[Ffmpeg-devel-irc] ffmpeg.log.20150228

[burek]

[00:25] <sdep> hi all, is it possible to convert vob files to avi with ffmpeg?
[00:25] <c_14> Single or multiple?
[00:25] <sdep> I have single vob files
[00:25] <c_14> ye, should be possible
[00:25] <sdep> i mean i want one vob to one avi
[00:25] <sdep> I don't need to merge
[00:26] <c_14> ye, should be possible
[00:26] <sdep> just I'm using in Blender and it really doesn't like vob
[00:26] <sdep> do mess with sync :(
[00:26] <sdep> c_14: do you know how to do that? I was using mencoder but it does convert out of sync
[00:26] <sdep> I used this syntax
[00:27] <sdep> mencoder saggio-1.vob -oac copy -ovc x264 -o saggio-1.avi
[00:27] <c_14> ffmpeg -i saggio-1.vob -map 0 -c copy out.avi
[00:27] <c_14> Do you want to reencode the video?
[00:27] <sdep> and gets a lot of duplicated frames
[00:28] <sdep> well I have one single big vob, I merged the vob from a DVD
[00:28] <sdep> and I already used a script to extract only some parts
[00:28] <sdep> but I used like this
[00:28] <sdep> ffmpeg -i saggio.vob -ss $begin -to $end -c copy saggio-$n.vob
[00:28] <sdep> in a loop
[00:29] <sdep> so or I can change it here or convert the already stripped vob
[00:29] <sdep> what do you think is best?
[00:29] <c_14> shouldn't really matter
[00:29] <sdep> ah ok
[00:30] <sdep> so I will the pieces thanks c_14
[00:32] <sdep> awesome, it works fine
[10:11] <cpunerd> how come sometimes ffmpeg converts my video and it will have no picture and then a different video works perfect
[10:11] <cpunerd> does every video with different codecs require diff ffmpeg conversion settings?
[12:21] <hendry> hi there, what's a good "dumping"/fast intermediate format to record to? I have been using '-vcodec ffvhuff' successfully, but lately when I playback it skips in mplayer
[12:22] <hendry> mplayer error is http://ix.io/gCw
[12:22] <hendry> when I've encoded it to mp4, it plays back just fine
[13:10] <Man11> I have a full hd image and audio files (aac & mp3 formats available). I want to make a full hd video with a still picture for youtube uploads. Can you recommend a good command that doesn't use a ton of system ressources?
[13:11] <Man11> Is " -loop 1 -i image-file.jpg -i audio-file.m4a -shortest -acodec copy -f mov video-file.mov" a good way to go?
[15:20] <grepper> I wouldn't recomend using ls
[15:27] <Shells> is there any way of using ffmpeg in a similar way to -vcodec copy -acodec copy however it will fix any errors in the stream (such as adding blank frames (audio or video) if there is corruption in a frame) but without otherwise changing the streams ...?
[16:28] <xzczx> benjojo how are you ?
[16:28] <Benjojo> Who are you?
[16:29] <xzczx> bentoto
[16:29] <Benjojo> ok
[16:29] <xzczx> you dont remember me ?
[16:30] <Benjojo> No I do not
[16:30] <xzczx> im from sponge bob familiy
[16:34] <xzczx> i was the first man in the glob using " sponge bob " as input device using ffmpeg
[16:34] <xzczx> it s just joking
[18:46] <RobotsOnDrugs> is there some special way to invoke the eq filter? (http://ffmpeg.org/ffmpeg-filters.html#toc-eq)
[18:46] <RobotsOnDrugs> it tells me there is no eq filter, but i have no issue invoking other filters
[18:48] <RobotsOnDrugs> -vf "fps=fps=film, yadif=mode=0:deint=1" works as expected, but -vf "fps=fps=film, yadif=mode=0:deint=1, eq=gamma=0.5" spits out an error proclaiming there is no eq filter
[18:48] <c_14> How old is your build?
