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

Can you slow down mencoder?
by Jonathan Lundberg 20 Aug '05

20 Aug '05

Hello all, My situation is that I need to encode the same content from a video grab card to two different bitrates at the same time. The files need to be ready for use at roughly the same time (ie, the end of the show!). Unlike Windows Media Encoder, or Helix Producer, it's not possible with mencoder to grab to two different output rates at the same time (or am I wrong???). What I have to do is grab from the tv capture card to filename.avi, and while it's still grabbing from the tv card, run mencoder against filename.avi to also produce an identical file at a lower bitrate. My problem is that the second mencoder runs faster than real time, catches up with the end of the file, and then exits while the primary encode is still running. Is it possible to slow down mencoder so that it also runs in realtime, so that if I start it running 10 seconds after the initial grab, it'll run second by second against the file being grabbed, instead of 'as fast as computerly possible'? Or is there some other way to feed the content of filename.avi into mencoder in real time for encoding? Cheers, Jonathan ****************************************************************************** The information in this e-mail is confidential and may be legally privileged. It is intended solely for the addressee. Access to this e-mail by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. Please note that emails to, from and within RTÉ may be subject to the Freedom of Information Act 1997 and may be liable to disclosure. ******************************************************************************

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a-v synchronization problems of some NTSC DVDs with -oac copy
by David Soukal 12 Jun '05

12 Jun '05

Hello, I have recently ran into A-V synchronization problems while encoding some NTSC DVDs. I looked at the mailing list archive and found very similar symptoms in a thread by Corey Hickey on March 15th ("a-v sync problems with pullup, softskip (only on some DVDs)"). I have studied the answers but I was unable to fix the problem. It seems that the problem was a bug in the code that has been fixed. But I didn't find a reference to the version of MPlayer that has the bug fixed. I'm using version 1.0pre6 compiled from sources on a Gentoo system (For Gentoo users: I had to recompile MPlayer recently with the dts flag to get FFMPEG support again.) To reiterate the problems. I have noticed a short sync delay (of order of ms) with some DVDs that I converted while there was no sync problem with other DVDs. All the DVDs are in the NTSC format. The original DVDs show no sync problems, of course. The problematic DVDs are stored progressive with exception of a couple of short scenes with telecined content. I used the following command line for the encoding: mencoder -vf pullup=2:2:4:4,softskip,crop=704:368:8:60 -ofps 23.976 -oac copy -ovc xvid -xvidencopts pass=1:${xvidencopts} -o movie.avi where $xvidencopts is xvidencopts="bitrate=1800:me_quality=6:nointerlacing:noqpel:gmc:trellis:quant_type=mpeg: vhq=4:autoaspect:chroma_opt:hq_ac:min_iquant=1:min_pquant=1:min_bquant=1". I use the same commands (with exception of the cropping parameters and bitrate) for all DVDs, with some it works with other I get the problem. So it seems that the problem must be in the DVDs themselves. Some observations that I made: 1) the sync problem would be there even if I omitted pullup and softskip filters. One DVD that I have has first telecined content in the middle of the movie, however the sync problems would be there from the very beginning (with or without pullup,softskip) 2) there would be no sync problem if I compressed the audio stream with lame instead of just copying it. 3) MEncoder issues "1 duplicte frame(s) found" warning now and then. A small fragment of the log: Pos: 0.0s 2f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] 1 duplicate frame(s)! ODML: vprp aspect is 16384:7220. ODML: vprp aspect is 16384:7220. Trem: 0min 0mb A-V:0.000 [0:0] 1 duplicate frame(s)! Pos: 0.3s 10f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] demux_mpg: 24fps progressive NTSC content detected, switching framerate. Pos: 17.4s 421f ( 0%) 53fps Trem: 48min 2133mb A-V:0.000 [2801:0] 1 duplicate frame(s)! Pos: 230.8s 5539f ( 4%) 45fps Trem: 44min 1007mb A-V:0.000 [1631:0] 1 duplicate frame(s)! Pos: 255.5s 6131f ( 4%) 45fps Trem: 43min 964mb A-V:0.000 [1554:0]] 1 duplicate frame(s)! Pos: 268.3s 6437f ( 5%) 45fps Trem: 43min 944mb A-V:0.000 [1518:0] 1 duplicate frame(s)! Pos: 269.2s 6459f ( 5%) 45fps Trem: 43min 943mb A-V:0.000 [1515:0] 1 duplicate frame(s)! Pos: 270.8s 6497f ( 5%) 45fps Trem: 43min 940mb A-V:0.000 [1509:0] 1 duplicate frame(s)! Pos: 275.4s 6607f ( 5%) 45fps Trem: 43min 933mb A-V:0.000 [1497:0] ... Is the message "duplicate frame(s)" a good or a bad thing? (I wasn't able to make out the right answer in the responses in Corey's thread) Why does it appear in progressive content? 4) I use Windows Smartripper to backup the DVDs and MPlayer seems to have wrong information about the length of the movie (checked on the OSD display). However the result is always OK (as far as length is concerned). I'm including this observation here only for completeness. (BTW: I have a very small Linux partition (3GB) so I have to grab the DVD on a Windows partition) 5) the sync problems exist only for some mixed-content DVDs not all of them. I'm using MEncoder only for a couple of months now. So I'm no expert. If I overlooked something obvious, I apologize in advance! Thank you for your thoughts/comments. David

