November 2005 - ffmpeg-user - lists.ffmpeg.org

questions about performance tuning and enable-shared
by reid.vail＠mci.com 13 Sep '06

13 Sep '06

Shown below is the ffmpeg version I'm running. I have two questions about different issues: 1) performance tuning and 2) using --enable-shared. --------------------------------------------------------------------------- reid at linux:~/FFMpeg-20050519/FFMpeg-20050519> ffmpeg -version ffmpeg version 0.4.9-pre1, build 4755, Copyright (c) 2000-2004 Fabrice Bellard configuration: --prefix=/usr --enable-mp3lame --enable-gpl built on May 18 2005 22:26:04, gcc: 3.3.4 (pre 3.3.5 20040809) ffmpeg 0.4.9-pre1 libavcodec 4755 libavformat 4624 ---------------------------------------------------------------------------- 1) Regarding performance tuning, I wonder if I well get better performance from ffmpeg if I ./configure it with the cpu info I'm using? I have an AMD x86_64. Should I use the --tune option, and would the syntax be --tune=x86_64, or some other syntax. What might that be, please? 2) When I have run ./configure with --enable-shared the Make bombs. Should I be adding some other options or switches (meaning..is it something I'm doing wrong?) and can you tell me what it is I need to do or is ffmpeg just not ready for --enable-shared with x86_64? Thanks Reid ______________________________________________________________________ This e-mail has been scanned by MCI Managed Email Content Service, using Skeptic? technology powered by MessageLabs. For more information on MCI's Managed Email Content Service, visit http://www.mci.com. ______________________________________________________________________

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3gp vs 3g2 to flv
by ducky＠flukiest.com 17 May '06

17 May '06

All: I am able to convert 3gp files to flv format just fine. However I get a error when I try to convert a 3g2 to flv. Is there something I need to enable to accomplish this? thanks. ffmpeg -i Video_082305_001.3g2 -hq -acodec mp3 -ar 44100 -ab 64 -f flv -s 320x240 -aspect 4:3 -y Video_082305_001.flv ffmpeg version CVS, build 3211266, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-mp3lame --enable-gpl --enable-faad --enable-faac --enable-amr_nb built on Aug 21 2005 23:55:01, gcc: 3.3.3 20040412 (Red Hat Linux 3.3.3-7) Input #0, mov,mp4,m4a,3gp,3g2, from 'Video_082305_001.3g2': Duration: 00:00:29.3, start: 0.000000, bitrate: 113 kb/s Stream #0.0: Audio: aac, 64000 Hz, 9 channels Stream #0.1: Video: mpeg4, yuv420p, 320x240, 15.00 fps Resampling with input channels greater than 2 unsupported.Can't resample. Aborting. Abort at ffmpeg.c:1723

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Re: [MPlayer-users] unknown codec 0x66666974
by mortarn_lists＠yahoo.com.au 22 Feb '06

22 Feb '06

* Guillaume POIRIER <poirierg at gmail.com> [2005-10-31 14:08 +0100]: > On 10/31/05, Joshua Crawford <mortarn_lists at yahoo.com.au> wrote: >> * Guillaume POIRIER <poirierg at gmail.com> [2005-10-30 10:02 +0100]: >>> On 10/30/05, Joshua Crawford <mortarn_lists at yahoo.com.au> wrote: >>>> I just recently subscribed to the podcast from Make magazine >>>> <http://makezine.com/blog/archive/make_podcast/index.xml>, and it contains a >>>> number of .m4b files. I was lucky, in that the first one I tried playing >>>> (MAKE_2005-07-18.m4b) had JPEG images in it, and it worked fine. The rest >>>> all have TIFF images, and it seems mplayer doesn't support TIFF (it's not >>>> linked against libtiff, and there's no configure option I can see). >>>> >>>> So, is there some outside codec I need installed? I have the Quicktime >>>> codecs, from the all codecs tarball from April. >>> >>> I don't think it's gonna make any difference, but please try CVS >>> version of MPlayer. >> >> I've just installed the CVS version, and you're right - there's no >> difference. > > The best thing is to upload a "Tiff" video sample online somewhere and > give a link to it on ffmpeg mailing list so that ppl can hopefully > work on it and make it watchable. Ok, so this mail is now also going to ffmpeg-user, and hopefully followups will only be there. I don't need to upload the files, I just have to say where I got them :) <http://downloads.oreilly.com/make/MAKE_2005-07-18.m4b> has JPEG images, and works in mplayer. <http://downloads.oreilly.com/make/MAKE_2005-08-01.m4b> (and all the others from the RSS feed I linked above) has TIFF images, and the pictures aren't displayed (audio works). -- Joshua 'bruce' Crawford ... http://www.geocities.com/mortarn Quando omni flunkus moritati

