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Key Frame Interval Advanced users can choose to insert key frames at desired intervals in the event the intervals between scene changes are very long. The DivX encoder will automatically insert a key frame every time it detects a scene change. However, it is possible to insert key frames if there is a long interval between scene changes.

In Dr. DivX, you can specify the interval at which the key frame I frame will be inserted. Reducing the key frame interval can also improve delays and the quality of streaming content. Enter a value to indicate the interval at which a key frame has to be inserted. This value will be used only if the interval between scene changes exceeds the value specified.

If the scene changes earlier than the specified frames, the encoder will insert a key frame regardless of the value specified. DivX provides an option to manually change these settings. Use the slider to change the Scene Change Threshold settings. This is indicated in percentage adjacent to the slider. NOTE: If you are not familiar with the concept of key frames, please do not make any changes in the settings.

The new 5. The fastest mode does no motion estimation and can be used to create a large high quality file for live capture or DV capture to then re-encode with Dr. DivX Profile Editor Dr. DivX Profile Editor is a useful utility that is installed with Dr. Using the Dr. DivX Profile Editor you can create, modify and save profiles that you use to encode your video. NOTE: Dr. DivX comes with built-in default profiles for video encoding.

The Dr. DivX Profile Editor is to further enable you to modify the encoder settings to obtain results specific to your encoding needs. Please remember that the settings in a profile will have a direct impact on the quality and size of the output video. Features Using Dr. Make the necessary selections and settings All the different parameters have been discussed in detail under the Modifying Advanced Settings chapter.

Please read Modifying Advanced Settings for details about modifying each parameter. You can assign a file name for the profile file. This file can be used as an encoding profile file to encode a video using Dr. This file can be modified using the Dr. DivX Profile Editor as needed.

Navigate to the location where you have your profile files saved. Select the profile file. Make modifications All the different parameters have been discussed in detail under the Modifying Advanced Settings section of help. EKG Features Dr. The EKG enables an advanced video compressionist to reallocate data to specific scenes within a video clip. The EKG will allow a compressionist the ability to change or reallocate data to specific areas within a DivX Encoded video that may need more or less data.

During 2-Pass encoding, this data is further analyzed so that bits may be more accurately distributed during the second pass of encoding. In the first pass, the rate control module looks complete through the whole video sequences and records the overall complexity level of the video. In the second pass, the rate control module then adjusts the quantizer for. This log will contain details of each frame, and helps the codec make decisions in the second pass as to how to encode that file.

After the second pass, you can run the EKG and make adjustments to each frame based on the quality you would like for that frame or group of frames. You can choose to enhance or compromise on quality at various sections of the video to derive desired results. The EKG has built-in features that will enable you to fine tune your output video to get the desired output. Figure 7. Determine a frame or sequence of frames where you want to increase or decrease the quality.

After deciding which frames or sequence of frames you like to modify, use your mouse pointer to select a frame or a sequence of frames. To select multiple frames or a sequence of frames, hold down the Shift button. See Figure 7. Increase or decrease the quality for the selected frame s by moving the Modulation Parameter, represented by a thick horizontal bar. After changing the Modulation Parameter, the horizontal thin beige line will represent your new Modulation Parameter.

This will put the saved job in the Batch Encode area ready to be encoded. To start the job, click Batch Encoding in Dr.

DivX, and follow the encoding process as described in Chapter 3 for Batch Encoding. EKG Visualization Dr. DivX EKG offers different visualization options to make the interface more intrinsic. Glossary Pull down The converting of 24 fps film to 30 fps video wherein every other frame of film is held for 3 fields of video.

The resulting video has a repeating sequence of 3 fields followed by 2 fields. It can support up to 5. It defines how video and audio are attached to each other, without specifying a codec. Prior to DivX 5. I-frames are encoded only using information from within its own frame. It does not use any information from other frames temporal compression. Pframes Predicted are forward predicted and may refer to either an I-frame or P-frame.

They are encoded from the frame that precedes it. In any video sequence a group of frames will have many of the same images. Remember that there are commonly up to 30 frames in a single second. So instead of encoding each one of those 30 frames independently as you would in an image file such as a JPEG you can exploit the redundancy of each frame by the use of P-frames. Essentially we transmit the difference between frames which is more efficient than transmitting the original I-frame.

DivX Pro 5. B-frames allow the DivX codec to predict frames from the future, choosing the best prediction match among 2 prediction frames instead of only one. B-frames are not only codec by using forward predicted frames but also from backward predicted frames which can be an I or P frame.

