How To Convert Ffmpeg Complex Filter To Ffmpeg Python

Correctdc, cEnable DC bias correction. An audio signal is a sequence of pattern values. In the Dynamic Audio Normalizer these pattern values are represented within the -1.0 to 1.0 range, whatever the unique enter format. Normally, the audio signal, or "waveform", ought to be centered across the zero point. That means if we calculate the imply worth of all samples in a file, or in a single frame, then the outcome ought to be 0.0 or at the least very near to that value. Since a DC bias is clearly undesirable, the Dynamic Audio Normalizer gives you non-compulsory DC bias correction.

Also, to be able to ward off "gaps" on the body boundaries, the DC correction offset values will probably be interpolated easily between neighbouring frames. A filtergraph is setup right here utilizing the -filter_complex possibility and consists of a single video filter. Due to this, automated choice of the video stream is skipped, which might have chosen the stream in B.mp4.

The audio stream with most channels viz. Stream 3in B.mp4, is chosen automatically. No subtitle stream is chosen however, because the MP4 format has no default subtitle encoder registered, and the consumer hasn't specified a subtitle encoder. This filter logs a message and units body metadata when it detects that the enter video has no noticeable change in content material for the duration of a specified duration.

Video freeze detection calculates the imply typical absolute big difference of all of the elements of video frames and compares it to a noise floor. Changing these values can allow distinct scan rates/frame charges and avoiding green bars on the bottom, flickering scan lines, etc. Note that with some devices, altering these properties can even impact future invocations till system reboot occurs. Pack two distinct video streams right into a stereoscopic video, setting suitable metadata on supported codecs. The two views must have the identical measurement and framerate and processing will cease when the shorter video ends.

Please observe that you'll conveniently modify view properties with the size andfps filters. Compress, sSet the compress factor. By default, the Dynamic Audio Normalizer doesn't apply "traditional" compression. This signifies that signal peaks is not going to be pruned and thus the whole dynamic vary shall be retained inside every native neighbourhood. However, in some instances it could be fascinating to mix the Dynamic Audio Normalizer's normalization algorithm with a extra "traditional" compression.

For this purpose, the Dynamic Audio Normalizer supplies an elective compression function. If the compression function is enabled, all enter frames shall be processed by a gentle knee thresholding operate simply before the genuine normalization process. Put simply, the thresholding operate goes to prune all samples whose magnitude exceeds a specific threshold value. However, the Dynamic Audio Normalizer doesn't merely apply a hard and fast threshold value. Instead, the edge worth shall be adjusted for every particular person frame. In general, smaller parameters induce stronger compression, and vice versa.

Values under 3.0 should not recommended, considering the fact that audible distortion could appear. The AC-3 metadata alternatives are used to set parameters that describe the audio, however usually don't have an effect on the audio encoding itself. Some of the choices do immediately have an effect on or have an effect on the decoding and playback of the ensuing bitstream, at the same time others are only for informational purposes. A few of the choices will add bits to the output stream that would in any different case be used for audio data, and can thus have an effect on the standard of the output.

Those might be indicated accordingly with a observe within the choice listing below. This is a typical DVD ripping example; the enter is a VOB file, the output an AVI file with MPEG-4 video and MP3 audio. Furthermore, the audio stream is MP3-encoded so you'll want to allow LAME help by passing --enable-libmp3lame to configure. The mapping is especially helpful for DVD transcoding to get the specified audio language. MappingSet the vacation spot indexes of enter frames.

This is area or '|' separated record of indexes that maps enter frames to output frames. Number of indexes additionally units maximal worth that every index could have. '-1' index have particular which means and that's to drop frame. This filter operates on 8-bit RGB format frames by setting the alpha element of every pixel which falls inside the similarity radius of the important thing shade to 0. The alpha worth for pixels exterior the similarity radius is determined by the worth of the mix option. First_ptsFor swr only, assume the primary pts must be this value.

The time unit is 1 / pattern rate. This makes it possible for for padding/trimming at first of stream. By default, no assumption is made concerning the primary frame's envisioned pts, so no padding or trimming is done.

Timestamp_alignCapture begin time alignment in seconds. If set to nonzero, enter frames are dropped until the system timestamp aligns with configured value. Alignment big difference of as much as at least one body period is tolerated. This is beneficial for sustaining enter synchronization throughout N totally completely different hardware gadgets deployed for 'N-way' redundancy. The system time of various hardware gadgets ought to be synchronized with protocols reminiscent of NTP or PTP, earlier than utilizing this option. Note that this procedure will not be foolproof.

