[Ffmpeg-devel-irc] ffmpeg.log.20140224
burek
burek021 at gmail.com
Tue Feb 25 02:05:01 CET 2014
[01:01] <Snowleaksange> ok got video x264 flv video streaming working to my browser
[01:01] <Snowleaksange> not yet audio tho
[01:01] <Snowleaksange> last major issue w ffmpeg upgrade for osx
[01:01] <Snowleaksange> FFMpeg: Crushing your soul for an entire weekend every 2 years in exchange for streaming capabilities
[01:02] <Snowleaksange> if i can finish audio encoding, some minor guess_format issue, and windows porbability by tonight, ill have upgraded ffmpeg in a single weekend
[01:05] <Snowleaksange> i msut admit the code and the binary build distribution both seems more professional
[01:05] <Snowleaksange> as does the resampling lib
[01:34] <rjp421> Snowleaksange, streaming to a server?
[02:33] <Logicgate> Hey guys, is closed captioning stored in a separate file or it is extractable from an actual video
[02:49] <rcombs> Logicgate: "closed captioning" is used to mean a lot of things, some of which are correct meanings of that term. What are you referring to, more specifically?
[02:53] <Hello71> strictly speaking, closed captioning must be stored separately
[02:53] <Hello71> or else it's just captioning.
[02:56] <rcombs> Hello71: captions can definitely be stored in the same file as the video they accompany and still be closed
[02:56] <rcombs> just as long as they're not burned into the video stream
[02:58] <Hello71> "separately", not "separate file"
[02:58] <Hello71> one file is still separately ;)
[02:59] <rcombs> ah, I misparsed
[03:00] <Hello71> poor wording. :)
[03:26] <DjMadness> i seam to be having issues doing any sort of video playback, ie mplayer2 does not do any playback, same with dragonplayer the image is shown when i fast forward, but the actual playback does not happen (in xbmc the audio plays but there is a black screen where the video should be), has anyone heard of this before and is there a solution to this ?
[03:27] <DjMadness> hard to explain 100% its like the video is paused in mplayer2 and dragonplayer
[04:01] <oxez> hello, is there a parameter that would let me grab my second monitor (1920x1080, +1920 on X axis) and resize on the fly? The --video_size switch only changes the area that's grabbed, it does not resize
[04:01] <oxez> ffmpeg -r 30 -f x11grab -i :0.0+1920,0 -q:v 1 output.avi -- that's what I'm using right now
[05:16] <krabador> hi people, i've http://pastie.org/8763696
[05:16] <krabador> when i try to compile xbmc git
[05:28] <llogan> krabador: install yasm
[05:29] <krabador> llogan, i'm using archlinux x86_64
[05:29] <llogan> oxez: use the scale video filter as an output option: -vf scale=1280:-1
[05:29] <krabador> and i've ffmpeg installed
[05:30] <llogan> oxez: http://ffmpeg.org/ffmpeg-filters.html#scale
[05:30] <llogan> krabador: the If you think configure made a mistake...
[05:30] <llogan> is from FFmpeg
[05:35] <krabador> llogan, thanx
[05:35] <krabador> i installed yasm
[05:35] <krabador> and it works
[05:35] <llogan> it's probably not using your ffmpeg
[05:36] <llogan> but downloading the source and compiling it just for xbmc.
[05:36] <llogan> --enable-external-ffmpeg would have been worth a try
[05:36] <llogan> or just use xbmc from community repo
[05:37] <krabador> llogan, i tried, before asking here
[05:37] <krabador> to use --enable-external-ffmpeg
[05:37] <krabador> but nothing
[05:37] <krabador> llogan, i'm compiling the git , because radeon vdpau support
[05:37] <llogan> did you also add "export PKG_CONFIG_PATH=/usr/lib/ffmpeg-compat/pkgconfig:$PKG_CONFIG_PATH"?
[05:38] <krabador> no
[05:38] <llogan> that's from xbmc PKGBUILD, but the path would be your ffmpeg path
[05:39] <llogan> perhaps moddifying xbmc from ABS would have been a better method
[05:40] <llogan> than xbmc-git. anyway, #archlinux is probabaly a more appropriate channel for this since it's not really a FFmpeg issue.