Using B-frames reduces the amount of data needed to code a frame and improves quality more specifically in areas where moving objects reveal hidden areas. Bit rate In a bit stream, the number of bits occurring per unit time usually expressed in bits per second. Brightness The intensity of a color as determined on a scale from black no brightness to white maximum brightness.

Constant bit rate gives equal bits to each frame of a movie. Variable Bit rate gauges which frames need more bits to maintain a better image.

Note: high motion scenes require more bits than low motions scenes. Composite Video A signal in which the luminance, chrominance, and sync information are combined into one signal using one of the coding standards. De-blocking The filter operates along the 8x8 block edges , on both the luminance and chrominance color planes. It helps to reduce the blocking artifacts caused by the DCT spatial compression algorithm used by the codec.

Blocking is the most noticeable artifact, so this is the first algorithm to be applied. De-ringing The de-ringing filter is used to eliminate noise near sharp edges caused by the quantization process the socalled Gibbs effect. The noise is more noticeable in animations, where there are higher frequency coefficients. The deringing on the luminance plane is activated at post-processing level 6. Deinterlace To remove artifacts that result from the nature of two-fields -per-frame interlaced video.

Demultiplexing The opposite of multiplexing. Digital Video Digital video is usually compressed because it takes Terabytes thousands of Gigabytes or for the mathematicians among you: Bytes to store an uncompressed movie. Since that is still not enough modern compression, algorithms use key frames and I and P frames to save space.

DirectX DirectX is an application program interface developed by Microsoft, first for Windows 95, for creating and managing graphic images and multimedia effects in applications such as games and active Web pages.

Encoding The process of taking a raw uncompressed file and compressing it to an encoded form while maintaining the quality. FilmFX The film fx post-processing algorithm adds warmth to video for those who like the warmth behind film versus the crispness of digital video. Frame The basic source of a movie; one frame represents one image. A movie usually runs at 24 frames per second, equaling 24 different images per second.

Imagine 24 images with a bird on it. In the first image, the bird is on the left, gradually moving to the right. On the 24th frame the bird is on the right end of the image. When these 24 images are played in sequence fast enough, the human eye sees a bird flying from left to right.

Frame serving Frame serving is using one utility to decode or read a video file and after it has been decoded, sending it straight to any other video editing or encoding application. The ability to reduce the required data from one frame to the next can be reduced since there is a commonality within panning and zooming scenes that can be used to more efficiently compensate for what is more normally a group of blocks in such scenes.

Say we have a key frame with a bird before a cloudy sky. Then we can use I frames which say something like this: Move the bird an inch to the left and one inch to the bottom. Inverse Telecine The inverse of Telecine. This process is performed to extract the original 24fps of a Letterbox The aspect ratio of motion pictures is wider than those of standard televisions.

To preserve the original aspect ratio of a motion picture, a motion picture includes black bars at the top and bottom of the screen when played on television. MP3 MP3 MPEG-1 Audio Layer-3 is a standard technology and format for compression a sound sequence into a very small file about one-twelfth the size of the original file while preserving the original level of sound quality when it is played.

MP3 technology uses psycho-acoustic modeling to reduce the file size of an audio file while retaining the highest level of quality. It is the standard for the mature digital era. An encoder supporting multipass will, in a first pass, analyze the video stream to be encoded and write down a log about everything it encounters.

Then it leads over to a karate fight with lots of fast cuts and a lot of action people flying through the air, kicking, punching, etc. The more passes, the more refined the bit rate distribution will be.

In single pass VBR, the encoder has to base his decisions on where to use how much bit rate solely on the knowledge of the stuff it previously has encoded. Multiplexing Video and audio are usually encoded separately.

You have to join them to make a movie you can play you can play audio and video separately in two players but to get synch would be rather hard. The audio signal is converted in samples according to the frequency of the signal. DivX to crash at the beginning of second pass if various codec packs were installed. Changing audio bitrate in modify settings step, will now adjust video bitrate accordingly to maintain requested file size for output.

Fixed a bug with EKG that would complain about the mismatch of the number of frames. Read the special activation instructions. Fixed: A bug where Dr. DivX would not start due to a debugger detected. A bug where Dr. DivX would not run on Windows platform. Files encoded with Dr. Encoded files will now play on Archos Multimedia Jukebox. A bug where it would crash on second pass with some AC3 filters. A bug for multi-processor or hyper threaded machines when opening VOB files.

