|
pc
newsgroups
|
|||||||||||||||||||||||
|
|||||||||||||||||||||||
Deflicker MPEG-2 video?
flickers a lot. (Captured from an old VHS tape made with a poor old analog camcorder.) I am wondering about possibilities to take out the flicker. I know of Avisynth and VirtualDub filters that reduce flicker, such as the one by Donald Graft, another from MSU, etc. but those work in programs that convert the video to AVI. Virtualdubmod can accept MPEG2 video as input, but it will not output it. I have a few programs that work with MPEG-2 video, including Ulead Video Studio, and TMpgenc Plus. But I have not seen any filters in those programs (please correct me if I missed something) that can improve a flicker problem. Are there any programs that work with MPEG-2 video that can do this? (Video Studio has brightness and sharpness filters, and special effects, but I don't recall anything like deflicker.) I guess it would be possible to convert the MPEG-2 video to AVI with Virtualdubmod, using deflicker filters, then import that avi into Video Studio to convert it back to MPEG-2. That would be very time-consuming, and assuming one used some kind of compression in creating the AVI (to create it uncompressed would require an incredible amount of space, which I don't have), would involve multiple recompressions into different formats, which is not good for the video. I would prefer to keep it encoded as is, as it is already in DVD-compatible format, but improve the flicker problem. Any suggestions? MS wrote:
> I have MPEG-2 video that I will burn to DVD. However, that MPEG-2 video Open the video in VirtualDub-MPEG2 (or VirtualDubMod I believe), load> flickers a lot. (Captured from an old VHS tape made with a poor old analog > camcorder.) I am wondering about possibilities to take out the flicker. > > I know of Avisynth and VirtualDub filters that reduce flicker, such as the > one by Donald Graft, another from MSU, etc. but those work in programs that > convert the video to AVI. Virtualdubmod can accept MPEG2 video as input, but > it will not output it. the anti-flicker filter, frameserve to your MPEG2 encoder of choice, such as TMPGEnc. No intermediate steps or temporary files. http://www.videohelp.com/virtualdubframeserve.htm -- -WD
Show quote
Hide quote
On Fri, 22 Jul 2005 10:18:57 -0700, "MS" <ms@nospam.com> wrote: No matter what you do, you'll have to re-encode. The most>I have MPEG-2 video that I will burn to DVD. However, that MPEG-2 video >flickers a lot. (Captured from an old VHS tape made with a poor old analog >camcorder.) I am wondering about possibilities to take out the flicker. > >I know of Avisynth and VirtualDub filters that reduce flicker, such as the >one by Donald Graft, another from MSU, etc. but those work in programs that >convert the video to AVI. Virtualdubmod can accept MPEG2 video as input, but >it will not output it. > >I have a few programs that work with MPEG-2 video, including Ulead Video >Studio, and TMpgenc Plus. But I have not seen any filters in those programs >(please correct me if I missed something) that can improve a flicker >problem. Are there any programs that work with MPEG-2 video that can do >this? (Video Studio has brightness and sharpness filters, and special >effects, but I don't recall anything like deflicker.) > >I guess it would be possible to convert the MPEG-2 video to AVI with >Virtualdubmod, using deflicker filters, then import that avi into Video >Studio to convert it back to MPEG-2. That would be very time-consuming, and >assuming one used some kind of compression in creating the AVI (to create it >uncompressed would require an incredible amount of space, which I don't >have), would involve multiple recompressions into different formats, which >is not good for the video. I would prefer to keep it encoded as is, as it is >already in DVD-compatible format, but improve the flicker problem. > >Any suggestions? > space-efficient way to do that is: Open MPEG-2 in DGIndex --> output D2V; Write AVS to open D2V --> load in VirtualDubMod So far what you've got is a way to open your MPEG-2 file in VDubMod without any huge intermediate files, or the huge-ass wait VDubMod adds when opening MPEG files. Edit AVS (put in filters/functions/scripts) --> preview in VDubMod When your script looks how you like it (e.g. your scripted video looks flicker-free in VDubMod), then: Load AVS in CCE or TMPGEnc --> MPEG-2 This will get you from MPEG-2 to MPEG-2 with no intermediate AVI files, and (depending on your filters) one conversion from YV12 to RGB (which is what CCE likes, as I recall) and one conversion/compression from RGB back to YV12 (DVD-spec MPEG-2 is 4:2:0 YV12). It's still unclear exactly what sort of flicker you're talking about, but I don't need to know that in order to be pretty confident you won't find a better route than what I've laid out. This is what all the cool kids are doing, anyway... Thank you, Karyudo and Will.
