Category Archives: handbrake deinterlace double frame rate

Handbrake deinterlace double frame rate

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Video Production Stack Exchange is a question and answer site for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation. It only takes a minute to sign up. I'm making the 3rd instalment of my Sand Wars series Sand Wars II and I shot the majority of my footage at 60p which I think means 60fps and progressive rather than interlaced.

I do not want to rotoscope lightsabers 60 frames per second and would much rather do The footage is currently at I know I can lower the frame rate using HandBrake, but I don't want to have to lose more quality than I already will, as each clip is probably going to be run through Blender a few times. What settings can I enable on HandBrake to take an entire folder of my footage I don't want to have to do this hundreds of times for each video file and output it into another folder with each video having a frame rate of 30 fps or Install ffmpeg from the packages found here.

These are all ready-built and should have all the included libraries you need. Once you've installed ffmpeg you will need to run it from the command line. Since there's different ways of doing that depending on your platform, the one safe bet is that if you drag the ffmpeg icon into the command line window you should get the path to the ffmpeg executable auto-filled for you.

Next you type out a command like this:. So to fill out the path to the input file, just drag it into the terminal. Since the output file doesn't exist, copy the input file and change the name and extension to whatever you want. But anyway…. The first example use h. Since you're not looking for small file sizes the preset is set to ultrafast and the audio codec -c:a is set to copy this is assuming you're using an mp4 as input so that the audio will not be re-encoded.

The second uses prores compression with the -profile:v 3 setting it to ProRes HQ, a very solid codec for editing work on Macs or Windows machines using Adobe Premiere. You could change this to Avid DNxHD or other codecs of your choice, with ffmpeg there are literally hundreds to choose from. In both examples I changed the video frame rate using -r 30this will drop input frames to output a constant 30fps. Since your input is I also used -r 60 before the -i input flag to force ffmpeg to treat the input file as 60fps although it doesn't add or remove frames, just changes the way they are interpreted.

You could instead change your output to Applying this to a whole folder of files involves using the shell.This article is for an older version of HandBrake.

All versions. Alle Versionen. Common frame rates are Modern video formats can be variable frame rate, switching between different frame rates on the fly, e. No frame rate conversion is performed.

handbrake deinterlace double frame rate

When used with Same as SourceHandBrake will detect the frame rate of your Source and make sure any variable portions are made constant at the same rate. When used with a specific frame rate, HandBrake conforms your entire video to the new frame rate.

This method is not recommended except in special circumstances, such as encoding for import into an NLE or for extremely old devices. Think of it as a threshold or limit.

HandBrake will leave portions of your video at or below the peak frame rate you select unchanged, while limiting higher frame rate video to the peak frame rate you select. HandBrake versions prior to 1.

This was not of a problem with most videos of the past, but the advent of high frame rate video recording for mobile devices, action cams, and more, this method cannot ensure such videos will be compatible with devices having considerable frame rate limitations—including nearly all modern media devices that do not create video. To remedy this, the built-in presets in HandBrake 1.Search everywhere only in this topic. Advanced Search. Classic List Threaded. Leo Izen. Objectively best deinterlacer?

Is there any filter which is objectively best at deinterlacing? Is there some kind of metric? Also, when deinterlacing a fully-interlaced video with -filter:v w3fdif, the filter doubles the framerate. Although I appreciate that FFmpeg is smart enough to realize that select outputs two streams and blend takes two as an input, so I don't have to futz with [v] stuff. Should I go about this with w3fdif?

Carl Eugen Hoyos. Re: Objectively best deinterlacer? And yes, a deinterlacer has to double the framerate for optimal results, an option to avoid that exists, please rtfm. Paul B Mahol.

In reply to this post by Leo Izen. Phil Rhodes. In reply to this post by Carl Eugen Hoyos. I've used Yadif with great success, including critical things like camera originals shot interlaced which were needed as progressive. I'm not sure what techniques it uses, but I suspect it uses some adaptive stuff to avoid blurring stationary objects.

I would say it is subjectively as good as some of the expensive boxes that do deinterlacing. In reply to this post by Paul B Mahol. I'll have to do more subjective tests. One thing I was never quite able to ascertain. James Darnley. Yadif in ffmpeg supports 8, 9, 10, 12, 14 and 16 bit samples. However, in the case of bit Prores you will have your input reduced to 10 bit but that is a limitation of ffmpeg's Prores implementation decoder s and encoder s rather than yadif.

With 12bit prores being rather rare in the wild and the difference being rather hard to detect probably just when doing heavy gradingit seems this hasn't bothered many people so far. I thought this may at least be a limitation of the QuickTime documentation, is there any hard evidence that this isn't the case?