Added a separate registration application. Auto crop to be more accurate. A bug where it would crash in filtergraph. Auto-detection of cropping. Auto-detection of interlace and pull down. Auto-detection of resolution and aspect ratio. Create and save custom encoding profiles.

Batch encoding mode to encode hundreds of video clips with ease. Integrated EKG to fine-tune your video. AC3 decoders tested in order from most reliable to least stable AC3 filter ac3filter. Volume levels are low, but can be adjusted in the AC3 configuration utility. DivX to hang on certain input files. During Batch encode, some audio tracks could be lost. DivX now prevents external filters such as Morgan Stream Switcher from being used inadvertently. DV CAM de-interlacing now works properly.

Fixed a bug that caused video splitting x file of y size to malfunction. Fixed a bug that caused information section to not update jobs properly. Fixed a bug that caused the application to crash during preview of DV.

Fixed a bug that caused profile editor to not restrict profile to certification levels. A single pass batch encoding job will not cause Dr. DivX to crash. DivX there are two other files you have to download separately to get the program to work.

After you do this, it works fine. Go to the DivX. Review by Timoleon on Dec 3, Version: 2. I agree. I must agree with previous post, not worth bothering with. Review by peterbuilt on Dec 3, Version: 2. Not many settings available yet. Conclusion: Leave this alone. After all hype, a real dissapointment. Just a quick note to clarify here Dr. DivX has never nor will ever install Adware. The DivX codec older versions used to have a free version that came with adware. That is also no longer the case.

Please send me feedback on Dr. DivX, what you love, hate, use, don't use etc. DivX forum at DivX. Review by thedivxkid on Jul 15, Version: 1. I have been using this product since it was in Beta, and it works well for me. I have encoded movies ripped from one of my DVD's - it handled the vob file directly, and gave me a very, very good movie to watch. I use it to shrink TV shows captured but not yet watched.

Dr DivX lets me batch several files and then encodes them overnight. You can control the parameters and destination directory for each file seperately. All in all, a very useful tool, well worth the month. Having said that - I strongly suggest downloading the demo version, to ensure that it does work on your system. This programs constantly crashes and can yet to reencode any piece of video I have thrown at it.

They say on the website that if Windows Media Player can play it they can reencode it. Please dont waste your money on this CRAP. Review by gatortail80 on Jul 15, Version: 1. I only have two problems with Dr.

Review by JoNty on May 7, Version: 1. Review by jakeWA on May 6, Version: 1. If you want to convert to DIVX this is the tool to use. It has converted everything I have ever thrown at it. The best thing about it is the settings it picks are almost always good. It has a batch mode so you can queue up files to convert over night. Version 1. Review by wdosch on Apr 20, Version: 1.

I like this program for conversion to divx. It crops great it converts everything I throw at it! It is my Xvid problem solver! I have had no problems with conversions, my only hope is that they incorporate a feature to encode a movie back to back. This way I could set several movies up at 1 time, go to work and come home to divx movies! Review by thundercrush on Apr 19, Version: 1. Very easy to use, working fine and stable for me 1. If it doesn't work for somebody, the problem could be an unstable operating system.

Review by antist r on Jan 15, Version: 1. This piece of software is really horrible! It constantly crashes, and even if you do encode some video there are problems with sync and video quality. If you have already paid for this software like I did try and get a refund because you just got shafted by the folks at DivX! It works - and it's free. Review by Dirk on Jan 8, Version: 1. Simply stating, encoding an take for ever, there is no telling.

Great change you will get no audio. It is nowhere ready to be released, Wait until at least 1. How do oyu rate a product that does not work. Review by jolo on Sep 14, Version: 1. You have to control it manually in the advanced-settings.

Review by weissgold on Aug 6, Version: 1. I been messing about with Dr Divx for the past week now and I have to say once you discover its limitations and bugs it really is a good encoder. As for the logo, I think its quite cool and only last a couple of seconds at the start of the file. Ummm A fast encoder with excellent quality.

This piece of software is horrible! I would rate this a ZERO if the rating went that low! If you have already paid for this software try and get a refund because you just got shafted by the folks at DivX!

Review by SidSoft on Jul 27, Version: 1. This software is huge - wizard based, yet with all advanced settings, filters, plug-ins, live recording Just choose what you need, e. Using max quality it compressed my MPEG2 movies over 10 times smaller! I found no spyware installed and I am using both adaware and spybot.

Now the interesting part - the previous posts mentioned a DivX logo and a messed up beginning, but this is not true! It does look like it at first, but if you click stop and then play again then it plays perfectly and with no logo!



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