September 2007 - ffmpeg-user - lists.ffmpeg.org

Frame sizes
by estelasousavieira＠hotmail.com 31 Oct '07

31 Oct '07

I need to obtain the sizes of the I, P and B frames of the video of a DVD. Is this possible with ffmpeg? _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

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Export DV to Firewire problem
by renato.ornelas＠gmail.com 30 Oct '07

30 Oct '07

Dear friends. I have an ADS Pyro A/V Link and I want to encode some files to DV using ffmpeg so I would be able to throw them to /dev/dv1394-0 to watch the videos on my TV. I made the following tests: File 002.kinofx.dv was redered on Kino and I play it ok (audio and video) using cat 002.kinofx.dv > /dev/dv1394-0 But if I pass it througth ffmpeg using target ntsc-dv, the video is Ok, but i can't get any audio. With target dv only, the video gets encoded as PAL, so the screen is garbled, but there is audio (i guess because the wrong frame rate, the audio is faster). Now i have 3 files. The original kino file, one converted using ntsc-dv and other using dv. Here is what file's tells me about they: 002.kinofx.dv: DIF (DV) movie file (NTSC) pal.dv: DIF (DV) movie file (PAL) ntsc.dv: DIF (DVCPRO) movie file (NTSC) The first bytes of each file: htpc:~ # hexdump -Cn64 002.kinofx.dv 00000000 1f 07 00 3f 68 78 78 78 ff ff ff ff ff ff ff ff |...?hxxx........| 00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................| htpc:~ # hexdump -Cn64 ntsc.dv 00000000 1f 07 00 3f f9 79 79 79 ff ff ff ff ff ff ff ff |...?.yyy........| 00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................| htpc:~ # hexdump -Cn64 pal.dv 00000000 1f 07 00 bf f8 78 78 78 ff ff ff ff ff ff ff ff |.....xxx........| 00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................| The files were converted with the following command: ffmpeg -ac 2 -ar 48000 -s 720x480 -i USA.avi -target ntsc-dv -y ntsc.dv FFmpeg version SVN-r10560, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: libavutil version: 49.5.0 libavcodec version: 51.44.0 libavformat version: 51.13.4 built on Sep 25 2007 09:39:41, gcc: 4.1.2 20061115 (prerelease) (SUSE Linux) Input #0, dv, from '002.kinofx.dv': Duration: 00:00:56.9, start: 0.000000, bitrate: 28771 kb/s Stream #0.0: Video: dvvideo, yuv411p, 720x480, 28771 kb/s, 29.97 fps(r) Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s Output #0, dv, to 'ntsc.dv': Stream #0.0: Video: dvvideo, yuv411p, 720x480, q=2-31, 200 kb/s, 29.97fps(c) Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding frame= 585 fps= 61 q=0.0 Lsize= 68438kB time=19.5 bitrate=28771.2kbits/s video:68555kB audio:3654kB global headers:0kB muxing overhead -5.222162% Received signal 2: terminating. ffmpeg -ac 2 -ar 48000 -s 720x480 -i USA.avi -target pal-dv -y pal.dv FFmpeg version SVN-r10560, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: libavutil version: 49.5.0 libavcodec version: 51.44.0 libavformat version: 51.13.4 built on Sep 25 2007 09:39:41, gcc: 4.1.2 20061115 (prerelease) (SUSE Linux) Input #0, dv, from '002.kinofx.dv': Duration: 00:00:56.9, start: 0.000000, bitrate: 28771 kb/s Stream #0.0: Video: dvvideo, yuv411p, 720x480, 28771 kb/s, 29.97 fps(r) Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s PIX_FMT_YUV420P will be used as an intermediate format for rescaling Output #0, dv, to 'pal.dv': Stream #0.0: Video: dvvideo, yuv420p, 720x576, q=2-31, 200 kb/s, 25.00fps(c) Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding [dvvideo @ 0x84ab930]Can't process DV frame #364. Insufficient audio data or severe sync problem. frame= 366 fps= 30 q=0.0 Lsize= 51188kB time=14.6 bitrate=28758.1kbits/s video:51469kB audio:2734kB global headers:0kB muxing overhead -5.562869% If I import those ntsc.dv to kino, it would play with sound. Maybe the video output of ffmpeg isn't standarts compliant and my Pyro can't decode it properly. Thanks in advance for you help and sorry for the bad english. Renato Ornelas

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VFW Capture support
by ramiro＠lisha.ufsc.br 23 Oct '07

23 Oct '07

Hello, First attempt for VFW capture support in Windows. For testing purposes only! Enable it with: ./configure --enable-memalign-hack --enable-vfw-cap It prints lots of (somewhat useless) debug messages. Image is upside down =). I just have to find the right PIX_FMT and width/height... I'm way too tired to look at that now. Note: Run this FFmpeg from Windows' command prompts (cmd or command)! *Not MSys!*. This patch includes the patch I sent to ffmpeg-devel for interactive support for Windows. You must kill it with 'q' or Ctrl+C, or else the capture device won't be released, and you'll have to reboot Windows to get it back. MSys doesn't capture 'q' nor Ctrl+C, so it's doomed to make you loose control of the device. Ramiro Polla

