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

Using mencoder to convert wmv3 to flv
by scott＠hawkee.com 19 Oct '05

19 Oct '05

I know ffmpeg can't decode wmv3, but I found that mencoder can do it with the codec dll's. I've successfully compiled the latest non-CVS release with the codecs and was able to convert a wmv3 to flv. Unfortunately there are problems. The resulting flv file plays, but the sound cuts out after about 2 seconds while the video plays in fast foward. I'd like to figure out what the problem is. I tried the CVS version of MPlayer, but that didn't work too well at all. I think the latest release version works better. Here is the command I'm using: mencoder movie.wmv -o movie.flv -of lavf -ovc lavc -oac lavc -lavcopts vcodec=flv:vbitrate=250:autoaspect:mbd=2:mv0:trell:v4mv:cbp:last_pred=3: predia=2:dia=2:precmp=2:cmp=2:subcmp=2:preme=2:turbo:acodec=mp3: abitrate=56 -vf scale=320:240 -srate 22050 -af lavcresample=22050 -endpos 02:00 This works beautifully converting an mpg to flv, but it just refuses to produce a proper flv based on wmv3. I've tried a ton of combinations of these parameters with no luck. I've even tried to covert the wmv to an mpg, avi or mov. None of these worked at all. It would actually encode the file, but the resulting mpg or avi errored out in my players, so it basically produced a bad file. If I could convert to mpg then conver that to flv that would be fine. I just want to end up with an flv version of any wmv3 that's thrown at me. Any tips will be greatly appreciated! Thank you, - Scott

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[Ffmpeg-user-old] Re: [Ffmpeg-user] Does ffmpeg support vp6?
by apuntesus＠yahoo.com 18 Oct '05

18 Oct '05

VP6 decoding would be supported in next versions of ffmpeg? __________________________________ Start your day with Yahoo! - Make it your home page! http://www.yahoo.com/r/hs ------------------------------------------------------- This SF.Net email is sponsored by: Power Architecture Resource Center: Free content, downloads, discussions, and more. http://solutions.newsforge.com/ibmarch.tmpl _______________________________________________ Ffmpeg-user mailing list Ffmpeg-user at lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ffmpeg-user

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mjpeg: unsupported coding type (c2)
by xiaogangz＠acm.org 18 Oct '05

18 Oct '05

Dear all, When try to resize some jpeg file, I got an error 256 with the following messages: ffmpeg version CVS, build 3276800, Copyright (c) 2000-2004 Fabrice Bellard configuration: built on Oct 18 2005 23:48:18, gcc: 3.3.5 (Debian 1:3.3.5-13) [mjpeg @ 0x83903b0]mjpeg: unsupported coding type (c2) The command I was using was: ffmpeg/ffmpeg_CVS/ffmpeg -f image2 -i '/home//xz/src/otter1/A1_origin.jpg' -f image2 -s 100x100 -sameq -y '/home/xz/dst/otter1/A1_thumbnail.jpg' What is the "c2" type, and how can I get it work? Thanks in advance. Xiaogang Zhang

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Re: ffmpeg, mpeg2, and final cut (Mike Melanson)
by ski＠mediamatters.org 17 Oct '05

