October 2005 - MEncoder-users - lists.mplayerhq.hu

audio sync failure
by Uzu Maki 24 Nov '05

24 Nov '05

hi everyone, I am new at using mencoder... I am using the Debian unstable version. here is how I use it: " mplayer -vo null -ao pcm:file=audio.wav dvd://1 oggenc -b 128 audio.wav nice -n 3 mencoder -nosound -ovc xvid -xvidencopts bitrate=1500:pass=1 -vf crop=720:368:0:60,scale=680:328,pp=lb dvd://1 -o /dev/null nice -n 3 mencoder -nosound -ovc xvid -xvidencopts bitrate=1500:pass=2 -vf crop=720:368:0:60,scale=680:328,pp=lb dvd://1 -o "movie.avi" ogmmerge -o movie.ogm movie.avi audio.ogg " this work like a charm for small vob files like cookery/music shows recorder from TV on DVD. but when I try to encode larger files (>2Go) I get a delay (not constant) in the audio stream. Impossible to get the sync working... even though the audio and the video are separately perfect... I've seen that I am not alone... http://www.dealdatabase.com/forum/showthread.php?t=45451&page=3 but I can't get over that trouble... If someone could point me in the right direction... thank you very much in advance ! François PS: I tried with mp3 too... average or constant bitrate... avi, ogm... no change...

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mpeg2 split
by Németh Péter 10 Nov '05

10 Nov '05

Hi everybody! i want to split a 1,7 gb mpeg2 file to 2 parts how can i make it? i try: C:\Program Files\mplayer>mencoder "E:\movie\input.mpg" -o "out.mpg" -ss 1mb -endpos 70mb -oac copy -ovc copy it make a 70 mb movie, but i cannot playback it why? the ovc set copy... pls help, thx

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WMV3/WMV9 encode
by silent tone 07 Nov '05

07 Nov '05

The information page says that transcoding to WMV3 is possible, but I haven't found the parameters to do this. I have downloaded the full win32 codec pack, but I've only managed to encode WMV1. Advice?

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Finding out file duration
by Jean Hoderd 31 Oct '05

31 Oct '05

Hi, Is there an option in mplayer/mencoder to return the duration of a movie file? Sorry if the solution is obvious, but I could not find any other way other than to use -benchmark, which is of course very slow. Thanks for your help! Regards, Jean __________________________________ Yahoo! FareChase: Search multiple travel sites in one click. http://farechase.yahoo.com

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ANNOUNCE: gAVI2MPEG2
by Tomáš Bažant 27 Oct '05

27 Oct '05

Hello as i promised a few week ago, i've finally finished the first public version of my tool for converting AVI files into 'dvdauthor compliant' MPEG2 file. It uses mencoder only and the result is ALWAYS: PAL 25fps, AC3 audio. You can find it at http://avitools.profitux.cz/ (the pages are not yet english, but the program is) or download it directly from http://avitools.profitux.cz/download/gavitools-0.1.tgz Feedback appreciated toba

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MEncoder and MPlayer breaking a/v sync in certain MPEG4 avi files
by Mark Nagy 26 Oct '05

26 Oct '05

I know I already sent this, but it "silently failed", leaving me to wonder whether the fact that it didn't show up was a deliberate rejection or a technical problem. So I'm trying it again without the "reply-to," and if I receive some message indicating that I should drop this I will of course comply. I apologize if I am violating some protocol here - I looked at what seemed to be the relevant documentation, and didn't see anything at the time indicating that to be the case. This seems to be an issue affecting both mencoder and mplayer, and I haven't been able to get on the site to sign up for either list, so I'm trying gmane. I looked over the documentation, including the part about known issues, for some time before saying anything. Just so the context is clear (don't misunderstand; this is not a VirtualVCR question, as I will explain) I have been using VirtualVCR, with ffdshow in constant quantizer mode and with no audio compression, in order to get high-quality real-time video capture, and then using MEncoder (most recently CVS-050929-14:21-3.4.4, though I saw the same problem in 1.0pre7 and 1.0pre7try2, and have never encountered a version that didn't have it) to recreate the recordings using slower but less bit-hungry settings (lavc and lame with sub-options that I can specify if necessary, but, as I will explain, the problem seems to be somewhere other than in the codecs). The initial VirtualVCR output plays back with correct A/V sync (or close enough that there is no obvious problem) in Winamp and Windows Media Player under Windows and in Xine under Linux, but not in MPlayer: Under Linux, MPlayer shows a gradually increasing gap as one seeks farther into the file, progressing to obvious alternating periods of silent lip motion and disembodied voices by about the 1 1/2 - 2 hour point; under Windows, MPlayer refuses to seek at all in the more-than-2-gigabyte MPEG4 avi files, even when compiled with --enable-largefiles. Under both Windows and Linux, MEncoder will reencode the files, but the resulting output then shows the same progressive desynchronization in Winamp, Windows Media Player, and Xine as in MPlayer, even if I use -mc 0 and -noskip. A given segment of the recording will show the same amount of desynchronization if I extract it from the original with -ss and -endpos as if I first reencode the entire original and then seek within the resulting output file. And if I don't actually reencode at all, but just feed the original VirtualVCR recording through MEncoder using -oac copy -ovc copy -mc 0 -noskip, the output shows the same loss of synchronization in all four players, even though the input plays back correctly in all except MPlayer. Is there some way to override this behavior? I've been looking over the documentation, and haven't seen anything obvious, nor has anything I have tried worked so far. The information needed for correct synchronization is apparently present in the original VirtualVCR recordings, since the other players all manage it without apparent delay, but nothing I've tried yet seems to persuade MPlayer or MEncoder to recognize it. It might be nice if there was a switch or something to use Xine's approach to synchronization, since it apparently works with some files that the default approach does not. I guess this is either a bug report, a feature request, or a request for information on the current features, beyond what appears in the documentation, depending on how much of this behavior is intentional and how much can currently be overriden.