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playback too fast
by Martin Ankerl 01 Jun '05

01 Jun '05

Hi! I have got a movie that identifies as a 25fps movie, but when I use mplayer to show it, it is too fast. I get the correct speed when I use: mplayer -fps 12.5 movie.avi I have tried to reencode the movie using this command: mencoder movie.avi -ovc copy -oac copy -fps 25 -ofps 12.5 -noskip But then the result is too slow. Does anyone have an idea what I can do to fix the movie? -- Martin Ankerl | http://martinus.geekisp.com/

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Encoding using mencoder from a TV V4L2 source.
by Craig Kadziolka 28 May '05

28 May '05

Hi, Im attempting to record television from a tv capture card under linux. The card works fine when using xawtv to watch tv through the card, however when I try to encode it on the fly using mencoder and then play it back with mplayer I have a problem with an annoying static-type line flickering through the picture at random intervals. I definately dont get this flicker when im watching tv through xawtv, so my guess is that its not a problem with the tv card itself? I dont have any problems with dropped frames, according to the output from mencoder. Perhaps i need to run some sort of filter or something? Does anyone have any ideas/advice? I can get more debugging info if necessary. Regards, Craig. This is the command line I use for mencode: mencoder tv:// -tv driver=v4l2:width=576:height=576:device=/dev/video0:immediatemode=0:forceaudio -o out.avi -ovc lavc -lavcopts vcodec=mpeg4:aspect=4/3 -aspect 4:3 -noautoexpand -oac lavc -endpos 00:00:30 And here is the output after running this: MEncoder 1.0pre7-3.3.4 (C) 2000-2005 MPlayer Team CPU: Advanced Micro Devices Athlon Thunderbird (Family: 6, Stepping: 2) Detected cache-line size is 64 bytes CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0 Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx success: format: 9 data: 0x0 - 0x0 TV detected! ;-) Selected driver: v4l2 name: Video 4 Linux 2 input author: Martin Olschewski <olschewski(a)zpr.uni-koeln.de> comment: first try, more to come ;-) Selected device: BT878 video (Leadtek WinFast 20 Tuner cap: Tuner rxs: LANG1 LANG2 Capabilites: video capture video overlay VBI capture device tuner read/write streaming supported norms: 0 = PAL; 1 = NTSC; 2 = SECAM; 3 = PAL-Nc; 4 = PAL-M; 5 = PAL-N; 6 = NTSC-JP; 7 = PAL-60; inputs: 0 = Television; 1 = Composite1; 2 = S-Video; 3 = Composite3; Current input: 0 Current format: BGR24 v4l2: current audio mode is : LANG1 [V] filefmt:9 fourcc:0x32315659 size:576x576 fps:25.00 ftime:=0.0400 ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 44100 Hz, 1 ch, s16le, 705.6 kbit/100.00% (ratio: 88200->88200) Selected audio codec: [pcm] afm:pcm (Uncompressed PCM) ========================================================================== ========================================================================== Opening video decoder: [raw] RAW Uncompressed Video VDec: vo config request - 576 x 576 (preferred csp: Planar YV12) VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is 1.33:1 - prescaling to correct movie aspect. videocodec: libavcodec (576x576 fourcc=34504d46 [FMP4]) Selected video codec: [rawyv12] vfm:raw (RAW YV12) ========================================================================== Building audio filter chain for 44100Hz/1ch/s16le -> 44100Hz/2ch/s16le... Writing AVI header... ODML: vprp aspect is 4:3. ODML: vprp aspect is 4:3. Pos: 0.0s 1f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] Pos: 0.1s 2f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] Pos: 0.1s 3f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] Pos: 0.2s 4f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] Pos: 0.2s 5f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] Pos: 0.2s 6f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] Pos: 0.3s 7f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] Pos: 0.3s 8f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] ... pattern continues exactly the same ... Pos: 29.8s 745f ( 0%) 25fps Trem: 0min 0mb A-V:0.000 [862:223] Pos: 29.8s 746f ( 0%) 25fps Trem: 0min 0mb A-V:0.000 [861:224] Pos: 29.9s 747f ( 0%) 25fps Trem: 0min 0mb A-V:0.000 [861:223] Pos: 29.9s 748f ( 0%) 25fps Trem: 0min 0mb A-V:0.000 [861:223] Pos: 30.0s 749f ( 0%) 25fps Trem: 0min 0mb A-V:0.000 [861:223] Pos: 30.0s 750f ( 0%) 25fps Trem: 0min 0mb A-V:0.000 [861:223] Pos: 30.0s 751f ( 0%) 25fps Trem: 0min 0mb A-V:0.000 [860:223] Flushing video frames Writing AVI index... Fixing AVI header... ODML: vprp aspect is 4:3. Video stream: 860.790 kbit/s (107598 bps) size: 3232268 bytes 30.040 secs 751 frames Audio stream: 224.000 kbit/s (27999 bps) size: 840411 bytes 30.015 secs v4l2: 754 frames successfully processed, 0 frames dropped. ---------------------------------------------------------------------- Piekne dziewczyny i samochody... >>> http://link.interia.pl/f188a

