[Ffmpeg-devel-irc] ffmpeg.log.20130706

[burek]

[00:43] <b0fh_ua> Hello! How do I specify muxer option for gif muxer if the options with the same name is already used by image2pipe demuxer?
[01:51] <durandal_1707> b0fh_ua: just as usual, but make sure it is last option
[01:53] <durandal_1707> something like: ffmpeg -i in.gif -loop out.gif
[05:22] <nice4u88m> hello\
[05:40] <voltagex> hi, how do I get access to the screen-capture-recorder dshow device? I don't have it in -list_devices
[06:18] <Zeranoe> voltagex: did you install any directshow screen capture filters?
[06:19] <voltagex> Zeranoe: thanks for your builds! I'm not sure, it appears I may have. I'm not sure how to uninstall them (came with a DV camera)
[06:20] <Zeranoe> Please post the output of: ".\ffmpeg.exe -list_devices true -f dshow -i dummy" to http://paste.debian.net/
[06:21] <voltagex> http://paste.debian.net/14664/
[06:22] <voltagex> I've tried with 1.2 and the latest git build - both 32 bit shared. 64 bit builds can't enumerate DirectShow at all it seems
[06:24] <Zeranoe> voltagex: While FFmpeg's support for dshow is growing, I still prefer another method. I go grf graphedit file>avisynth script>ffmpeg input. I use two scripts, one for audio, one for video. It is a lot more steps but it will give you outstanding quality. Don't forget a vsync though. If you want to just stick with FFmpeg, what device did you want to capture from that list?
[06:28] <Zeranoe> voltagex: If you need any examples for that process let me know.
[06:33] <voltagex> holy crap, I tried to uninstall that filter
[06:33] <voltagex> and it hard locked my machine
[06:33] <voltagex> i.e. mouse stopped and PC fell off the network
[06:34] <voltagex> it's that the screen capture filter never even turns up
[06:34] <Zeranoe> voltagex: Are you sure it is installed?
[06:35] <voltagex> I couldn't find any instructions about what to install
[06:35] <voltagex> I'd like to work out how to uninstall this other filter first
[06:35] <voltagex> any ideas how to remove it manually?
[06:35] <Zeranoe> Which one?
[06:36] <voltagex> all Enosoft filters
[06:37] <Zeranoe> It would be a registry thing, I haven't tired manually removing any
[06:37] <voltagex> I'd be interested in this graphedit method, as it'd probably let me capture my TV card too
[06:38] <Zeranoe> voltagex: http://www.videohelp.com/download/graphedit10-090724.zip
[06:39] <voltagex> ...I'm actually going to do a Win8 Refresh & Reset first - this isn't the first odd  hang I've had
[06:40] <voltagex> but continue, as this IRC session is on a different machine so I'll still be able to read it
[06:40] <voltagex> :P
[06:42] <Zeranoe> voltagex: You'll need to install this dshow capture filter: http://www.umediaserver.net/bin/UScreenCapture.zip website is here: http://www.umediaserver.net/umediaserver/download.html
[06:42] <voltagex> *right*, so that's the first dshow filter I saw mentioned on the mailiing list
[06:44] <Zeranoe> voltagex: It has the most options, which you will be able to edit with graphedit
[06:44] <voltagex> cool
[06:44] <Zeranoe> voltagex: Best option I've found. I can record my 1080p screen without lag.
[06:44] <voltagex> I wonder what happens if I load a 3D game though
[06:45] <voltagex> oh. are multiple monitors going to mess it up?
[06:45] <Zeranoe> voltagex: Not sure, I can record HD videos no problem which are using a little.
[06:45] <Zeranoe> voltagex: Haven't tried that, it had options for multiple monitors, going to have to try.
[06:46] <voltagex> this machine is fubar.
[11:36] <kms> sorry, that now instead of a "-af" ?
[11:49] <kms> hey, enybody here?
[11:52] <kms> i need change audio volume
[11:55] <saste> kms, -af volume
[12:00] <kms> i have old build
[12:01] <Mavrik> get a new one.
[13:52] <silv3r_m00n> is it possible to record a specific window using such a command, avconv -f x11grab -s xga -r 30 -i :0 -c:v libx264 ~/session-recording.avi
[15:35] <silv3r_m00n> i am recoding desktop video using avconv, is it possible to pause it ?
[16:56] <kamal__> I am getting errors while compiling a simple code and the error seem to be linker-errors.. error output:
[16:56] <kamal__> ffmpeg2/libavformat/rtmppkt.c:446: undefined reference to `av_log'
[16:57] <kamal__> libavformat/id3v2.c:383: undefined reference to `av_dict_set'
[16:57] <kamal__> and so on for tens of functions
[16:58] <kamal__> My command was this: cc tut.c -lavcodec -lavutil -lavformat -lswscale
[16:58] <kamal__> I wish someone could help
[17:02] <saste> kamal__, move -lavutil towards the end
[17:04] <kamal__> still it gives same linking errors and maybe i was incomplete in my mentioning of errors, these errors come for both libraries avutil and avformat
[17:05] <kamal__> for e.g. libavutil/eval.c:304: undefined reference to `exp'                           and                       /libavformat/adxdec.c:51: undefined reference to `av_free_packet'
[17:09] <kamal__> I am a novice and am in the middle of some important project, so if someone can spare a little time, plz guide me in my linking errors
[17:22] <saste> kamal__, use pkg_config to compute the flags for ffmpeg
[17:22] <saste> exp -> -lmath
[17:22] <saste> check the Makefile in doc/examples
[17:53] <silv3r_m00n> while encoding i press ctrl+c to stop it, is it possible to resume encoding in the same file ?
[17:54] <silv3r_m00n> this is the command that is interrupted, ffmpeg -f x11grab -r 30 -s $(xwininfo -root | grep 'geometry' | awk '{print $2;}') -i :0.0 -vcodec libx264 -preset ultrafast -crf 0 -threads 0 -y screencast_out.avi
[17:54] <silv3r_m00n> basically i need to pause and resume recording
[21:58] <Mavrik> hmm, is it possible to tell ffmpeg to decode only I-frames?
[23:10] <mark4o> Mavrik: -skip_frame nokey
[23:11] <mark4o> but it is broken for h264; you need to use -vf 'select=eq(pict_type\,I)' for that
[23:11] <Mavrik> mhm, but select comes into effect after decoding
[23:11] <mark4o> right, -skip_frame nokey for pre-decoding
[23:12] <Mavrik> thanks
[23:31] <miguel_> Im trying to record from my webcam with ffmpeg with the command "ffmpeg -f alsa -f video4linux2 -i /dev/video0 -r 30 -i :0.0 -acodec pcm_s16le -vcodec libx264 -preset ultrafast -threads 0 cam_`date "+%d-%m-%Y\(%Hh%Mmin%S\)"`.mkv"
[23:31] <miguel_> but when I run it, I cant type q to exit
[23:31] <miguel_> is there a better way to record ?
[23:44] <miguel_> Im trying with "ffmpeg -f alsa -i pulse -f video4linux2 -r 30 -i /dev/video0 -acodec pcm_s16le -vcodec libx264 -preset ultrafast -threads 0 out.mkv", and it kinda works, but the audio is delayed
[00:00] --- Sun Jul  7 2013