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

MPEG4 (Simple Profile)
by George Dunlap 22 Mar '06

22 Mar '06

My wife recently bought an Epson P2000, a portable storage device for copying pictures from a digital camera memory card and being able to view them. We discovered that an as an added bonus, it can play movies. However, getting a movie format it can play is turning out to be somewhat of a challenge. It basically supports two codecs: "MPEG-4 (Simple Profile)" and "Motion JPEG". I managed to get mencoder to successfully make an mjpeg file, but it seems like it's not a really good compression ratio. So I'm wondering: can I pass mencoder something that will make it use only the "simple profile" features of mpeg4? Can anyone give me any leads? -George

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audio delay
by Uzu Maki 22 Mar '06

22 Mar '06

nice -n 3 mencoder -oac copy -delay -1 -ovc copy delayed.avi -o "remuxed.avi" doesn't work... but it was worth the shot... is there another way to correct audio delay ? I tired to > in .wav, cut and re encode in mp3 but it doesn't work either... I get a progressive delay throughout the movie... thanx for your help! (of course I can just watch it with the -delay option but... it's for my non-linux-user niece...) cheers

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CPU-friendly-est "audio only" hack?
by Walter Belhaven 21 Mar '06

21 Mar '06

Hi, I realize that mencoder isn't set up to transcode "audio only", as discussed in the documentation. The TOOLS/aconvert script referenced in the docs makes use of a cute "-rawvideo on" trick to supply video, but it appears that option is no longer supported as of the CVS build I did a couple of days ago: MEncoder dev-CVS-060318-12:35-3.4.4 (C) 2000-2006 MPlayer Team CPU: Intel Pentium 4/Celeron 4 Northwood; Pentium 4 EE/Xeon \ Prestonia,Gallatin (Family: 15, Stepping: 9) CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1 Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2 Option rawvideo: Unknown suboption on I assume the purpose of that option from antiquity is to generate, very efficiently, a constant stream of video frames while mencoder merrily transcodes audio. What is the most "CPU friendly" way in the modern era to do likewise? Reading video from a file is undesirable, as the audio trancoding process is already, for me, an I/O bound operation. Thoughts? WB __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Do RAM memory timings matter ?
by dusty0＠freemail.gr 20 Mar '06

20 Mar '06

Do RAM memory timings matter when encoding or even decoding video ? I use 2GB(2x1GB) of RAM 2.5-4-4-8 and I was wondering if it is better to have 2x1GB 3-3-3-8 timings.. I am on AMD64 X2 (running both 32bit and 64bit Linux) and I wan't to take the 100% of my system ;-)

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vrc_maxrate and vbitrate
by Sergio 18 Mar '06

18 Mar '06

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all: I'm using Mencoder to create video DVDs, and have a litle quetion: vbitrate sets the average video bit rate. But how can I set the maximum video bit rate when coding? Is vrc_maxrate? I ask this because I tried to create a DVD with vbitrate 5000 and vrc_maxrate 7500, and when I use "mplayer -identify" with that DVD it returns a video bit rate of 7500 instead of 5000 :? Thanks in advance. - -- Nos leemos RASTER (Linux user #228804) raster(a)rastersoft.com http://www.rastersoft.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFEHEJ3XEZvyfy1ha8RAnqfAKCsIrEtgiO7ceG4NzXER8M/VqKH+wCgxMuF WPafD1H0+PO83V3H7rfRH8A= =wLXA -----END PGP SIGNATURE-----

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Subtitle-woes
by Hynek Schlawack 18 Mar '06

18 Mar '06

Hi, I've ripped a vob from a DVD using `mplayer dvd://1 -dumpstream -dumpfile X.vob' This vob contains subtitles (yes I'm sure, I can watch them using `-sid nr') I really need, so I'd like to dump them. If I understand the docs right, the option of choice for this task is `-dumpsub'. Unfortunately, the result is not very satisfying: ,----[ $ mplayer X.vob -dumpsub ] | MPlayer dev-CVS-060316-17:53-4.1.0 (C) 2000-2006 MPlayer Team | CPU: Advanced Micro Devices Sempron/Athlon MP/XP/XP-M Barton,Thorton (Family: 6, Stepping: 0) | CPUflags: MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0 | Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE | | | Playing X.vob. | MPEG-PS file format detected. | demux: File doesn't contain the selected audio or video stream. | Core dumped ;) | | Exiting... (End of file) `---- Also, while `-sid nr' works fine, `-vobsubid nr' doesn't work at all. Any hints what I'm doing wrong? -hs

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Hardcoding .sub subtitles into movie
by Phil Payne 17 Mar '06

17 Mar '06

Hi, I have an avi with .sub subtitles. Is there anyway to re-encode the avi to hard-code the subtitles into the movie stream e.g. so I can watch it on a rather low-featured external divx player? If I include -sub on the mencoder commandline this have worked in the past with .srt format subtitles but does not work with .sub Thanks, Phil.

