[Ffmpeg-devel-irc] ffmpeg.log.20140108

[burek]

[01:10] <DX099> hello all, I'm trying to compile a program that uses libavcodec but I'm stumbling across this error while configuring "LIBAVCODEC_VERSION_MAJOR is not known at compile time in libavcodec.h"
[01:10] <DX099> any help ?
[04:23] <hwkns> hi all
[04:24] <hwkns> anyone available to help me out with a peculiar situation?
[04:24] <hwkns> http://pastebin.com/raw.php?i=6w7CEQx9
[04:24] <hwkns> ^ there's my command and the resulting output
[04:24] <hwkns> i am attempting to take screenshots of a video
[04:24] <hwkns> several other seek points in this same test file have produced good screenshots
[04:25] <hwkns> but this last one (using fast and accurate seeking to get to 4584 seconds) isn't producing anything
[04:27] <hwkns> no errors are reported either (besides the "Buffering several frames" message that i always see)
[04:27] <hwkns> the video is ~5100 seconds long, so the seek point should be valid
[04:40] <Zeranoe> Is there any reliable way to get the number of frames in a video?
[04:43] <sacarasc> Not really. Part of a file could be missing, so you'd get the wrong thing reported.
[04:50] <Plorkyeran> decoding the entire file and counting how many frames you get is quite reliable
[04:50] <Plorkyeran> merely parsing the headers for each frame is usually good enough
[04:50] <Plorkyeran> but still requires reading the entire file and so is still kinda slow
[04:51] <Zeranoe> how about bin\ffprobe.exe -show_streams -count_frames ?
[04:52] <Zeranoe> well, how accurate  is ffprobe
[04:53] <Plorkyeran> well "count frames" sounds like it parses the file and counts the number of frames it finds, so barring bugs it should be accurate
[04:57] <Zeranoe> Ok, how about changing the frame rate and then reading the number of frames in the resulting video? I tried piping with rawvideo to ffprobe with a -r change in FFmpeg but it is reporting invalid input data
[06:34] <eristisk> Hi all, I just encoded a video with an option vcodec = libx264 but the resulting MKV file has in the metadata that the ecoder is "Lavf55.19.104"
[06:34] <eristisk> Does that mean the video stream was encoded with the built-in FFmpeg H.264 encoder, or the external x264 library?
[06:35] <sacarasc> Run mediainfo on the file and it will tell you.
[06:37] <eristisk> Writing library                          : x264 core 138 r2363 c628e3b
[06:37] <eristisk> Seems it's ok
[06:38] <eristisk> I guess Lavf muxxed the MKV file
[06:38] <eristisk> Thanks sacarasc
[11:48] <zippo^> hello, can someone me help: how do I convert to MPEG-1? Adobe Premiere Pro has no MPEG-1, while well MPEG-2. I use Mac OS X
[11:49] <ubitux> mpeg-1? seriously? :)
[11:50] <re-G> tried -c:v mpeg1video
[11:50] <re-G> ?
[11:50] <zippo^> yes, ubitux
[11:50] <zippo^> via the terminal, re-G ?
[11:51] <zippo^> of mac os x?
[11:51] <re-G> zippo^: i mean ffmpeg command line parameter
[11:51] <zippo^> i have no very expierence about ffmpeg.i am beginner, re-G
[11:53] <re-G> zippo^: u can download ffmpeg for mac from ffmpeg.org. And with google you will find documentation and hundreds of examples to use ffmpeg
[11:55] <zippo^> thank you, re-G .
[11:55] <ubitux> why would you want to encode to mpeg-1 anyway&
[11:56] <ubitux> especially if your adobe tool is not supporting it
[11:56] <zippo^> my colleague needs mpeg-1, but i don't know why need he this. ubitux
[11:56] <ubitux> (apart from the fact mpeg-1 has huge constraints)
[11:57] <JEEB> pretty much no-one encodes spec-compliant MPEG-1 by now
[11:58] <re-G> sometimes somebody can need some legacy things
[13:57] <zippo^> )-:
[17:52] <kurkale6ka> Hi when using ffmpeg is there a way not to display the buil message?
[17:55] <lkiesow> kurkale6ka: Try 2&> /dev/null
[17:56] <kurkale6ka> yeah but that would hide potential errors
[17:56] <lkiesow> yep. Then try -loglevel
[17:57] <lkiesow> probably warning or error is what you want
[17:58] <kurkale6ka> you need at least info but that shows the build message too
[18:02] <lkiesow> Then I guess you have to use something like sed to modify the output
[18:03] <kurkale6ka> Cheers, it is not so important, it is just mildly annoying
[19:55] <llogan> lkiesow: if you see him again mention -hide_banner
[20:25] <lkiesow> &will do that
[21:04] <xlinkz0> what does tbc mean?
[21:04] <xlinkz0> 25 tbr, 10k tbn, 50 tbc
[23:07] <undercash> hi
[23:11] <undercash> i m interested to realize this
[23:11] <undercash> http://stackoverflow.com/questions/11647868/using-ffmpeg-to-stream-continuously-videos-files-to-a-rtmp-server?rq=1
[23:11] <undercash> anybody has a concrete example how to do it?
[00:00] --- Thu Jan  9 2014