[Ffmpeg-devel-irc] ffmpeg.log.20140128

[burek]

[00:38] <madmouse> hi all, I have compiled ffmpeg from source on Linux Mint (but it seem I have the compiled version and the other avconv version),
[00:38] <madmouse> how do I get rid of the avconv version or set the path to use the compiled one
[00:38] <madmouse> from ~/ffmpeg_sources/ffmpeg I get : ffmpeg version git-2014-01-27-c94ed2a Copyright (c) 2000-2014 the FFmpeg developers
[00:39] <madmouse> from e.g. ~/kde/build/amarok > ffmpeg I get : ffmpeg version 0.8.9-6:0.8.9-0ubuntu0.13.10.1, Copyright (c) 2000-2013 the Libav developers
[00:45] <saste> madmouse, http://trac.ffmpeg.org/wiki/GenericCompilationGuide#Installpath
[00:45] <madmouse> thanks sastelet me go read
[00:45] <madmouse> thanks saste let me go read
[00:46] <saste> madmouse, in other words you need to install the package or use a custom PATH
[00:47] <Tawre> hopefully someone won't bite my head off for this: i encoded some images into a video with
[00:48] <Tawre> ffmpeg -r 30 -i image-%3d.png -vcodec libx264 out.mp4
[00:48] <Tawre> it works fine in standalone video players i have but it won't work for html5 video players in chrome or firefox. should it not work or am i doing something wrong?
[00:50] Action: saste bites the head off of tawre
[00:50] <saste> Tawre, -pix_fmt yuv420p?
[00:51] <Tawre> okay, some old version of gomplayer won't show it correctly, but all the rest i tried worked fine
[00:51] <Tawre> saste, i didn't touch anything like that
[00:52] <madmouse> thanks saste adding the path to the compiled ~/ffmpeg_sources/ffmpeg PATH env variable
[00:53] <saste> Tawre, you probably should, since ffmpeg will generate yuv444p in some cases, which is not supported by many players
[00:53] <saste> btw current version of ffmpeg warns you about that
[00:54] <saste> madmouse, i'm glad the guide i wrote is useful
[00:54] <madmouse> :-)
[00:54] <Tawre> saste, thank you a lot
[00:56] <Tawre> saste, i grabbed the latest compiled windows x64 binary - i either didn't notice or it wasn't there
[00:56] <Tawre> but i might've just not noticed; anyways thanks a lot! works now
[01:27] <madmouse> saste: I must be stupid or something
[01:27] <madmouse> I added
[01:27] <madmouse> export AVFORMAT_LIBRARIES=$HOME/ffmpeg_build/lib/
[01:27] <madmouse> export AVFORMAT_INCLUDE_DIRS=$HOME/ffmpeg_build/include/
[01:28] <madmouse> to my .bashrc
[01:28] <madmouse> and
[01:28] <madmouse> export PATH=$HOME/ffmpeg_build:$PATH
[01:28] <saste> AVFORMAT_LIBRARIES what's this??
[01:29] <madmouse> ah sorry yeah I am trying to compile Amarok (that is the end goal)
[01:29] <madmouse> but want to compile ffmpeg for Amarok and general use
[01:29] <saste> you need to reload your bashrc with . .bashrc
[01:29] <madmouse> aaah
[01:29] <saste> don't know nothing about amarok
[01:33] <madmouse> grr let me reboot I suspect the bashrc not relaoding correct
[01:33] <madmouse> tnx for help saste
[01:34] Action: saste going to sleep
[09:34] <thoonai> hello. does I can use ffmpeg to encode mpeg2 on openCL graphic cards?
[09:36] <Ris> could someone help with this error code http://pastebin.com/Us9AbQS5
[09:37] <thoonai> I have a project which needs to have 12++ streams encoded in mpeg2. so I'm not sure if to buy an AMD octa core or a decent graphics card
[09:52] <thoonai> gotta go
[11:36] <sspiff> is there a way to extract exactly one frame from every video stream in a container?