[05:40] <llogan> or #xbmc
[05:40] <krabador> llogan, yuo help me , you don't know how much, to understand the problem
[05:41] <krabador> llogan, light years more than #archlinux, and #xbmc
[05:42] <Snowleaksange> hmm frame->data == NULL in mp3lame_encode_frame
[05:42] <llogan> krabador: i tend to also look at the PKGBUILDS in the official repositories before using a similar package in AUR
[05:42] <llogan> or make my own if the AUR stuff is retarded
[05:42] <krabador> llogan, i look at PKGBUILD of xbmc-git on aur
[05:42] <Snowleaksange> somehow magically different params in mp3lame_encode_frame then my call to avcodec_encode_audio2
[05:43] <krabador> and i installed all dependencies inside it
[05:43] <llogan> i guess the maintainer should also add yasm as a dependency.
[05:43] <krabador> yes
[05:44] <krabador> with yasm, my configure is gone right
[05:44] <krabador> <llogan> or make my own if the AUR stuff is retarded --- that's what i want learn , ad this time
[05:48] <llogan> krabador: you can adopt and maintain a simple package. that's a good way to learn.
[05:49] <krabador> llogan, with git, you mean?
[05:50] <llogan> no, i meant a package from AUR. i assumed you wanted to learn how to write PKGBUILD
[05:51] <krabador> yes
[05:51] <krabador> i was wrong, excuse me.
[08:06] <sara> How I do wirte scrip for rip dvd while when I click right on inpute file , ffmpeg get name of file automatic as input in comman line ?
[08:08] <sara> Is anybody here ?
[09:10] <sspiff> hi, I'm trying to decode teletext subtitles, and I'm getting subtitles out, but they seem to contain nothing.
[09:11] <sspiff> format is 0 (which I think is image based?), and there are 0 rects...
[09:12] <cbreak> https://gist.github.com/cbreak-black/39e971057667d86d85f3, this crash has cost me hours of pain...
[09:12] <cbreak> it really does seem though that there is a bug in ffmpeg as suspected.
[09:17] <cbreak> so, updated it to an even smaller test case
[09:26] <cbreak> originally my code was nicely wrapped C++ with real objects, RAII for memory management and so on.
[09:26] <cbreak> this test case is just a stripped down version, I am aware it leaks resources.
[09:29] <cbreak> the ffmpeg I use is built without optimization so it is probably not a bug in the optimizer
[09:46] <Snowleaksange> windows portability went smooth
[09:46] <Snowleaksange> ffmpeg 90% upgraded
[09:48] <ubitux> cbreak: can you submit a bug report?
[09:49] <ubitux> well, let me test first..
[09:52] <ubitux> cbreak: btw, av_malloc
[09:53] <ubitux> i can reproduce the problem though
[09:53] <cbreak> what's with av_malloc?
[09:53] <ubitux> malloc will have align
[09:53] <ubitux> but yeah it doesnt help
[09:53] <ubitux> just a moment
[10:02] <ubitux> cbreak: reproduced with http://pastie.org/8764613
[10:02] <ubitux> looks indeed fishy
[10:03] <cbreak> it works if I disable avx/avx2 and mmx
[10:06] <cbreak> it was quite troublesome to isolate, because in my real code, it randomly worked, and only broke on about 1% the frames.
[10:06] <cbreak> (Maybe because the C++ code overallocated some data buffers for efficiency)
[10:07] <ubitux> i'm trying to reproduce with ffmpeg
[10:08] <cbreak> I didn't manage that
[10:12] <ubitux> yeah seems not reproducible for some reason
[10:12] <ubitux> probably because avpicture_alloc doesn't allocate enough padding while other builtins do
[10:13] <cbreak> there should not be need for any padding :/
[10:14] <ubitux> i'm going to open a ticket
[10:19] <ubitux> arrh trac locked.
