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What are the best techniques to serve video fast and reliably - like software for caching etc.

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Have a look at Panda!

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Perhaps you could use Varnish ( for caching, or consider using a CDN. Amazon S3 could also be an option, depending on what exactly you want to accomplish.

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It depends on a number of factors including who, where and what are your clients, what codec/bitrate you're using, volume of concurrent users and content, expected user experience (from 'hopefully it works' through to 'can't drop a frame') plus the usual location, existing infrastructure and budget questions. The user experience requirement is the key one to understand as it can add or remove multiple 'zeros' from your budget. So think about these basic design questions and come back when you need more specific questions answered and we'll be happy to help.

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