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SSA and mencoder
by Joshua Shriver 27 May '05

27 May '05

Is/are there any plans to support SSA in mencoder w/ respect to protocol and burning into video? Before I get flamed from ppl who are mkv and subtitle strong... I love mkv and various subtitles... and while I also like being able to load subtitles, etc... it's not always an option. Sometimes you do need to burn the subs into the video...and especially with SSA.. it's not just simple bottom of the screen subs... it's also karaoke, effects... and even more important things like being able put random text at various places. Ever seen an anime where you had an odd angle test to sub a newspaper or sign?.. Anyway... I love mencoder, but while it doesnt support SSA and since there isn't a SSA tool for Linux/(whatever unix) subbers are stuck w/ Windows which I find sad... since there isn't an equivalent tool. -Josh

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Re: [MEncoder-users] mpeg4 encoding problem
by Gerog Vits 27 May '05

27 May '05

Hello! Thank you for helping the clueless! I have noticed this with pre5, pre6 and pre7 all compiled from source. My current kernel is 2.6.6. I am using the following to capture: nice -n -10 \ mencoder tv:// -tv \ driver=v4l2:device=/dev/video0:normid=0:input=0:freq=$(channel "$1"):fps=25:width=720:height=576:alsa:adevice=hw.0,0 \ -oac mp3lame -lameopts cbr:br=128 \ -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=5000:keyint=125:mbd=2 \ -endpos $2:$3:00 -o "$4" \ 2>/mnt/archiv/tvrec/tvreclog.txt 1>/dev/null This is the playback & errout. I used -quiet, -speed, -nosound and -vo null to quickly get the output without watching the whole movie again. The error messages are the same as watching in the normal way. MPlayer 1.0pre7-3.3.2 (C) 2000-2005 MPlayer Team CPU: Intel Pentium 4/Xeon/Celeron Foster (Family: 8, Stepping: 9) Detected cache-line size is 64 bytes CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1 Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2 Playing /mnt/hd_dock/Cocktail für eine Leiche_2.avi. AVI file format detected. AVI: ODML: Building odml index (2 superindexchunks) AVI_NI: No audio stream found -> no sound. VIDEO: [FMP4] 720x576 24bpp 25.000 fps 5000.0 kbps (610.4 kbyte/s) Clip info: Software: MEncoder 1.0pre7-3.3.2 ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Selected video codec: [ffodivx] vfm:ffmpeg (FFmpeg MPEG-4) ========================================================================== Audio: no sound Starting playback... VDec: vo config request - 720 x 576 (preferred csp: Planar YV12) VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is 1.25:1 - prescaling to correct movie aspect. VO: [null] 720x576 => 720x576 Planar YV12 [mpeg4 @ 0x8699f00]ac-tex damaged at 35 11 [mpeg4 @ 0x8699f00]Error at MB: 541 [mpeg4 @ 0x8699f00]marker does not match f_code [mpeg4 @ 0x8699f00]marker does not match f_code .... repeated ~5000 times ... [mpeg4 @ 0x8699f00]marker does not match f_code [mpeg4 @ 0x8699f00]marker does not match f_code Marker bit missing before time_increment in video packed header Marker bit missing before vop_coding_type in video packed header [mpeg4 @ 0x8699f00]Error, video packet header damaged (f_code=0) [mpeg4 @ 0x8699f00]concealing 1180 DC, 1180 AC, 1180 MV errors Exiting... (End of file) Do you need some other information? best regards, gmv ___________________________________________________________ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