[11:37] <sspiff> I "ffmpeg -i samples/trace_GbE2_03.cap -map 0:v -f image2 -frames:v 1 test-%03d.jpeg", but that just does one frame overall
[11:45] <relaxed> sspiff: with scripting
[11:46] <sspiff> relaxed: alright, that's what I'm doing
[11:46] <sspiff> just figured I'd ask in case there was a simple flag I could pass
[11:47] <relaxed> Not that I'm aware of
[11:47] <sspiff> then I'll just continue down this road
[11:57] <relaxed> sspiff: did you get it?
[11:58] <Ris> could someone help with this error code http://pastebin.com/Us9AbQS5
[12:02] <relaxed> Ris: what is yo.mp4 doing there?
[12:02] <Ris> do i need it there
[12:03] <sspiff> relaxed: I have a bash script that calls ffmpeg and works fine on my samples
[12:03] <sspiff> no magic flag as of yet
[12:03] <Ris> took it out give me the same error
[12:03] <relaxed> yeah, I did it with awk
[12:04] <relaxed> Ris: you have ffmpeg twice
[12:06] <Ris> opps
[12:08] <Ris> http://cast7.eu/index/stream/name/cast101
[12:08] <Ris> no video
[12:08] <Ris> but good audio
[19:12] <ChocolateArmpits> Can it be said that a picture resize 2 times both vertically and horizontally smaller is faster than, let's say, 1.5 times both horizontally and vertically ?
[19:13] <ChocolateArmpits> Or is the operation really dependent on the resize filter?
[19:13] <ChocolateArmpits> that is operation speed
[19:25] <clever> ChocolateArmpits: i would think that resizing by an int (2x 3x) would be faster then a float (1.5x), since it can just copy pixels, rather then blend
[19:26] <clever> but you also have to consider the size of the output image and the bandwidth that will take up
[19:40] <ChocolateArmpits> clever, I had in mind resize operation only
[19:43] <ChocolateArmpits> So if we agree with that, can we say that a resize 1.5 times could be faster than 1.38 times? Or will we see diminishing returns if we go deeper after the decimal point?
[19:52] <clever> i would think that 1.38 would use more cpu then 1.5, since the blending is more complex
[19:52] <clever> 1.5 bigger is 2 pixels in 3 pixels out, so its a rather simple blend
[19:53] <clever> but 1.5x would use more time in the final memcpy of the frame
[19:53] <clever> and the encoding (yuv, rgb) also complicates things
[19:53] <clever> simplest answer, measure it!
[19:53] <ChocolateArmpits> I will most obviously
[19:54] <ChocolateArmpits> Just want to theoretically ponder before that
[19:54] <clever> if you make it 1.5 times bigger, it would take a 2x2 pixel input and create a 3x3 pixel output
[19:55] <clever> so it would have to blend the 4 pixels together end create a new grid of 9 pixels
[19:55] <clever> but 1.38x bigger would be more complex to blend and possibly take more cpu
[19:55] <clever> but it depends on how it implements the blending
[19:56] <ChocolateArmpits> the filter you mean?
[19:56] <clever> yeah
[19:56] <bneff> I'm using ffmpeg-1.2.5, and I'm getting a consistent crash with av_packet_get_side_data.  Is this the appropriate place to help troubleshoot?
[20:01] <llogan> bneff: does it also crash using ffmpeg from git master?
[20:02] <relaxed> bneff: http://johnvansickle.com/ffmpeg/
[20:03] <bneff> llogan: I'll check.  relaxed: thx
[20:04] <relaxed> Umm, those are my static builds. I doubt they'll be useful to you.
[20:05] <llogan> relax, don't worry, have a homebrew.
[20:06] <relaxed> I love beer
[20:06] <bneff> relaxed: Ok, I wasn't sure why you sent it, but I was just being nice haha
[20:07] <relaxed> it dawned on me after pasting it... ;)
[22:19] <fundies> can ffmpeg rip a vobsub with an idx too?
[00:00] --- Wed Jan 29 2014