Time-Shift | Chrome extension 把时间从时间戳转成年月日 | Browser Plugin library

 by   lipangit JavaScript Version: Current License: No License

kandi X-RAY | Time-Shift Summary

kandi X-RAY | Time-Shift Summary

Time-Shift is a JavaScript library typically used in Plugin, Browser Plugin applications. Time-Shift has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

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              Time-Shift has a low active ecosystem.
              It has 4 star(s) with 1 fork(s). There are 1 watchers for this library.
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              It had no major release in the last 6 months.
              Time-Shift has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of Time-Shift is current.

            kandi-Quality Quality

              Time-Shift has no bugs reported.

            kandi-Security Security

              Time-Shift has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              Time-Shift does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
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              Without a license, all rights are reserved, and you cannot use the library in your applications.

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              Time-Shift releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

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            Time-Shift Key Features

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            Time-Shift Examples and Code Snippets

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            Community Discussions

            QUESTION

            HLS audio stream fails to resume play after time in background (AVPlayer refuses to buffer)
            Asked 2021-Feb-24 at 21:38

            I have an iOS app that is designed to play HLS audio stream content.

            The app supports time-shifting - you can skip backward, skip forward, scrub backward/forward, as well as pause the stream and unpause to where you left off.

            The app works fine when operating in the foreground. It also works fine when actovely playing in the background (I have the background audio entitlement set correctly).

            However, if the app is put into the background for more than a few moments (~30 seconds seems to do it) with the audio paused and either A) the user un-pauses the audio, or B) the user returns the app to the foreground and attempts to un-pause it from there, the audio does not play even after waiting a few moments. Note that the app process is not killed during this time.

            To pause and unpause, I am using AVPlayer's pause and play methods.

            While looking into it, I verified that the buffer (determined by looking at loadedTimeRanges) is filled during normal playback, but is quickly emptied shortly after the paused app is put in the background. If the app is returned to the foreground quickly enough, the buffer begins to fill again and playback can resume. Otherwise - if the user moves the app to the background for ~30 seconds - the buffer never refills at all and attempting to play again fails until the AVPlayerItem is re-configured.

            I realize that there is no guarantee that the buffer will always have content (ie. it could be emptied to minimize memory footprint, which I suspect is the case here), but would expect AVPlayer to begin to start loading audio from it again as needed when playback resumes. Even if it has been in the background for a while.

            Does anybody have an idea why this is occurring or how to work around it?

            Note: I have created a simple sample iOS 14+ Xcode project that exhibits the problem using a known HLS stream. Tap 'Configure' to load the URL, then play/pause to exhibit the issue (I added console output showing the state of loadedTimeRanges).

            https://tapestryapps.com/AudioTestbed.zip

            Thank you.

            ...

            ANSWER

            Answered 2021-Feb-09 at 23:30

            The code works for me on iOS 13.5.1 and iOS 14.4, but fails on 14.0.1. It looks like an iOS bug. You could work around this by recreating the AVPlayerItem when returning to the foreground on affected systems.

            Source https://stackoverflow.com/questions/66002392

            QUESTION

            Mix audio from various sources, regardless if an input video has sound or not
            Asked 2021-Feb-17 at 18:25

            The following code:

            ...

            ANSWER

            Answered 2021-Feb-17 at 18:25

            There is not such built-in feature. You have to check the file with ffprobe to see if it has audio, and then run the appropriate command. If you have a favorite scripting language you can automate this with an if statement.

            See Using ffprobe to check audio-only files.

            Source https://stackoverflow.com/questions/66243504

            QUESTION

            Concatenating Smooth Streaming output to a single MP4 file - problems with A/V sync. What is CodecPrivateData?
            Asked 2021-Feb-14 at 16:41

            I have a video in fragmented form which is an output of an Azure Media Services Live Event (Smooth Streaming).

            I'm trying to concatenate the segments to get a single MP4 file, however I've run into a A/V sync problem - no matter what I do (time-shifting/speeding up/slowing down/using FFmpeg filters), the audio delay is always floating. To get the output MP4 file, I tried concatenating the segments for video and audio streams (both at OS file level and with FFmpeg) and then muxing with FFmpeg.

            I've tried everything I found on the web and I'm always ending up with exactly the same result. What's important, when I play the source from the manifest file, it's all good. That made me skim through the manifest once again, and I realized there's CodecPrivateData value which I'm not using anywhere in the process. What is it? Could it somehow help solving my problem?

            ...

