[Ffmpeg-devel-irc] ffmpeg.log.20141217

[burek]

[00:32] <DrSlony> this is bizarre
[00:33] <DrSlony> im comparing video compressed using x264 crf=10 to crf=23
[00:33] <DrSlony> blend=all_mode=difference
[00:33] <DrSlony> not much difference between that
[00:34] <DrSlony> or even between 10 and 30
[00:34] <DrSlony> but
[00:35] <DrSlony> http://i.imgur.com/s64BqF9.jpg
[00:35] <DrSlony> but now i recompress the crf=10 to a new file still using crf=10, and i get this!
[00:35] <DrSlony> http://i.imgur.com/2hFx6pm.jpg
[02:29] <Corin> Hey, does anyone know where I can get info about using transport streams?
[02:29] <Corin> I don't know where else to ask.
[02:42] <pentanol> Corin ffprobe
[02:42] <pzich> not the info of a transport stream, but using transport streams (I'm assuming)
[02:43] <Corin> I want to be able to stream videos over a server.
[02:49] <Corin> Also, if anyone knows any easy way to convert ASS/SRT files to TTXT...
[03:51] <justinX> Corin: what is ttxt ?
[03:51] <pzich> text
[03:51] <pzich> but really, http://gpac.wp.mines-telecom.fr/mp4box/ttxt-format-documentation/
[03:52] <Corin> Timed Text. MPEG part 17 streamed subtitle format.
[03:56] <justinX> looks like the way anime series have subtitle to replace signs etc...?
[03:59] <justinX> good for that but, not something one would want for the normal subtitle that you want to be able to set size and font etc yourself
[04:16] <squeegily> I have an old netbook whose GPU is too old for hardware acceleration. The CPU is too slow to decode H.264 720p video in time. (It takes more than a second to decode a second of video). What's a command I can type to create an uncompressed copy of a video?
[04:18] <squeegily> They're MKVs with styled subtitle tracks and multiple audio tracks - sometimes I will need the SRTs burned in; sometimes a simple SRT passthrough is all that's needed.
[06:03] <ParkerR> If I'm just wanting to stream my screen to a local http port how would I go about this? Most examples I'm finding are for older ffmpeg or just incompatible
[06:03] <ParkerR> (x11grab)
[07:13] <DrSlony> ParkerR why is x11grab older or incompatible?
[07:19] <fffan__> there is AV_CODEC_ID_H261 and AV_CODEC_ID_H263, where is AV_CODEC_ID_H262?
[07:22] <DrSlony> if only there was a way to google that and click the first match
[07:23] <fffan__> I googled
[07:24] <DrSlony> and learned that h262 = ?
[07:25] <fffan__> also I can't find MPEG-4 Part 2's id
[07:26] <DrSlony> mpeg-4?
[07:26] <fffan__> H.262/MPEG-2 Part 2
[07:27] <DrSlony> -c:v mpeg2video
[07:28] <fffan__> I need the codec id
[07:28] <fffan__> not a string in command line.
[07:32] <DrSlony> codec id? give an example
[07:32] <fffan__> AV_CODEC_ID_H261
[07:32] <sekon> Hello what is the difference between amix and amerge filters ?
[07:32] <fffan__> maybe I should go to ffmpeg-devel |
[07:34] <DrSlony> maybe you should go to google.com, great site
[07:35] <fffan__> sometimes google can't help you, man, thanks.
[07:35] <DrSlony> http://lmgtfy.com/?q=mpeg2video+AV_CODEC_ID
[07:35] <DrSlony> yeah well sometimes you have to try before coming to that conclusion
[07:36] <sekon> thanks for the help .. my issue got solved
[07:36] <sekon> please dont answer the question i asked earlier
[07:42] <DrSlony> you're very welcome fffan__
[08:52] <DrSlony> How do I compile ffmpeg with ffv1 experimental support?
[08:52] <DrSlony> [ffv1 @ 0x1969940] Version 2 needed for requested features but version 2 is experimental and not enabled
[08:53] <DrSlony> and why does it say version 2 is experimental when "The bitstream of version 3 is frozen since August 3, 2013. The final commit marking this version as officially released for production usage was on August 26, 2013."
[09:03] <relaxed> DrSlony: try -strict experimental
[09:09] <DrSlony> thanks relaxed
[09:11] <DrSlony> ffv1 worked when i removed -slices and -slicecrc
[09:21] <anshul_mahe> does mp2 audio is contained inside pes packet to be muxed in ts file
[10:50] <sabkaraja> are there any developers out here. I need a help adding a custom codec in the ffmpeg build
[10:51] <sabkaraja> Hiring / contracting developers that is
[10:52] <relaxed> which codec?
