Archive for the ‘java’ Category
Batch converting videos to play on the Nexus 7 using FFMPEG
How to batch convert videos to play on the Nexus 7 using FFMPEG in Python.
mypath = r'path_to_video_files'
from os import listdir
from os.path import isfile, join
onlyfiles = [ f for f in listdir(mypath) if isfile(join(mypath,f)) ]
for file in onlyfiles:
infile = '"' + mypath + file + '"'
outfile = '"' + mypath + file + '.mp4' + '"'
ffmpegpath = r'ffmpeg.exe'
cmd = r' -i ' + infile + ' -acodec libmp3lame -vcodec libx264 -aspect 16:9 -s 800x480 -ab 128k -b 512k -f mp4 -strict experimental ' + outfile
import os
os.system(ffmpegpath + cmd)
Starting source:
Passing a datastructure between Android activities as JSON
Passing a data structure between Android activities as JSON using Gson.
In the sending Activity:
//Data
Droplet data = new Droplet();
//Create intent
Intent intent = new Intent(SendingClass.this, ReceivingClass.class);
//Create JSON object from data structure
Gson gson = new Gson();
String json = gson.toJson(data);
//Add JSON to intent
intent.putExtra("json", json);
//Start Activity with intent
startActivity(intent);
In the receiving Activity:
//Get string
String json = extras.getString("json","-1");
//Convert JSON to class
Gson gson = new Gson();
Droplet droplet = gson.fromJson(json, Droplet.class);
Where Droplet is defined here.
Getting a JSON object from DigitalOcean in Java
How to get a JSON object from DigitalOcean. This uses Gson.
Getting the HTTP object.
Inputs:
url: URL to access i.e. https://api.digitalocean.com/v2/droplets/
auth_key: Authorization key from DO.
import com.google.gson.Gson;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
private static InputStream retrieveStream(String url, String auth_key) {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet getRequest = new HttpGet(url);
getRequest.addHeader("Authorization","Bearer " + auth_key);
try {
HttpResponse getResponse = client.execute(getRequest);
statusCode = getResponse.getStatusLine().getStatusCode();
HttpEntity getResponseEntity = getResponse.getEntity();
return getResponseEntity.getContent();
}
catch (IOException e) {
getRequest.abort();
}
return null;
}
Converting the response into a Java object:
InputStream stream = retrieveStream(url, auth_key);
Reader reader = new InputStreamReader(stream);
Gson gson = new Gson();
Droplets response = gson.fromJson(reader, Droplets.class);
Where Droplets.class is implemented like this and Droplet.class is implemented like this.
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