To elaborate: I used fd before yadif was written, but yadif is over seven years old, so there should be no reason to use fd except for some comparison but I would be surprised if you get any results we don't know yet.

handbrake deinterlace double frame rate

Not all do. But assuming the interlacing was not done in the camera but through an interlace filter, the original frame rate was halved, so the best approach is to double the frame rate back to the original. Even if the recording was interlaced, to keep all temporal information that is available in the input video, you will have to double the output frame rate.

handbrake deinterlace double frame rate

This is completely independent from what yadif does by default.Sometimes you may see the video contents playback with a bunch of bars or a series of horizontal lines, that's interlaced effects. If you want a smooth playback of the interlaced materials, you will need to remove the interlacing artefacts by proper deinterlacing. Here we will show you how to deinterlace videos, DV, VCR, VHS, including the basics of interlaced video, progressive and interlacing, best deinterlace software and methods For those who don't want to learn the definitions and explanations, skip to video deinterlacing part below.

When we see resolutions like P, P, i, do they mean the same? No, the P means Progressive scan and i means Interlaced scan. To understand what interlaced video is, let's start from the scanning. When it comes to transmit a video, every frame of the image will be scanned line by line. When each line of image data is canned sequentially from the top left corner of the picture to the bottom right, it's the Progressive Scanning method.

However, broadcasting of signals generated using this method requires a large bandwidth, because increasing the number of scanning lines per picture increases the spatial resolution, which increases the bandwidth required. To reduce the bandwidth, the original frame is divided into two successive fields to display the picture with alternating set of lines. Because human eyes can't catch up with the objects at such a high display rate, we will see a whole image, which is actually made up of two halves of the image.

This is the interlaced scanning. If you want to know more details, check Wiki Interlaced video explanation. To illustrate the differences between the two scanning methods, we'll take the differences i and P as an example, two major broadcasting standards for HDTV.

With P, a full picture will be transferred at once. While with i, a picture is split into two, the first even lines, and the second odd lines. That is to say, P gives lines a frame while i get the half a frame. The half pixels allow half bandwidth to send the information 1, pixels vs 2, pixels.

Command line reference

In other words, P is able to send 60 frames per second and i sends 30 frames per second. Which is better, P or i?

It depends. In short, P with 60fps does better job delivering fast motions like sports or action movies, as the higher frame rate provides more fluent playbacks of fast motions.Ever so often I see a poorly encoded video on the internet, which either has black bars, interlacing artifacts, too low bitrate, too large size, incorrect aspect ratio, … and in the worst cases, a mix of all these things.

Here are some short tips to reduce the risk of making these mistakes. The tips give concrete instructions for the program HandBrakewhich is a freely available, popular, and good tool for encoding videos. In short: ensure that a circle in the original video is still a circle in your encoded video.

For anamorphic material non-square pixelsyou should only convert it to square pixels when downscaling it, otherwise you should preserve the pixels as they are.

The aspect ratio is the width of the displayed video image divided by its height. For instance, classic TV shows had a ratio ofmodern widescreen video typically is Make sure that no matter how you rescale your video e.

Subscribe to RSS

There is one caveat here regarding standard-definition TV material. Suppose you have a recording on DVD in standard p widescreen format. Mind how this does not correspond to a ratio even though your TV displays it as such, it is actually a ratio.

What gives? Well, your TV knows that the video is supposed to be displayed as and will therefore stretch it horizontally while rendering the image. This means the pixels are not square, like they are in all recent formats like p and p. When converting such a DVD to a video file on a hard disk, you may be tempted to make the pixels square. My advice is not to do this unless you are downscaling the video. Make sure that the output has the same framerate as the original source material e.

If the input is certain to have no interlacing, then disable everything related to deinterlacing. If the input is a movie that was converted to NTSC by a hard telecine process, enable detelecine and force the framerate to Interlacing is the practice of embedding two video images in one frame, with each odd line of the frame belonging to the first image, and each even line to the second or vice versa. This stems from the era of cathode ray tube CRT televisions.

This way, one could transport e. Of course, the vertical resolution of each field was halved, but in case of a static image, each frame retains the full resolution. This was a clever trick to exchange temporal and spatial resolution. Interlacing does not play well however with panel displays, which lack the memory effect of a typical CRT that provides a natural smoothing of interlaced material.

Moreover, your average computer monitor is totally unaware of whether you are playing something interlaced or not.

Some media players can perform deinterlacing on-the-fly. If you are re-encoding an interlaced video anyway, it is better to apply high-quality deinterlacing to obtain a progressive video that can be readily played. Removing the interlacing artefacts also makes the video much easier to compress. There are two main approaches here: either always deinterlace unconditionally, or try to be smart and only deinterlace for frames or even parts of each frame that appear to be interlaced.Before you start posting please read the forum rules.

By posting to this forum you agree to abide by the rules. In handbrake it is possible to do deinterlacing with either decomb or deinterlacing filters. That's yadif, a spatially within one frame and temporally between several frames aware deinterlacer. The tweak is that it uses a looks at more pixels when generating the spatial predictions.