            ANSWER

            Answered 2021-Feb-14 at 16:41

            Mystery solved: the manifest file contains the list of stream discontinuities, which need to be taken into account when concatenating the streams.

            Source https://stackoverflow.com/questions/66181712

            QUESTION

            Gekko cspline function for FOPDT model (Dead-time) simulation
            Asked 2020-Dec-11 at 20:58

            To simulate the dead-time in the FOPDT model using the GEKKO package, I used the Gekko 'cspline' function to make the time-shifting operation smoother.
            It works well when the input changes after the length of dead-time. (eg. The input changes at t=15 when dead-time=10)

            However, when the input changes before the length of dead-time (eg. The input changes at t=5 when dead-time=10), it looks like the cspline function overly extrapolates the input value. Please give some suggestions to avoid this problem.

            ...

            ANSWER

            Answered 2020-Dec-11 at 20:58

            The cspline object is given data for the range t=0 to t=50 but it accesses values for t=-10 to t=40. The error is because of extrapolation from the cubic spline. You can generate spline data in the range t=-theta_ub to t=50 to avoid extrapolation problems.

            Source https://stackoverflow.com/questions/65256461

            QUESTION

            Data Augmentation: What proportion of training dataset needs to be augmented?
            Asked 2019-Dec-06 at 11:31

            I am currently working on a speech classification problem. I have 1000 audio files in each class and have 7 such classes. I need to augment data to achieve better accuracy. I am using librosa library for data augmentation. For every audio file, I am using the below code.

            ...

            ANSWER

            Answered 2019-Dec-06 at 11:31

            The most common way of performing augmentation is doing it to the whole dataset with a random chance for each sample to be augmented or not.

            Also in most cases, the augmentation is done during runtime.

            For example a pseudocode for your case could look like:

            Source https://stackoverflow.com/questions/59212077

            QUESTION

            Convolution integral export as animation
            Asked 2019-May-19 at 23:07

            This example is taken from a tutorial related to convolution integral.

            I would like to export this example as animation in mp4 format. So far, the code looks like this :

            ...

            ANSWER

            Answered 2019-May-14 at 14:35

            It seems that the example is wrong.

            The second argument in FuncAnimation takes a callable of which the first argument will get a new value from the 'frames' keyword argument every loop. Please take a look at the matplotlib documentation to find more information about the callable's required signature.

            I simply changed the showConvolution() arguments around so that t0 is the first argument. The range t0 is used as the desired frames argument. The lambda functions f1 and f2 are passed in a tuple in 'fargs'.

            Hope it helps you,

            Cheers,

            BdeG

            Source https://stackoverflow.com/questions/56095788

            QUESTION

            PlasticSCM: Deep compare on pending changes
            Asked 2019-Jan-09 at 17:24

            I am using PSCM6. I have 2 usecase problems (same solution) :

            • 1.) after updating server+client from V5 to V6 all my repositories are "dirty" - i.e. all files are listed in "pending changes". When I double-click a file PSCM shows "files are identical".

            • 2.) I have a Linux server which does not send the file time via FTP for some reason. I have a day-date but no time with minutes and seconds. When I transfer files from that server, my FTP client discards the date and sets the file date to the current time. Thus, all files are listed in "pending changes" again. On other servers I have to set a time-shift due to different time-zones. If I forget that, I have the same problem - the files are marked as changed.

            My question:

            Is it possible to run a deep scan for changes on all files which have been detected as being changed. Just comparing the date and giving no option for further change detection feels a bit clumsy to me - even if it is theoretically correct - because 2 files with the same content but different time stamps might be correctly treated as different files. But from a programmer point of view they are identical.

            These are my "pending changes options" settings:

            ...

            ANSWER

            Answered 2019-Jan-09 at 17:24

            Plastic SCM has a preference to "Check content (hash) when the file timestamp is modified to set it as changed". The preference is not in the "Pending Changes" view options. But in the GUI --> Preferences --> Other options.

            Source https://stackoverflow.com/questions/54088432

            QUESTION

            Interesting results from LSTM RNN : lagged results for train and validation data
            Asked 2018-Nov-28 at 14:18

            As an introduction to RNN/LSTM (stateless) I'm training a model with sequences of 200 days of previous data (X), including things like daily price change, daily volume change, etc and for the labels/Y I have the % price change from current price to that in 4 months. Basically I want to estimate the market direction, not to be 100% accurate. But I'm getting some odd results...

