October 2005 - ffmpeg-user - lists.ffmpeg.org

Re: priv_data_size ???
by ffmpeg＠gmail.com 02 Nov '05

02 Nov '05

> > I try to open a file, and i get an out of memory, when i see util.c in > libavformat, > i see : fmt->priv_data_size, where it assigned / defined ? > i do a printf and i see fmt->priv_data_size = 615 mB, but my file do 3.6 mB > > an idea ? > fmt->priv_data_size is just a wrapper size of file format context,and has no any relation to your file size fmt->priv_data_size is defined when you register a file format,for example static AVInputFormat avi_iformat = { "avi", "avi format", sizeof(AVIContext),//here is fmt->priv_data_size avi_probe, avi_read_header, avi_read_packet, avi_read_close, avi_read_seek, }; int avidec_init(void) { av_register_input_format(&avi_iformat); return 0; } Which version of FFmpeg? IMHO,it's caused by incompatible binary! Take care > brice. > > -- > Brice Rouanet > I.N.S.A. Centre de Ressources Informatiques > Complexe Scientifique 135 Avenue de Rangueil > 31077 Toulouse Cedex4 (France) tel 0561559374

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Re: [Ffmpeg-devel] Visual studio .net problem
by mbardiaux＠mediaxim.be 31 Oct '05

31 Oct '05

Langley, Adam wrote: > Thanks Michel, > > Can you provide a link for joining the forums? All the links on the ffmpeg > site appear to be dead... > > Thanks > > - Adam Langley Confirmed. Any indication of when people will be able to subscribe to the lists again? -- Michel Bardiaux R&D Director T +32 [0] 2 790 29 41 F +32 [0] 2 790 29 02 E mailto:mbardiaux at mediaxim.be Mediaxim NV/SA Vorstlaan 191 Boulevard du Souverain Brussel 1160 Bruxelles http://www.mediaxim.com/

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now jpeg support?
by gateway＠tietze.com 31 Oct '05

31 Oct '05

I built the latest cvs build today .. I want to grab a jpeg from a mpeg file here is the output su-2.05b# ffmpeg -i test.mpg -y -f image -img jpeg test%d.jpg -t 0.001 -s 352x240 ffmpeg version CVS, build 3276800, Copyright (c) 2000-2004 Fabrice Bellard configuration: --prefix=/usr/local --enable-a52 --enable-small --enable-shared-pp --enable-gpl --enable-shared --enable-memalign-hack built on Sep 29 2005 13:55:48, gcc: 2.95.4 20020320 [FreeBSD] Input #0, mpeg, from 'test.mpg': Duration: 00:00:19.0, start: 0.213367, bitrate: 1610 kb/s Stream #0.0[0x1e0], 29.97 fps: Video: mpeg1video, yuv420p, 352x240, 1150 kb/s Stream #0.1[0x1c0]: Audio: mp2, 44100 Hz, stereo, 224 kb/s Unknown image format: 'jpeg' You have new mail in /var/mail/gateway my OS is freebsd 4.11 stable.. did i miss something in compile options? Steve

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profiling in mac os
by alvarez＠ac.upc.edu 31 Oct '05

31 Oct '05

Hi I using ffmpeg in a powerpc machine with mac os x. I want to use gprof in order to profile the execution on the h264 decoder. But when I run the program I cannot find the gmon.out output file with the profiling results. ./ffmpeg ffmpeg version CVS, build 3277056, Copyright (c) 2000-2004 Fabrice Bellard configuration: --prefix=/Users/alvarez/usr/local/ --disable-ffserver --disable-ffplay --enable-gprof built on Oct 31 2005 15:55:47, gcc: 3.3 20030304 (Apple Computer, Inc. build 1495) It seems that the version of gcc that comes with mac does not activate the profiling when '-p' flag is passed, being necessary to pass '-pg'. But -pg has a conflict with the optimization option '-fomit-frame-pointer' I made a change in the Makefiles, adding the 'pg' option instead of 'p'. and eliminating the '-fomit-frame-pointer' flag. In that way the profiling information is generated correctly. I don't know how to make these changes into the autoconf utility in order to make it by default. I also I don't know if this is the best way to have the activate the profiling. Any suggestion is welcome. Thanks. Mauricio Alvarez

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How to make ffmpeg MPEG2TS output from two or more sources?
by web_devel＠mail.ru 31 Oct '05

31 Oct '05

Hello, I wish to make one mpeg2ts file from two sound cards in my PC. Is there way to do this with ffmpeg? Related to here: http://fabrice.bellard.free.fr/dvbt/ ``I used a patched version of FFmpeg to generate a custom DVB Transport Stream containing two DVB services.'' Anyone have this patches? Thank you.

