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

question about motion vectors visualization and search range
by hungusyd＠gmail.com 16 Oct '05

16 Oct '05

Dear All, I have tried to visualiza MVs by turning debug option on with MVs visualization but then I dont know where can i view that visualization. I want to increase the search-range of MV search, i saw the me-range option but the description doesnt say anything about search-range. How can I increase the search range? Thanks All

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Varying framerate input results in loss of a/v sync
by wpoland＠gmail.com 15 Oct '05

15 Oct '05

I'm trying to rencode an hdtv mpeg2 stream to dvd mpeg2 everything I am trying results in horrible a/v sync. In running some commands from tovid by hand, I noticed that the input stream seems to switch back and forth from 24 to 30 fps. Does anyone have any advice on handling such a stream to conserve a/v sync? Thanks.

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Confirm subscription to gentoo-server@gentoo.org
by gentoo-server+help＠gentoo.org 15 Oct '05

15 Oct '05

Hi, this is the mlmmj program managing the mailinglist gentoo-server at gentoo.org To confirm you want the address ffmpeg-user at mplayerhq.hu added to this list, please send a reply to gentoo-server+confsub-21aed569630aa8d3-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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error compiling on AIX 5.2
by alvarez＠ac.upc.edu 14 Oct '05

14 Oct '05

Hi I am trying to compile ffmpeg in a system with Power4 processors and AIX-5.2 operating system. I am using a very recent version of ffmpeg downloaded from cvs on october 13th. the configuration command is like this: ./configure --disable-ffserver --disable-ffplay --make=gmake When I run the compilation I obtain an error in the compilation of grab.c. I am going to use ffmpeg for MPEG-2/4 and H264 decoding, and because of that I think that I do not need the "Linux video grab interface" defined in grab.c Is thar rigth? How can I disable this option in order to complete the compilation on my system? Thanks in advance Mauricio Alvarez p.d. error output gcc -O3 -g -Wall -Wno-switch -I.. -I'/scratch_tmp/alvarez/media/ffmpeg' -I'/scratch_tmp/alvarez/media/ffmpeg'/libavutil -I'/scratch_tmp/alvarez/media/ffmpeg'/libavcodec -DHAVE_AV_CONFIG_H -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE -c -o grab.o grab.c In file included from avformat.h:18, from grab.c:19: avio.h:6: warning: redefinition of `offset_t' /usr/local/gcc3.1/lib/gcc-lib/powerpc-ibm-aix5.2.0.0/3.1/include/sys/types.h:649: warning: `offset_t' previously declared here grab.c:26:28: linux/videodev.h: No such file or directory grab.c:38: field `video_cap' has incomplete type grab.c:39: field `audio_saved' has incomplete type grab.c:41: field `gb_buffers' has incomplete type grab.c:42: field `gb_buf' has incomplete type grab.c:52: confused by earlier errors, bailing out gmake[1]: *** [grab.o] Error 1 gmake[1]: Leaving directory `/scratch_tmp/alvarez/media/ffmpeg/libavformat' gmake: *** [lib] Error 2

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m4v poor decoding quality
by sdhays＠neon.com.tw 14 Oct '05

14 Oct '05

I have an MPEG-4 video ES file generated with a hardware encoder. Muxing this file to an AVI and playing with DivX 6.0 Beta for Mac shows high quality, but playing this file (or the AVI) with ffplay and MPlayer shows some distortions and generally low quality while not generating any error messages. The file was encoded with ASP at 1 Mb/s bit rate using variable bit rate. I'd like to know why playback is so good with DivX and so poor with ffmpeg (because ffmpeg generally has a great MPEG-4 decoder). The ftp.mplayerhq.hu FTP server won't let me create directories (550 Create directory operation failed.) or upload files (553 Could not create file.) to /MPlayer/incoming, so I've placed the file and the description at: http://www.neon.com.tw/download/pr818s.sep05.1Mb.vbr.m4v (~1MB) http://www.neon.com.tw/download/pr818s.sep05.1Mb.vbr.txt Has the directory been locked because of stupid warez uploaders? I'll upload the files as soon as anonymous upload has been re-enabled. Thanks, Scott ------------------------------------------------------------------------ ------ Scott Hays R&D Engineer http://www.neon.com.tw/ Neon Advanced Technology Co., Ltd.

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Welcome to gentoo-server@gentoo.org
by gentoo-server+help＠gentoo.org 13 Oct '05

13 Oct '05

Welcome! You have been subscribed to the gentoo-server at gentoo.org mailinglist. To unsubscribe send a mail to: gentoo-server+unsubscribe at gentoo.org And for help send a mail to: gentoo-server+help at gentoo.org

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Goodbye from gentoo-server@gentoo.org
by gentoo-server+help＠gentoo.org 13 Oct '05

13 Oct '05

Goodbye! You have been removed from the gentoo-server at gentoo.org mailinglist.

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Confirm unsubscribe from gentoo-server@gentoo.org
by gentoo-server+help＠gentoo.org 13 Oct '05

13 Oct '05

Hi, this is the mlmmj program managing the mailinglist gentoo-server at gentoo.org To confirm you want the address ffmpeg-user at mplayerhq.hu removed from this list, please send a reply to gentoo-server+confunsub-6251e1a727d4b2ba-ffmpeg-user=mplayerhq.hu at gentoo.org Your mailer probably automatically replies to this address, when you hit the reply button. If you're not subscribed with this list, you will recieve no reply. You can see in the envelope from header of a mail to the mailinglist, which address you're subscribed with.

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Confirm subscription to gentoo-server@gentoo.org
by gentoo-server+help＠gentoo.org 13 Oct '05

13 Oct '05

Hi, this is the mlmmj program managing the mailinglist gentoo-server at gentoo.org To confirm you want the address ffmpeg-user at mplayerhq.hu added to this list, please send a reply to gentoo-server+confsub-269e71c779143579-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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Beginner question
by mediastream＠gmail.com 12 Oct '05

12 Oct '05

Hadmut Danisch wrote: > Hi, > > I just tried to use ffmpeg for the first time and ran into a > problem which I didn't find a solution in the docs for. > > I have a video4linux tv card (works with motv and alike tools). > > When I just call (example from the docs) > > ffmpeg somefile > > ffmpeg opens the file for writing, and then issues an error > message that it doesn't find the video device. > > > ffmpeg -ad /dev/dsp -ar 44100 -ab 64 -acodec mp3 somefile > > records the TV sound correctly, but no image. > > > > > ffmpeg -vd /dev/video0 -ad /dev/dsp -acodec mp3 -ar 22050 -ab 64 -r 25 > -b 2048 -an -s 352x288 -t 10 video.mpg > -an = Audio None - just remove it. > records the TV video correctly, but without sound. > > What do I have to do to record both video and audio ? > > > regards > Hadmut >

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