This preserves more detail from the image than yadif, and in particular prevents noticeable deinterlacing artifacts on progressive video. My question is, if I use decomb or deinterlacing filter in HandBrake, what frame rate I should choose? The same as source 25i or I should double it to 50 FPS? Thank you for your input in advance!

Shutterspeed and Frame Rates // Explained with a Fidget Spinner

Same as source will output I think The Decomb filter also has a Bob option, so I assume it'd work the same way. If you use the variable frame rate option I've no idea what'll happen.

I'm no expert when it comes to de-interlacing but I think the best idea is to de-interlace if the video is interlaced and disable it completely when it isn't. Alternative you use a filter like Decomb and hope it makes the correct choice most of the time. I can't tell you how well it works as I've not encoded with it much. I did try a few little test encodes a while back and thought it did a good job but I wouldn't take that as gospel. Maybe a Handbrake user will come along It's not hard to use once you get it working, and if there's progressive sections it shouldn't adversely effect them.

In fact it also has a progressive mode which I use regularly. Have a look at the samples here and here. Originally Posted by somy. As far as I know, Bob de-interlacing was only added to Handbrake fairly recently sometime last yearso while that thread was probably correct then, it's wrong now. I'm pretty sure VidCoder does.

Unfortunately, Handbrake's log file seems not to be overly specific about it's de-interlacing. Last edited by somy; 17th January at Find More Posts by nm. Thank you very much for the very helpful reply. If not, I would probably just keep the original 25 FPS for now. This has already been alluded to but I want to stress it. I always want people to create the highest quality videos they can, especially from unique sources. To help convince you to always use double rate deinterlacing: True interlaced video like that from a camcorder has 50 discrete points in time.

Interlaced video has stored the frame as fields which are made up of every other line of the full frame of video.Deinterlacing is the process of converting traditional Interlaced Video into a Progressive Picture that can be displayed on modern non interlaced display devices such as LCD or Plasma screens. While targeted at DivX authoring, the visual examples from the following site are valuable in demonstrating artifacts that one may see with various forms of deinterlacing:.

MythTV has several options for Deinterlacing. You may find that you have enough resources to use a powerful deinterlacer for your SDTV i content, but you need to use a less resource-hungry deinterlacer for i. To custom tune exactly for your system, you may need to just try different deinterlacers to see which look best on your screen and which don't overtax your CPU.

If you see signs of tearing discontinuities in the videojittery video, prebuffering pauses and your CPU usage is high, you may be overtaxing things. If you see lots of "combing," where moving objects have alternating teeth, you may not be deinterlacing at all.

Note that the deinterlacers available vary based on your renderer. For example, you will find many more deinterlacing choices if you use the OpenGL renderer and some high-quality hardware deinterlacers with the VDPAU system.

There is a python script available for Comparing deinterlacers. The best deinterlacers will double the frame rate typically For each field, they will build a whole frame. This requires that your display be able to operate at this doubled frame rate. Surprisingly some displays are just a hair below that, in which case MythTV will switch to your "fallback" deinterlacer, as set on your configuration screen.

Doubling the frame rate requires a lot more resources. Some video comes at 25fps, which doubles to 50fps and should not have a problem with the monitor refresh rate. You may also encounter problems with loss of deinterlacing if doing time stretch.

Your TV probably has a fairly good quality hardware deinterlacer. To make use of those hardware deinterlacers, you must have your video card output an interlaced video signal to the TV. This typically requires, in X, a special modeline for the display. Because you will not want to use interlaced output for p or p video, you will want to set up MythTV to use different video modes depending on what type of stream is being played.

When using native deinterlacing, you would set your deinterlacer to none. You will not be able to zoomand may have trouble doing time stretchbut you will get quality deinterlacing with minimal CPU.

Please note that many people have had problems getting NVIDIA video cards to properly output an interlaced video signal. Some have played tricks, like using a 60 frame per second line mode line. These are arranged in approximate order of preference.

MythTV has a number of 2x deinterlacers which attempt to turn 30 Hz or 25 Hz interlaced video into 60 Hz or 50 Hz progressive video. The aim is to improve on non-2x deinterlacers which look fine for static scenes but create jumpiness when the scene contains motion.

If the display is not capable of displaying 2x the frame rate, then MythTV will use the fallback deinterlacer. The downside is that these elements are scaled with the video.

When watching low resolution video i on a display the menus appear very blurry.

handbrake deinterlace double frame rate

The deinterlacers in this mode are in order of preference :. It is recommended that you try each in order until you find the best your system can cope with without stutter. OpenGL is recommended for those without nVidia cards and have interlaced video. It allows the UI elements to scale correctly and offers the same deinterlacing methods as the section above.

The Advanced 2x deinterlacer is thought by many to be the best, but it requires an GeForce card in the 8x series The does not support VDPAU or a or above. Reports on the are not available, but it is likely to work.


thoughts on “Handbrake deinterlace double frame rate

Leave a Reply

Your email address will not be published. Required fields are marked *