            When I then test my model with the training data, I notice the output from the model is a perfect fit when compared to the actual data, it just lags by exactly 4 months:

            When I shift the data by 4 months, you can see it's a perfect fit.

            I can obviously understand why the training data would be a very close fit as it has seen it all during training - but why the 4 months lag?

            It does the same thing with the validation data (note the area I highlighted with the red box for future reference):

            Time-shifted:

            It's not as close-fitting as the training data, as you'd expect, but still too close for my liking - I just don't think it can be this accurate (see the little blip in the red rectangle as an example). I think the model is acting as a naive predictor, I just can't work out how/why it's possibly doing it.

            To generate this output from the validation data, I input a sequence of 200 timesteps, but there's nothing in the data sequence that says what the %price change will be in 4 months - it's entirely disconnected, so how is it so accurate? The 4-month lag is obviously another indicator that something's not right here, I don't know how to explain that, but I suspect the two are linked.

            ...

            ANSWER

            Answered 2018-Nov-10 at 00:29

            Okay, I realised my error; the way I was using the model to generate the forecast line was naive. For every date in the graph above, I was getting an output from the model, and then apply the forecasted % change to the actual price for that date - that would give predicted price in 4 months' time.

            Given the markets usually only move within a margin of 0-3% (plus or minus) over a 4 month period, that would mean my forecasts was always going to closely mirror the current price, just with a 4 month lag.

            So at every date the predicted output was being re-based, so the model line would never deviate far from the actual; it'd be the same, but within a margin of 0-3% (plus or minus).

            Really, the graph isn't important, and it doesn't reflect the way I'll use the output anyway, so I'm going to ditch trying to get a visual representation, and concentrate on trying to find different metrics that lower the validation loss.

            Source https://stackoverflow.com/questions/53199099

            QUESTION

            Matlab: fourier coefficients of sign() function are oscillating
            Asked 2018-Sep-13 at 19:43

            I'm writing a function that takes in a time-varying signal and returns the FFT. It follows the Matlab documentation:

            It works well for really simple sums of sinusoids.

            For other simulated signals, like step functions, I end up with something fubar, that oscillates in a sawtooth-like fashion. Here is a minimal example using a heaviside step function, that plots the imaginary component of the FFT weight:

            ...

            ANSWER

            Answered 2018-Sep-13 at 19:27

            There are two problems with your code:

            1. The DFT (the FFT algorithm computes the DFT) takes the origin to be at the leftmost bin. Creating yvals such that the origin is in the middle causes the output Frequency spectrum to be that of a signal shifted by half its length. This leads to very high frequency oscillations. The fix is to use ifftshift on the input data before calling fft. See more in this other question

            2. The DFT assumes (can be interpreted as assuming) that the input signal is periodic. This leads to a second large jump. Basically, your signal looks like a shifted box function, and hence your transform looks like a sinc function with modified phase. The solution is to apply a windowing function to your input before calling fft. See for example this other question.

            Modify your code as follows:

            Source https://stackoverflow.com/questions/52318628

            QUESTION

            Is it possible to use something like `tz=NULL`?... `as.POSIXct` defaults to locale-dependent timezone (unlike `as.Date`), which causes issues
            Asked 2018-Jul-09 at 01:53

            I know this is a long-standing, deeply embedded issue, but it's something I come up against so regularly, and that I see beginners to R struggle with so regularly, that I'd love to have a satisfactory solution. My google and SO searches have come up empty so far, but please point me in the right direction if this is duplicated elsewhere.

            TL;DR: Is there a way to use something like the POSIXct class without a timezone? I generally use tz="UTC" regardless of the actual timezone of the dataset, but it's a messy hack IMO, and I don't particularly like it. What I want is something like tz=NULL, which would behave the same way as UTC, but without actually adding "UTC" as a tzone attribute.

            The problem

            I'll start with an example (there are plenty) of typical timezone issues. Creating an object with POSIXct values:

            ...

            ANSWER

            Answered 2018-Jul-07 at 04:53

            I'm not sure I understand your issue. Having (re-)read your post and ensuing comments, I see your point.

            To summarise:

            as.POSIXct determines tz from your system. as.Date has default tz = "UTC" for class POSIXct. So unless you're in tz = "UTC", dates may change; the solution is to use tz with Date, or to change the behaviour of as.Date.POSIXct (see update below).

            Case 1

            If you don't specify an explicit tz with as.POSIXct, you can simply specify tz = "" with as.Date to enforce a system-specific timezone.

            Source https://stackoverflow.com/questions/51201099

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

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            You can download it from GitHub.

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