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FFmpeg licensing issue
by suryya＠alumnux.com 29 Oct '05

29 Oct '05

Hi I have a query on last question:http://ffmpeg.sourceforge.net/legal.php Q: Since FFmpeg is licensed under the LGPL, is it perfectly all right to incorporate the whole FFmpeg core into my own commercial product? It is clear that we need to pay for a commercial product. What is the % of the amount to pay? And is MPEG-LA the only authority to pay? With Best Regards suryya

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*****SPAM(5.3)***** ¡¡¡ UNA BRILLANTE OPORTUNIDAD DE NEGOCIO !!!
by misena73＠yahoo.es 29 Oct '05

29 Oct '05

An embedded and charset-unspecified text was scrubbed... Name: not available URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-user/attachments/20051028/7c94c0…>

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grouping calls to av_read_frame in mpeg4 stream
by albi.jk＠gmail.com 28 Oct '05

28 Oct '05

in an mpeg4 stream i'd like to read "n" frames with calls to av_read_frame (0.cvs20050918), and then decode them with calls to avcodec_decode_video; it seems something like: for(i<n) av_read_frame(formatctx, pkt[i]); for(i<n) avcodec_decode_video(codecctx, pkt[i]); for video stream. is it possible? how to update pointers to next frame to read or other? with only those instructions (after some initialization) the errors are "header damaged" and -obviously- "concealing 198 DC, 198 AC, 198 MV errors". can you tell me something? thank you

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Decoding more than one stream at the same time
by dominik_rau＠gmx.net 28 Oct '05

28 Oct '05

Hi. I use libavcodec/libavformat in a 3D application to decode videos and apply them as textures on surfaces. I encapsulated the tutorial code by Martin Boehme (http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html) into a C++ class to get rid of all the global variables (AVCodec*, AVCodecContext* etc. are now member variables of this class) and update the texture in an additional thread. Basically this works fine. The problems begin, if I try to decode more than one stream at the same time: Instead of the video, there's only flickering - the same flickering on both surfaces. What goes wrong here? I don't share any data between the objects (no static members). Any ideas what's going wrong here and how to solve this? This happens on a Debian (sid/unstable) with libav[codec|format]cvs-dev packages in version 3:20051016-0.1. Thanks and regards, Dominik

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avi to flv?
by ducky＠flukiest.com 27 Oct '05

27 Oct '05

I was wondering if anyone ran into issues with converting AVI files to FLV. It seems to only work for some AVI files. Below is the output of the command. I am running the latest from CVS. ffmpeg version CVS, build 3277056, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-mp3lame --enable-gpl --enable-faad --enable-faac --enable-amr_nb --enable-amr_wb --enable-shared --prefix=/usr built on Oct 27 2005 10:12:12, gcc: 3.2.3 20030502 (Red Hat Linux 3.2.3-52) Input #0, avi, from '/data/websites/www.flukiest.com/data/videos/30/00/3/Video 1.avi': Duration: 00:00:43.7, start: 0.000000, bitrate: 612 kb/s Stream #0.0, 29.97 fps: Video: IV50 / 0x30355649, 180x120 Stream #0.1: Audio: pcm_s16le, 11025 Hz, mono, 176 kb/s Output #0, mjpeg, to '46086.mjpeg': Stream #0.0, nan fps: Video: mjpeg, yuvj420p, 180x120, q=2-31, 200 kb/s Stream mapping: Stream #0.0 -> #0.0 [mjpeg @ 0xcd5130]removing common factors from framerate Unsupported codec (id=0) for input stream #0.0

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