For bandwidth reasons I would like to use Apple's implementation of the IMA4 format available for recording on the iPhone. This format is great for space, but it seems to be hard to find any programs that can transcode it into something like linear PCM or MP3. I've tried sox and Transcode to no avail. I need to be able to do this automat...
Hi! Excuse for my English I need to import the .mov file using the AVID codec. In AVID Composer program in import settings it is possible to customise Colour Levels by installation of options RGB (0-255) or 601 (16-235). How it is possible to set in a code this option (601)? I tried to set her when setting session: long lwidth;...
In AVID Composer program in import settings it is possible to customise Colour Levels by installation of options RGB (0-255) or 601 (16-235). How I can call this dialog to configure import settings using quicktime? ...
Has anyone worked on capturing screen to video stream (to store in local file or send to network)? I understand how it can be done, and have several test solutions working - but we have trouble achieving decent performance. We need to capture about 4 megapixels screen space of changing text and vector graphics, on a computer where CPU ...
Most video codecs are optimized for movies. However, not all videos look like real-world movies, and usual codecs do not aways give good results. So are there methods specifically designed for cartoons/animated screen captures? Are there any open-source implementation? ...
I am a little confused. I have a piece of hardware that feeds me n frames per second. I would like to add support to my program to compress these on the fly into a silverlight streaming compatible format. I guess in general I'm asking, how do you use a codec from something like .net, so I receive raw frames and output an encoded format?...
I have an application that generates some large log files > 500MB. I have written some utilities in Python that allows me to quickly browse the log file and find data of interest. But I now get some datasets where the file is too big to load it all into memory. I thus want to scan the document once, build an index and then only load th...
Hi everyone; I'm messed up with codec issue for days, and still couldn't see the big picture yet. It is my first time do deal with audio/video formats and codecs. So I really need some help about that. Here is the work. I'm writing several components that is responsible for encoding and decoding customized mpeg files. On top of standar...
When encoding and streaming audio with Windows Media Encoder 9 (with WMA 10 Professional codecs installed), there seems to be a minimum audio latency of ~2 seconds, even when using the Low Delay CBR configurations. Are there any codecs out there that can be installed into Windows Media Encoder and that would encode to mp4a with a reduce...
We have setup a Flash program to record video/audio to a Flash Media Server, but have noticed that the audio packets are dropping out. We are using the Nellymoser codec and after looking at the recorded FLV, there is on occasion an audio packet that is set to Format: Uncompressed - PCM_BE Channel: mono SampleSize: 8-bit SampleRate: ...
The title already says all: I want to create a project using DirectShow. Which license does DirectShow have? Can I just use it or do I have to mind sth.? What input and output-codecs can DirectShow handle? ...
I am exporting UTF-8 text from Excel and I want to read and parse the incoming data using Python. I've read all the online info so I've already tried this, for example: txtFile = codecs.open( 'halout.txt', 'r', 'utf-8' ) for line in txtFile: print repr( line ) The error I am getting is: UnicodeDecodeError: 'utf8' codec can't dec...
I need to create my own codec, i.e. subclass of QTextCodec. And I'd like to use it via QTextCodec::codecForName("myname"); However, just subclass is not enough. QTextCodec::availableCodecs() does not contain my codec name. QTextCodec documentation does not cover the area of proper registration of a custom codec: Creating Your Own Co...
I currently use the AudioTrack and AudioRecord classes in Android. I use the pure PCM data but I was wondering what my options are for other codecs? From this page it seems I can only encode and decode using AMR narrowband? I currently set up the Audio classes as follows: arec = new AudioRecord(MediaRecorder.AudioSource.MIC, ...
Hi, If its not relevant here, pls. move to correct place. I want to find out which all vendors/companies have developed multi-threaded video codecs(decoders , encoders) as commercial products? Not opensource solutions like libavcodec/x264/ffdshow etc... but commercial solutions for which one can obtain licenses/performance numbers of t...
Which audio codec should I choose for my C# software development project where the raw audio to be transcoded/transported/used is based on the following: For encoding Speech only Audio can be stereo or mono Able to support live streaming Good tradeoff between file size and quality To be transported over TCP/IP in its encoded form Can b...
Hi, I am very much confused to know what happens inside the codecs. I want to learn about the elements inside audio encoders and decoders. Would be very happy if you can provide me some links where i can find some good study material. Thanks precisely i would like to know how the codec parses the a media file. ...
I've got a Python program that stores and writes data to a file. The data is raw binary data, stored internally as str. I'm writing it out through a utf-8 codec. However, I get UnicodeDecodeError: 'charmap' codec can't decode byte 0x8d in position 25: character maps to <undefined> in the cp1252.py file. This looks to me like Python i...
I need to develop an embedded audio streaming server. Requirements: Voice quality or better Intended for low power wifi transmission Broad support in existing software and devices (ie, windows media player, quicktime, vlc, iPhone, Android, etc). Royalty/patent free, or cheap to license Preferences: Low overhead TCP/IP based stre...
Hi there, I'm trying to run the following Xuggle code: public static boolean convert(String stream) throws IOException, InterruptedException { IMediaReader reader = ToolFactory.makeReader(stream + ".flv"); IMediaWriter writer = ToolFactory.makeWriter(stream + ".mp3", reader); reader.addListener(writer); while (reader.readPac...