[10:52] <sabkaraja> hikvision
[10:54] <relaxed> sabkaraja: http://ffmpeg.org/consulting.html
[10:56] <sabkaraja> relaxed: I already contacted, but havent got any response...
[11:02] <relaxed> sabkaraja: ask in #ffmpeg-devel and mention you want to contract someone
[11:02] <DrSlony> Which filter is recommended for removing the kind of artifacts you see in the top-left corner? hqdn3d did a great job on everything else but the top-left corner looks like compression artifacts (smartphone footage).
[11:02] <DrSlony> http://i.imgur.com/o699SiG.jpg
[11:34] <anshul__> sabkaraja: hi
[11:35] <anshul__> I am intrested, can you hint how much you can pay
[12:11] <wh-hw> hi, all , how to write a network stream to a file?
[12:14] <__jack__> ffmpeg -i blabla -c copy output.mkv
[12:15] <wh-hw> __jack__, is that format same ?
[12:16] <__jack__> you want the same format ? replace output.mkv by output.ts (or whatever), or force the output format (ffmpeg -i blabla -c copy -f mkv toto)
[12:16] <wh-hw> __jack__, yes
[12:20] <wh-hw> thx
[12:31] <wh-hw> __jack__, is transcode happen here ?
[12:32] <__jack__> nope, only copy (-c copy)
[12:32] <__jack__> you can replace this switch by some codecs
[12:45] <sabkaraja> anshul___: sorry saw your message now
[12:49] <sabkaraja> anshul_mahe: I have already this issue on trac. Please give me an estimate of time.
[12:54] <Rumbles> hello, ffmpeg doesn't seem to be able to read this file: http://pastebin.com/9J51jngt can anyone tell me if I should recompile with additional options or is the issue with the file?
[12:58] <anshul__> sabkaraja: can you please mention the ticket
[12:58] <anshul__> ticket number
[12:58] <sabkaraja> anshul_mahe: https://trac.ffmpeg.org/ticket/4182
[13:02] <anshul__> let me have look to sample, may I have ur email id, for further query I would directly contact you
[13:06] <anshul__> sabkaraja: I am unable to download sample video uploaded by carl
[13:07] <sabkaraja> anshul__ : http://www.datafilehost.com/get.php?file=cc992777
[13:07] <anshul__> thanks
[13:07] <sabkaraja> my email is: sabkaraja at hotmail.com
[13:09] <anshul__> Whats your requirement exactly, from your message I thought you want to get your proprietry decoder to be intigrated in ffmpeg
[13:10] <anshul__> but in ticket it looks like mp2 is not able to decode the audio
[13:26] <c_14> Rumbles: what kind of file is it?
[13:36] <Rumbles> mkv c_14
[13:38] <c_14> Do you know what codecs it has? Where did you get it from?
[13:39] <Rumbles> afraid I don't know, is there a way to tell? IIRC from a torrent :)
[13:40] <c_14> Well, technically ffprobe should know, but ffmpeg doesn't seem to like it. Do you have mediainfo installed?
[13:40] <c_14> Right now I see 2 options
[13:40] <c_14> 1: the file is corrupt
[13:40] <c_14> 2: the codec/part of the mkv spec isn't implemented
[13:41] <c_14> In case of 2 you'll have to open a feature request on trac and upload a sample of the file and wait/hire someone to implement it.
[13:46] <Rumbles> i see
[13:47] Action: Rumbles checks to see if ffprobe is installed
[13:50] <Rumbles> http://pastebin.com/QCvzm0nK c_14, I doubt it's one file that is corrupt, as the whole 7 seasons don't show up in Serviio, which normally means that ffmpeg cannot read the files and so doesn't display them :/
[14:07] <c_14> Is there supposed to be a video stream?
[14:07] <c_14> But yeah, it looks like the codec[s] aren't implemented yet.
[14:27] <Rumbles> thanks for the help c_14 :)
[14:47] <Cloudflare> Question: Recording X11. Using Xinerama so 5760x1080. I want to record 3rd screen along, which means I need to offset the video capture by 3840 (of the 5760). Does anyone know how to achieve this in ffmpeg?
[14:49] <BtbN> https://trac.ffmpeg.org/wiki/Capture/Desktop
[14:49] <Cloudflare> Ooh, worked it out, thank you. It was a misread on my part.
[14:49] <Cloudflare> Thanks BtbN
[14:57] <danell> Hi! I'm making a script to easy brun in subtitles with FFmpeg but the first time running it stops for a very long time because it's caching all the fonts, but the console output doesn't say anything so it looks like it's just frozen. Are there any way to be able to write a message to the console output, ether in the ffmpeg command or the fonts.conf
[14:57] <danell>  file. I searched around but only found how to not show any message at all =/ Hope you can help. Thanks!
