video-encoding

Video iphone question - 720p on iphone 3g/3gs?

Hi there. This may be a ridiculous question - but I know nothing about videos, video files or playback. If I have videos in 720p format (high definition) will they play normally on an iphone 3g/3gs which doesn't support high def? Or will I have to have 2 different videos and test the device? Thanks Tom ...

AS3 Video Encoding at runtime with high compression (H.264?)

I need to compress video image data (lets say a display object) in AS3 to a Byte Array with high compression at runtime. Framerate only needs to be around 5 but 1024x768 video needs to go to < 40 Kilobyte per Second without the quality beeing tooo bad. I wrote a custom encoder and got it to around 80-100 Kilobyte per Second for 1024*768 ...

Can I use Xuggler to encode video/audio to a byte array?

It seems all methods expect either files or urls. I see some methods that work with OutputStream, but I haven't managed to open an IContainer using one of those methods; I always get an invalid return value. ...

Multiple Streams in Video File

I'm looking for a cross-platform C/C++ library for creating and reading video files with multiple internal streams. My current implementation uses the WIN32 VfW interface for creating an AVI video file with an additional TEXT stream. This TEXT stream can store any binary data. However, VfW is an old API, not supported by newer codec, and...

Is there something wrong with my video code?

<div id="div1" style="position: absolute; top: 0px; left: 0px;"> <video width="320" height="240" controls="controls"> <source src="C:\Users\Trent Terrill\Desktop\Website Stuff\Media\video.ogg" type="video/ogg"/> Your browser does not support the video tag. </video> </div> It won't work in any browser. ...

Watermark a video programmatically

So I am looking for a way to watermark videos uploaded to my site programmatically. I have looked at ffmpeg-php however this will not work as I am using shared linux hosting. I'm wondering if anyone knows of a way that I can programmatically add a watermark to mp4 videos kind of how you do with the GD lib in php. Has anyone successful...

How to make a video from images with timestamps?

I have a bunch of images grabbed in real-time from an experiment. Each image has also a timestamp of when it was produced/measured/generated. I would like to make a video from those images. The problem is that framerate is not really static as some images took longer to make. So I am searching for a way to make those images into a video ...

screenshots sequence to compressed video

hi, I'm trying to accomplish relativly simple task: capture screenshot every N sec to bitmaps array in memmory encode bitmaps video to Windows Media Video 9 Screen Encoder format , and put it in another place in memory by now i did the first part , but second is little trickier. i did this: initialize COM for DMO with CoInitia...

video in format .dwz to other formats

hi all, how I can convert a video .dwz a to format comertial(avi,mp4 etc) or how I can watch it?. Thanks for your answers ...

ffmpeg (libavcodec) warning: encoded frame too large

Hi, I'm trying to use libavcodec (ffmpeg) to encode raw pixel data to mp4 format. Every thing goes well and I'm getting .avi file with decent quality but some times the codec gives "encoded frame too large" warning. And when ever it does that, a part of some frames (usually bottom portion of the frame) look garbled or all mixed up. Can ...

How does Google Video allow for slow motion and fast motion?

I have been searching far and wide for a solution on how to offer slow motion and fast motion options for users that upload video to my webstie. There is an implementation on Google Video that has exactly what I am looking for: the option to speed up or slow down the video and continue to play the audio. The screenshot is below. I know...

ffmpeg conversion command to output to h.264 for iPad

I'm looking for a good (general) conversion command that will convert any input file to h.264 sized for the iPad. Currently I have this command that works, that was adapted from robert.swain With presets: /Applications/Miro.app/Contents/Helpers/ffmpeg -i INPUT -acodec aac -ab 160000 -s 1024x768 -vcodec libx264 -vpre slow -vpre ipod64...

Video encoding for websites

Hello, I am a little new to embedding videos on a website. What is the best way to go about it? I just started reading up on it. I read that I should use HTML5 and the browser's native player. -- Does anyone know of a javascript library that will use the browser's player and detect if the browser is not using HTML5 to downgrade to a f...

Using FFMpeg to determine video-type, converting afterwards?

Hello, I'm trying to determine the real type of a file programmatically. It seems I have to use for example FFMPeg for that. I want to determine if an uploaded file is in fact a MP4 or FLV (for flash videos) [or WebM (for HTML5)]. I know the -i operator in FFMPeg but I don't know what to check for. For example: Input #0, flv, from ...

what video/image encoding format is recommended when trying to encode and transmit raw video in real time ?

Hi, I'm trying to encode and transfer raw video frames over LAN (100 Mbps) connection (frames captured by a web cam). What video/image encoding format is recommended for fast compression (with not much regard for the compression ratio) ? Thanks, ...

HandBrakeCLI and CoreAudio

Hey! Could you tell me how to use HandbrakeCLI with coreaudio? Found this unapplied patch http://trac.handbrake.fr/wiki/UnappliedPatches#coreAudio but dont know how to build it myself on osx-snowleopard.. Can you help me? ...