September 2005 - ffmpeg-user - lists.ffmpeg.org

avcodec_sample compilation errors
by alvarez＠ac.upc.edu 22 Sep '05

22 Sep '05

Hi I traying to compile the sample code for using libavcodec that is available from the short tutorial in http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html but I have some compilation problems. I am using a very recent cvs version of ffmpeg: ffmpeg version CVS, build 3276800, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-xvid --enable-x264 --enable-gpl built on Sep 21 2005 18:51:17, gcc: 3.3.5 (Debian 1:3.3.5-8ubuntu2) This is my compilation command: g++ -c avcodec_sample.cpp -I./libavformat -I./libavcodec -I./libavutil and this is the error output: avcodec_sample.cpp: In function `int main(int, char**)': avcodec_sample.cpp:149: error: request for member `codec_type' in ` pFormatCtx->AVFormatContext::streams[i]->AVStream::codec', which is of non-class type `AVCodecContext*' avcodec_sample.cpp:158: error: cannot convert `AVCodecContext**' to ` AVCodecContext*' in assignment Any suggestion to overcome this problem is welcome thanks in advance Mauricio Alvarez

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consulting work
by ducky＠flukiest.com 21 Sep '05

21 Sep '05

Anyone on this list do any consulting work with ffmpeg? There are a couple things that I cannot seem to solve....and have posted questions to the list but never got a response. 1. I am getting a error converting a .3g2 file to .flv. It is saying that the "Resampling with input channels greater than 2 unsupported". I tried passing the "-ac2" switch but that did not seem to do the trick. Below is the command and output. [root at yosemite movies]# ffmpeg -i Video_082305_001.3g2 -hq -acodec mp3 -ar 44100 -ab 64 -ac 2 -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 Aborted If I ran it with the "-an" switch it worked without sound, however thats not a option. The funny thing is .3gp files convert just fine. 2. Has anyone seen issues with quicktime not syncing correctly after you convert it to flv? I am finding this happens with quicktime files that return framerates in the 100's. [root at yosemite 5024]# movieinfo ../../../../videos/91/10/119/PICT0185.MOV width: 320 height: 240 frame rate: 600.00 duration: 45.53 frame count: 27320 has audio: 1 If the frame rate is like 15 - 20 it works fine. http://www.flukiest.com/c/picture.cgi?f_image_id=33468 http://www.flukiest.com/c/picture.cgi?f_image_id=33302 are examples of a flv with syncing issues. It also does not seem to help if I pass the -r option to ffmpeg option to ffmpeg to force a certain frame rate in the finalize flv.

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silent mode?
by dgiet＠edillia.com 21 Sep '05

21 Sep '05

I have a windows machine so i cannot use "2>/dev/null" Is there something like this on windows? I try to integrate ffmpeg with a ColdFusion application. I need that ffmpeg be silent (no output) or better write the output into a log file. I have looked the documentation but i did not find nothing. Thanks for your help, Didier

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silent mode?
by dgiet＠edillia.com 21 Sep '05

21 Sep '05

I have a windows machine so i cannot use "2>/dev/null" Is there something like this on windows? I try to integrate ffmpeg with a ColdFusion application. I need that ffmpeg be silent (no output) or better write the output into a log file. I have looked the documentation but i did not find nothing. Thanks for your help, Didier

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silent mode?
by dgiet＠edillia.com 21 Sep '05

21 Sep '05

Is it possible to use ffmpeg in silent mode? Thanks in advance, Didier

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help: H.263 and RTP packets and GOB
by sravipooji＠yahoo.com 21 Sep '05

21 Sep '05

Hi all, I want to send encoded .h263 data over the network using RTP packets. The slice_structure is set for ffmpeg code that would use slice boundaries and to use these headers instead of GOB headers, i need to use H.263+ payload format. Can anyone tell me what is the PAYLAOD TYPE of H.263+. The RFC's specify it as "dynamic". But to use the slice header format and not GOB, i need to use H.263+. Must more important, CAN ANYONE PLZ LET ME KNOW HOW TO ADD GOB HEADERS TO ENCODED DATA? I am using ffmpeg-cvs-2004-11-10 version of it and i am running this command : ./ffmpeg -vd /dev/video0 -an -s 352*288 output_file.h263 to record encoded data. How can i add GOB headers to the encoded stream? __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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newbee question
by marco＠mbuzzy.com 21 Sep '05