[10:20] <ubitux> cbreak: try to call av_image_alloc() instead
[10:20] <ubitux> with an align of 32 or something
[10:30] <cbreak> ubitux: the memory I get from new is 4kb aligned I think
[10:30] <cbreak> exactly 375 pages
[10:32] <cbreak> hmm. no.
[10:34] <cbreak> 1125 pages of course
[10:37] <cbreak> I guess that's the problem: if the image size is an exact multiple of the page size, then there will be no invalid-but-still-readable memory after the data, so even an off-by-one crashes.
[11:23] <ubitux> cbreak: http://trac.ffmpeg.org/ticket/3413
[11:24] <cbreak> thanks. I think the problem is not in the allocation but the out-of-bound access
[11:25] <sspiff> is there any example code to using/configuring the teletext subtitle decoder? Do I need to do something special somehow? I'm using a minimally adapted test program based on doc/examples/demuxing_decoding.c, which worked fine for DVB subtitles.
[11:25] <cbreak> after all, even with highly aligned storage it fails here
[11:26] <ubitux> cbreak: align is about the padding
[11:26] <cbreak> my input is page-padded
[11:27] <cbreak> the input consumes an exact number of pages
[14:44] <sspiff> How can I change the options associated with a priv_class of a codec?
[14:45] <sspiff> I'm assuming codec->priv_class shouldn't be accessed directly?
[15:29] <julienb> Hello the room
[15:29] <julienb> I contact you because i would like to know if it's possible to cut videos from the end with ffmpeg.
[15:33] <Keshl> Yes, easily, just specify -t (seconds) for however long you want a video to last.
[15:34] <ubitux> "from the end" is not easy
[15:34] <julienb> kesh1, what i want to do is declare an offset 10mn from the end
[15:34] <ubitux> ffmpeg is "stream based"
[15:34] <julienb> and then cut 10mn
[15:34] <ubitux> there is often no end
[15:34] <ubitux> and in a lot of formats, you can't tell when the end is
[15:35] <ubitux> so you have to obtain an (estimation/fast accurate-duration/slow) in a first pass
[15:35] <julienb> they are all mp4 format
[15:35] <ubitux> also duration of the container doesn't always match duration of the streams
[15:35] <ubitux> so... per case.
[15:36] <julienb> so it's not possible to do that?
[15:36] <ubitux> it is, on a per case basis
[15:37] <Keshl> It's possible, but you'll essentially have to go through the video twice. First ffmpeg has to figure out where the end (and thus, "ten minutes before") actually is.
[15:37] <Keshl> As for how to do that, I haven't got a clue. xwx..
[15:38] <ubitux> julienb: try ffprobe -v error -of flat -show_entries format=duration:stream=duration foobar.mp4
[15:38] <julienb> ok thanks
[15:38] <ubitux> this will give you all the estimated/stored durations in the format
[15:38] <ubitux> they might not be accurate
[15:38] <ubitux> deal with that
[15:38] <julienb> i will try it ubitux
[15:39] <julienb> ubitux i have to replace format and duration to something?
[15:40] <julienb> in your line command
[15:40] <ubitux> no
[15:40] <ubitux> just copy paste the command with your input
[15:40] <julienb> ok
[15:40] <ubitux> you'll get what i mean
[15:41] <ubitux> julienb: http://pastie.org/pastes/8767231/text
[15:41] <ubitux> this is what i get here
[15:41] <ubitux> as you can see, each stream has a different duration
[15:41] <ubitux> and the presentation (format) duration is one of them
[15:41] <ubitux> not the smallest, no the biggest...
[15:42] <julienb> Unrecognized option 'of'
[15:42] <julienb> Failed to set value 'flat' for option 'of'
[15:42] <ubitux> you're not up-to-date
[15:43] <ubitux> anyway, when you have that value you substract the time you want and ffmpeg -ss ... -i foobar.mp4 -c copy out.mp4
[15:43] <julienb> i have to update my ffmpeg version?
[15:44] <julienb> oh yes with that value i can do what i want with the normal command
[15:45] <julienb> this value is in second?
[15:47] <ubitux> yes
[15:47] <ubitux> and yes
[15:48] <ubitux> what ffmpeg version are you running?