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Error: Could not find video grab device - need help
by kamarudin＠gmail.com 18 Jan '06

18 Jan '06

Hi all, 1st of all, im Linux noob. Im running Fedora Core 3. I try to put my camera onthe web by using ffserver and ffmpeg. I can see the aoutput using xawtv, so my camera was OK. As root, i run ffserver....and ffserver started. But when i run.... ... [root at xxx]# ffmpeg -vd '/dev/video0' -an http://localhost:8090/feed1.ffm ffmpeg version 0.4.9-pre1, build 4730, Copyright (c) 2000-2004 Fabrice Bellard configuration: --build=i686-redhat-linux-gnu --host=i686-redhat-linux-gnu --target=i386-redhat-linux-gnu --program-prefix= --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib --libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/usr/com --mandir=/usr/share/man --infodir=/usr/share/info --extra-cflags=-O2 -g -pipe -m32 -march=i386 -mtune=pentium4 --enable-mp3lame --enable-vorbis --enable-faad --enable-faac --enable-xvid --enable-pp --enable-shared-pp --enable-shared --enable-gpl --disable-strip built on Nov 16 2004 11:18:55, gcc: 3.4.2 20041017 (Red Hat 3.4.2-6.fc3) [video4linux @ 0xb85428]Fatal: grab device does not support suitable format Could not find video grab device What going wrong?? Help me please :(. Thanx in advance. -- regards, kamarudin samsudin

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Encoding live TV
by danycrit＠yahoo.it 09 Jan '06

09 Jan '06

Hi All, It is several weeks that I try to encode a live TV feed (from a V4L2 capture device) to an MPEG2 file using the avformat library without success. I always get 'buffer underrun' errors and core dumps from glibc due to a double free or corruption (caused by avformat/avcodec since the code without the compression calls works perfectly). The resulting file, when playable, is always out of sync, stuttering and all weird things that could happen to a video file. Since it is a live source I can't feed more data than what I receive. I know that the video and audio timings may not be exactly to the microsecond, but why avformat is so concerned about this buffer ? Is there a way to disable this damned buffer ? I searched for some tutorials, example or even for a spell to cast in order to get this thing working, but without success. I found thousands of site with the avformat/avcodec source code nicely formatted but without any useful information. It seems that avformat users are more concerned about playing a file rather than creating one (should I assume that avformat is useful for playing only ?). I just updated the ffmpeg library: bad move, now the frame rate fields are missing, how do I set the frame rate ? Geez, these guys must hate documentation !! The library version should be: 0.4.9-0.lvn.0.18.20050801.4 on a FC4 X86_64. Please can someone help me ? Thanks

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Network video streaming problem using ffserver and ffmpeg
by yzhang＠belcan.com 12 Dec '05

