an effect upon ffmpeg working with webcam. I've tested out the live caption using VLC and webcam is working properly. What might be the reason of such a behaviour? [00:48] <vitrums> I've resolved it. Dunno why exactly right now, but the fact is that ffmpeg solely without my consideration decided not to work like it used to do =) To speak concrete: I used to have -fps as 30 for both the x11grab and my webcam. It worked fine. Now... ffmpeg can't suck 30 frames from my webcam anymore. Why? I'm confused, but I've removed this (as I hope) redundant -fps forcing flag from webcam input settings and the picture is fine again. So keep it in m [00:48] <vitrums> ind, if you find your ass on the same fire ^^ [00:51] <vitrums> Mavrik, good day) [02:08] <msmithng> in ffmpeg.c -> print_report, I'm seeing vid = 1 [02:47] <msmithng> sorry... [02:49] <msmithng> in ffmpeg.c -> print_report, as the output stream iterates through that struct, vid =1 is causing any subsequently started streams to miss out on the parsing through to expose their associated frames and fps... [02:49] <sine_> anyone know an easy GUI windows front end for ffmpeg [02:49] <msmithng> anyone see any long term issues with just commenting out vid = 1? [03:37] <bbhoss> Hello all, I am trying to transcode an FLV file in speex format to mp3. When I do ffmpeg -i foo.flv foo.mp3 I get this: https://gist.github.com/ac0a10cfde5d85c1ecb0 Any help? I'm on the latest git HEAD [03:50] <soulstitchmmo> Is there any way I can record sound withotu recording my mic? [04:16] <bbhoss> soulstitchmmo: pipe in /dev/random for some noise [09:31] <liquidee> hello everyone [09:32] <liquidee> im using command: ffmpeg -f video4linux2 -i /dev/video4 -vcodec copy -f h264 rtp://192.168.0.116:5004 [09:32] <liquidee> to stream video from my hardware encoder to my laptop. I think this should work, but im seeing only black screen on laptop. Any ideas? [09:56] <zap0> why do you think it should work? [11:24] <powerNET> i'm a little confused about legality. i've read the ffmpeg website but i'm still not sure if I'm able to redistribute a ffmpeg package with lame and x264 library [11:24] <powerNET> if i cant do it, then how does the zeranoe site distribute those packages [11:24] <liquidee> hello [11:25] <liquidee> i have a question regarding rtp streaming with ffmpeg [11:26] <liquidee> for streaming, when im specifying the output file i should append -f rtp rtp://ip:port [11:26] <liquidee> the ip i write there is ip of the computer im streaming to, or the streaming computer's ip? [11:27] <powerNET> former [11:32] <liquidee> do i need to configure anything else for it to work? [11:32] <liquidee> because it simply doesnt : ( [11:34] <Mavrik> powerNET: what does it say about the license after you configure your ffmpeg? [13:50] <[4-tea-2]> Hi, I'd appreciate pointers to resources explaining VBR and 2-pass encoding with ffmpeg/x264. I tried the Wiki, but came up empty. [14:11] <[4-tea-2]> Found what I needed, I think. [14:43] <astropirate> is there a table somehwere that showes what audio/video codecs container types support? [14:48] <astropirate> What is the difference between the flags [14:48] <astropirate> -preset and -vpre [14:49] <sacarasc> -preset uses x264's presets directly. -vpre uses presets created for ffmpeg. [14:50] <astropirate> ahh i see. thanks sacarasc [14:52] <astropirate> sacarasc, so, -vpre and -preset are only relevant when dealing with x264? [14:52] <microchip_> yes, and -vpre is deprecated [14:53] <astropirate> cool. thanks [14:54] <sacarasc> No, there are -vpresets for libvpx. [15:57] <subanomic> hi [16:18] <subanomic> what do I have to install in order to be able to convert to webm with vp8 as the video codec and vorbis as the audio codec? [16:19] <subanomic> are there any bundled packages available for this? [16:44] <fturco> Hello. I'm trying to use ffmpeg to convert some TV recording to the WebM format. I don't know which is the option for telling the video encoder to use VBR mode (I can't find it at http://wiki.webmproject.org/ffmpeg) [16:47] <sine_> anyone know of a decent winGUI for ffmpeg, i would have thought it would be a simple thing to do, just passing commands [17:00] <subanomic> is there a way to scale the output video with ffmpeg without using -vf? [17:00] <subanomic> because it tells me -vf is an unrecognized option [17:01] <subanomic> and I don't have sufficient access to the machine to update ffmpeg [17:01] <sacarasc> Then you're probably running too old a version. [17:01] <sacarasc> You could try to get one of the static builds, you don't need to install them... [17:02] <microchip_> subanomic: -s WxH ? [17:03] <subanomic> microchip_: is it possible to specify only the height? because the input videos might have different aspect ratios [17:03] <sine_> does anyone know what format the ps3 player will run. [17:03] <sine_> im thinking of trying to get my x264 movies to run on it and wonder if i have to reencode or maybe just remux [17:03] <microchip_> subanomic: i'm not sure exactly, but my guess is no [17:38] <BrianGU> Hi - I am following the instructions on https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide for my system (Ubuntu 12.04 Server). I note that when I install the ffmpeg and do the command "hash x264 ffmpeg