17 Oct '05

>> Howdy... >> >> We're running into a problem where we have a mpeg2 dump from a video >> card >> which we'd like to be able to throw into final cut. Unfortunately, final >> cut can't understand mpeg2 audio (even though quicktime can, grr!). So >> we >> need to change the format. We'd like to do this in the least cpu >> intensive, and least quality degrading way. >> >> We've tried just about every container format (mpg, avi, mov, mp4) and >> just about every audio codec (aac, ac3, pcm_s16le, etc.), and have found >> no combination that a) ffmpeg doesn't choke on and b) plays in >> quicktime. >> >> Is there perhaps a compatibility matrix of video/audio codecs and >> container formats somewhere? > > Around here, we know FFmpeg quite well. What we don't know is Final > Cut. Is this a trimmed down version of the Final Cut Pro program? Can > you provide a list of the features it does support? Final Cut Express is a trimmed down version of Final Cut Pro. On talking with the folks at apple, apparently mpeg2 audio is not supported and never will be (grr). So, we have to transcode into a different format. I ran a little test: for ext in avi mpg mov mp4 ; do for ac in ac3 mp3 aac pcm_s16le ; do ffmpeg -t 5 -i "foo.mpg" \ -vcodec copy -acodec $ac /archive/video/scratch/test-$ac.$ext ; done done done Out of all the files that generated, many generated errors when I tried to open them in quicktime (invalid format, among others), 1 had video but no audio (same problem we were looking to avoid) and 2 had audio but no video (specifically, pcm_s16le and aac audio in a .mov container), which is promising, because while encoding, I noticed this error message (same with both pcm_s16le and aac and other audio formats): [mov @ 0x4007e610]Warning, using MS style video codec tag, the file may be unplayable! So I'm thinking it's possible that by specifying the proper "apple style" video codec tag, the video will render ok in quicktime/final cut, which would save us a *lot* of pain (right now we're waiting 2x realtime for video to transcode before our video editors can even start downloading). So.... How do I tell ffmpeg to use a non-MS style video codec tag, and what should that tag be for mpeg2video? Cheers & Thanks again, Brian Brian Szymanski Software and Systems Developer Media Matters for America ski at mediamatters.org cell: 202.243.9007 work: 202.756.4128 home: 202.470.2578 skype: xbrianskix aim: xbrianskix

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Confirm subscription to gentoo-server@gentoo.org
by gentoo-server+help＠gentoo.org 17 Oct '05

17 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-39c96fe87308e055-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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Making windows streams with ffmpeg
by amadeus.stevenson＠gmail.com 17 Oct '05

17 Oct '05

Hello, I'm using ffmpeg-cvs (week or two old) and I'm having trouble with some windows streams. I'm using the videocodec wva2, and I can stream fine via apache (although inefficiently I'm told). However when I try the same video over a windows streaming server I get an "out of memory" error when the server starts to stream. Videos encoded through Adobe Premiere with windows media 8 codec are fine. Does this sound familiar to anyone? I'm already using ffmpeg successfully to encode mpegs from dv avi's, and some windows-friendly (ie. useable by the vast majority without having to download a codec) version of that dv avi would be brilliant. Otherwise, what free streaming server software would you recommend for linux? I've been told apache is not the way to go as it's not designed for efficient streaming. Regards, Amadeus

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Confirm subscription to gentoo-server@gentoo.org
by gentoo-server+help＠gentoo.org 17 Oct '05

17 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-46e09bb46504eab3-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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by ngsyhddium＠amazon.com 17 Oct '05

17 Oct '05

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ffmpeg, mpeg2, and final cut
by ski＠mediamatters.org 16 Oct '05

16 Oct '05

Howdy... We're running into a problem where we have a mpeg2 dump from a video card which we'd like to be able to throw into final cut. Unfortunately, final cut can't understand mpeg2 audio (even though quicktime can, grr!). So we need to change the format. We'd like to do this in the least cpu intensive, and least quality degrading way. We've tried just about every container format (mpg, avi, mov, mp4) and just about every audio codec (aac, ac3, pcm_s16le, etc.), and have found no combination that a) ffmpeg doesn't choke on and b) plays in quicktime. Is there perhaps a compatibility matrix of video/audio codecs and container formats somewhere? Or is there perhaps a semi-efficient way to downgrade mpeg2 video to mpeg1? We've tried ffmpeg, mencoder, and some other tools. All without success. Any pointers/ideas would be *very* much appreciated. Thanks in advance, Brian Szymanski Software and Systems Developer Media Matters for America ski at mediamatters.org

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by kperry＠studiokproductions.com 16 Oct '05

16 Oct '05

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