12 Dec '05

Hi all, I have some problems when trying to play live video streams through network by using ffserver and ffmpeg. I got a ffmpeg cvs snapshot on Nov. 10, 2005 and I am running it on Redhat 9.0 target system. After compiling and changing the ffserver.conf for ASF format, I ran the program as: ./ffserver -f doc/ffserver.conf & ./ffmpeg -vd /dev/video0 -tvstd PAL http://localhost:8090/test.asf (My target system is hooking a PAL camera) Then I used different media player programs such as WMV 10.0, VLC 0.0.2 and Real Player in my Winows XP laptop trying to access it through http protocol. But none of them works. Among them, VLC works better compared with other two. WMV and Real Player didn't work at all. VLC sometimes will give you static captured picture instead of real-time video. Since I just used a crossover ethernet cable to connect my laptop with the host. I don't see traffice is an issue. The following is runtime info. I don't know if "error, non monotone timestamps ..." caused this problem. I sincerely appreciate if somebody can share some lights on it. I am in a very tight development schedule. Thanks again. Yonghang ffmpeg version CVS, build 3277056, Copyright (c) 2000-2004 Fabrice Bellard configuration: built on Nov 11 2005 09:44:29, gcc: 3.2.2 20030222 (Red Hat Linux 3.2.2-5) 127.0.0.1 - - [Fri Nov 11 16:31:03 2005] "GET /feed1.ffm HTTP/1.0" 200 12341 127.0.0.1 - - [Fri Nov 11 16:31:03 2005] "GET /feed1.ffm HTTP/1.0" 200 12341 Input #0, video4linux, from '': Duration: N/A, bitrate: N/A Stream #0.0, 15.00 fps: Video: rawvideo, yuv420p, 352x240, 15206 kb/s Input #1, audio_device, from '': Duration: N/A, bitrate: N/A Stream #1.0: Audio: pcm_s16le, 44100 Hz, mono, 705 kb/s Output #0, ffm, to 'http://localhost:8090/feed1.ffm': Stream #0.0: Audio: adpcm_ima_wav, 44100 Hz, mono, 64 kb/s Stream #0.1, nan fps: Video: msmpeg4, yuv420p, 352x240, q=3-31, 256 kb/s Stream #0.2: Audio: mp2, 22050 Hz, mono, 64 kb/s Stream mapping: Stream #1.0 -> #0.0 Stream #0.0 -> #0.1 Stream #1.0 -> #0.2 [msmpeg4 @ 0x8359110]removing common factors from framerate Press [q] to stop encoding [msmpeg4 @ 0x8359110]rc buffer underflow [msmpeg4 @ 0x8359110]rc buffer underflow 192.250.10.16 - - [Fri Nov 11 16:31:11 2005] "GET /test.asf HTTP/1.0" 200 121 192.250.10.16 - - [Fri Nov 11 16:31:11 2005] "GET /test.asf HTTP/1.0" 200 13605 error, non monotone timestamps 1131748273169424 >= 1131748273123143 error, non monotone timestamps 1131748274674162 >= 1131748274627881 192.250.10.16 - - [Fri Nov 11 16:31:15 2005] "GET /test.asf HTTP/1.0" 200 106766192.250.10.16 - - [Fri Nov 11 16:31:58 2005] "GET /test.asf HTTP/1.0" 200 121 192.250.10.16 - - [Fri Nov 11 16:31:58 2005] "GET /test.asf HTTP/1.0" 200 757 error, non monotone timestamps 1131748319128748 >= 1131748319082467 192.250.10.16 - - [Fri Nov 11 16:31:59 2005] "GET /test.asf HTTP/1.0" 200 26465 192.250.10.16 - - [Fri Nov 11 16:32:55 2005] "GET /test.asf HTTP/1.0" 200 121 192.250.10.16 - - [Fri Nov 11 16:32:55 2005] "GET /test.asf HTTP/1.0" 200 757 error, non monotone timestamps 1131748377030496 >= 1131748376984215 error, non monotone timestamps 1131748377140296 >= 1131748377094015 192.250.10.16 - - [Fri Nov 11 16:32:58 2005] "GET /test.asf HTTP/1.0" 200 97118 192.250.10.16 - - [Fri Nov 11 16:33:15 2005] "GET /test.asf HTTP/1.0" 200 121 192.250.10.16 - - [Fri Nov 11 16:33:15 2005] "GET /test.asf HTTP/1.0" 200 13605 error, non monotone timestamps 1131748397144436 >= 1131748397098155 192.250.10.16 - - [Fri Nov 11 16:33:17 2005] "GET /test.asf HTTP/1.0" 200 26466 192.250.10.16 - - [Fri Nov 11 16:35:30 2005] "GET /test.asf HTTP/1.0" 200 121 192.250.10.16 - - [Fri Nov 11 16:35:31 2005] "GET /test.asf HTTP/1.0" 200 757 error, non monotone timestamps 1131748531193294 >= 1131748531147013 192.250.10.16 - - [Fri Nov 11 16:35:31 2005] "GET /test.asf HTTP/1.0" 200 26466 frame= 4539 q=0.0 Lsize= 18560kB time=302.5 bitrate= 502.6kbits/s The information transmitted is intended only for the person(s) or entity to which it is addressed and may contain sensitive and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient(s) is prohibited. If you received this in error, please contact the sender and destroy any copies of this document.