In some border instances enter synchronization could not ensue resulting from string scheduling jitters within the OS. Either sync might go incorrect by 1 body or in a rarer casetimestamp_align seconds. Measures part of enter audio, which is exported as metadata lavfi.aphasemeter.phase, representing imply part of existing audio frame. A video output could even be produced and is enabled by default. The audio is handed as a result of as first output. There are three output records specified, and for the primary two, no -map possibilities are set, so ffmpeg will pick out streams for these two records automatically..

Out1.mkv is a Matroska container file and accepts video, audio and subtitle streams, so ffmpeg will attempt to go with out certainly one of every type. Window_sizeSet most well-liked window size, is usually a string of the shape widthxheight or a video measurement abbreviation. If not specified it defaults to the dimensions of the enter video, downscaled in response to the side ratio. Mostly usable when no_window will not be set. DeckLink could be very choosy concerning the codecs it supports.

Pixel format of the enter will be set with raw_format. Framerate and video measurement should be decided on your gadget with-list_formats 1. Audio pattern price is usually forty eight kHz and the variety of channels will be 2, eight or 16.

Note that each one audio channels are bundled in a single single audio track. This possibility is enabled by default. It is due to this fact not presently possible, for example, to show two separate mono streams right into a single stereo stream. However splitting a stereo stream into two single channel mono streams is possible. For the third output, codec possibility for audio streams has been set to copy, so no decoding-filtering-encoding operations will occur, or can occur.

Packets of chosen streams shall be conveyed from the enter file and muxed inside the output file. 'stop'Get the present time and fetch the lavfi.bench.start_time metadata from the enter body metadata to get the time difference. Time difference, average, most and minimal time are then printed. The timestamps are expressed in seconds.

The filter will apply luma_power, chroma_power, alpha_power occasions onto the corresponding plane. The setparams filter marks interlace and colour vary for the output frames. It doesn't change the enter frame, however solely units the corresponding property, which impacts how the body is handled by filters/encoders. Apply_dolbyvisionApply Dolby Vision RPU metadata if current in supply frames, and strip it from the output.

Note that Dolby Vision will forever output BT.2020+PQ, overriding the standard enter body metadata. These can even be picked because the values of auto for the respective body output options. EBU R128 loudness normalization. Includes each dynamic and linear normalization modes. Support for each single move and double move modes. This algorithm can goal IL, LRA, and optimum true peak.

In dynamic mode, to precisely detect true peaks, the audio stream should be upsampled to 192 kHz. Use the -ar choice or aresample filter to explicitly set an output pattern rate. By default, the Dynamic Audio Normalizer performs "peak" normalization. This signifies that the utmost native attain aspect for every body is outlined by the frame's highest magnitude sample. This way, the samples should be amplified as a lot as available with out exceeding the utmost signal level, i.e. with out clipping. Optionally, however, the Dynamic Audio Normalizer can even consider the frame's root imply square, abbreviated RMS.

In electrical engineering, the RMS is usually used to work out the facility of a time-varying signal. It is for that reason thought-about that the RMS is a more robust approximation of the "perceived loudness" than simply taking a look on the signal's peak magnitude. Consequently, by adjusting all frames to a continuing RMS value, a uniform "perceived loudness" should be established. If a goal RMS worth has been specified, a frame's neighborhood attain aspect is outlined because the aspect that might end in simply that RMS value. Note, however, that the utmost neighborhood attain aspect continues to be restricted by the frame's highest magnitude sample, which will ward off clipping. Framelen, fSet the body size in milliseconds.

In variety from 10 to 8000 milliseconds. The Dynamic Audio Normalizer processes the enter audio in small chunks, often called frames. This is required, since a peak magnitude has no which means for only a single pattern value. Instead, we have to work out the height magnitude for a contiguous sequence of pattern values. The size of a body is laid out in milliseconds.

By default, the Dynamic Audio Normalizer makes use of a body size of 500 milliseconds, which has been observed to offer good outcomes with most files. Note that the precise body length, in variety of samples, will probably be decided automatically, centered on the sampling fee of the person enter audio file. So start/end_pts and start/end_sample will give completely different outcomes when the timestamps are wrong, inexact or don't commence at zero.

