Advanced software for Mac OS X.
Video
1. It is possible to re-compress an already compressed file?
Yes it is possible (H.264, DivX, Xvid, mp4 etc.) Default procedure: select quality compression between medium and medium-high then set all other parameters on automatic. Normally the reduction results are considerable even for example on old black & white movies.
2. Why sometimes the weight of a file increases instead of diminishing?
This situation could occur with films that have already been compressed originally. For example: when taking in consideration videos settings with high quality parameters (Max quality) it is preferable to set everything on automatic and then select a medium compression quality.
3. Is JPDM a standard?
No, JPDMovie is a pre-filter that operates on the entry data before the actual compression. This action of data buffer adjustment has the sole scope of modifying the “quantitization” of space colour in order to allow the compressor to operate with more efficiency.
4. Is JPDM a format?
No, the container of the final compression carried out with JPDM pre-filter could be any kind of format. In this specific case we have opted for the .mov container.
5. Is the batch to compress or recompress multiple films available in KandalLite?
KandaluLite’s architecture allows this function that will be implemented in the next upcoming versions.
6. Is it possible to compress without loss of data (Lossless) in order to achieve a better editing?
It is possible and many codec are dedicated to such operation. KandaluLite will implement such operation with a new codec released in the upcoming releases. The lossless codec, CPDMovie (CPDM) will implement the technology already utilised in the photo compression with the CDP format.
7. Which settings are recommended?
The fundamental setting is the quality selection function: max, high, medium, low. Our suggestion is the one not to go under a medium quantitization. All other parameters need some experience, therefore in order to not incur in errors it is preferable to set up automatically.
Photo
1. Is it possible to set the JPD Lossy compression as in JPG?
The JPD possible settings are as follows:
A) (Dark Parameter- space colour possible compression settings: With the highest value (65535) there is no compression the default value (20840) corresponds to a medium compression With a value of 5/6000 or lower, there is a high compression and some artefacts could occur. The most evident being the pixelization and the and/or other artefact..
B) Sub-sampling settings: Ex: (1:1, 1:1, 1:1 or 2:2, 1:1, 1:1) when sub-sampling is one to one the quality is at the maximum level the default suggested setting is 2:2,1:1,1:1
C) smooth enabling for error distribution
D) scaling function for very high compressions The scaling function enables you to reduce the image geometry decreasing the image on the axis X and Y for a compression, hence automatically enlarging when decompressing. Note: when using this function in the decompression stage the image seems out of focus due to the process of information extrapolation. This parameter should be used only in extreme particular occasions.
2. is it possible to recompress the PNG format?
If it’s the case of a photo (without the transparency alpha channel) it is possible. In this case CPD recompresses saving all the information but reducing the weight even further.
3. Is it possible to recompress the JPG format?
Yes you can if the saved JPG image has still a certain residual quality. For example many JPG images executed with cameras are usually above 1Mb (in order to preserve the residual quality). In this case JPD can still operate with good performance, hence reducing even further the weight.