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Adding a logo to video
by Fredrik Eriksson 25 Oct '05

25 Oct '05

Hello. I want to add a logo to the video, a picture that should be displayed in the upper right corner of the video for a few seconds, but I can't seem to find a video filter that can do that. The closest thing I find is the bmovl filter, but I have no idea about how to use it (the man page tells me just about nothing). So can the bmovl filter be used to do this, and if so, how? or is there another filter that can be used? Thank you.

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Converting wmv3 to flv
by Scott 25 Oct '05

25 Oct '05

I'm trying to convert any number of random wmv3 files to flv. This needs to work universally and quickly, so I'm being extra careful to do this properly. I've figured out how to convert a single audio channel wmv3 to flv with this command: mencoder movie.wmv -o movie.flv -of lavf -ovc lavc -oac lavc -lavcopts vcodec=flv:vbitrate=250:autoaspect:acodec=mp3: abitrate=56 -vf scale=320:240 -srate 22050 -af lavcresample=22050 -ofps 15 This works pretty well, but the audio is slightly out of sync with the video. Another problem is I get a Segmentation Fault when the wmv3 file has a 2 channel audio track. I can convert the wmv3 *video* to flv by using -nosound, but I need the sound to be included. If you have any insight into this, I'd be grateful. I got around this by doing mplayer -ao pcm to create a dump and then I used lame to convert it to mp3. Now my challenge is to remux this new audio track with the flv that was created with -nosound. I read in another post here that I need to use -ovc copy -oac copy and -audiofile, but I can't seem to figure out how it's done. mencoder went through the entire process but the mp3 wasn't added. I used this command: mencoder movie.flv -ovc copy -oac copy -audiofile audiodump.mp3 -o movie2.flv Something must be wrong with it. So I've got three problems: 1. Audio is out of sync when I convert a 1ch wmv3 to flv 2. Segmentation Fault when I try to convert a 2ch wmv3 to flv 3. I can't remux the separate audio mp3 into a -nosound flv file. Ideally I'd like to avoid using mplayer and lame as that adds too much time to the entire process. I'd like this process to happen in a matter of a couple minutes at the most. I think with mplayer I have to wait out the entire duration of the video to get the audiodump which is too long. I'm using the wmv9dmod.dll file from the mplayer website to decode my wmv3 files. Thank you, - Scott

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Dies on completion of 2nd pass, no output file
by David Ward 18 Oct '05

18 Oct '05

http://itdp.fh-biergarten.de/~itdp/html/mplayer-users/2005-04/msg00157.html I have the same problem as this chap does. Its VOB file as source. I am using MEncoder 1.0pre7-3.4.3 At the end of the 1st pass i get Pos:7229.9s 180780f (100%) 35fps Trem: 0min 1195mb A-V:0.081 [998:384] Skipping frame! success: format: 0 data: 0x0 - 0x0rem: 0min 1195mb A-V:0.021 [998:384] Win32 LoadLibrary failed to load: avisynth.dll, /usr/lib/win32/avisynth.dll, /usr/local/ lib/win32/avisynth.dll XMMS: found plugin: libcdaudio.so (CD Audio Player 1.2.10) XMMS: found plugin: libtonegen.so (Tone Generator 1.2.10) XMMS: found plugin: libwav.so (Wave Player 1.2.10) XMMS: found plugin: libspeex.so ( Speex plugin 0.9.1) XMMS: Closing plugin /usr/lib/xmms/Input/libspeex.so XMMS: Closing plugin /usr/lib/xmms/Input/libwav.so XMMS: Closing plugin /usr/lib/xmms/Input/libtonegen.so XMMS: Closing plugin /usr/lib/xmms/Input/libcdaudio.so ============ Sorry, this file format is not recognized/supported ============= === If this file is an AVI, ASF or MPEG stream, please contact the author! === Cannot open demuxer. Exiting... It still spits out a 20+mb log file. And at the end of the 2nd pass i get Pos:7229.7s 180776f (100%) 35fps Trem: 0min 1147mb A-V:0.083 [1000:319] Skipping frame! mencoder: ratecontrol.c:644: ff_rate_estimate_qscale: Assertion `picture_number<rcc->num _entries' failed. My command is: mencoder -of avi -sws 2 -vf scale=512:288 -ovc lavc \ -lavcopts vcodec=mpeg4:vme=4:mbd=1:vbitrate=1000:trell:vhq:vpass=1 \ -oac copy input.vob -loadidx -o /dev/null mencoder -of avi -sws 2 -vf scale=512:288 -ovc lavc -lavcopts \ vcodec=mpeg4:vme=4:mbd=1:vbitrate=1000:trell:vhq:vpass=2 \ input.vob -loadidx -o output.avi -oac \ mp3lame -lameopts mode=3:vbr=0:br=80:ratio=1 -------------- Regards David Ward

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avi ntsv -> dvd conversion problem
by Tomáš Bažant 13 Oct '05

13 Oct '05

Hi im finishing the first version of gAVI2DVD GUI over mencoder but came to a problem. if the source AVI is NTSC 23.976fps and has AC3 audio track, mencoder according to its documentation recommends use of -oac copy. Then the resulting DVD'fps is the same, 23.976 which is non-standard and my DVD player won't play it (i tried it - it got more and more jerky with time). I made a conclusion to convert it into PAL 25fps, but as long as I use -speed 25000/23976 along with -oac copy, the rusult is out of sync. If I try to convert such audio track into 2 channel AC3, mencoder complains and won't do it. Parhaps AC3->AC3 si hard for him. Could anyone help me with this? thanks

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