Also notice that this filter doesn't modify the timestamps. If you want the output timestamps commence at zero, insert the asetpts filter after the atrim filter. Duration, dSpecify the period of the fade effect.

See(ffmpeg-utils)the Time period part within the ffmpeg-utils manualfor the accepted syntax. By default the period is decided by nb_samples. If set this feature is used rather than nb_samples. Window_sizeSet the SDL window size, could be a string of the formwidthxheight or a video measurement abbreviation.

Wait_for_tc Drop frames until a body with timecode is received. Sometimes serial timecode isn't acquired with the primary enter frame. If that happens, the saved stream timecode might be inaccurate. If this feature is about to true, enter frames are dropped until a body with timecode is received. Option timecode_format should be specified.

This muxer outputs streams to a couple of separate records of close to fastened duration. Output filename sample could very well be set in a style a twin of image2, or through the use of a strftime template if the strftime possibility is enabled. The time base is copied to the output encoder from the corresponding enter demuxer. This is usually required to evade non monotonically rising timestamps when copying video streams with variable body rate. The order of the "-map_channel" possibility specifies the order of the channels within the output stream.

The output channel structure is guessed from the variety of channels mapped (mono if one "-map_channel", stereo if two, etc.). Although out1.mkv is a Matroska container file which accepts subtitle streams, solely a video and audio stream shall be selected. However, inout2.mkv, a subtitle encoder is laid out within the command and so, the subtitle stream is selected, besides the video stream. The presence of -an disables audio stream choice for out2.mkv. In the absence of any map alternatives for a specific output file, ffmpeg inspects the output format to envision which sort of streams should be included in it, viz. For every acceptable stream type, ffmpeg will elect one stream, when available, from amongst all of the inputs.

Synthesize audio from 2 enter video spectrums, first enter stream represents magnitude throughout time and second represents part throughout time. The filter will rework from frequency area as displayed in movies to come back to time area as introduced in audio output. The setrange filter marks the colour vary property for the output frames. It doesn't change the enter frame, however solely units the corresponding property, which impacts how the body is handled by following filters. If set to 1, the audio enter will probably be segmented into 100ms output frames, every of them containing numerous loudness facts in metadata.

All the metadata keys are prefixed with lavfi.r128.. Xmap and Ymap enter video streams should be of identical dimensions. Output video stream may have Xmap/Ymap video stream dimensions. Xmap and Ymap enter video streams are 16bit depth, single channel.

Colorspacecolor_primariescolor_trcrangeConfigure the colorspace that output frames shall be delivered in. The default worth of auto outputs frames within the identical format because the enter frames, resulting in no change. For some different value, conversion shall be performed.

When Will Apple Watch 6 Release In India

The Apple Watch Series 7 offers the same suite of sensors as the Series 6. These include an accelerometer, a gyroscope, a heart rate sensor, a barometer, an always-on altimeter, a compass, an SpO2 sensor, and a VO2 max sensor. These sensors have a host of health and fitness tracking features, including blood oxygen monitoring, heart rate monitoring, sleep tracking, fall detection, workout tracking, and more. The gadget is expected to be facilitated with the capacity to monitor blood oxygen levels with heart rate monitoring signal warning if there is drop in levels preventing an impending cardiac arrest.

The Apple Watch is equipped to track the wearer's temperature, the feature being added as a relevant and essential component in the pandemic scenario, by the makers. Equipped with its new software OS 7, the apple 6 watch will be able to provide enhanced and improved sleep tracking facility. Additional features include a new S6 processor that is up to 20% faster than the S4 and S5, a 2.5× brighter always-on display, and an always-on altimeter.

The Series 6 watch was updated with faster charging hardware such that it completes charging in ~1.5 hours. Force Touch hardware was removed, consistent with the removal of all Force Touch functionality from watchOS 7. The Apple watch series are convenient devices that pack in loads of innovative features to make things easier for you. With the help of these watches, you can stay connected with all things important to you while you work on your health and fitness levels. The device is equipped with several advanced sensors that aid in tracking and measuring your activities and exercise. So, strap on this watch and exercise to have clear insights into your daily workouts.

