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

[ods15: Re: [MEncoder-users] Correct order for denoise filter]
by Oded Shimon 22 Apr '05

22 Apr '05

On Thu, Apr 21, 2005 at 03:10:12PM +0400, Oleynik Phil wrote: > Jean Hoderd wrote: > >Also, I was looking for a more detailed explanation > >of the meaning of hqdn3d parameters. MPlayer's manual > >is terse at best... Can someone point me to a reference? > > If you are shrinking movie down - then after. If you enlarge it - then > put it before. > Parameters are not clearly defined, try and see method is the best here. The parameters are explained just fine. There's the luma blur, which is a brightness kind of blur (you need to understand YUV for this) and there's a chroma blur which blurs only the colors. The temporal strength I believe is blur over time. - ods15

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Fwd: Has the bug (mencoder -mc 0 -noskip has memory leak for 5.1 audio stream) fixed?
by Bo Xie 21 Apr '05

21 Apr '05

Sorry, I should post it here instead of mplayer-user maillist. Best Regards, Xie Bo ---------- Forwarded message ---------- From: Bo Xie <xiebopublic(a)gmail.com> Date: Apr 18, 2005 11:33 PM Subject: Has the bug (mencoder -mc 0 -noskip has memory leak for 5.1 audio stream) fixed? To: MPlayer-users(a)mplayerhq.hu Hi, I have met the same bug(with latest cvs source code) described by following poster in this maillist one year ago, and want to make sure whether anyone has any idea about it? ---------------- On Fri, 2004-03-05 at 10:47, Wayde Milas wrote: > I've read the bug submitting howto and I'm trying my best to submit a > well informed bug. > > The full dump is attached as a txt file. I am using the cvs versions of > ffmpeg and mplayer as of 3/4/04 > > Observations: > > 1) If I do -nosound the bug does not appear. > 2) The bug does not appear if the audio stream is 2.0. It only seems to > manifest on a 5.1 stream. > 3) I've used multiple DVD's. It crops up at the same place (secondwise) > no matter what dvd I use. > 4) I've tried various codec options. Something as simple as: > mencoder dvd://1 -o Starwars2.avi -mc 0 -noskip -skiplimit 0 -oac copy > -ovc lavc -vf crop=720:362:0:58 -lavcopts vcodec=mpeg4:vqscale=2 > still exhibits the behavior. > > I'd be glad to expand on the bug report. Just tell me what info you > need. > > Wayde > > I've compiled mplayer on a pent4 box and a amd athlon xp box and they both exhiobit this same behavior. anyone have a clue as to what happening? Wayde ---------------- When I use "mencoder -mc 0 -noskip dvd://1 -of mpeg -oac copy -ovc copy -tt xxx -endpos xxx ...", several seconds(e.g.300 seconds) later mencoder tell me "too many audio packages in buffer..." and exit. When mencoder is encoding, it eats memory more and more and doesn't release it properly. I mean when I change (demuxer.h) #define MAX_PACKS 4096 to 409600 and #define MAX_PACK_BYTES 0x800000 to 0x80000000 , it will never pop up "too many audio packages in buffer..." message but it has eaten up more than 1GB memory for encoding 50 minutes DVD!!! Then I'm sure there is memory leak for mencoder -mc 0 -noskip to dealing with 5.1 audio stream. (Maybe you will suggest me to use mplayer -dumpstream, but I want to use mencoder -ss and -endpos feature.) Looking forward to your reply and thanks! Best Regards, Xie Bo

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Correct order for denoise filter
by Jean Hoderd 21 Apr '05

21 Apr '05

Hi, I was wondering what is the correct order for placing a denoise filter such as hqdn3d: should it be before or after scaling? This: -vf crop=680:552:22:12,scale=512:384,hqdn3d Versus this: -vf crop=680:552:22:12,hqdn3d,scale=512:384 Also, I was looking for a more detailed explanation of the meaning of hqdn3d parameters. MPlayer's manual is terse at best... Can someone point me to a reference? (My googling came back empty-handed) Thanks in advance for your time! Cheers, Jean __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Re: [MEncoder-users] High quality encoding of anime
by Jean Hoderd 20 Apr '05

20 Apr '05

> > And the reason the quality is so bad is because he's failing to > inverse-telecine it (which may not be possible if it was converted > NTSC->PAL in some of the usual ways..) > > Rich > Hi everybody, Thanks for letting me now about this "particularity" of Anime PAL DVDs. I have read the docs in www.animemusicvideos.org and I think I understood its contents. Unfortunately, its seems that my DVDs have suffered from this crappy conversion, and I reckon they are so messed up it is impossible to "unmess" them. I feel robbed. Still, this leaves me with a couple of questions which I hope someone will be kind enough to answer: 1) Is one better off buying NTSC DVDs for Anime? What about american animation such as the Simpsons, or even non-animated american TV series? 2) Is there any website that keeps track of these crappy DVD releases? As a consumer, I would like to know. 3) Since the originals are 24fps, why are not the PAL releases just slightly "sped up" versions of the original, like with cinema? Is this an example of greedy and clueless publishers? Thanks in advance for your help, Jean __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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High bitrates in ffmpeg and mencoder
by Luke 20 Apr '05

20 Apr '05

Hi, I would like to create MPEG-2 files of a very high bitrate 20Mbit/s and 50Mbit/s. Is it possible with mencoder or ffmpeg??? Thanks, Luke