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ffserver/ffmpeg trouble?
by danci＠agenda.si 11 Dec '05

11 Dec '05

Hi, I'm trying to use ffmpeg with ffserver and the 'latest' CSV (24.6.05 was the date I built and tested it) doesn't seem to work. There are (or seem to be) no problems grabbing the video using just ffmpeg and saving it into a file - using the same options (codecs, bitrates, ...) as I used in 'ffserver.conf'. That's the command line (I limited the time to 30s): ffmpeg -vd /dev/video0 -t 30s -f asf -vcodec msmpeg4v2 -b 768 -s 4cif -r 15 -acodec mp3 -ab 128 -ac 1 out.asf If I transfer the file to a Windows machine, the WMP and BSPLAYER have no problem playing it. But if I try to serve this file via 'ffserver' or 'ffmpeg' to feed a live stream, I get a lot of errors or warnings: >From ffmpeg (when it starts): [msmpeg4v2 @ 0x404036f0]removing common factors from framerate [msmpeg4v2 @ 0x404036f0]rc buffer underflow [msmpeg4v2 @ 0x404036f0]rc buffer underflow [msmpeg4v2 @ 0x404036f0]rc buffer underflow And from ffserver (when the client connects): error, non monotone timestamps 1119949284664561 >= 1119949284612317 error, non monotone timestamps 1119949284925767 >= 1119949284873523 error, non monotone timestamps 1119949286571453 >= 1119949286545331 WMP connects and starts buffering. But right as it should start playing, it stops and goes into 'waiting' state (that's what it says on the status bar). Ffserver uses the same options for format, codecs and bitrates as were used in 'ffmpeg' example. If I try to play a stream from the file (created by previos ffmpeg example), it starts playing but it re-buffers every couple of seconds - even though the network should be fast enough (tested on LAN) and the encoding machine is not too busy (about 40% CPU usage). Did any of you have better luck using the ffserver with ffmpeg (with recent versions, that is)? Thanks, D. PS: Right now I'm using an earlier version which kind of works - the WMP plays (both the file and live) but it re-bufferes every couple of seconds...

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what about speex?
by fl0ppy1＠gmail.com 07 Dec '05

07 Dec '05

I tried this audio codec anmd it's very good, based in ogg vorbis.

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problem compiling ffplay.c under windows
by franco.amato＠gmail.com 01 Dec '05

01 Dec '05

Hi peolple, I downloaded the latest ffmpeg, I compiled it under windows using MinGW and I now I have avformat(dll + lib) and avcodec(dll + lib)... I would like use them in my application written with Visual C++ 2003 7.1 tool. I tried to compile ffplay.c with that tool, but I've got a lot of errors... Someone can help me??? You can write at franco.amato at gmail.com Best regards.. Frank p.s. sorry for my bad english

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Confirm subscription to gentoo-cluster@gentoo.org
by gentoo-cluster+help＠gentoo.org 29 Nov '05

29 Nov '05

Hi, this is the mlmmj program managing the mailinglist gentoo-cluster at gentoo.org To confirm you want the address ffmpeg-user at mplayerhq.hu added to this list, please send a reply to gentoo-cluster+confsub-11d01e6e5ff09aa8-ffmpeg-user=mplayerhq.hu at gentoo.org This confirmation serves two purposes. It tests that mail can be sent to your address. Secondly it makes sure someone else did not try and subscribe your emailaddress without you wanting it. Your mailer probably automatically replies to the confirmation address, when you hit the reply button. The subject and the body of the mail can be anything.

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