In the page at Videohelp that Will cited, a similar procedure is recommended, however it involves using Vdubmod itself to frameserve the video, rather than DGIndex. In that case one adds the filters, etc., before doing the frameserving. http://www.videohelp.com/virtualdubframeserve.htm (page Will cited) You suggest doing the frameserving first with DGindex to d2v, create an AVS that opens the d2v, then open and edit the .AVS in VDub (or vdubmod), then open with the MPEG=2 encoder. I think I missed a step though. You say open the .AVS in TMPGENC or other MPEG-2 encoder. But the .AVS file was created in this case before vdub, before the anti-flicker filter. After opening the .AVS file in VDUB(MOD) and applying the filters, etc., how do you save it in vdub(mod), so that it can be opened by the MPEG-2 encoder? Will Vdub save the .AVS, with its filters added, rather than an .AVI? Or do you frameserve again with VDub after applying the filter(s), which would mean frameserving twice? To make my question simpler--using the procedure you outline below, after editing, adding filters, etc. in vdub(mod), how do you save it in vdub(mod) with the edits, for the MPEG-2 encoder to open? Do you think that procedure will get better results than the one outlined in the videohelp article? I'm surprised that none of the MPEG-2 programs (that I've seen, at least) have some sort of anti-flicker filter themselves. You also wrote: > "It's still unclear exactly what sort of flicker you're talking Well, of course, without you seeing the video, I wouldn't know how toabout,...." describe it to you. But if you have any suggestions regarding using anti-flicker filters, good settings to try, etc., that could be helpful. I have experimented with them a little before, but never really knew how to set the settings, just experimented a little, etc. I find one problem with them is that they can cause a washed-out effect, excessive brightness, at certain points in a video . (Only at certain places, so one wouldn't want to compensate by reducing brightness on the whole video.) Have you had experience with the different Vdub deflicker filters? I have tried two, the Donald Graft Deflick filter, and one called MSU Deflicker (from Russia). I found the latter easier to use, as it does not require the lengthy two-pass processing of the Graft Deflick filter. But I didn't really know how to set the settings on either. If you can clarify anything about how to use deflicker filters, that would be great! Thanks again to both repliers! :-) Show quoteHide quote "Karyudo" <karyudo_use***@yahoo.com.remove.me> wrote in message news:d2q5e1lfvac5nmhjrdpd08qk4qhrshvt9i@4ax.com... > On Fri, 22 Jul 2005 10:18:57 -0700, "MS" <ms@nospam.com> wrote: > > >I have MPEG-2 video that I will burn to DVD. However, that MPEG-2 video > >flickers a lot. (Captured from an old VHS tape made with a poor old analog > >camcorder.) I am wondering about possibilities to take out the flicker. > > > >I know of Avisynth and VirtualDub filters that reduce flicker, such as the > >one by Donald Graft, another from MSU, etc. but those work in programs that > >convert the video to AVI. Virtualdubmod can accept MPEG2 video as input, but > >it will not output it. > > > >I have a few programs that work with MPEG-2 video, including Ulead Video > >Studio, and TMpgenc Plus. But I have not seen any filters in those programs > >(please correct me if I missed something) that can improve a flicker > >problem. Are there any programs that work with MPEG-2 video that can do > >this? (Video Studio has brightness and sharpness filters, and special > >effects, but I don't recall anything like deflicker.) > > > >I guess it would be possible to convert the MPEG-2 video to AVI with > >Virtualdubmod, using deflicker filters, then import that avi into Video > >Studio to convert it back to MPEG-2. That would be very time-consuming, and > >assuming one used some kind of compression in creating the AVI (to create it > >uncompressed would require an incredible amount of space, which I don't > >have), would involve multiple