ffplay ffprobe", I get "bash: hash: ffplay: not found". Looking at posts #1477-1481 on http://ubuntuforums.org/showthread.php?t=786095&page=148, it appears that the culprit is a... [17:38] <BrianGU> ...missing installation of libsdl1.2-dev. And, if I look at the Preparation section of the compilation guide, that file isn't listed for the Server but it is for the Desktop version. So my question is - as I have this installed on the server, do I need ffplay? (I am installing this so that I can create a user job in MythTV to convert recordings to mp3.) Thanks [17:56] <Mavrik> BrianGU: no, you don't need ffplay if you have a headless server :) [17:56] <Mavrik> ffplay is just a simple player :) [17:59] <powerNET> is it possible to play videos with ffmpeg/ [18:01] <microchip_> powerNET: nope, that's what ffplay is for [18:16] <BrianGU> ok great - thank you for the quick reply. (May I make a suggestion that the hash command in the ffmpeg instructions says that, if you are doing a server install, you shouldn't try to hash ffplay). Cheers [20:33] <pzaljr> okay, so PHP developer setting up FFMPEG-PHP on a Ubuntu Precise remote server [20:33] <pzaljr> I think I accidently deleted ffmpeg.so last night- do Ineed to recompile ffmpeg to get that back? [20:34] <cbreak> package manager? [20:35] <pzaljr> I'm not well versed with that but I used check install... [20:36] <pzaljr> ffmpeg - Package created with checkinstall 1.6.2 [20:36] <pzaljr> woot, what do? [20:36] <cbreak> no idea about that. [20:37] Action: cbreak always compiles from source :/ [20:37] <pzaljr> so does the package manager allow me to grab that file? [20:45] <iive> ffmpeg-php is completely separate from ffmpeg. [20:45] <iive> they have just picked up bad name because they somehow use ffmpeg. [20:48] <Zeranoe> What is the correct way to merge two videos? aka, take video01.mp4 and video02.mp4 and encode to output.mp4 and have that play video01 and then video02? [20:48] <pzaljr> but that ffmpeg.so comes from ffmpeg-php, iive? [20:49] <iive> there is no ffmpeg.so in ffmpeg project. [20:50] <pzaljr> thanks [20:52] <Zeranoe> Is doing something like that even possible with FFmpeg? [21:37] <Zeranoe> I'm trying to encode 3 inputs into one output playing each after each other. Intro>Pictures>Outro. Here is my command so far: ffmpeg -y -i "intro.mov" -r 4 -i "photos\%d.JPG" -i "outro.mov" -filter_complex "[0] [1] [2] concat=n=3:v=1 [v]" -map "[v]" output.mp4 I keep getting Input link in1:v0 parameters (size 3088x2056, SAR 0:1) do not match the corresponding output link in0:v0 parameters (640x480, SAR 0:1) anyone know how I can resi [21:41] <powerNET> Zeranoe, is it legal to distribute one of your ffmpeg binaries? [21:41] <Zeranoe> powerNET: Within software? [21:42] <powerNET> no as a seperate exe [21:42] <powerNET> im just calling it thought cli [21:42] <powerNET> when i try to compile gpl version of ffmpeg it says i cant redistribute it so i was hoping to distribute your one with a cli gui app im making [21:45] <Zeranoe> my public builds are licensed under gpl. [21:46] <powerNET> how did u compile it without getting "license: non-free and not redistributable"? [21:47] <Zeranoe> without compiling with --nonfree [21:47] <CodeFriar> I want to get a clip of video from a longer video using the ffmpeg c api. for the life of me I cannot figure out what function that would be called any ideas / [21:49] <powerNET> Thanks. That did it! [21:49] <powerNET> Sorry I couldnt help you out with your issue :( [21:50] <Mavrik> CodeFriar, you read packets, you write packets back :) [21:51] <CodeFriar> Mavrik: any examples? or even open source projects that have such a feature ? [21:51] <Mavrik> CodeFriar, well... ffmpeg.c? [21:51] <CodeFriar> Mavrik: I've been told you can use a setting to effectively copy, without re-encoding [21:51] <CodeFriar> i'm reading through it, but i'm not seeing where it actually does that [21:51] <Mavrik> yeah, when calling ffmpeg from command line :) [21:52] <Mavrik> it's called "copy" codec [21:54] <CodeFriar> wish there was a way to see how ffmpeg translates the command line options to method calls [21:55] <Mavrik> CodeFriar, go check the decoding and encoding examples in docs/ [21:55] <Mavrik> CodeFriar, and instead of (de/en)coding just write the read packets to output [21:56] <CodeFriar> reading that now. I was hoping there was a convienence method for this. I can't be the first person to want to do this without reading a degree's worth of background on how video files work [21:56] <Mavrik> well [21:56] <Mavrik> CodeFriar, just execute the ffmpeg then with proper parameters? [21:56] <CodeFriar> lol, can't the binary isn't available, only the libraries [21:57] <Mavrik> that's the fastest, most convenient way [21:57] <Mavrik> make the binary available then :P [21:57] <CodeFriar> android [21:59] <]grimm[> Is there a way to transcode multichannel audio after applying a spatialization filter to it? [22:23] <Zeranoe> Is there any way to set the SAR? [22:26] <dooley> Does anyone know why libfaac would throw an unsupported container error when encoding from an mp4 to an mp4? [23:32] <Mista_D> any method to force output FPS to 1/2; 1/4 of the original? [00:00] --- Wed Aug 1 2012

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