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Re: [MEncoder-users] High quality encoding of anime
by Jean Hoderd 19 Apr '05

19 Apr '05

> > I would second that emphatically. Don't scale at all and > you will get much better results. > Hi, I scaled down because I noticed block artifacts in the unscaled version. As a matter of fact, I still notice some blocks even at 640x480. Perhaps I am doing something very wrong with my lavc and xvid options, in which case your help would be appreciated. Or does scaling down introduce other kind of artifacts? Cheers, Jean __________________________________ Yahoo! Mail Mobile Take Yahoo! Mail with you! Check email on your mobile phone. http://mobile.yahoo.com/learn/mail

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Re: [MEncoder-users] High quality encoding of anime
by Jean Hoderd 19 Apr '05

19 Apr '05

> this is what my lavc options looks like: > > qns=3:cmp=2:subcmp=6:preme=2:predia=3:dia=3:last_pred=3:vmax_b_frames=1:mv0:cbp:qprd:trell:preme=2:keyint=300:v4mv:mbd=2:vqcomp=0.7 > Thanks! I will try adding vqcomp=0.7 like you suggested. I notice that most artifacts I get are in the high-motion scenes, and if I understand vqcomp correctly, increasing its value from the default 0.5 should help with those scenes. However, I also noticed that with lavc, the only way for B-frames to be handled correctly is to add vb_strategy=1 (and vmax_b_frames=2, otherwise it won't use B-frames at all). Have you considered this? XviD does not seem to have any problems using B-frames correctly, ie, avoiding them in high-motion scenes. > also, you should try to use vqscale (vbr) instead of vbitrate (cbr), > it's harder to estimate filesize, but it looks much better. From what > I've seen lavc gives much better quality than xvid. Could you elaborate further on this, please? You mean that for the first pass it is better to use vqscale, and vbitrate only for the second pass? I am following the instructions from Mplayer's docs, but they seem a bit out of date, alas. Thanks in advance! Jean __________________________________ Do you Yahoo!? Plan great trips with Yahoo! Travel: Now over 17,000 guides! http://travel.yahoo.com/p-travelguide

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Re: [MEncoder-users] High quality encoding of anime
by Jean Hoderd 19 Apr '05

19 Apr '05

> > Anime is never interlaced, always telecined. If your PAL discs show > combing, they might have been framerate-converted from NTSC rather > than remastered, meaning basically they suck. Just download your > "backups" instead. > I used the -vf pp=lb option because without it the video appears "combed" in high-motion scenes. Since this is a deinterlace filter, I assumed that the original video was interlaced. (It looks fine after the -vf pp=lb) As for downloading it, it would be a waste of time because I have the originals. I just want to back them up into DVD+R, plus convert them into MPEG-4 AVI files which my hardware player (a KiSS DP1000) can read. And yes, on a daily basis I would rather have the backups lying around than the originals: do you have any idea how kids handle DVDs? Scary... Any further comments on the lavc or XviD options? Cheers, Jean __________________________________ Do you Yahoo!? Plan great trips with Yahoo! Travel: Now over 17,000 guides! http://travel.yahoo.com/p-travelguide

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Re: [MEncoder-users] High quality encoding of anime
by Jean Hoderd 19 Apr '05

19 Apr '05

> > No you don't. You have bad PAL conversions of the originals. The > copies you will download will be far better than anything you can ever > make yourself from the PAL DVDs. > Hi, Thanks for your concern. Is there any way I can find out whether my DVDs are really of this crap variety you mention? (Preferably with mplayer) Cheers, Jean __________________________________ Do you Yahoo!? Plan great trips with Yahoo! Travel: Now over 17,000 guides! http://travel.yahoo.com/p-travelguide

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High quality encoding of anime
by Jean Hoderd 19 Apr '05

19 Apr '05

Hi all, I am backing up part of my anime collection, and therefore I am looking for good quality settings. The video bitrate available after the audio coding is around 1720 kbps, and I was thinking of using a 640x480 resolution based on the recommendations of the calcbpp.pl script. (The video is PAL, interlaced, 25fps, and 4/3 aspect ratio). I have a *very* fast PC which is always on, so encoding time is not an issue. I have read plenty of forums and threads on this mailing list concerning best quality options for lavc and XviD, but sometimes too much information can confuse rather than enlighten, if you know what I mean... Anyway, my questions are very direct: - lavc or XviD for anime at high bitrates? - for lavc, is qprd safe to use? - what parameters to use for hqdn3d filter? - what is the current consensus about B-frames? Here are the options I currently use for the second-pass: (I am using two-pass encoding, obviously) Pre-processing: -zoom -sws 9 -vf pp=lb,crop=688:560:18:8,hqdn3d=2:1:2,scale=640:480 For lavc: vcodec=mpeg4:vbitrate=1720:vpass=2: vmax_b_frames=2:vb_strategy=1: vme=4:preme=2:predia=4:dia=4:last_pred=3: precmp=10:cmp=10:subcmp=10:mbcmp=10: mbd=2:v4mv:cbp:mv0:qprd:trell:qns=3 For XviD: bitrate=1720:pass=2: packed:max_bframes=2: vhq=4:me_quality=6: quant_type=h263: cartoon:trellis: chroma_me:chroma_opt Thanks in advance for any help you can give me! My backups will be eternally grateful... Cheers, Jean __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/

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