The device is also designed to be water-resistant, enabling you to keep track of your goals when you swim. This handy device can also let you make calls, view app notifications at a glance, listen to music or podcasts, and text your pals with great convenience. The watch lets you navigate easily with the help of the Maps and take help from Siri to get directions, weather reports, or keep you entertained with the songs of your choice. You can choose from models like Series 5, SE, Series 2, Series 3, and Series 4 available online.

Here, you can also check out the Apple watch series price in India and grab exciting Apple watch series offers during your purchase. As far as specs and features are concerned, the Apple Watch Series 7 is available in 41mm and 45mm size variants. It comes with IP6X dust and water-resistant coating and WR50 water resistance rating.

As far as the battery is concerned, Apple says that the newly launched Apple Watch Series 7 offers 18-hour of battery life, which the company claims charges 33% faster than the older model. The Apple Watch Series 7 is powered by Apple's watchOS 8 and it features an electrical heart sensor, ECG app, Blood Oxygen sensor and app. It also features a new Mindfulness app, along with Apple Wallet, a new Home app and enhancements to Messages and the Photos app. The Series 6 range also helps in measuring your blood oxygen levels. Most of the models are adept at monitoring your fitness levels and notifying you about the weather conditions. The Apple watches price in India is dependent on the built-in features of the various models.

The MKMY3HN/A (Name-Watch Series 7 GPS) is a white-coloured model with a stunning rectangular-shaped dial. Some of its other arresting features include a touchscreen, speakers, microphone, OLED Retina Display, and a S7 Dual Core Processor. This functions on the brand's operating system and has an internal memory of 32 GB.

The scroll-wheel digital crown on the side allows you to zoom, scroll, and navigate in a flawless manner. Apple is a brand renowned for its unparalleled and creative range of products. Till date the brand has introduced eight Apple watches , each loaded with stunning features. An Apple timepiece is a technology marvel designed in a manner that is paired and connected with your iPhone.

You can transfer content from one device to another in a seamless fashion. The entire range is available in rectangular and square-shaped dials of vibrant colours. You can find the straps of these timepieces made of durable leather, nylon, stainless-steel, aluminium among others.

Ideal for men and women, most of these come with a stunning OLED Retina Display and function on the brand's operating system that is iOS. The different models of the brand's spectacular range come with specific features which makes the Apple watches price in India vary accordingly. This wristwear is the ultimate device that aids you in leading a healthy life. You can draw a comparison between the numerous Apple watches offers. It is always advisable to get familiar with the inherent features of this type of merchandise, understand what suits your requirements, and then make a decision to buy Apple watches series online. As for the sensors, the Watch Series 7 has the same sensor as that of the Apple Watch Series 6.

It includes an accelerometer, barometer, ECG , gyroscope, heart rate sensor, SpO2 sensor, and a VO2 Max sensor. Equipped with all these sensors, the Watch Series 7 offers blood oxygen monitoring, fall detection, heart rate monitoring, sleep tracking, and much more. The new Apple Watch 6 features a number of improvements which includes a faster S6 chipset and next-gen always-on altimeter. One of the highlights of the device is its new heart rate sensor, which can be used to measure blood oxygen saturation . The new flagship wearable also comes with an advanced Retina display, accelerometer, gyroscope, and the latest motion sensors. The Apple Watch 6 also has a 2.5x brighter display as compared to its predecessor.

The Apple Watch 6 offers blood oxygen monitoring, a brighter always-on display, an always-on altimeter and a faster chip. Rival smartwatch manufacturers seem to be taking larger leaps forward with their products, while Apple sticks to its incremental process (and it's 18-hour battery life). Buy an Apple Watch as it is more than an accessory on your wrist. It also works like an iPhone with numerous features like maps, app store, siri, apple music, text, make calls, sleep app and more. Get a healthy number of workouts, make a splash with your watch, check your heart rate, measure your blood oxygen levels, and generate ECG on your wrist. New health and fitness features, including low-range VO2 Max, sleep tracking, automatic handwashing detection, and new workout types, can help users better understand overall well-being.