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vhs camera
by Heather Buch 17 Mar '06

17 Mar '06

Hello, I hope this is the right list for this question: I am inheriting a VHS camera. I would like to somehow be able to connect this camera (not VHS tapes, but the camera itself with the little tape that goes inside it), and transfer my recordings to something that I can watch on my computer. I'm actually not even sure what file type it would be, perhaps AVI? My system is Fedora 4 with this kernel: 2.6.15-1.1833_FC4. I don't have a television, and I don't have MS Windows. Could someone please advise me on what hardware and software I might use? I've heard of the Hauppage WinTV USB thing, but am not sure if that works with Linux. If this is the wrong list, could someone recommend another list? Thanks in advance for any help you can give. Heather Buch --------------------------------- Yahoo! Mail Use Photomail to share photos without annoying attachments.

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Trouble transcoding 1080i "video" to NTSC DVD
by Walter Belhaven 15 Mar '06

15 Mar '06

Hi, I'm having trouble transcoding 1080i HD "video" (interlaced) content from my Tivo HR10-250 to "standard" NTSC DVD. The video source is a live hockey game. The goal (heh-heh) is to burn a DVD-R that will play on a "standard" set top DVD player. After reading, re-reading, ad nauseum, the mencoder manual, I'm getting close, but I'm not quite there yet. With scale:w:h:1, ildct, and ilme, I've been able to preserve the "video" appearance of the original and get very smooth motion on the transcoded output. That's the good news. But I still can't get past the following two problems: 1. The original HD source changes field-order every period! The 1st and 3rd periods are Bottom-field first, and the 2nd period and post-game wrap-up are Top-field first. This is according to DGIndex on the original .ty file, and it's absolutely the case that the transcoded video goes from sweetness in the 1st and 3rd periods, to an unwatchable mess in the 2nd. I've tried all possible permutations of the 'phase' filter to fix the field order, but none of them seem to work. Perhaps I've got the filter in the wrong place in the pipeline though (see example below). 2. I still get freezes and stutters in my two set-top players, a Panasonic and a Sony, even though the DVD-RW plays fine in the computer. Note: every DVD-R/RW I've burned with this same burner, on source that was derived from a "real" DVD via DVD Decrypter/Shrink has played perfectly, with no freezes nor stutters, on those same set-top players. Therefore, I suspect there's something wrong with my transcoded MPEG file, as opposed to there being a "media" problem. Item 1, while annoying, I can work around by splitting the original into several files and transcoding them separately, manually reversing the field order when necessary. Item 2, though, is a show-stopper. Can anyone offer any hints, tips, or tricks on how to fix this? Here's the most promising command line I've devised to date. Note that I haven't bothered with any of the "high quality" transcoding switches while in this "debug" phase; i.e., I just want something that works, and the video quality is quite excellent even in this "low quality" mode ... when it's not freezing, of course: mencoder -delay 0.3 -oac copy -ovc lavc -of mpeg -mpegopts \ format=dvd -vf phase,crop=1264:1072,scale=720:480:1,harddup \ -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9696: \ vbitrate=5731:keyint=18:aspect=16/9:ildct:ilme \ -ofps 30000/1001 -o output.mpg input.mpg Thanks for any and all help, and thanks to the authors of these amazing programs. Cheers, WB __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Convertion from AVI[mjpeg+pcm] to DVD[mpeg2video+mp] fails with clicking sound problem
by Mojo 15 Mar '06

15 Mar '06

Hi, I capture TV in avi [mjpeg+pcm] and then recode it following the mplayer manual into dvd format mpeg2+mp2. The output file has very strange sound problems - it has clicks twice a second (both mp2 and ac3 codecs). Gentoo, MPlayer dev-CVS-060302-17:36-3.3.5 **** Capture script: mencoder -mc 0 -noskip -tv driver=v4l2:input=3:width=720:height=576:device=/dev/v4l/video0:\ normid=0:buffersize=500:fps=25:\ :saturation=40:amode=0:alsa:audiorate=48000:adevice=hw.0 \ -oac pcm \ tv:// \ -o tvcapture.avi -ovc lavc -lavcopts vcodec=mjpeg:vhq:aspect=4/3:vbitrate=50000:vqscale=1 \ -vf harddup,crop=680:560:25:8,pp=lb **** Avi -> Dvd script mencoder -mc 0 -noskip -of mpeg -vf scale=720:576,harddup -srate 48000 -ofps 25 \ -ovc lavc -oac lavc -lavcopts vcodec=mpeg2video:\ vrc_buf_size=1835:\ keyint=15:\ vrc_maxrate=6000:\ vbitrate=4000:\ aspect=4/3:\ acodec=mp2:abitrate=48 \ $1 -o $2 Thanks for any clue. PS: I can upload video and sound files if it is needed

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