recompressions into different formats, which > >is not good for the video. I would prefer to keep it encoded as is, as it is > >already in DVD-compatible format, but improve the flicker problem. > > > >Any suggestions? > > > > No matter what you do, you'll have to re-encode. The most > space-efficient way to do that is: > > Open MPEG-2 in DGIndex --> output D2V; > Write AVS to open D2V --> load in VirtualDubMod > > So far what you've got is a way to open your MPEG-2 file in VDubMod > without any huge intermediate files, or the huge-ass wait VDubMod adds > when opening MPEG files. > > Edit AVS (put in filters/functions/scripts) --> preview in VDubMod > > When your script looks how you like it (e.g. your scripted video looks > flicker-free in VDubMod), then: > > Load AVS in CCE or TMPGEnc --> MPEG-2 > > This will get you from MPEG-2 to MPEG-2 with no intermediate AVI > files, and (depending on your filters) one conversion from YV12 to RGB > (which is what CCE likes, as I recall) and one conversion/compression > from RGB back to YV12 (DVD-spec MPEG-2 is 4:2:0 YV12). > > It's still unclear exactly what sort of flicker you're talking about, > but I don't need to know that in order to be pretty confident you > won't find a better route than what I've laid out. This is what all > the cool kids are doing, anyway...
Show quote
Hide quote
On Mon, 25 Jul 2005 17:00:36 -0700, "MS" <ms@nospam.com> wrote: I think you've missed one fundamental point--one that I didn't make>Thank you, Karyudo and Will. > >In the page at Videohelp that Will cited, a similar procedure is >recommended, however it involves using Vdubmod itself to frameserve the >video, rather than DGIndex. In that case one adds the filters, etc., before >doing the frameserving. > >http://www.videohelp.com/virtualdubframeserve.htm (page Will cited) > > >You suggest doing the frameserving first with DGindex to d2v, create an AVS >that opens the d2v, then open and edit the .AVS in VDub (or vdubmod), then >open with the MPEG=2 encoder. > >I think I missed a step though. You say open the .AVS in TMPGENC or other >MPEG-2 encoder. But the .AVS file was created in this case before vdub, >before the anti-flicker filter. After opening the .AVS file in VDUB(MOD) and >applying the filters, etc., how do you save it in vdub(mod), so that it can >be opened by the MPEG-2 encoder? Will Vdub save the .AVS, with its filters >added, rather than an .AVI? Or do you frameserve again with VDub after >applying the filter(s), which would mean frameserving twice? > >To make my question simpler--using the procedure you outline below, after >editing, adding filters, etc. in vdub(mod), how do you save it in vdub(mod) >with the edits, for the MPEG-2 encoder to open? explicit--and that is that AviSynth (.avs) more or less takes the place of VDubMod's filters, and at the same time is quite a bit more powerful and flexible. In my scenario, all you're using VDubMod for is to preview the changes you're making in your AviSynth script. Your anti-flicker filter will be a line (or several lines) in your AviSynth script, rather than a filter that must be loaded each time in VDubMod. AviSynth is a more robust workflow than VDubMod because you are writing a script into which you can pile all kinds of stuff. You can open more than one file, you can overlay this, use that as a mask, animate something else. And you can rearrange filters or functions pretty much at will. Sort of like it's a command-line version of VDubMod, but on steroids. Once your AVS script is looking how you like it, then you can open it directly in the encoder, and AviSynth will get the frames directly from the VOB (via DGIndex), and serve them to the encoder. I don't believe there's any shorter path, other than opening an AVI file directly. Clearly, if the encoder can open the AVS directly, there's no need for the overhead of VDubMod's frameserving (and possible colourspace conversions). DGIndex takes a bit of time to work its magic, but what it does is create a very small index file (.d2v) and the demuxed audio files (.ac3, typically) that