Conveniently accessible on the wrist, Maps includes cycling directions and Siri offers language translation. Apple Watch Series 4, which launched a year later, featured a major redesign with a screen that was 30% bigger in both models and a 50% improvement on its processor over the Series 3 version. Speakers and microphones were rearranged so they were louder and more useful, and Series 4 introduced the fall detection feature, ECG capabilities, and the second-generation heart rate monitor. Apple Watch Series 7 provides all-day 18-hour battery life on a single charge, and 33 percent faster charging compared with Apple Watch Series 6, through a new charging architecture and Magnetic Fast Charger USB-C Cable. Apple Watch uses advanced algorithms to analyze GPS, heart rate, accelerometer and gyroscope data to detect when users begin a ride and prompts them to start an Outdoor Cycle workout if one was not initiated. The Apple Watch Series 6 is powered by the new S6 SiP and offers new hardware and software features.

You get a brand new SpO2 sensor for blood oxygenation levels and VO2 MAx readings from workouts. Thanks to the new SiP we also get fast-charging of the Apple Watch for the first time, topping the battery from 5 percent to full in about 90 minutes. The Apple Watch is one accurate device when it comes to tracking different forms of workouts, recording the duration, effort and heart-rate related metrics with great accuracy. As far as the Apple Watch's smart capabilities are concerned, the app ecosystem for the Watch has come a really long way, allowing the watch to be a seamless extension of your iPhone. It comes with the biggest display we have ever seen on an Apple Watch and comes with IP6X certification for water and dust resistance. The watch is equipped with an electrical heart sensor and a Blood Oxygen sensor.

Apple Watch 6 Release In India The Apple Watch Series 7 comes with an 18-hours claimed battery life and supports 33 percent faster charging than its predecessor. The new Apple Watch Series 6 is powered by an S6 chip and lets you monitor blood oxygen levels. This blood oxygen tracker is a feature of watchOS 7 that will release tomorrow. The smartwatch also comes with features like an always-on display, sleep tracking, automatic handwashing detection and more.

Initial reviews for the device have been generally positive with some caveats. Reviewers praised the watch's potential ability to integrate into everyday life and the overall design of the product, but noted issues of speed and price. Many reviewers described the watch as functional and convenient, while also noting failure to offer as much potential functionality as preceding smartphones. Farhad Manjoo of The New York Times mentioned the device's steep learning curve, stating it took him "three long, often confusing and frustrating days" to become accustomed to watchOS 1, but loved it thereafter. Some reviewers also compared it to competing products, such as Android Wear devices, and claimed "The Smartwatch Finally Makes Sense".

He concluded that there is no "killer application" so far besides telling the time, which is the basic function of a wristwatch anyhow. But use sleep tracking and we found we'd eaten away at 20 per cent of the battery life after six or seven hours of sleep. While you sleep the Watch does go into sleep mode so that always-on display doesn't keep you awake, but the blood oxygen monitor and heart rate monitor are still working periodically, checking your vitals. The new software comes with numerous health and fitness features.

Apart from the usual features like fall detection, ECG and cycle tracking, there are few additional features this time around. The headlining features include a new Sleep App for sleep tracking, VO2 Max and handwashing detection. There's also Blood Oxygen saturation monitoring through SpO2 sensor. Apple hasn't explicitly mentioned the battery capacity of the Watch Series 7, but it should last an entire day on a single charge. However, compared the previous generation smartwatch model, the Watch Series 7 charges 33% faster. Apple has updated the charging architecture and used a Magnetic Fast Charger with a USB-C cable for the Watch Series 7.

The watch's battery level can go from 0-80% in around 45 minutes. If you charge the Watch Series 7 for up to 8 minutes, you can easily get 8 hours of sleep tracking. Apple also launched a more affordable Apple Watch called Watch SE. It features a retina display and is powered by S5 dual-core SiP. It comes with features like fall detection, sleep tracker, handwash reminders, emergency SOS and so on. The workout modes include running, walking, yoga, cycling, high-intensity interval training, and dance. It will show you details like distance, pace, laps, cadence, calories burned, and heart rate.

TechRadar gave it a score of 4.5/5, calling it one of the top smartwatches, while criticizing the short battery life. Digital Trends gave it a score of 5/5, calling it Apple's best product and praising the design, build quality, and software, among others, while criticizing the battery life. CNET gave it a score of 8.2/10, calling it the "best overall smartwatch around", while criticizing the battery life and lack of watch face options.