21 Sep '05

Hello, I just downloaded, configured and compiled ffmpeg perfectly fine. Now comes the hard part. I am trying to use it to convert an avi to flv and when I run: ./ffmpeg -i marco.avi -acodec mp3 -ar 22050 -ab 32 -f flv -s 320x240 -aspect 4:3 -y bob.flv ffmpeg version CVS, build 3276800, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-mb3lame --enable-gpl built on Sep 20 2005 16:14:35, gcc: 3.2.3 20030502 (Red Hat Linux 3.2.3-24) Input #0, psxstr, from 'marco.avi': Duration: N/A, bitrate: N/A Stream #0.0: Audio: adpcm_xa, 18900 Hz, stereo Output #0, flv, to 'bob.flv': Stream #0.0: Audio: 0x0000, 22050 Hz, stereo, 32 kb/s Stream mapping: Stream #0.0 -> #0.0 Unsupported codec for output stream #0.0 As a matter of fact I get this error "Unsupported codec" error NO matter WHAT I try to convert to. I have attempted going to Quick time (mov) and: ./ffmpeg -i marco.avi test.mov ffmpeg version CVS, build 3276800, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-mb3lame --enable-gpl built on Sep 20 2005 16:14:35, gcc: 3.2.3 20030502 (Red Hat Linux 3.2.3-24) Input #0, psxstr, from 'marco.avi': Duration: N/A, bitrate: N/A Stream #0.0: Audio: adpcm_xa, 18900 Hz, stereo File 'test.mov' already exists. Overwrite ? [y/N] y Output #0, mov, to 'test.mov': Stream #0.0: Audio: 0x0000, 18900 Hz, stereo, 64 kb/s Stream mapping: Stream #0.0 -> #0.0 Unsupported codec for output stream #0.0 so I am a little confused here. Looking at the documentation I find that flv and swf is indeed supported, and it even seeems to recognize it ,I think. Any help will be greatly appreciated. Thank you, Marco

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ffmpeg & a/v frame grabbing
by panayotis＠panayotis.com 20 Sep '05

20 Sep '05

Hello! I am new in this list & ffmpeg - I hope you won't find my question too naive! I would like to know if it is possible to grab only a specific frame from a video stream (e.g. an AVI) and save it in a file (or even dump it in raw format into std.out) For example if it is possible to say something like "fetch frame #250 and dump it into FILE" ? The same question goes also to audio stream: is it possible to say "get audio 200.2 sec -> 202.4 sec and dump it to FILE" I know that this oculd be done writing a simple C application, but I'd prefer a higher level approach. I'd like to do this from inside a java program and although I know that java has the JNI for these works, I'd prefer not to use it. Instead I'd prefer to use an already compiled program, just like ffmpeg to do the work. Is this possible with ffmpeg? Thank you

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ffpmeg fails to compile on Solaris 10 x86
by sujit.jagdev＠casero.com 20 Sep '05

20 Sep '05

rtp.c: In function `rtp_parse_mp4_au': rtp.c:321: error: invalid operands to binary & rtp.c:321: error: invalid operands to binary >> gmake[1]: *** [rtp.o] Error 1 gmake[1]: Leaving directory `/export/home/ffmpeg/ffmpeg/libavformat' I have compiled ffpmeg on debian, red hat, Solaris 8 ( SPARC ) and Solaris 9 (SPARC ) But I get the above compilation errors on Solarisa 10 x86. SunOS proto1 5.10 Generic i86pc i386 i86pc Sujit

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Why do I get "av_alloc_format_context"?
by fredand44_java3d＠hotmail.com 20 Sep '05