[15:14] <anshul_mahe> there are 2 field in packet, one is data other is buffer, what is the significane of both
[15:14] <c_14> danell: you could probably insert a printf before line 388 in libavfilter/vf_drawtext.c, that should be it
[15:17] <anshul_mahe> where to copy my data in data or buffer
[15:33] <DrSlony> Which filter is recommended for removing the kind of artifacts you see in the top-left corner? hqdn3d did a great job on everything else but the top-left corner looks like compression artifacts (smartphone footage). http://i.imgur.com/o699SiG.jpg
[16:05] <cas> hi, I try to sync audio from V:decklink->v4l2loopback->x11grab->decklink and A:decklink->audiocard->decklink but I got an drifting offset. Any ideas for directions how to solve this issue?
[16:27] <kaotiko> hi
[21:56] <nestolea> Does ffmpeg save the size of a video as values inside the video file when converting?
[22:07] <anshul_mahe> nestolea: depend if you are not coverting to raw format then it does save size
[22:09] <nestolea> Converting to Xvid/MP4 for a video player named TCMP on a PDA.
[22:10] <nestolea> This video player seems to get confused if width and height is stated to be 0 (zero).
[22:11] <nestolea> And this is what I noticed since ffmpeg version 2.3.1 ...
[22:12] <anshul_mahe> thats when video frames are not correctly encoded, or may be not decoded by your player
[22:12] <anshul_mahe> did u tried just now with same video and older ffmpeg version
[22:13] <nestolea> I retrieve the dimensions stored in the file with 'ffprobe -show_streams videofile.mp4 | & egrep "width|height"'
[22:14] <anshul_mahe> so its not showing?
[22:14] <nestolea> I noticed the problem starting with 2.3.1 and today confirmed it with 2.3.3
[22:15] <anshul_mahe> can please do a bug report with your sample on ffmpeg track
[22:15] <c_14> nestolea: check with git master first
[22:16] <nestolea> More robust players like VLC don't show problems. Others like TCMP or mplayer fail to play the video.
[22:16] <nestolea> I'm currently using the versions in my Linux distro repositories...
[22:17] <nestolea> So I would have to compile ffmpeg 2.5 myself to confirm this issue with the latest version?
[22:17] <c_14> http://johnvansickle.com/ffmpeg/
[22:17] <c_14> Grab a static.
[22:17] <anshul_mahe> nestolea: dont fear from git, you can download it from ffmpeg.org, and it take 3 step to compile
[22:18] <anshul_mahe> gud night frnds
[22:18] <nestolea> Plus the libraries, probably...
[22:18] <c_14> nestolea: just grab a static
[22:18] <nestolea> good night anshul_mahe
[22:19] <nestolea> @c_14, yes this looks great. Thanks a lot for the link!
[22:21] <nestolea> Is the git version preferred over the 2.5 release when it comes to a bug report?
[22:21] <c_14> yep
[22:21] <c_14> If you don't use git, the first thing cehoyes will probably ask you is if you tried with git.
[22:22] <nestolea> OK. I will try this way. Many thanks for your help!
[22:23] <c_14> Oh, and if it still happens with git, make sure you supply the command and console output from the git version and state that this is a regression since whatever you used since 2.3.1 (ie that it worked in whatever you had before and stopped working when you tried 2.3.1)
[22:29] <nestolea> yep
[22:30] <nestolea> (It worked before 2.3.1.)
[23:10] <nestolea> Tested with the git static build: The problem is gone! Video size is reported correct, now!
[23:15] <nestolea> BTW: What is the difference between ffmpeg and ffmpeg-10bit in the static build?
[23:15] <c_14> The bit depth x264 is compiled with.
[23:16] <nestolea> What is the default bit depth?
[23:16] <c_14> 8
[23:16] <nestolea> Thanks
[23:17] <nestolea> BTW: The PDF man pages are empty...
[23:25] <c_14> Ok, not sure why that's the case but the man pages are also all online: https://ffmpeg.org/documentation.html
[23:29] <nestolea> Yes, thats no problem.
[23:30] <nestolea> Anyhow. The static builds are such a very useful resource!
[23:31] <c_14> relaxed: any reason those pdfs are empty?
[23:31] <nestolea> I already rearranged my video conversion system to the latest ffmpeg version. All my problems are solved, already.   :-)
[23:39] <nestolea> You really helped me, thanks again.It's time for me to leave, now.
[23:40] Last message repeated 1 time(s).
[23:40] <nestolea> (Sorry for double posting...)
[23:42] <nestolea> bye!
[23:42] <c_14> \o
[00:00] --- Thu Dec 18 2014