November 2006 - MEncoder-users - lists.mplayerhq.hu

What is the option for .configure that includes CD playing through CDROM-data-cable?
by Strong 28 Jan '07

28 Jan '07

I've downloaded the latest tar ball and want to configure then be able to play CDs through the data-cable I hove no sound cable from my CDROM. So how I can include this feature at configure stage?

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[MEncoder-users] On2 VP5 and VP62 in MPlayer 1.0rc1, please how...??
by Ratko Dakic 13 Jan '07

13 Jan '07

Hello, on http://www.mplayerhq.hu/design7/news.html page I see new MPlayer version "MPlayer 1.0rc1" and this: "The highlights of this release are native VC-1/WMV3, On2 VP5 and VP62 (used in some Flash video files) decoding" Is this mean that now we can encode .wmv/.avi/.mpeg etc. to .flv files with better quality???? How? I need command for that... Now I using this: mencoder input.wmv -o out_file.flv -of lavf -oac mp3lame -lameopts cbr:preset=56 -mc 0 -ovc lavc -lavcopts vcodec=flv:vbitrate=5000:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 -srate 22050 -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames what I must change? I need better quality because now is not very good... Thanks. -- Best regards, Ratko mailto:ratko@teol.net

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FLV format for web playing
by eduardo gargiulo 11 Dec '06

11 Dec '06

Hi all, I'm using mencoder to convert mpeg video to flv (mplayer's manual example). The file plays ok on standard FLV players, without size, duration, rate information but it doesn't matter righ now. The problem is that I can't play the file using web flv plugins. I've tested other flv files on same player/webserver and they runs ok, but I can't play flv files converted with mencoder. I've posted the resulting flv file on http://wi-fi.dyndns.org/~egargiulo/static/video/rodo.flv Any help would be appreciated. regards, -- edu4rd0g

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Re: MEncoder-users Digest, Vol 27, Issue 20
by rob pfile 05 Dec '06

05 Dec '06

RC wrote: > On Tue, 21 Nov 2006 08:13:17 -0800 > pfile at pacbell.net wrote: > > > if in theory the video still has the same length as it did > before, why > > would there be the need to change the A/ V sync? > > Because the container (PTS) says audio frame X should be playing when > video frame Y is displayed... If the two are substantially apart, > frames are added or removed. okay. this explains why mencoder puts a bunch of duplicate frames right in the beginning of my encode... its trying to fix the initial a/v sync. i had a bug (see below) but i think its fixed. whats interesting now is that if i allow mencoder to fix the initial sync, then periodically throughout the encode its dropping in extra frames. i guess unless there's a way to avoid this, i'll just use -mc 0 -noskip and use avisync afterwards to fix the initial sync. > > but if virtualdub/etc. can do this then there's no reason mencoder > > cant (given enough code :) it seems to me that the only way to fix > > this is to scale the audio, but i want to make sure that's > really the > > case before i go down that rathole. > > With the little info you have provided, all I can say is that numerous > people are using mencoder to do the exact same conversion you are > without any sync or framedrop/duplicates problems. the mail i almost sent to the list was very verbose but i decided to just cut to my question. as it turns out i had a bug in my decimation routine which was causing it to drop too many frames. i got sidetracked on the frame display time thing because i thought i had emitted exactly the right number of frames when in fact i had not. when using decimate=2 or tinterlace,pullup to go from 60p->24p, i'd always see skipped frames and duplicated frames, which i interpreted as the filter not dropping enough or too many frames. but when i started seeing the same thing with my code (which in theory should be perfect decimation), i started wondering if there was some other reason for the duplicate frames. thanks for the help, its always appreciated. rob

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Re: [MEncoder-users] Mencoder Voice De-Sync with MP3 Audio Codec
by Gary C. New 30 Nov '06

30 Nov '06

--- "Nico Sabbi" <nsabbi(a)email.it> wrote: > why 853:640 ? it's wrong and will likely lead to > suboptimal video enencodings The video footage was taken in a profile orientation (opposed to the normal landscape) and requires that it be rotated 90 degrees clockwise when transcoded. This provides the proper margins when scaled back to 640:480. If you know of a better way to do this, I would be interested in hearing how you did it. I also noticed with the rc1 version of mencoder and the latest codecs, that any quick, bright lights shown in the transcoded footage exhibits an extending, white horizontal line from the lighted object. Any ideas why this happens and any filters that might fix it? Respectfully, Gary ____________________________________________________________________________________ Cheap talk? Check out Yahoo! Messenger's low PC-to-Phone call rates. http://voice.yahoo.com

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encode audio to lpcm
by DD DD 30 Nov '06

30 Nov '06

Is there a way to encode a file to mpeg2 video + lpcm audio (the one thats used in dvd) ? I cannot find lpcm in mencoder documentation. D.