T3 gave it a score of 5/5, calling it a "truly next-gen smartwatch" due to its thinner body and bigger screen compared to the Series 3, and health features. In comparison to other Apple products and competing smartwatches, marketing of the Apple Watch promoted the device as a fashion accessory. Apple later focused on its health and fitness-oriented features, in an effort to compete with dedicated activity trackers. The watchOS 3 added fitness tracking for wheelchair users, social sharing in the Activity app, and a Breathe app to facilitate mindfulness. The biggest new feature in the Apple Watch Series 6 is the blood oxygen monitoring. Apple clearly states on its website that this isn't a tool intended for medical purpose and is certainly not an indicator of whether a person is infected by coronavirus or not.

The feature works through a blood oxygen sensor, just like a pulse oximeter. What it does it checks if your blood oxygen saturation levels are fine or not. There's a dedicated app on Watch which takes about 15 seconds to show the results.

You've to keep your wrist steady and on a flat surface to get accurate results. The Watch Series 6 also keeps taking measurements routinely in the background — even when you are sleeping. If you open the app on the Watch, then you can see the most recent reading.

It's a nice health feature to have on the Watch but we aren't sure if it's a compelling one to make a case, say over the Watch SE. This Watch brought a new S6 processor, up to 20% faster than its predecessor, a brighter Always-On display, a blood oxygen app, and an always-on altimeter, alongside new health sensors. Going by the rumors, Apple is getting ready to launch some of the long-awaited Apple Watch features later this year. That includes a refreshed design, blood sugar monitoring, improved sleep tracking, and more.

Will Apple Watch 7 use a mini-LED display like the M1 iPad Pro 2021? Instead of the S7 System-in-Package that powers the Series 7, the Apple Watch SE is equipped with the same S5 System-in-Package that was used in the Series 5. It's not as fast as the S7 chip, but it's two times faster than the chip in the Series 3, which is the other low-cost model.

The Apple Watch SE and Series 7 offer the same 18-hour battery life, but the Apple Watch Series 7 can charge much faster with just eight minutes of charging providing up to eight hours of sleep tracking time. There are some tradeoffs with the Apple Watch Series 3 however since it is a much older model, such as a smaller display, an older chipset, and the lack of a compass, fall detection, or noise monitoring. The Apple Watch SE is one of Apple's more affordable smartwatches, offering the S5 chip, an optical heart rate sensor, an always-on altimeter, and fall detection, at a price of $279.

Announced in September of 2020, the Apple Watch SE is now over a year old. Since there has not been an Apple Watch SE before, it is difficult to ascertain exactly how far through its product cycle it may be. Additional sensors integrated into the Watch include an accelerometer, gyroscope, and barometer, which are used to determine device orientation, user movement, and altitude. The back of all Apple Watches is equipped with a Heart Rate Monitor, which projects infrared and green light from light-emitting diodes onto the user's skin and photodiodes measure the varying amount of light reflected. Because blood absorbs green light and reflects red light, the amounts of each type of reflected light are compared to determine heart rate. The Watch adjusts the sampling rate and LED brightness as needed.

A blood oxygen monitor was added with the Series 6 in 2020, albeit as a "wellness" device not capable of diagnosing a medical condition. The blood oxygen monitor added red LEDs to the back, allowing the watch to determine oxygen levels by measuring blood color. The Watch SE reverted to the capabilities of the Series 3, dropping the electrical sensors and blood oxygen monitor. For input, the Watch features a "digital crown" on one side which can be turned to scroll or zoom content on screen, and pressed to return to the home screen. Next to the crown is the Side Button, which can be used to display recently used apps and access Apple Pay, which is used for contactless payment.

Force Touch has since been physically removed in Watch Series 6 and Watch SE, and has been disabled via software on Watch Series 5 and earlier on models supporting watchOS 5. It has a dual-core processor, which is claimed to deliver 20% faster performance than Series 5. The apps launch quite quickly on the Series 6 and it does have a snappier feel to it. It doesn't last an entire day, the best we could get was close to 17 hours and then you just have to charge it.

What's improved is fast charging as it was one of our tiny grouse with Apple on the Watch. The Watch Series charges completely in just about 90 minutes while it recaches zero to 80% in an hour. The Apple Watch Series 6 offers a number of other health and fitness features including sleep tracking, automatic hand-washing detection, new workout types, and an overall focus on customers' well-being. The Apple watches are a popular choice among several individuals. Some of the features common to all are the built-in accelerometer, gyroscope, microphones, heart rate sensor as well as an ambient light sensor. You can compare the various Apple watches offers of this wonderful device.