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Fetch frame count with ffmpeg
...nd footer (noprint_wrappers=1). There are shorter alternatives such as -of csv=p=0.
Also see
FFprobe Documentation
FFmpeg Wiki: FFprobe Tips
mediainfo
The well known mediainfo tool can output the number of frames:
mediainfo --Output="Video;%FrameCount%" input.avi
MP4Box
For MP4/M4V/M4...
Reading large text files with streams in C#
...ovement.
Related
I came across a case where streaming a large, generated CSV file to the Response stream from an ASP.Net MVC action was very slow. Adding a BufferedStream improved performance by 100x in this instance. For more see Unbuffered Output Very Slow
...
An efficient way to transpose a file in Bash
...
Worked well with a csv of size 2 GB.
– discipulus
Nov 8 '16 at 3:10
2
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How can I access Google Sheet spreadsheets only with Javascript?
...lization API Query Language to query the data (which can return results in CSV, JSON, or HTML table format).
Forget jQuery. jQuery is only really valuable if you're traversing the DOM. Since GAS (Google Apps Scripting) doesn't use the DOM jQuery will add no value to your code. Stick to vanilla.
...
T-SQL split string
...x---------x
2. Converting to rows from a table which have an ID for each CSV row
SOURCE TABLE
x-----x--------------------------x
| Id | Value |
x-----x--------------------------x
| 1 | String1,String2,String3 |
| 2 | String4,String5,String6 |
x-----x---------...
Seeding the random number generator in Javascript
...
Antti Sykäri's algorithm is nice and short. I initially made a variation that replaced JavaScript's Math.random when you call Math.seed(s), but then Jason commented that returning the function would be better:
Math.seed = function(s)...
Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...he same output is in compare_output$comparison_df which you can write to a CSV/TEXT fule using native R functions.
– Alex Joseph
Feb 13 '19 at 11:37
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How do I get the different parts of a Flask request's url?
...s in Flask:
@app.errorhandler(404)
def not_found(e):
with open("./404.csv", "a") as f:
f.write(f'{datetime.datetime.now()},{request.__dict__}\n')
return send_file('static/images/Darknet-404-Page-Concept.png', mimetype='image/png')
...
Proper use of 'yield return'
... Another example that might be interesting is when reading rather large CSV files. You want to read each element but you also want to extract your dependency away. Yield returning an IEnumerable<> will allow you to return each row and process each row individually. No need to read a 10 Mb f...
When is a language considered a scripting language? [closed]
...
@Andrey: Chakra (IE9), TraceMonkey/JägerMonkey (Firefox), Nitro (Safari), Carakan (Opera) all compile JavaScript to bytecode and then some of the bytecode is interpreted and some compiled to native code. V8 (Chrome) skips bytecode and compiles JavaScript strai...