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Closed 11 years ago.
I want use OpenCV and Portaudio to record video and then inject audio tracks into the Video file. Resources on this are extremely scarce, could anyone please offer some guidance?
To start, check:
How to write a video file with OpenCV?
PortAudio Wiki, which has a great tutorial on how to capture audio.
I don't think PortAudio is able to deal with video files, so don't expect to inject the captured audio directly into the video file created by OpenCV.
However, if you are allowed to use something else, I would certainly take a look at FFmpeg since it can accomplish both tasks, on the cmd-line. Of course, you can also use the ffmpeg's API to write an application to do that. And if you still need to throw OpenCV in the middle of this, in this answer I showed how to convert an FFmpeg frame to an OpenCV Mat.
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Closed 10 years ago.
I know that I need to know at least C and Assembly. In your own opinion what else does one need to know apart from knowing how to program in C and Assembly efficiently? Are there any books you can suggest to get me started? I also read that you need to know about the hardware architecture of the platform you are emulating. Would you also recommend the books listed here?
For experts only
You would have to know all the inner workings and hardware details of PSP, which are business secrets of Sony and therefore not published. The way most emulators are made is reverse engineering, a process in which the device itself is disassembled and its inner workings are studied. That includes analyzing the chips thoroughly, reading the contents of ROM chips and sometimes even deciphering encrypted data. Full analysis usually requires specialized equipment and years of engineering experience.
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Closed 10 years ago.
My question is exactly as is mentioned above. I have a set of files names 1.mp3, 2.mp3 and so on that I have to convert to mono .wav files. I know how to do this in audacity. But is there any faster way to possibly achieve this??
It depends on which platform you use(i.e., Windows, OSX, Linux).
Assuming Windows, you can use this: http://www.softpedia.com/get/Multimedia/Audio/Audio-Convertors/Free-WAV-MP3-Converter.shtml
Don't install any of the extra stuff. Be forewarned - converting from MP3 to WAV is going from a lossy compression to a lossless one, and won't sound that great.
Online you can do them one by one with:
http://www.zamzar.com/
or any of a million other online file conversion sites. This will necessarily be just as slow as using audacity.
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Closed 10 years ago.
I want to write a simple applet to put in a tray. Let's say it will be for gnome taskbar or tint2. My applet should show system temperature or any other simple information by probing at a fixed amount of time /proc or maybe providing this info by clicking on the applet itself, I still have not decided.
My knowledge is limited, since I don't know where to start. What I need is some little info, on the difficulty of the matter, provided I'm fairly ok with bash, but that's it.
Where do I start and what should I read first? There should be gui, then is it gtk, qt or something else? Maybe somebody got a good link or just your opinion will be a good start for me.
Assuming you mean GNOME 2, you could start reading the document Gnome applets with Python. You will get the idea behind applets and how to do it with Python. For tin2 the API might be totally different.
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Closed 10 years ago.
I want to capture live video streams to .mp4 file. I have downloaded H264 DS Filter from http://hax264.sourceforge.net/. I want to generate Graph using GraphEdit utility of DirectShow. Can anyone please help me to achieve this?
Thank you.
It's not possible with the link you posted:
HAX264 is a DirectShow Video Transform Filter for decoding H264(AVC) video
You can try the x264 DirectShow filter from Monogram or our open source H264 DirectShow source filter that implements limited parts of the H.264 specification.
You may also want to take a look at Geraint Davies' mp4 mux.
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 10 years ago.
How to send MMS in J2ME?
See JSR 205.
Here's a sample code at Java Tips.
Obviously the handset and service provider have to support MMS...
Last link, a more descriptive piece on J2ME MMS.
Martin Clayton's answer is correct except it's actually JSR 205 you need for MMS.
As with all good things in Java Mobile remember to test on your target handsets, some over achieving device manufacturers have limited the payload to a max size of 32kb, which you might find tricky if you are sending images or video