March 2006 - 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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ffmpeg.exe from PSP9 works fine, but not mine
by Lars.Blumberg＠aquasoft.de 11 Apr '06

11 Apr '06

> Can you give in private a source video and I will encode this with my > method, and you will try it on your PSP ;-) I believe you, that your method works, but I only want to work with ffmpeg ;) I downloaded PSP9 and used the ffmpeg.exe located in the install dir to encode a PSP video and it worked. I used the following command line: ffmpeg-psp9.exe -y -i d:\diashow.avi -title "blabla" -bitexact -s 320x240 -r 29.97 -b 480 -ac 2 -ar 24000 -ab 64 -f psp -muxvb 768 M4V12345.mp4 (ffmpeg version CVS, build 4759, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-mp3lame --enable-faac --enable-faad --enable-amr_nb - -enable-amr_wb --disable-ffplay --enable-small --enable-memalign-hack --enable-g pl --enable-xvid --enable-dts --enable-a52 --disable-vhook --enable-pthread --en able-x264) The created video works fine on PSP. Now I used MY own ffmpeg.exe and used the SAME command line for my ffmpeg.exe. I got the result: "Unable for find a suitable output format for '320x240'" Why doesn't my ffmpeg.exe understand the screen size? Thanks for any advise! Lars

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Thumbnails while transcoding?
by sean＠i2on.com 11 Apr '06

11 Apr '06

While transcoding from an input file to flv, is there a way to have it spit out a jpg every 'x' seconds or frames? TIA, Sean

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FFMPEG Does not Playback with rtsp Stream.
by amit.borlikar＠uni-konstanz.de 10 Apr '06

10 Apr '06

Hello Experts, I am working on a Real Time Video transmission project,so basically I have to stream a video over a network.When i start ffserver,The stream of mine is being encoded but when i Try to play it back on my computer with Real Player 10 it displays the msg Error mesage::-- " Unable to establish a connection with the server. (http://localhost:8090/test.rm)" I actually want it to play back with rtsp as that would be more efficient in real time video transmission and the playback command is rtsp://localhost:5454/test1.rtsp.rm it still give me the same error message as above. My ffserver confugarations are as follows... <Stream test.rm> Feed feed1.ffm Format rm AudioBitRate 32 VideoCodec rv10 VideoSize 640*480 videoBitRate 200 VideoFrameRate 25 VideoGopSize 25 </Stream> My ffserver starts properly and also encodes the stream but i get no display in my real player when I click on open location. I also tried with ffplay and the command i give is ffplay -f rm http://localhost:8090/test.rm and it works. Can someone sujjest something about the rtsp stream.I need to get rtsp stream working.I have a little time on my hands. Could you tell me what I am doing wrong. Regards, Thank you in advance, Amit

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Re: ffserver problems (Imam Wibowo)
by imamwib＠students.stttelkom.ac.id 09 Apr '06

09 Apr '06

I configure the ffserver.conf like that but it's still can't be played in WMP. WMP said "Windows Media Player cannot perform the requested action at this time". I try to stream with mpg but it's same cases with asf. What's the problem? I try to stream in browser with swf, the video can be viewed nicely but the audio can't be hear. If I set "NoAudio" in ffserver.conf, the video can be played nicely without audio. If I set AudioCodec, AudioSampleRate, AudioBitRate, etc.. actually the video can't be played, need refresh in browser than the video stopped...refresh and stopped...refresh and stopped. =============my ffserver.conf================= # Flash <Stream test.swf> Feed feed1.ffm Format swf #VideoFrameRate 15 VideoBitRate 200 #VideoGopSize 30 VideoCodec flv #VideoIntraOnly AudioChannels 1 AudioCodec mp3 AudioBitRate 64 AudioSampleRate 44100 VideoSize cif #NoAudio </Stream> # ASF compatible <Stream test.asf> Feed feed1.ffm Format asf VideoCodec msmpeg4v2 VideoFrameRate 15 VideoSize cif VideoBitRate 256 VideoGopSize 30 VideoHighQuality AudioBitRate 64 AudioChannels 1 AudioCodec mp3 PreRoll 15 StartSendOnKey #NoAudio </Stream> # mpeg <Stream test.mpg> Feed feed1.ffm Format mpeg VideoCodec mpeg4 VideoFrameRate 25 VideoSize 352x288 VideoBitRate 200 #VideoGopSize 30 AudioCodec mp3 AudioBitRate 64 AudioChannels 1 AudioSampleRate 44100 StartSendOnKey </Stream> ================================== Whereis the problem?? > ow is your ffserve.conf, what sort of strea hare we talking abouth... asf > avi, mpg1 , witch codec hare you trying to use ??? > I do not have any problem with my stream with asf > # ASF compatible sqcif, qcif, cif, 4cif > <Stream Live.asf> > Feed feed1.ffm > Format asf > VideoFrameRate 10 > VideoSize qcif > VideoBitRate 50 > VideoGopSize 30 > AudioBitRate 24 > AudioChannels 1 > AudioCodec mp3 > PreRoll 15 > StartSendOnKey > </Stream> >> Le Dim 19 F?v 2006 09:44, Pete Foster a ?crit?: >> I'm really having problems with ffserver streaming to WMP10. >> >> ffmpeg grabs video to a file fine, no problems at all. When trying to >> stream, media player just doesn't want to know. >> >> It starts off buffering, then says it's playing, but with no media being >> shown/heard. Then it'll start buffering again but the buffer level drops >> rather than rises. Something like: >> Buffering 92% >> Buffering 74% >> Buffering 36% >> ... >> >> Interestingly, if I press "q" to stop the ffmpeg process, I get a single >> frame in WMP10. I've tried with Real also, with similar results. >> >> This is with the latest CVS, all worked fine in 4.8. >> >> Any ideas? >> >> -- >> Pete Foster >> >> _______________________________________________ >> ffmpeg-user mailing list >> ffmpeg-user at mplayerhq.hu >> http://mplayerhq.hu/mailman/listinfo/ffmpeg-user