[18:48] <c_14> The eq filter was ported Jan 19
[18:49] <RobotsOnDrugs> ffmpeg version 2.5.4 Copyright (c) 2000-2015 the FFmpeg developers
[18:50] <c_14> Not going to be new enough.
[18:50] <c_14> You'll need a recent git build.
[18:51] <c_14> You can try the static build until it gets into the next release.
[18:51] <RobotsOnDrugs> didn't realize it was such a new filter
[18:52] <c_14> It was ported from mplayer filters to ffmpeg native.
[18:52] <c_14> You can probably still access the old version under mp=eq
[18:52] <RobotsOnDrugs> alright, thanks
[18:54] <RobotsOnDrugs> yep, it works, and this video is much improved with the gamma lowered a bit
[19:17] <m3gab0y> hi guys, anyone of you familiar with the filter complex switches and their usage?
[19:17] <c_14> What seems to be the problem?
[20:08] <dericed> what is the proper capitalization of ffv1? FFV1, FFv1, Ffv1?
[20:20] <m3gab0y> c_14 I have 2 synchronized video streams that have the same content (a recording from a TV show from 2 different channels that air the same show),  and I want to remove the channel logos (they are at different positions of the screen), how can I achieve that?
[20:22] <c_14> '[0:v:0]delogo=x:y:w:h[v1];[0:v:1]delogo=x2:y2:w2:h2[v2]' -map '[v1]' -map '[v2]'
[20:30] <m3gab0y> No such filter: 'delogo'
[20:30] <m3gab0y> version 2.5
[20:33] <c_14> Is it in ffmpeg -filters | grep delogo ?
[22:41] <Sonny_Jim> Hmm, I'm getting a segfault when using avcodec_copy_context in libcofi on a Raspberry Pi?
[22:42] <BtbN> I don't know, do you?
[22:43] <Sonny_Jim> I do
[22:44] <Sonny_Jim> Working from this tutorial;
[22:44] <Sonny_Jim> http://dranger.com/ffmpeg/tutorial01.html
[22:44] <Sonny_Jim> Everythings hunky dory until I get to the avcodec_copy_context bit
[22:45] <BtbN> This page says (C)2003, not too sure about how recent the code is.
[22:46] <Sonny_Jim> Ah ok
[22:46] <BtbN> The Code looks fine on a first quick look
[22:47] <Sonny_Jim> I found an updated version of it here;
[22:47] <Sonny_Jim> https://raw.githubusercontent.com/phamquy/FFmpeg-tutorial-samples/master/tutorial01.c
[22:48] <Sonny_Jim> But that fails to compile with;
[22:48] <Sonny_Jim> /usr/bin/ld: /tmp/ccCKqPJN.o: undefined reference to symbol 'av_malloc@@LIBAVUTIL_52'
[22:48] <Sonny_Jim> //usr/lib/arm-linux-gnueabihf/libavutil.so.52: error adding symbols: DSO missing from command line
[22:50] <Sonny_Jim> Ah nevermind, it was missing some libs
[22:51] <Sonny_Jim> Still segfaults though
[22:51] Action: Sonny_Jim scratches head
[22:51] <BtbN> Well, ask a debugger
[22:54] <Sonny_Jim> I have, seems it fails on avformat_open_input
[22:54] <Sonny_Jim> So maybe I have a crappy file or something
[22:56] <Sonny_Jim> Nope, seems to segfault no matter what file I try
[22:56] <Sonny_Jim> 0xb6f81c84 in avformat_open_input () from /usr/lib/arm-linux-gnueabihf/libavformat.so.54
[22:58] <BtbN> I'd guess pFormatCtx is missing an initialization to NULL.
[23:00] <Sonny_Jim> Ah right you are
[23:00] <Sonny_Jim> Thanks
[23:59] <shevy> yesterday I got greyscale to work with ffmpeg
[23:59] <shevy> Ders helped me... hmm he is not here right now :(
[00:00] --- Sun Mar  1 2015