[15:50] <julienb> second i will tell you
[15:53] <julienb> ubitux: 0.10.6 on gentoo distrib
[15:53] <ubitux> this is more that 2 years old
[15:54] <julienb> oh
[16:03] <Taiko3615> Hi :-) somebody here ?
[16:04] <Taiko3615> I am using ffmpeg in an android application, and I would need some help to optimise a command line. Here's what I currently use : libffmpeg.so -y -i compiledAndMusic.mp4 -i overlay_video_720p.png -filter_complex overlay -strict -2 compiledWithO
[16:05] <Taiko3615> But sadly the encoding takes wayyyyy too long, like 10 minutes for a 25s video, (0,9 fps) is there a way to optimise it ? Thanks !!!
[16:05] <Taiko3615> libffmpeg.so -y -i compiledAndMusic.mp4 -i overlay_video_720p.png -filter_complex overlay -strict -2 compiledWithOvelray.mp4
[17:43] <SianaGearz> helloes. would you like to recommend me a codec? or give me some guidelines to design one myself possibly. my requirements: encoding performance: can tage ages, that's OK; decoding: must be frugal enough for 200MHz SH4 at SD resolution. bonus points for extra CPU time left over :P decent compression is a goal.
[17:44] <SianaGearz> preferably without too much tendency for blockiness.
[17:46] <SianaGearz> i guess snow is kinda slow?
[17:59] <Taiko3615> Hmm.. I guess not so many active ffmpeg guys here.
[17:59] <Taiko3615> mostly people asking questions
[18:51] <jluttine> for testing, i'm using these four png files: http://users.ics.aalto.fi/jluttine/ffmpeg/
[18:51] <jluttine> (identical files)
[18:51] <Taiko3615> do you know a bit of java ?
[18:51] <jluttine> and then: ffmpeg -r 1 -i test%01d.png test.mpg
[18:51] <jluttine> Taiko3615: me? a bit
[18:51] <Taiko3615> because I use a java library that calls ffmpeg. here is the function that create a slideshow
[18:51] <jluttine> i've tried other formats too: mpg, mp4, avi
[18:51] <Taiko3615> public Clip createSlideshowFromImagesAndAudio (ArrayList<Clip> images, Clip audio, Clip out, int durationPerSlide, ShellCallback sc) throws Exception
[18:51] <Taiko3615> {
[18:51] <Taiko3615> final String imageBasePath = new File(mFileTemp,"image-").getCanonicalPath();
[18:51] <Taiko3615> final String imageBaseVariablePath = imageBasePath + "%03d.jpg";
[18:51] <Taiko3615>
[18:51] Last message repeated 1 time(s).
[18:51] <Taiko3615> ArrayList<String> cmd = new ArrayList<String>();
[18:51] <Taiko3615>
[18:51] <Taiko3615>
[18:51] <Taiko3615> String newImagePath = null;
[18:51] <Taiko3615> int imageCounter = 0;
[18:51] <Taiko3615>
[18:51] <Taiko3615> Clip imageCover = images.get(0); //add the first image twice
[18:51] <Taiko3615>
[18:51] <Taiko3615> cmd = new ArrayList<String>();
[18:51] <Taiko3615> cmd.add(mFfmpegBin);
[18:51] <Taiko3615> cmd.add("-y");
[18:51] <Taiko3615>
[18:51] <Taiko3615> cmd.add("-i");
[18:51] <Taiko3615> cmd.add(new File(imageCover.path).getCanonicalPath());
[18:51] <Taiko3615>
[18:51] <Taiko3615> if (out.width != -1 && out.height != -1)
[18:51] <Taiko3615> {
[18:51] <Taiko3615> cmd.add("-s");
[18:51] <Taiko3615> cmd.add(out.width + "x" + out.height);
[18:51] <Taiko3615> }
[18:51] <Taiko3615>
[18:51] <Taiko3615> newImagePath = imageBasePath + String.format(Locale.US, "%03d", imageCounter++) + ".jpg";
[18:51] <Taiko3615> cmd.add(newImagePath);
[18:51] <Taiko3615>
[18:51] <Taiko3615> execFFMPEG(cmd, sc);
[18:51] <Taiko3615>
[18:51] <Taiko3615> for (Clip image : images)
[18:51] <Taiko3615> {
[18:51] <Taiko3615> cmd = new ArrayList<String>();
[18:51] <Taiko3615> cmd.add(mFfmpegBin);