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ffmpeg -h
by ed_b_71＠hotmail.com 03 Apr '06

03 Apr '06

Ok so looked up some of the archives and realized the support is only for cvs comipled ffmpeg So I got hold of the latest src and yes it buid all the way thru. I just did a simple command ffmpeg -h It prints out a bunch of options towards the end though there are a bunch with E.V/D.V in the explanations what do .DV and E.V mean? -edge .DV.. -hpel_chroma .DV.. -dc_clip .DV.. -ms .DV.. -lelim <int> E.V.. single coefficient elimination threshold for luminance (negative values also consider dc coefficient) -celim <int> E.V.. single coefficient elimination threshold for chrominance (negative values also consider dc coefficient) -strict <int> E.V.. -very E.V.. -strict E.V.. -normal E.V.. -inofficial E.V.. -experimental E.V.. -b_quant_offset <float> E.V.. -er <int> .DV.. -careful .DV.. -compliant .DV.. -aggressive .DV.. -very_aggressive .DV.. -mpeg_quant <int> E.V.. -rc_qsquish <float> E.V.. -rc_qmod_amp <float> E.V.. -rc_qmod_freq <int> E.V.. -rc_eq <string> E.V.. -rc_max_rate <int> E.V.. -rc_min_rate <int> E.V.. -rc_buffer_size <int> E.V.. -rc_buf_aggressivity <float> E.V.. -i_quant_factor <float> E.V.. -i_quant_offset <float> E.V.. -rc_initial_cplx <float> E.V.. -dct <int> E.V.. -auto E.V.. -fastint E.V.. -int E.V.. -mmx E.V.. -mlib E.V.. -altivec E.V.. -faan E.V.. -lumi_mask <float> E.V.. lumimasking -tcplx_mask <float> E.V.. temporal complexity masking -scplx_mask <float> E.V.. spatial complexity masking -p_mask <float> E.V.. inter masking -dark_mask <float> E.V.. darkness masking -idct <int> EDV.. -auto EDV.. -int EDV.. -simple EDV.. -simplemmx EDV.. -libmpeg2mmx EDV.. -ps2 EDV.. -mlib EDV.. -arm EDV.. -altivec EDV.. -sh4 EDV.. -simplearm EDV.. -h264 EDV.. -vp3 EDV.. -ipp EDV.. -xvidmmx EDV.. -ec <flags> .DV.. -guess_mvs .DV.. -deblock .DV.. -pred <int> E.V.. prediction method -left E.V.. -plane E.V.. -median E.V.. -aspect <rational> E.V.. -debug <flags> EDVAS print specific debug info -pict .DV.. -rc E.V.. -bitstream .DV.. -mb_type .DV.. -qp .DV.. -mv .DV..