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[flv @ 0x85ffee0]dimensions not set + FPE
by Nick Fedchik 30 Nov '06

30 Nov '06

Hello! I need to convert MPEG TS to FLV, but got the error [flv @ 0x85ffee0]dimensions not set Floating point exception What the dimentions should I set? Fresh mencoder from Subversion used MEncoder dev-SVN-r21397-4.0.3 Valgrind <cmd> output: ... MUXER: Writing header... [flv @ 0x85ffee0]dimensions not set ==23538== Process terminating with default action of signal 8 (SIGFPE) ==23538== Integer divide by zero at address 0x6371EE37 ==23538== at 0x85CC748: __divdi3 (in /usr/local/bin/mencoder) ==23538== by 0x82062DC: compute_pkt_fields2 (utils.c:3104) My command line below: fnm@voodle-ci:/usr/local/src$ /usr/local/bin/mencoder ./dvb.ts -o ./output.flv -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames:format=flv -ovc lavc -lavcopts vcodec=flv:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 -srate 22050 -demuxer lavf -oac faac -ac ffmp3 -vf spp,scale -demuxer lavf CPLAYER: MEncoder dev-SVN-r21397-4.0.3 (C) 2000-2006 MPlayer Team CPUDETECT: CPU: Dual Core AMD Opteron(tm) Processor 285 (Family: 15, Model: 33, Stepping: 2) CPLAYER: CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1 CPLAYER: Compiled with runtime CPU detection. CPLAYER: success: format: 0 data: 0x0 - 0x1fe000 DEMUXER: libavformat file format detected. DEMUX: VIDEO: [mpg2] 704x576 0bpp 25.000 fps 3500.0 kbps (427.2 kbyte/s) MENCODER: [V] filefmt:35 fourcc:0x3267706D size:704x576 fps:25.00 ftime:=0.0400 CPLAYER: ========================================================================== DECAUDIO: Forced audio codec: ffmp3 DECAUDIO: Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders DECAUDIO: AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000) DECAUDIO: Selected audio codec: [ffmp3] afm: ffmpeg (FFmpeg MPEG layer-3 audio decoder) CPLAYER: ========================================================================== MUXER: ** MUXER_LAVF ***************************************************************** MUXER: You have certified that your video stream does not contain B frames. MUXER: REMEMBER: MEncoder's libavformat muxing is presently broken and will generate INCORRECT files in the presence of B frames. Moreover, due to bugs MPlayer will play these INCORRECT files as if nothing were wrong! ******************************************************************************* MUXER: OK, exit VFILTER: Opening video filter: [expand osd=1] VFILTER: Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1 VFILTER: Opening video filter: [scale] VFILTER: Opening video filter: [spp] CPLAYER: ========================================================================== DECVIDEO: Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b DECVIDEO: Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2)) CPLAYER: ========================================================================== MENCODER: Pos: 0.0s 2f (17%) 0.00fps Trem: 0min 0mb A-V:-0.004 [0:0] 1 duplicate frame(s)! MUXER: VIDEO CODEC ID: 22 MUXER: AUDIO CODEC ID: 15002, TAG: 0 MUXER: Writing header... [flv @ 0x85ffee0]dimensions not set Floating point exception -- Best regards, Nick Fedchik

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Mencoder Voice De-Sync with MP3 Audio Codec
by Gary C. New 30 Nov '06

30 Nov '06

As instructed, I upgraded my version of mplayer and mencoder to rc1. I also modified my mencoder options to use -ofps 30000/1001 without -mc 0 -noskip: mencoder test.mov -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd:tsaf -vf rotate=1,expand=853:640,scale=640:480,harddup -srate 48000 -af lavcresample=48000 -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:keyint=18:acodec=mp3:abitrate=192 -ofps 30000/1001 -o test.mpg This time it transcoded the file with very few skipped frames and synced the audio and video perfectly throughout the entire length of the file. Thank you for your excellent advice. Respectfully, Gary ____________________________________________________________________________________ Yahoo! Music Unlimited Access over 1 million songs. http://music.yahoo.com/unlimited

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[SOLVED] Video from JPG Files Problem
by Matt Malone 30 Nov '06

