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Nolan Richardson
Nolan Richardson

Completely Random Video.mp4



Cool, so now we can use the same principle to make the sample dataset.We suggest trying out iterable dataset for this purpose.Here, we are going to build an example dataset that reads randomly selected 10 frames of video.




Completely random video.mp4



Each dataset starts by taking a list of video paths and labels in some form. For example, Kinetics can take a file with each row containing a video path and label, or a directory containing a \/\.mp4 like file structure. Each respective dataset documents the exact structure it expected for the given data path.


At each iteration a video sampler is used to determine which video-label pair is going to be sampled from the list of videos from the previous point. For some datasets this is required to be a random sampler, others reuse the torch.utils.data.Sampler interface for more flexibility.


A clip sampler is then used to determine which frames to sample from the selected video. For example, your application may want to sample 2 second clips at random for the selected video at each iteration. Some datasets like Kinetics make the most of the pytorchvideo.data.clip_sampling interface to provide flexibility on how to define these clips. Other datasets simply require you to specify an enum for common clip sampling configurations.


This issue is at least 4 years old. I'm using Camtasia and rendering all videos with a Baseline profile and identical settings. Storyline allows some of them to have a 'none' compression setting and other are forced into automatic. It seems completely random.


The shorter the GOP length, the fewer B and P frames exist between I frames. Remember that B and P frames offer us the most efficient compression, so in a lower bitrate movie, a short GOP length will result in poorer video quality. A longer GOP length will compress the content more efficiently, providing higher video quality at lower bit rates, but at the expense of trading off random access points and error resiliency. Most encodes typically use GOP lengths in the 1-2 second range.


In reinforcement learning, the goal of the agent is to produce smarter and smarter actions over time. It does so with a policy. In deep reinforcement learning, this policy is represented with a neural network. Let's first interact with the gym environment without a neural network or machine learning algorithm of any kind. Instead we'll start with random movement (left or right). This is just to understand the mechanisms.


The previous section of the tutorial had our agent make random actions disregarding the observations and rewards from the environment. The goal of having an agent is to produce smarter and smarter actions over time and random actions don't accomplish that. To make an agent make smarter actions over time, itl needs a better policy. In deep reinforcement learning, the policy is represented with a neural network.


Specifying num_samples=5 means that you will get five random samples for the learning rate. For each of those, there are two values for the size of the hidden layer, and two values for the activation function. So, there will be 5 * 2 * 2 = 20 trials, shown with their statuses in the output of the cell as the calculation runs.


I created 10 trials with two conditions, each condition plays a different movie (optic flow or random flow). I loaded the mp4 movies with the function visual.MovieStim3 and displayed the movies in my trials loop with the function movie.draw(). Since I have 10 trials, the videos should be shown randomly 10 times, but instead, the code is only displaying the first two videos in a loop of 10 trials. After showing a second video, the window stays black for some second then closes. There is no error thrown.


I added the lines optic_flow_movie.seek(0) and random_flow_movie.seek(0) following the answer to my question on StackOverflow provided by @Michael, and it worked on my Linux machine that had the Python Version (3.6.4) and the PsychoPy Version (3.2.0).


All of my clips are in folders like f:\creations\twitch clips 20210829-20210904\exports. What this script below, which I calledget-clips.ps1, does is search all of the directories underf:\creations and looks for files that end in *.mp4. Thosedirectories also contain longer highlight videos so I exclude filesthat start with highlights from the results. The list is then savedin a file named clips.txt. You can adjust this for your organizationscheme by changing the file paths in the script.


Figure 4 gives you an idea of how this works. We need to modify our HTTP server so that rather than streaming the entire video file to the frontend, we can instead serve random access portions of the file depending on what the browser is requesting.


When editing videos in FCPX random clips will turn black. All my clips are recorded with the same camera, saved to the same SD Card, and imported the same way, yet only some clips black out during editing. The clips also play fine when I open them through QuickTime or any other video playing software... all other forums relating to this issue seem to be years old and outdated.


