Zitat
Original von Gunnar
Nur da ? Wo hast du die Info her ?
Im US-Forum gibt es schon ein paar Beiträge zu dem Thema, und eine FAQ zum PC3:
Question: Is ProCoder 3 faster than ProCoder 2.0?
Answer: While small optimizations have been worked into the ProCoder conversion engine, the software at large remains the same in terms of speed. The exception to this is the inclusion of Grid Encoding technology, which on the right system, will allow you to encode certain MPEG-2 target files much faster, due to multi-core CPU technology.
Question: What are the limitations/"gotchas" with the Grid Encoder tech?
Answer:
It only provides a benefit to systems that have the newer multi-core CPUs (e.g. Intel Core 2 Duo)
It only works for MPEG-2. Other formats such as Windows Media, QuickTime, H.264, DV, etc. remain unaffected
You need to choose the correct target formats to ensure the technology is activated (see the post in the Known Issues/Workarounds section)
Grid Encoding can only create MPEG-2 content for HDV-1, HDV-2, SD NTSC, SD PAL targets. Other frame sizes and frame rates are not available.
Question: I see that you have to choose 'Preview DVD Target' to make SD MPEG-2 streams with the Grid Encoder, but I don't want to make a DVD with this software? Also, does 'Preview' mean lower quality?
Answer: The name 'Preview DVD Target' is simply that - a name. You can still choose to make elementary streams, with custom bitrate and full quality control settings. You can even encode the audio to AC-3.
Question: Why can't the Grid Encoder use VBR?
Answer: The process of grid encoding makes it mathematically impossible to use a variable bitrate without the risk of creating an illegal stream, (bitrate/GOP errors). When the grid encoder is engaged, it breaks the source up into separate components - each of which is assigned a CPU core to be encoded. Once all the components are encoded, they are reconnected. The problem is that the initial division, and then the subsequent reconnection of the components would need to adhere to the variable bitrate specified, but the encoder cannot know which bitrate to begin with and to end with, on any single component and ensure that it matches precisely with the next component. Using a controlled bitrate ensures that the connection is precise, and provides a legal MPEG stream in the shortest time possible.