20 Sep '05

Hello! I'm trying to convert a *.mov to *.dv to be able to use it in Kino. But when I try to cobvert it with ffmpeg I get this error: [fredrik at Stationary Desktop]$ ffmpeg -i test.mov test.dv ffmpeg version 0.4.9-pre1, build 4718, Copyright (c) 2000-2004 Fabrice Bellard built on Dec 10 2004 17:35:43, gcc: 3.4.3 (Mandrakelinux 10.2 3.4.3-1mdk) Input #0, mov, from 'test.mov': Duration: 00:05:46.0, bitrate: 185 kb/s Stream #0.0: Video: mjpeg, 640x480, 0.50 fps ffmpeg: symbol lookup error: ffmpeg: undefined symbol: av_alloc_format_context [fredrik at Stationary Desktop]$ ffmpeg -i test.mov test.dv Do you know what the problem is??? My formats is listed below! Best regards Fredrik [fredrik at Stationary Desktop]$ ffmpeg -formats ffmpeg version 0.4.9-pre1, build 4718, Copyright (c) 2000-2004 Fabrice Bellard built on Dec 10 2004 17:35:43, gcc: 3.4.3 (Mandrakelinux 10.2 3.4.3-1mdk) File formats: E 3gp E ac3 E alaw E asf E asf_stream E au E audio_device E avi E crc E dv E ffm E flv E gif E h263 E h264 E image E imagepipe E m4v E mjpeg E mov E mp2 E mp4 DE mpeg E mpeg1video E mpegts E mpjpeg E mulaw E null E nut E rawvideo E rm E rtp E s16be E s16le E s8 E singlejpeg E swf E u16be E u16le E u8 E vcd E vob E wav E yuv4mpegpipe Image formats: D pnm E pbm E pgm E ppm DE pam DE pgmyuv DE yuv DE png DE jpeg DE gif Codecs: D V 4xm DEA ac3 DEA adpcm_4xm DEA adpcm_ima_dk3 DEA adpcm_ima_dk4 DEA adpcm_ima_qt DEA adpcm_ima_wav DEA adpcm_ms DEV D asv1 DEV D asv2 D V D cljr D V cyuv D A dvaudio D V D dvvideo DEV D ffv1 DEVSD flv DEVSDT h263 D VSD h263i EV h263p D V DT h264 DEVSD huffyuv D V indeo3 D A interplay_dpcm D V D interplayvideo EV ljpeg D A mace3 D A mace6 D V D mdec DEV mjpeg D V mjpegb DEA mp2 D A mp3 DEVSDT mpeg1video DEVSDT mpeg2video DEVSDT mpeg4 DEVSD msmpeg4 DEVSD msmpeg4v1 DEVSD msmpeg4v2 DEA pcm_alaw DEA pcm_mulaw DEA pcm_s16be DEA pcm_s16le DEA pcm_s8 DEA pcm_u16be DEA pcm_u16le DEA pcm_u8 DEV rawvideo D A real_144 D A real_288 D A roq_dpcm D V D roqvideo DEV D rv10 D V D svq1 D VSD svq3 D V D vcr1 D V vp3 D A wmav1 D A wmav2 DEVSD wmv1 DEVSD wmv2 D A xan_dpcm D V D xan_wc3 Supported file protocols: file: pipe: udp: rtp: tcp: http: Frame size, frame rate abbreviations: ntsc pal qntsc qpal sntsc spal film ntsc-film sqcif qcif cif 4cif Motion estimation methods: zero(fastest) full(slowest) log phods epzs(default) x1 Note, the names of encoders and decoders dont always match, so there are several cases where the above table shows encoder only or decoder only entries even though both encoding and decoding are supported for example, the h263 decoder corresponds to the h263 and h263p encoders, for file formats its even worse [fredrik at Stationary Desktop]$ _________________________________________________________________ Chatt: Tr?ffa nya n?tkompisar p? Habbo Hotel http://habbohotel.msn.se/habbo/sv/channelizer

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