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ffmpeg handling m2v streams.
by eliared＠yahoo.com 17 Oct '07

17 Oct '07

With an mpeg2 elementary stream as input ffmpeg reports that codec frame rate and container framerate differ. Ffmpeg seems to believe m2v should have a framerate of 25fps. >From what I gather muxing works fine, but if you encode 25fps is taken down the chain unless you set -r. Not a big problem, but i wonder about the why? C:\Documents and Settings\Administrator\Desktop\flv>ffmpeg -i rawhc.m2v FFmpeg version SVN-r9767, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --enable-gpl --enable-pp --enable-swscaler --enable-pthreads -- enable-liba52 --enable-avisynth --enable-libamr-nb --enable-libamr-wb --enable-l ibfaac --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libnut --en able-libogg --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libx vid --cpu=i686 --enable-memalign-hack --extra-ldflags=-static libavutil version: 49.4.1 libavcodec version: 51.40.4 libavformat version: 51.12.1 built on Jul 20 2007 18:03:34, gcc: 4.2.0 Seems stream 0 codec frame rate differs from container frame rate: 50.00 (50/1) -> 25.00 (25/1) Input #0, mpegvideo, from 'rawhc.m2v': Duration: 00:00:04.0, start: 0.000000, bitrate: 20084 kb/s Stream #0.0: Video: mpeg2video, yuv420p, 1280x720, 20000 kb/s, 25.00 fps(r) Must supply at least one output file --------------------------------- Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase.

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trouble compiling on OS X
by r.firth＠ridley.unimelb.edu.au 16 Oct '07

16 Oct '07

I am having trouble getting ffmpeg to compile on my Intel Mac running OS 10.4. do I need to compile or download some other components? Command: $ ./configure --prefix=/Applications/Locomotive2/Bundles/rmagickRailsJan2007_x86.locobundle/framework/ --disable-vhook --disable-mmx && make Error: gcc -L"/Users/bob/dev/ffmpeg"/libavformat -L"/Users/bob/dev/ffmpeg"/libavcodec -L"/Users/bob/dev/ffmpeg"/libavutil -Wl,-dynamic,-search_paths_first -g -o ffmpeg_g ffmpeg.o cmdutils.o-lavformat -lavcodec -lavutil -lz /usr/bin/ld: Undefined symbols: _mm_flags _dsputil_init_mmx collect2: ld returned 1 exit status More details at: http://pastebin.ca/684978 any advice will be greatly appreciated, thanks, Bob

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Problem building ffmpeg in MingW
by 10walls＠gmail.com 14 Oct '07

14 Oct '07

Hi, not strictly a question but here goes. I had problems building ffmpeg from the svn checkouts without some modifications. First of all the configure script fails the libx264 detection. My x264 install is built with pthreads. The configure script fails to test libx264 with gcc -o /tmp/ffmpeg-conf-13885-2672-28731 /tmp/ffmpeg-conf-21387-2672-28548.o -lm -lz -lpthread -lx264 .... undefined reference to `_imp__pthread_join' .... undefined reference to `_imp__pthread_create' .... undefined reference to `_imp__pthread_num_processors_np' .... undefined reference to `_imp__pthread_mutex_lock' .... undefined reference to `_imp__pthread_mutex_unlock' .... etc, error messages about undefined reference to pthread functions. Modifying configure at line 1576 and adding -lpthread AFTER -lx264 works. The new test would pass "-lm -lz -lpthread -lx264 -lpthread" to gcc. What is going on? Also libavformat/vocenc.c would fail to compile. `ENOTSUP' undeclared (first use in this function). Adding #define ENOTSUP 48 would fix it. ENOTSUP is also defined in pthread.h. Will anybody be fixing it?

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extracting MPEG-PES from MPEG-PS
by carzrgr8＠optonline.net 11 Oct '07

11 Oct '07

>of course the decoder can't decode the PES packet: that custom demuxer >is returning PES packets for some custom use, isn't it? (e.g. DVB >decoders usually want PES audio and PES video packets in their >fifos) I'm not certain what you mean. I pass only video packets to the video decoder. My custom demux has an RTP input, and is receiving mpeg1 (and 2) TS, so packets stream into the application. The demux separates the audio and video PES correctly (although I am only using video currently, and discarding everything else). Following that, the PES header is removed from the packet. I save up an entire PES packet before passing it to the avcodec_decode_video() . Interestingly, earlier version of code did not remove the PES header, and the decoder was at least giving partial images. But, my demux did not check for errored packets - maybe a problem. regards, gene

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JackLab 1.0 released!
by allcoms＠googlemail.com 08 Oct '07