[18:51] <Taiko3615> cmd.add("-y");
[18:51] <Taiko3615>
[18:51] <Taiko3615> cmd.add("-i");
[18:51] <Taiko3615> cmd.add(new File(image.path).getCanonicalPath());
[18:51] <Taiko3615>
[18:51] <Taiko3615> if (out.width != -1 && out.height != -1)
[18:51] <Taiko3615> {
[18:51] <Taiko3615> cmd.add("-s");
[18:51] <Taiko3615> cmd.add(out.width + "x" + out.height);
[18:51] <Taiko3615> }
[18:51] <Taiko3615>
[18:51] <Taiko3615> newImagePath = imageBasePath + String.format(Locale.US, "%03d", imageCounter++) + ".jpg";
[18:51] <Taiko3615> cmd.add(newImagePath);
[18:51] <Taiko3615>
[18:51] <Taiko3615> execFFMPEG(cmd, sc);
[18:51] <Taiko3615>
[18:51] Last message repeated 1 time(s).
[18:51] <Taiko3615> }
[18:51] <Taiko3615>
[18:51] <Taiko3615> //then combine them
[18:51] <Taiko3615> cmd = new ArrayList<String>();
[18:51] <Taiko3615>
[18:51] <Taiko3615> cmd.add(mFfmpegBin);
[18:51] <Taiko3615> cmd.add("-y");
[18:51] <Taiko3615>
[18:51] <Taiko3615> cmd.add("-loop");
[18:51] <Taiko3615> cmd.add("0");
[18:51] <Taiko3615>
[18:51] <Taiko3615> cmd.add("-f");
[18:51] <Taiko3615> cmd.add("image2");
[18:51] <Taiko3615>
[18:52] <Taiko3615> cmd.add("-r");
[18:52] <Taiko3615> cmd.add("1/" + durationPerSlide);
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add("-i");
[18:52] <Taiko3615> cmd.add(imageBaseVariablePath);
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add("-strict");
[18:52] <Taiko3615> cmd.add("-2");//experimental
[18:52] <Taiko3615>
[18:52] <Taiko3615> String fileTempMpg = new File(mFileTemp,"tmp.mpg").getCanonicalPath();
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add(fileTempMpg);
[18:52] <Taiko3615>
[18:52] <Taiko3615> execFFMPEG(cmd, sc);
[18:52] <Taiko3615>
[18:52] <Taiko3615> //now combine and encode
[18:52] <Taiko3615> cmd = new ArrayList<String>();
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add(mFfmpegBin);
[18:52] <Taiko3615> cmd.add("-y");
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add("-i");
[18:52] <Taiko3615> cmd.add(fileTempMpg);
[18:52] <Taiko3615>
[18:52] <Taiko3615> if (audio != null && audio.path != null)
[18:52] <Taiko3615> {
[18:52] <Taiko3615> cmd.add("-i");
[18:52] <Taiko3615> cmd.add(new File(audio.path).getCanonicalPath());
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add("-map");
[18:52] <Taiko3615> cmd.add("0:0");
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add("-map");
[18:52] <Taiko3615> cmd.add("1:0");
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add(Argument.AUDIOCODEC);
[18:52] <Taiko3615> cmd.add("aac");
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add(Argument.BITRATE_AUDIO);
[18:52] <Taiko3615> cmd.add("128k");
[18:52] <Taiko3615>
[18:52] <Taiko3615> }
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add("-strict");
[18:52] <Taiko3615> cmd.add("-2");//experimental
[18:52] <Taiko3615>
[18:52] <Taiko3615> cmd.add(Argument.VIDEOCODEC);
[18:52] <Taiko3615>
[18:52] <Taiko3615> if (out.videoCodec != null)
[18:52] <Taiko3615> cmd.add(out.videoCodec);
[18:52] <Taiko3615> else
[18:52] <Taiko3615> cmd.add("mpeg4");
[18:52] <Taiko3615> if (out.videoBitrate != -1)
[18:52] <Taiko3615> {
[18:52] <Taiko3615> cmd.add(Argument.BITRATE_VIDEO);
[18:52] <Taiko3615> cmd.add(out.videoBitrate + "k");
[18:53] <impy> hmm
[18:53] <Taiko3615> sorry... here is the paste bin http://pastebin.com/qN5BZiGv
[18:53] <impy> That killed my irc client :s
[18:53] <impy> better :)
[18:53] <Taiko3615> lool sry...