The free plan lets you use random tools for personal use only. Upgrade to the premium plan to use random tools for commercial purposes. Additionally, these features will be unlocked when you upgrade:


Distance controls the range from which a random point will be picked. Lower values mean the playhead will only make short jumps, resulting in a subtle glitchy look. Higher values mean it will jump across the whole timeline, resulting in more abrupt jump cuts.


MP4(short for MPEG-4 Part 14) is a file format based on ISO/IEC 14496-12:2004 that is based on QuickTime File Format but formally specifies support for Initial Object Descriptors (IOD) and other MPEG features. It is mostly used to store video and audio but can also be used to store subtitles and still images. MP4 files are stored with the .mp4 extension. MP4 is an international audio-visual coding standard. Similar to most modern container formats, MP4 supports streaming over the internet. Due to the high compression used in MP4, the resultant files are smaller in size with almost all the original quality retained.


MP4 is an extensible container file, meaning that it does not define a strict structure and allows custom structure and hierarchy for each media type. The data in the MP4 file is divided into two sections, the first containing the media-related data and the second containing metadata. The media data contains audio or video and metadata indicate flags for random access, timestamps, etc.The structures in MP4 are typically referred to as atoms or boxes. The minimum size of an atom is 8 bytes(the first 4 bytes specify size and the next 4 bytes specify type). Here is a list of the root level atoms contained in MP files:


This array of slide IDs is then shuffled like a deck of cards using a randomise function. Finally, the randomised array is used to create a custom slide show that is then set to run. And the really cool bit is that every time the macro is run, you get a different slide order.


This is how the macro creates the random order slide show but how does it actually run it? Close the windows above and back in the PowerPoint Slide Show tab click the Set up Slide Show button. This opens up the settings for your slide show:


Hi S Mason. Are you running the macro each time or just running the slide show? Once the VBA code is in your file you should be able to close the VBE and run it by pressing Alt+F8 which creates a new random order and starts the slide show.


Hi Jamie, Your code is inspirational. I am developing randomized slides with powerpoint 2016. My presentation has multiple questions on each page and require answers from my students. I have two questions. 1.) Once I get this up and running I will like to have it on a webpage. What do I have to do to achieve this? 2.) Currently, I have the presentation saved as pptm.


What I want is to be able to create short PowerPoints (3 to 10 slides each). Create multiple Power Points and make a list of the PowerPoints. Then have the PowerPoint presentations run in random order on a continuous loop.


5 years in front-end developer, iOS is 90% of the bugs I encounter, and it's at least 2 years behind in major feature release (some may never see the light of day, like smooth-scroll behavior). Today I noticed I can't lazyload a video using a template tag for iOS 14 and under (autoplay won't work then - and iOS 14 is still used a lot). So I removed the template tag, but now the video first frame don't display well (white flickering while the video auto resize itself). I tried a lot of things, including some random tricks that did dome things (like the background:white, but I'm not there yet). It's in a standard horizontal media gallery, nothing fancy...


If you recently have lost some video files to corruption, you would be completely familiar with the fact that it may turn out to be a highly frustrating experience. So why risk going through again when you can prevent it? A few tips that might come in handy. They would help you detect an issue with your videos and what measures you can take to prevent any damage.


There is a national epidemic of random stabbing happening now and it is all over the country. In recent days here in Vegas, 7 people were stabbed on the strip [2 died], 2 people were stabbed near the Univ [2 died] and a cop was shot and killed near the Univ. and people in Nevada keep posting the SOS about BS on social media and act like this killing is not even happening. All of this happened close to my apartment and I LIVE IN A WAR ZONE NOW and so do you.


"fileDirectory" can be made a single file, or a folder. If you want to play all the videos in a folder, put something like $HOME/Videos/* You can also limit it to a specific file format by putting that format after the asterisk. (ex:*.mp4) The -shuffle tag can also be applied to make the videos play in a random order. 041b061a72


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