Daala Quickstart Windows
Getting Started Windows
This is a simple guide to getting the code and encoding a simple video.
- Visual Studio 2008 or Visual Studio 2010
- libogg (v1.3 or later)
The solution files were created using Visual Studio (VS) 2008 Team System and Visual Studio 2010 Ultimate, even though the provided solutions might work with the express versions of VS this has not been tested.
The soultion files were tested with libogg 1.3.2; this can be downloaded from this link downloads.xiph.org
- Clone Daala repository
git clone https://git.xiph.org/daala.git
Note that the git clone can take several minutes to complete.
- Unpack libogg into a folder named "ogg" without the quotes.
If you cloned Daala repository into a folder named Daala in the root of your C drive, your folder structure should look like this:
Make sure you run the git clone operation on the same machine where you intend to use the code. Checking out a copy on Windows and then trying to use it on Linux will not work, as executable permissions and line-endings will not be set properly.
Building the executables
- Open the file Daala_static.sln located at \win32\Visual Studio\VSXXXX\ folder.
- Build the solution.
this will generate 3 static libraries and 2 executables:
Encoding a Video
If you do not have one, get a sample video or two in .y4m format from media.xiph.org. These videos are relatively large and will take a long time to encode. There are also subsets of 1 second long videos for faster encoding:
We also maintain a set of still-image collections in .y4m format:
- Subset 1 (50 images, small training set)
- Subset 2 (50 images, small testing set)
- Subset 3 (1000 images, large training set)
- Subset 4 (1000 images, large testing set)
Encode the video:
./examples/encoder_example -v 30 video.y4m -o video.ogv
- video.y4m is the input video you want to encode,
- video.ogv is the name of the encoded video file to output,
- -v specifies the quality (currently from 0 to 511, where 0 is lossless)
Decoding a Video
you can decode the video back to .y4m with
./examples/dump_video video.ogv -o decoded_video.y4m
Many other players can play back these .y4m files, and other tools can convert them to various other formats.
Creating y4m from other formats
You can use the ffmpeg tool to generate y4m from any of it supported video formats:
ffmpeg -i video.webm -pix_fmt yuv420p video.y4m
Note that ffmpeg is optimized for speed. You may not get repeatable results across machines.