[Ffmpeg-devel-irc] ffmpeg.log.20140807

[burek]

[02:29] <Baked_Cake> 16:47]	Baked_Cake: can any one give me so possible options for encoding mpeg2 interlaced video, im using ffmpeg
[02:29] <Baked_Cake> 7	Baked_Cake: so far im trying -flags +ilme+ildct
[02:29] <Baked_Cake> 7[16:48]	Baked_Cake: i cant seem to fid these optionss in the ffmpeg guide
[02:30] <c_14> If you want to interlace the video, you could try the interlace filter.
[02:34] <Baked_Cake> i was hoping to find a guide that autline each function and the syntax but i cant seem to find it
[02:34] <c_14> https://trac.ffmpeg.org/wiki/FilteringGuide
[02:34] <c_14> https://ffmpeg.org/ffmpeg-filters.html
[02:35] <Baked_Cake> thx ill take alook
[03:19] <Baked_Cake> do these commands on  http://ffmpeg.org/ffmpeg-filters.html#Filtergraph-description work for windows
[03:19] <Baked_Cake> im using batch files to run ffmpeg but im not quite getting the syntax right for stuff like yadif
[03:19] <ersatzbeardr> i'm using them
[03:20] <ersatzbeardr> on windows
[03:21] <ersatzbeardr> for example http://dpaste.com/0N9A745.txt (bat file)
[03:23] <Baked_Cake> ah i needed to add the ""  stuff that came after -vf
[09:43] <termos> I get a weird seeminly random crash in av_interleaved_write_frame when writing flv format to rtmp streams, seems to be crashing in avio_write when flushing some buffer.
[09:43] <termos> Anything I should watch out for here?
[10:20] <slowguy> i have an mkv(h264) video..i have extracted two segments out of it
[10:21] <slowguy> 1. a segment from non key-frame to a keyframe...which was supposed to be re-encoded
[10:21] <slowguy> 2. segment from a key frame to a key frame
[10:21] <slowguy> both of them play fine individually
[10:23] <slowguy> but when i join the two using concat muxer...combined video first plays fine but as soon as it reaches second part only green or grey or artifacts are seen
[10:23] <slowguy> someone please tell me what is wrong here
[11:16] <Lord> hi, i'm trying to record the audio from my computer with alsa (no pulseaudio). Is it possible to capture an output of alsa ?
[11:17] <DopeLabs> yes  http://trac.ffmpeg.org/wiki/Capture/ALSA
[11:20] <Lord> DopeLabs ’ arecord -l only shows capture devices from alsa, no output devices.
[11:25] <DopeLabs> alsamixer might be of use
[12:12] <[A3G1S]> Hey I am trying to statically link libass with FFmpeg, and getting this error ass_font.c:function ass_font_get_glyph: error: undefined reference to 'FT_GlyphSlot_Oblique'
[12:12] <[A3G1S]> can any help me with this ?
[12:37] <coalado> Hi there, I'd like to extrat an audiostream from a video without a special output format. I try:  ffmpeg.exe, -i, bla.audio.tmp, -acodec, copy, -vn, bla.audio, -y
[12:38] <coalado> ffmpeg says:
[12:38] <coalado> Stream #0:0: Video: h264 (High), yuv420p, 400x224, 26 kb/s, 30.33 fps, 29.97 tbr, 1k tbn, 59.94 tbc
[12:38] <coalado>     Stream #0:1: Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s
[12:38] <coalado> and Unable to find a suitable output format for 'bla.audio' any idea what might be wrong?
[12:40] <sfan5> tried ffmpeg -i audio.in -map 0:a -c copy -f rawvideo audio.out ?
[12:41] <DopeLabs> done use ,'s in your commands?
[12:41] <DopeLabs> *dont
[12:41] <DopeLabs> or does the windows version use commas
[12:44] <sfan5> I don't think you need commas
[12:45] <DopeLabs> ffmpeg -i input -vn -c:a copy output should really do te trick though.. if you dont specify a standard file extension such as output.m4a than you should prob specify the output format with -f
[13:50] <coalado> DopeLabs: I copy&pasted the commands from the ide debugger.. the commas just are the ids string array representation
[14:30] <termos> when calling av_copy_packet the AVPacket content does not seem to be copied. My copy is empty with AV_NOPTS_VALUE
[15:27] <slowguy> i have a key frame at 3.136 so i give this command
[15:27] <slowguy> G:\contribs\ffmpeg-20140731-git-d76675d-win64-shared\bin\ffmpeg.exe -ss 3.136 -i C:\wamp\www\manas/vids/dexter/dexter.mkv -to 3.3785 -c:v copy -an C:\wamp\www\manas/vids/dexter/dexter_2.mkv
[15:28] <slowguy> the extracted video starts from correct time i.e. 3.136 sec
[15:28] <slowguy> but its length is around 3 seconds
[15:29] <slowguy> but according to command it was supposed to be only 3.3785-3.136 = 0.2425 sec only
[15:29] <Mavrik> termos, see the source of that call, it's very simple
[15:29] <Mavrik> it's possible that your types aren't really correct :)
[15:29] <slowguy> can you help me ?