you can then drop into an AviSynth script. This index file only needs to be written once. As far as I know, if you close and re-open an MPEG file in VDubMod, you have to wait for it to be parsed all over again each time. Which I figure is a pain. >Do you think that procedure will get better results than the one outlined in Yes! If only because it is somewhat more flexible. For more info on>the videohelp article? AviSynth, check Doom9.org's forums. You can also check the official AviSynth Wiki at avisynth.org, which includes a download link and quite a detailed manual for all the built-in functions. I think if you take a look, you'll see that AviSynth is kind of on the next level up from something like VDubMod when it comes to the actual processing of stuff. Once you get your AVS opened in VDubMod, be sure to use VDubMod's very handy AviSynth script editor, which you'll find under Tools|Script Editor (or CTRL+E). Using that, it's a one-button step to save and reload and jump back to the frame you were looking at. You would not believe how long it took me to find this incredibly useful feature... Thanks again, Karyudo!
"Karyudo" <karyudo_use***@yahoo.com.remove.me> wrote in message No, I didn't get that before. So, in your procedure Vdub(mod) really doesn'tnews:fanbe1dfl5panckmujdaejs81na6g1tups@4ax.com... > I think you've missed one fundamental point--one that I didn't make > explicit--and that is that AviSynth (.avs) more or less takes the > place of VDubMod's filters, and at the same time is quite a bit more > powerful and flexible. In my scenario, all you're using VDubMod for is > to preview the changes you're making in your AviSynth script. Your > anti-flicker filter will be a line (or several lines) in your AviSynth > script, rather than a filter that must be loaded each time in VDubMod. do anything, except if one uses its script editor. In using vdub(mod) as a preview, I find that it doesn't really play back videos well at all. But I guess one might use it to get some idea, before going through with the actual lengthy encoding. ( I put "mod" in parentheses, because in your procedure, it could just as well be plain vdub (which has later versions than the "mod" variation), as unlike the other procedure, it would only be opening an .AVS file, not an .mpeg-2 file.) Will TMPGENC open an .AVS file? Your procedure sounds more difficult to do, especially since I'm not so familiar with AviSynth, but I guess I could read up more on it. Of course I could not use one of the deflicker filters I mentioned, as they are vdub filters. I have seen one avisynth deflicker filter also, although I have never tried it. (Also written by a Russian, but not MSU.) Have you used that filter? What would be good settings to try with it? I'll have to see if I will have enough time to do your procedure, which would involve more study, learning more about AviSynth, etc., take more of my time. But you might be right about it getting better results. I'll see how my time shapes up. (As far as the mpeg-2 file having to be re-parsed each time vdubmod opens it, that's true, but wouldn't it only have to be opened onceby VDM, if one followed the other procedure?) Thanks again! :-) Show quoteHide quote > > AviSynth is a more robust workflow than VDubMod because you are > writing a script into which you can pile all kinds of stuff. You can > open more than one file, you can overlay this, use that as a mask, > animate something else. And you can rearrange filters or functions > pretty much at will. Sort of like it's a command-line version of > VDubMod, but on steroids. > > Once your AVS script is looking how you like it, then you can open it > directly in the encoder, and AviSynth will get the frames directly > from the VOB (via DGIndex), and serve them to the encoder. I don't > believe there's any shorter path, other than opening an AVI file > directly. Clearly, if the encoder can open the AVS directly, there's > no need for the overhead of VDubMod's frameserving (and possible > colourspace conversions). > > DGIndex takes a bit of time to work its