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Problem re-encoding matroska xvid+ac3 file
by Maciej J. Woloszyk 27 May '05

27 May '05

Hi, I've been using mencoder for quite some time without any significant problems. However lately I've been downloading some anime files some of which are contained in matroska files. As my standalone DVD player does not support matroska I need to re-encode it to standard avi (hardcoding subs). Problem is the input files seems to be vop packed xvid's with ac3 audio and mencoder can't reencode them properly - I get some horrible A/V desync whatever I try. And when I try to use just stream copy to transfer both audio and video streams into avi container using: mencoder -oac copy -ovc copy -o output.avi input.mkv It starts fine and after some 5000 frames I get the message "Too many audio packets in the buffer" and it stops and effecting 3 minutes of the output file is broken - it has A/V desync and some compression artifacts. Is there any way to make it re-encode correctly? I don't understend why mplayer can play the input file perfectly fine and mencoder can't re-encode it. Is there some difference in code used by mplayer and mencoder? Shouldn't both programs use the same mechanisms? Thanks in advance for any help, M. PS. I've been trying to solve this problem for a few days so I already tried simple soultions I could think about - none of them worked. Even using Windows VirtualDub solves problem only partially - 5 of 12 files can then be re-encoded correctly. -- Maciej J. Woloszyk, <mat(a)esi.com.pl> tel. +48 501 033 410 "All power corrupts, absolute power... JID:mat@esi.com.pl ...is even more fun"

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mpeg4 encoding problem
by Gerog Vits 27 May '05

27 May '05

Hello! I am capturing from tv with mpeg4 and I have noticed that all files produce error messages on the console during playback with mplayer. The error is "marker does not match f_code" and is printed several thousand times! Occassionally, I can see some parts in the picture that are "running out of shape" during playback. Has anyone similar expiriences? gmv ___________________________________________________________ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

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using acidrip+mencoder to rip dvd
by Roger D. Vargas 27 May '05

27 May '05

I have copied several DVD discs to my HD (the audio and video folders). I want to rip themto divx movies, but when i check the resulting video, it has very low quality (pixelated). Is there some way to improve the resulting video? Some extra parameters I should pas? -- Roger D. Vargas http://dsgp.blogspot.com * No hay nada tan importante que no pueda ser olvidado * Alzheimer

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Switch from DIVX to FMP4?
by Jason Bodnar 26 May '05

26 May '05

Hi, I wrote a script to encode some clips. One batch I did with 1.0pre6 and the video is detected as DIVX: VIDEO: [DIVX] 480x360 24bpp 23.976 fps 1017.4 kbps (124.2 kbyte/s) Using the same script but after upgrading to 1.0pre7 the video is now detected as FMP4: VIDEO: [FMP4] 480x360 24bpp 23.976 fps 1023.1 kbps (124.9 kbyte/s) So did something change between pre6 and pre7 with regard to -lavcopts vcodec=mpeg4? If so, what options do I need to speficy to get the DIVX encode with libavcodec? -- Jason Bodnar jason(a)shakabuku.org http://www.shakabuku.org "You want free speech? Let's see you acknowledge a man whose words make your blood boil who is standing center stage advocating at the top of his lungs that which you would spend a lifetime opposing at the top of yours." -- President Andrew Shephard, "The American President"

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