30 Nov '06

Hello All, About a month ago, I posted because I was trying to stitch together JPGs captured from an X-Windows display (the rendered output of a scientific program) into a video that was playable on any standard Windoze box. I was provided with many suggestions, which I appreciate. I describe here how I solved this problem, and I am explaining it in detail so it is clear and repeatable by others. Keep in mind, the people I will give my product to are complete ludites when it comes to computers so if it does not just work, it is broken. 1) I sized my X-window to be 640x480 pixels (write me for the code). 2) My program drew the graphics corresponding to the timestep (note, my program's timestep was 0.01 sec). 3) I captured the window as a jpg using import: sprintf(wstr,"import -silent -define jpeg:optimize-coding=false -quality 100 -window inky frames/% 05d.jpg\0",i); system(wstr); "inky" is just the name I gave my window in X-windows. The "-define jpeg:optimize-coding=false" was absolutely required because without it import was doing something with the encoding tables on the odd frame (groan) that ffmpeg and mencoder did not recognize. 4) I moved all of the analysis frames from a Linux box to a Windose box in \frames. 5) I took a frame into irfanview (could have used xv on the Linux side), cleared it, (to get a blank 640x480 jpg) and put titles in it and saved it as 00000.jpg in \fullvideo. 6) I used copy to make 10 title frames 0000[0..9].jpg, one by one 7) At the Windoze 2000 command line, I used: copy 0000*.jpg 0001*.jpg copy 0000*.jpg 0002*.jpg ... copy 0000*.jpg 0009*.jpg To make 1 second worth of titles, then copy 000*.jpg 001*.jpg etc to make 2, then 3 then 5 seconds of titles. 8) I then moved over my analysis frames to numerically follow the titles: copy ..\frames\000*.jpg 005*.jpg copy ..\frames\001*.jpg 006*.jpg etc I also created some blank frames to insert between bits but that is another story. I now had my video, complete with titles, in a sequence of JPG files. 9) I stitched the frames together on Windoze 2000 using ffmpeg: ffmpeg.exe -r 100 -an -i %05d.jpg out_100.mpg This will play with ffplay.exe: ffplay.exe out_100.mpg But it will not play properly on anything else mainly because the frame rate was too high. 10) To make something that Windoze media player will play or that I can make into a VCD, I created a script to copy every 3rd frame into another directory "\third" -- a little more C to author that Windoze .bat file. ffmpeg.exe -r 30 -an -i out_30.mpg This messed up the timebase just a little but by this point I did not care. 11) This will play in Windoze media player when clicked on, and I used it to author a VCD that just plays if you stick the VCD in most regular DVD players. I am confident that anyone who can write the analysis program in the first place can follow this recipe to make a video. After pulling my hair out for a while, moreso everytime I hard-crashed my Linux box with mencoder trying to make a .mpg file, I decided I did not have the hair to spare and I was pushing my luck with the journalling in the ext3 filesystem. I abandoned mencoder and its many variations of command lines that, even after reading the manual, I could not make produce a Windoze "just play the effing thing" file. Sorry guys, but mencoder and/or its documentation have to be just a little clearer for us regular programmer types who just want to use it, not take (yet another) degree in it. If anyone has a thoroughly tested, fool-proof, won't crash my Linux box again command line for mencoder, I would be happy to take my frames and try it and amend the procedure in this posting. BTW, on crashing my Linux box, mencoder: 4, all other programs I have written or used since 1995 together: 1, hardware failures: 3 -- Slackware all the way. Matt _________________________________________________________________ Ready for the world's first international mobile film festival celebrating the creative potential of today's youth? Check out Mobile Jam Fest for your a chance to WIN $10,000! www.mobilejamfest.com

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NTSC DVD to 25 fps MPEG
by Richard Bromley 29 Nov '06

29 Nov '06

Hi. I would like to copy an NTSC DVD title to a single .mpg file, preserving the original video and audio streams but changing the framerate to 25. It goes without saying the audio rate needs to change as well so that the audio stays in sync with the video. The DVD video is film encoded in the standard way at, that is, the majority is soft-telecined at 24000/1001 fps, with small hard-telecined segments mostly at scene boundaries. I have already tried the following: $ mencoder -oac copy -ovc copy -of mpeg -ofps 25 -speed 25025/24000 -vf softpulldown,filmdint,harddup dvd:// -o dvd.mpg No error messages are produced by mencoder, but the output file cannot be played back with mplayer. The error message given by mplayer is "MPEG: Missing video stream". I have tried other commands, the resulting output files of which could be played, but the decoder detected 24000/1001 fps progressive content and switched the framerate back to 23.976. Help is appreciated.

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