08 Oct '07

JackLab Audio Distribution 1.0 Announcement September 15th, 2007 saw the release of the first stable version of the JackLab Audio Distribution (aka JAD), a totally free GNU/Linux based operating system which ushers in a new, open and free age in computing and media production. JackLab can be used as a complete replacement for MS Windows, as it includes WINE which allows you to run many Windows programs full-speed (some actually run FASTER under JackLab/WINE than under genuine Windows!) or you can have JackLab and Windows simultaneously installed on one PC if you wish. Why is JackLab better than other versions of Linux? One of the longest standing criticisms of other Linux distributions has been their poor multimedia support 'out-of-the-box'- unless you knew what extra programs were required AND had a fast internet connection to download them then most versions of Linux offered only very basic, crippled multimedia support. This, however, is exactly the area in which JAD excels as it offers the most comprehensive and up-to-date selection of open source audio and multimedia software thus far- literally hundreds of programs are included on the JAD DVD. JAD is also the first version of Linux to offer full support for ASIO via wineasio, which allows musicians to use their VST plug-ins under both Linux and Windows music programs. Immediately after installing JAD, you can: * Playback, edit and convert MP3s, WAVS, OGGS and any other audio format * Multi-track recording of music with lower latency than either MacOSX or Windows * MIDI sequencing, real-time audio synthesis and FX, samplers etc. * Capture video from DV, HDV, DVB, TV and analogue sources such as VHS * Edit and convert video * Rip, playback, edit and author DVDs * Stream audio and video over the internet * Scan, print, convert and manipulate bitmap and vector graphics * Easily update and download 1000's more free programs from the internet * Word processing, Desktop Publishing, internet and more are also catered for Alongside offering optimal performance for music producers, another key goal of the JackLab project was to make the system as easy to use as possible and this is why we chose openSUSE 10.2 as its base. Thanks to openSUSE's graphical control centre- YasT, the most powerful of its kind for Linux- all system configuration tasks are easily achieved in a few clicks. To further ease the process of learning to use JackLab, it is recommended you read the JAD Introduction which explains the main differences between using JAD and MS Windows, lists the most important applications and gives handy tips on their usage: http://wiki.jacklab.net/index.php/JAD_introduction You can find out for yourself today why it is that Hollywood, Google, Yahoo and the world of supercomputing have standardised on the "Universal OS of the internet" that is GNU/Linux. Say goodbye to the viruses, spyware/malware, corporate control and forced upgrades that are the bane of Windows users and regain full control of your computer by downloading JackLab today. We hope you enjoy using JackLab and look forward to hearing your feedback! Dan MacDonald and Team JackLab http://jacklab.org/

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feeding a Canon camera
by leo＠dicea.unifi.it 06 Oct '07

06 Oct '07

I bought a Canon powershot A570IS camera. the small thing has a large screen and built in speaker. I was tempted to use it as a video player for podcasts. howewer if i put in the sd-card either an mpg or an avi file it does not even recognize the presence. Does someone know what is the format/command and the name to put a camera-playable file ?

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libfaac installed but unknown
by hymie＠lactose.homelinux.net 05 Oct '07

05 Oct '07

Greetings. I'm sure there is something I'm missing, but I can't find it. Why do I get the error message "Unknown decoder libfaac" ? herman-p9:~hymie/youtube% uname -a Linux herman 2.6.19.1 #1 PREEMPT Mon Dec 25 20:53:35 EST 2006 i686 unknown herman-p9:~hymie/youtube% ffmpeg -vcodec mpeg4 -b 300 -qmin 3 -qmax 5 -bufsize 4096 -g 300 -acodec libfaac -ab 96 -i subway.avi -s 320x240 -aspect 4:3 subway.ipod.mpg FFmpeg version SVN-r10531, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --enable-shared --disable-static --enable-libfaac libavutil version: 49.5.0 libavcodec version: 51.44.0 libavformat version: 51.13.3 built on Sep 18 2007 15:18:27, gcc: 3.4.6 Unknown decoder 'libfaac' herman-p9:~hymie/youtube% ldd /usr/local/bin/ffmpeg [...] libfaac.so.0 => /usr/local/lib/libfaac.so.0 (0xb7920000) [...] herman-p9:~hymie/youtube% strace ffmpeg -vcodec mpeg4 -b 300 -qmin 3 -qmax 5 -bufsize 4096 -g 300 -acodec libfaac -ab 96 -i subway.flv -s 320x240 -aspect 4:3 subway.ipod.mpg [...] open("/usr/local/lib/libfaac.so.0", O_RDONLY) = 3 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\240\26"..., 512) = 512 fstat64(3, {st_mode=S_IFREG|0755, st_size=72504, ...}) = 0 mmap2(NULL, 63980, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb78 b9000 mmap2(0xb78c6000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRI TE, 3, 0xd) = 0xb78c6000 close(3) = 0 [...] --hymie! http://lactose.homelinux.net/~hymie hymie at lactose.homelinux.net ------------------------ Without caffeine for 322 days ------------------------

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