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Configure/Make do not create full ffmpeg library files
by Lars.Blumberg＠aquasoft.de 02 Apr '06

02 Apr '06

Some weeks ago when using the configure options configure --enable-memalign-hack --enable-mingw32 --prefix=/home make created ffmpeg.exe, avformat.dll, avcodec.dll and avutil.dll in the avformat, avcodec and avutil directory. Now there is only ffmpeg.exe, the dll files are missing. When using the option "--enable-shared" additionally (configure --enable-memalign-hack --enable-mingw32 --prefix=/home --enable-shared) the configure script tells, that I have to use "--disable-static --enable-shared" in order to create the library files. You can only build one library type at once on MinGW. Specify --disable-static --enable-shared to only build the shared libraries. To build only the static libraries you do not need to pass additional options. When using both options I only get smaller dll files. Some weeks ago there was a large "avformat.dll" which I *only* needed for creating video files. Now I have to use all libraries. The smaller ffmpeg.exe (about 69 kb) crashes if I run it (access violation at 0xc00..05). Which configuration do I have to choose now in order to create a "large" avformat.dll I am sorry, that I have so many questions. Thank you all for helping. Lars

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Re: ffmpeg.exe does not understand my command line
by herve.flores＠free.fr 31 Mar '06

31 Mar '06

Le 31 mars 06 ? 14:32, ffmpeg-user-request at mplayerhq.hu a ?crit : > ------------------------------ > > Message: 8 > Date: Fri, 31 Mar 2006 14:31:16 +0200 > From: "Lars Blumberg" <Lars.Blumberg at aquasoft.de> > Subject: [Ffmpeg-user] ffmpeg.exe does not understand my command line > To: ffmpeg-user at mplayerhq.hu > Message-ID: <e0j7el$mjj$1 at sea.gmane.org> > >> It works. Please update to latest cvs. > > I am using the following commands to build a ffmpeg which should > create PSP > video files: > > make clean > rm config.h > rm config.mak > > ./configure --enable-memalign-hack --enable-mingw32 --prefix=/home > --enable-faac > --extra-cflags=-Is:/faac/include --extra-ldflags=-Ls:/faac/ > libfaac/.libs --enable-shared > > make > > I then used the command > > $ ffmpeg -y -i test.mpg -title "blabla" -bitexact -s 320x240 -r > 29.97 -b > 480 -ac 2 -ar 24000 -ab 64 -f psp -muxvb 768 M4V12346.mp4 > > to convert a mpg video file to psp format. I received the following > error > message: > > FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard > configuration: --enable-memalign-hack --enable-mingw32 --prefix=/ > home --enable-faac > --extra-cflags=-Is:/faac/include --extra-ldflags=-Ls:/faac/ > libfaac/.libs > libavutil version: 49.0.0 > libavcodec version: 51.8.0 > libavformat version: 50.4.0 > built on Mar 31 2006 14:19:03, gcc: 3.4.2 (mingw-special) > Input #0, mpeg, from 'test.mpg': > Duration: 00:03:28.4, start: 0.571756, bitrate: 658 kb/s > Stream #0.0[0x1e0], 24.00 fps(r): Video: mpeg1video, yuv420p, > 320x240, 512 > kb/s > Stream #0.1[0x1c0]: Audio: mp2, 44100 Hz, stereo, 128 kb/s > Unable for find a suitable output format for '320x240' > > (I used the ffmpeg.exe from PSP Video 9 and it worked fine) > > Even if I don't use "-s 320x240" option ffmpeg then tells me > "Unable for find a suitable output format for '29.97'" > > What is going wrong? Why doesn't my ffmpeg.exe not correctly > understand the > parameters. ffmpeg.exe of "PSP Video 9" does understand this line and > creates a correct psp video file. > > Thanks for any suggestions! > Best regards > Lars parameters go 2 per 2, if you don't specify "-bitexact", the last word will be consider as its argument then -bitexact "eat" "-s" and you have a "320x240" without any utility (then an error) if you suppress "-s 320x240", the "-bitexact" search for its arguments and find "-r" then you have an error with "29.97" etc bye Herv?

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output_example does not create valid MP4 file
by Lars.Blumberg＠aquasoft.de 31 Mar '06

31 Mar '06

Hello everyone! Since I have problems creating PSP video files I tried to create a simple mp4 file using output_example.exe. So I run output_example.exe c:\test.mp4 and I received the output: Output #0, mp4, to 'c:\test.mp4': Stream #0.0, -1.#J fps: Video: mpeg4, yuv420p, 352x288, q=2-31, 400 kb/s Stream #0.1: Audio: aac, 44100 Hz, stereo, 64 kb/s Ffmpeg is generated as follows: ffmpeg version CVS, build 3342336, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-shared --enable-memalign-hack --enable-mingw32 --extr a-cflags=-I/local/include --extra-ldflags=-L/local/lib --prefix=/home --disable- debug --disable-ffserver --disable-ffplay --enable-amr_nb --enable-amr_wb --enab le-faac --extra-cflags=-Id:/faac/include --extra-ldflags=-Ld:/faac/libfaac/.libs Even VLC cannot play the file with sound (only the video stream is played). Can you please generate a MP4 file on your computer and try to run it? That would help me. Thanks a lot in advance. Lars

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