About Introduction Support Changelog Info Using StaxRip Projects Filters Glossary Guides DVD DVB More Guides | # DVB Guide Start StaxRip and load the DVD template found under 'File/Project Templates/DVB'. Open the DVB file. StaxRip will now invoke ProjectX to demux the file. Demuxing means spliting the files into a separate audio and video files. ProjectX creates a MP2 or AC3 file containing the audio and a M2V file containing the video. Once ProjectX finishes StaxRip invokes DGIndex to index the M2V file. DGIndex creates a D2V file which is used to load the video in AviSynth. At the bottom of the main dialog the assistant gives instructions that must be followed precisely. It displays what step must be taken next and warns if incompatible settings are used. Once DGIndex has finished the assistant tells to open the crop dialog in order to crop borders if there are any. Open the crop dialog and check if StaxRip has detected all borders properly, correct the values if necessary. Click on next to see the next assistant instruction. The assistant reminds to verify the filter setup. The default filter setup has a enabled MPEG-2 source filter, a Crop filter and a resize filter. The deinterlace filter is disabled. Most DVB sources are interlaced. In order to find out if the source is interlaced uncheck the resize filter temporarily and open the preview (View/Preview (or press F5)). In the preview double-click somewhere for fullscreen and examine if the source is interlaced. If you don't know how a interlaced image looks visit www.100fps.com. Close the preview recheck the resize filter and check the deinterlace filter in case the source is interlaced. The next assistant reminder is cutting if necessary. If the video needs to be cut open the preview. How to cut is described in the help of the preview (press F1) and by the tooltips that appear when the mouse hovers over the buttons. Once cutting is done close the preview. In the main dialog the new length can now be seen. The assistant reminds to make a compressibility check. The compressibility check makes only sense for multipass encodes and multipass encodes are principally done to hit a exact file size so since there is a fixed file size and a fixed movie length which result in a fixed bitrate the only left variable is the image size. The compressibility check helps to find a ideal image size for the targeted bitrate. Movies differ greatly in compressibility, a movie with a lot action like many explosions need a much higher bitrate for the same image size. A image size around 200000 pixel (e.g. 528x384) is a good compromise. A smaller image size requires a smaller bitrate which will result in a smaller file size but a smaller image size means of course also poorer quality. A better solution then aiming for a file size is aiming for constant quality. It can be achieved by setting up the codec to use single pass quality mode encoding at a fixed quant or a similar quality metric. StaxRip offers profiles for constant quality. Since movies have a different compressibility the file size is different. Once the image size is adjusted the encoding can be started by clicking the next button.
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