[18:53] <jluttine> Taiko3615: ok, thanks.. :) anyway, i really would prefer getting this to work on the command line with ffmpeg
[18:54] <impy> Taiko3615: no worries.
[19:10] <llogan> Taiko3615: is the overlay adding a significant amount of time to the process?
[19:10] <llogan> you can stream copy the audio instead of re-encoding it with: -acodec copy
[19:10] <llogan> you can use a faster encoding preset (assuming you have libx264 support)
[19:21] <Taiko3615> I tweaked the preset and reached a pretty decent speed :-)
[19:21] <Logicgate> Does anyone know about closed captioning
[19:22] <Logicgate> Is there a way to convert SRT (SubRip Title) to SCC (Scenarist Closed Captioning)
[19:22] <Taiko3615> My last issue is about the size of the overlay, I'll try to fix it myself first ;-)
[19:22] <llogan> Taiko3615: you can add the scale filter to scale the image to be overlaid.
[19:25] <Taiko3615> ffmpeg -y -i compiled.mp4 -vf scale=1280x720 -i payday.mp3 -i /overlay_720p.png -filter_complex overlay -acodec aac -b:a 192k -y -cutoff 15000 -s 1280x720 -t 3.984 -vcodec mpeg4 -strict -2 compiledAndMusic.mp4
[19:26] <Taiko3615> The overlay has a size of 720p, but the initial video input is bigger
[19:26] <Taiko3615> the resulting video has the right size, but the overlay is not fullscreen
[19:29] <Taiko3615> e.g. compiled.mp4 (the first input) is bigger than 720p, overlay.png is 720p, and the resulting compiladAndMusic.mp4 is 720p. Sadly, on the resulting video the overlay is sized down. How can I specify to first resize compiled.mp4 to 720p, then add the overlay?
[19:32] <Taiko3615> Logicgate, to convert subtitles, I would use a third party software. Like http://www.3playmedia.com/services-features/tools/captions-format-converter/ (never tried it, but seems to do the job)
[19:33] <llogan> Taiko3615: you should put all filters in one filterchain: ffmpeg -i video.mp4 -i image.png -filter_complex "[1:v]scale=320:-1[fg];[0:v][fg]overlay=W-w-10:H-h-10[out]" -map "[out]" output.mp4
[19:33] <llogan> s/filterchain/filtergraph
[19:34] <Taiko3615> thanks llogan ! I'll try that :-)
[19:46] <Taiko3615> Works like charm ! Awesome :-D Thank !!!
[21:49] <JodaZ> how do i see the pts ffmpeg is generating ?
[22:48] <Logicgate> http://pastebin.com/Qzd945xm
[22:48] <Logicgate> I'm trying to extract the subtitle streams from an MOV
[22:48] <Logicgate> and that's the error I get
[23:00] <Logicgate> here are the streams for that video
[23:00] <Logicgate> http://pastebin.com/7Sr231yg
[23:33] <relaxed> -map:0:s:1 srt is wrong
[23:37] <relaxed> Logicgate: example from the man page: ffmpeg -i file.mov -an -vn -bsf:s mov2textsub -c:s copy -f rawvideo sub.txt
[23:44] <zh1> CLI video editing that doesn't include trial and error, playing video or audio, any?
[23:55] <llogan> zh1: i don't understand your question.
[00:00] --- Tue Feb 25 2014
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