superfast | : zap : SuperFast codecs for fre : ac | Audio Utils library
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:zap: SuperFast codecs for fre:ac
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QUESTION
Having this dataframe:
...ANSWER
Answered 2020-Sep-30 at 16:06Let's use cumsum
to identify the blocks and groupby on that:
QUESTION
In numpy, I can use the code
...ANSWER
Answered 2020-Jun-30 at 10:46Approach #1
For N
>> n
, we can use an iterative method with masking, so that at each iteration we pick one not-previously picked element per row. The implementation would look something like this -
QUESTION
Here's the part of my file which's about the FFMPEG string.
...ANSWER
Answered 2020-Jun-02 at 17:01ffmpeg -i file -i logo.png -filter_complex "[0]scale[bg];[bg][1]overlay=10:102[v]" -map "[v]" -map 0:a? … output
QUESTION
So far I tried using pystun, but following the manual:
...ANSWER
Answered 2018-Sep-18 at 15:14It probably is a problem with python
versions, the original code of pystun
using 2.x
and you using 3.x
.
Looking at the source code line where error originates, we can see that it calls the dictionaries .items()
method and tries to access its members by position.
Here is the problem:
- In
python 2.x
,dict.items()
returns a list of tuples. - In
python 3.x
,dict.items()
returns a view, which cannot be accessed by position, only iterated over.
Short answer: you cannot use the pystun
repo with python 3.x
; maybe some patching can be done, or you can just copy and modify the source code yourself instead of relying on the external repo.
QUESTION
I'm implementing a PNG encoder in VHDL for learning purposes. It works with image sizes from 1x1 to 4x4. At the image size of 5x5 there is a behaviour I can't understand:
When encoding raw data with values 0...24, the encoding works. However, when using raw data with values 255...231, it generates a broken image.
Input values 0...24:
...ANSWER
Answered 2020-Apr-26 at 10:47It was an overflow in the ADLER32 checksum calculation. Specifically, there were two 16 bit numbers added and truncated before applying the modulo with 65521. Unfortunately my ADLER32 unittest didn't catch it, yet.
However, the error message was shown several times during the implementation and I was always not sure about the cause. If anybody could elaborate the error message or explain how to get a better error message, I would be glad to hear it.
QUESTION
I need superfast response from MySQL, so I am trying to handle this by direct connection to MySQL:
...ANSWER
Answered 2020-Feb-25 at 14:04One thing you're missing in your call to subprocess.Popen()
is stdin=subprocess.PIPE
. From the docs:
Note that if you want to send data to the process’s stdin, you need to create the Popen object with stdin=PIPE.
QUESTION
x264-preset
is used in the second command (Cmd 2
). Is it substitution or?
Cmd 1:
...ANSWER
Answered 2020-Feb-24 at 20:46It appears that you are trying to execute the contents of a custom preset file. To run it as a normal command:
QUESTION
I need to add multiple gif files as overlay to video. Overlay works but Rotating each Gif is not working somehow.
command
...ANSWER
Answered 2020-Jan-24 at 20:40You have some errant semicolons which should give you an error message:
QUESTION
There is a bash/batch file script:
...ANSWER
Answered 2020-Jan-16 at 20:36Please, pay attention to some points below:
- So, if I really understand your question, and it is about batch file/cmd in Windows, you would need to put the path to
ffmpeg.exe
in a variable, so it can be accessible toyoutube-dl
found it. - Or, in my sample above, in same path and in variable argument tool, so, youtube-dl amd
ffmepg.exe
are in same folder/path =.\\
. - The link in this question, is offline, so I changed this link to an another online:
I’ll save this code by name yt-DL.cmd
Copy only a specific time by: Only edit _tag_1
value: -t 00:60:00
QUESTION
I'm fetching relational data from my sql database. This data has an identifier (unique/primary key). Sample:
...ANSWER
Answered 2020-Jan-07 at 13:26However, I disagree with this approach. I don't see why you would search for an identifier, as you could just simply access the element directly via id, which really is the idea to use an identifier.
You can't directly access by ID with the structure you've shown. You need a different structure to do that.
As result, I currently "misuse" the index of the array as identifier number to access the elements directly. Sample:
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