magic, but what it does is > create a very small index file (.d2v) and the demuxed audio files > (.ac3, typically) that you can then drop into an AviSynth script. This > index file only needs to be written once. As far as I know, if you > close and re-open an MPEG file in VDubMod, you have to wait for it to > be parsed all over again each time. Which I figure is a pain. > > >Do you think that procedure will get better results than the one outlined in > >the videohelp article? > > Yes! If only because it is somewhat more flexible. For more info on > AviSynth, check Doom9.org's forums. You can also check the official > AviSynth Wiki at avisynth.org, which includes a download link and > quite a detailed manual for all the built-in functions. I think if you > take a look, you'll see that AviSynth is kind of on the next level up > from something like VDubMod when it comes to the actual processing of > stuff. > > Once you get your AVS opened in VDubMod, be sure to use VDubMod's very > handy AviSynth script editor, which you'll find under Tools|Script > Editor (or CTRL+E). Using that, it's a one-button step to save and > reload and jump back to the frame you were looking at. You would not > believe how long it took me to find this incredibly useful feature... > > On Tue, 26 Jul 2005 01:14:11 -0700, "MS" <ms@nospam.com> wrote: Correctamundo. However, I don't believe VDub non mod has the nifty AVS>( I put "mod" in parentheses, because in your >procedure, it could just as well be plain vdub (which has later versions >than the "mod" variation), as unlike the other procedure, it would only be >opening an .AVS file, not an .mpeg-2 file.) editing feature built in, which for me is (now) essential. >Will TMPGENC open an .AVS file? Uhh... I've never tried it. CCE will...>Your procedure sounds more difficult to do True. But it's definitely more powerful, portable, and repeatable.>Of course I Ah, but AviSynth can open just about every VDub filter, too! Not quite>could not use one of the deflicker filters I mentioned, as they are vdub >filters. as easily, but it can be done. But, to answer your next couple of questions, no, I've never used it, so I have no idea about decent settings to try. >But you might be right about it getting better results. The end result might be the same in both cases, but I find the factthat I can save and close and do something else and then come back to pretty much *precisely* where I was is a strong point in favour of AviSynth. That, and I find it much easier to make small changes in filters, etc. >(As far as the mpeg-2 file having to be re-parsed each time vdubmod opens I'm confused as to which procedure you're talking about. With my AVS>it, that's true, but wouldn't it only have to be opened onceby VDM, if one >followed the other procedure?) strategy, once DGIndex is done, then you've basically got the loading speed of an AVI ever after. From bitter experience, that doesn't seem to be true when opening MPEG2 directly in VDubMod. >Thanks again! :-) You're welcome.Karyudo wrote:
Show quoteHide quote > Yes it will. If it doesn't you have to make some tweaks:> On Tue, 26 Jul 2005 01:14:11 -0700, "MS" <ms@nospam.com> wrote: > > >( I put "mod" in parentheses, because in your > >procedure, it could just as well be plain vdub (which has later versions > >than the "mod" variation), as unlike the other procedure, it would only be > >opening an .AVS file, not an .mpeg-2 file.) > > Correctamundo. However, I don't believe VDub non mod has the nifty AVS > editing feature built in, which for me is (now) essential. > > >Will TMPGENC open an .AVS file? > > Uhh... I've never tried it. CCE will... http://www.avisynth.org/Section+2%3A+AviSynth+and+frameserving#q2.4 Wilbert 
Other interesting topics
Risking crashes with MS Products; Alternatives
Shotgun microphone? Mono vs. Stereo betacam or digital? New tv makes high pitch "tinnitus like" sound Advice wanted on buying camcorder Cool Split Screen How to set date stamp on Sony TVR-340E Tolerancia Good place to buy camcorder! Divx encoding question |
|||||||||||||||||||||||