[15:31] <Mavrik> slowguy, do you have a keyframe at 3.3785?
[15:31] <slowguy> no
[15:32] <slowguy> next is at 5.405
[15:32] <DopeLabs> slowguy: http://superuser.com/a/141343
[15:32] <sacarasc> slowguy: Maybe try using -vframes
[15:33] <Mavrik> DopeLabs, that answer doesn't really help him when ffmpeg overruns the duration :)
[15:33] <Mavrik> yeah, -vframes could help
[15:33] <slowguy> actually i have read this post but it says about seek to a specific point but nothing is said about precision of --to option
[15:33] <Mavrik> but the probable issue is that ffmpeg just does the conservative thing when doing -copy and seeks to next IDR frame
[15:34] <iive> i think -to works like -t if the start time of the output file is 0
[15:35] <iive> i might be wrong.
[15:35] <Mavrik> of course it does :)
[15:36] <slowguy> --to option is not accurate?
[15:37] <slowguy> then how do we cut to a precise time?
[15:38] <iive> what i am trying to say is that the -to is not  end-time in the input, it is end-time in the output, so when the output starts at 0s time, then it works just like -t , aka it works as duration.
[15:38] <iive> you set it to 3.3s and it gives you 3 seconds.
[15:38] <slowguy> oh i see
[15:38] <iive> try -t 0.2425 and see if that works.
[15:39] <slowguy> give me a min please
[15:40] <slowguy> looks like it works
[15:42] <slowguy> so -t or -to options is always precise in any case with re-encoding or without re-encoding?
[15:44] <slowguy> actually what i was trying to do was cut a video from any location to any location without re-encoding the whole thing
[15:44] <slowguy> so i probed all key frames
[15:45] <slowguy> never mind
[17:53] <brontosaurusrex> interesting: "MPD uses a flat file database to maintain the basic music file information when it is not running. Once the daemon is started, the database is kept completely in-memory and no hard disk access is necessary to look up or search for local audio files"
[17:53] <brontosaurusrex> from http://en.wikipedia.org/wiki/Music_Player_Daemon
[17:54] <sacarasc> And..?
[17:55] <brontosaurusrex> wrong channel, sorry
[19:11] <br1> How do I silence the log lines avery few frames while encoding, while leaiving the resto of the info level lines?
[19:37] <DopeLabs> your looking for loglevel
[19:37] <DopeLabs> https://ffmpeg.org/ffmpeg.html#Generic-options
[19:40] <lovesax> h264 live streaming over http with ffserver... is it possible? I seem to be running into container-issues with all options.
[19:43] <DopeLabs> command?
[20:20] <br1> DopeLabs: I have loglevel = info,  If I lower it one notch to warning I lose some messages about the format of the input that I want.
[20:38] <DopeLabs> what/how much information do you need about your input that you cant decreas to warning
[20:40] <llogan> michaelni: i'm going to be gone from Aug 10-17, so it will probably be up to you to approve messages in ML queue (since compn always forgets).
[20:40] <llogan> unless someone else wants to volunteer
[20:41] <Dark-knight> !builds
[20:41] <llogan> i'll have no internet or mobile connection
[20:41] <Dark-knight> is there a command to show the link to different builds?
[20:41] <llogan> ah, i thought i was in -devel...
[20:42] <Dark-knight> nope
[20:42] <llogan> Dark-knight: /msg fflogger !help
[20:42] <Dark-knight> thanks
[20:52] <RedSpartan> Where do you find the ffserver download?
[20:55] <RedSpartan> I downloaded ffmpeg for windows but it didnt come with ffserver....is it the same thing? and google wont help me
[20:56] <Dark-knight> omg
[20:57] <Dark-knight> can i please have the windows link?
[20:58] <RedSpartan> http://ffmpeg.zeranoe.com/builds/win32/static/
[20:59] <Dark-knight> thanks
[21:00] <Dark-knight> dont know why fflogger couldnt give me that
[21:01] <RedSpartan> its on a different server than the linux static
[21:13] <llogan> that's an old anchor name...
[21:15] <RedSpartan> that just took me to the downloads page lol
[21:21] <RedSpartan> g2g
[21:25] <Dark-knight> why isn't there one that links straight to Zeranoe's dl page?
[21:33] <DopeLabs> its the very first hit googling 'ffmpeg windows builds'
[21:36] <llogan> http://ffmpeg.org/download.html#build-windows
[21:37] <llogan> i guess that didn't work like i expected.
[21:38] <Dark-knight> no it worked, i got the the windows dl page
[21:39] <Dark-knight> i just thought it should link directly to the windows page instead of going a roundabout way
[23:41] <phelps> just seen the new site, it really looks nice
[23:58] <jrgill> Trying a simple pan audio here by dropping the right channel but seems to be transcoding.  Shouldn't the operation be lossless?  ffmpeg.exe -i in.m4v -af pan="stereo:c0=c0" -c:v copy out.m4v
[23:58] <jrgill> cf. https://ffmpeg.org/ffmpeg-filters.html#Remapping-examples
[00:00] --- Fri Aug  8 2014