5 ms·
But couldn't you just have each core start at a different key frame?
by halter73 14y ago
But couldn't you just have each core start at a different key frame?
- miahi 14y agoTo start encoding at different times with each core you would need a really fast (read: expensive) storage (every core will need a steady stream to compress, if you have 64 cores you need a storage that can handle 64 parallel requests really fast or a lot of RAM to cache everything) and the chips have to handle really heavy I/O. The current many-core ARMs only have a small amount of dedicated RAM for each core. Also, keyframes are not known from the start in many encodings. A keyframe is inserted when the difference between a frame and the next one is big; this can only be detected when encoding, or with a multi-pass encoding.
- rorrr 14y agoEven cheap modern SSDs can handle 400-500 MB/sec reads. You can consume 500 MB chunks of video into RAM and eliminate I/O bottleneck completely. Video encoding is CPU-bound, not I/O bound.