![]() ![]() Bitrate indicates the speed at which the data is transferred from one place to another in a given time. If you have no idea about bitrate for 1080p at all, perhaps you should learn of the terms first. For example, some would ask what the best video bitrate is for 1080p HD videos? To know its answer, you need to have an understanding of bitrate and resolution at first. Some of you may wonder if there is a certain connection between bitrate and resolution. Surely, there are some other factors like video codec. I'm considering to buy DVD burner next month.What Is the Best Video Bitrate for 1080p?īitrate and resolution are two main influential factors that decide the quality of a video you play on your every sort of devices. Only broblem in these high bitrate captures is the space consumption. Thanks to sigma x-card's high quality video-output. It is difficult to tell difference between live broadcast and capture 6000 kbps with interlaced encoding (and decoding). But the quality 6000 kbps is awesome and when capturing using interlaced encoding, the motion is very smooth. I think that high bitrate eats memory bandwith, and I can't capture for example over 8000 kbps, because CPU load rises to 100 %. ![]() I've noticed that if I use higher bitrates, the CPU load increases. Still, I have sticked to nic's because so far all is ok (why fix something that is not broken?). But nic's has too, maybe I have to test the koepi's codec. I'm using nic's Xvid, maybe the koepi's is faster, because it has some optimizations for P4. Still zero frame drops, thanks to audio resample. I have P4 (154 FSB) with mem ratio of 4:3 and capturing with virtual dub sync I get 75-95 % of CPU load (little real time noise reduction turned on). Of course much CPU power is needed though. To sum up, my advise is that You should capture with full res, if You already use high bitrate (6000 kbps). With 6000 kbps and little (chroma)noise reduction there is no macroblocks. is enough, but there are macroblocks in fast motion kbps. In my tests I've found that 4000-5000 kbps for full res. So I get better quality out from the capture chip with full resolution rather than 384x288.īut of course, when the resolution is higher and the ringing is not visible, there is possibility for macroblocks to be present. But if You use higher resolution, that ringing is not so visible.Īnd my capture card outputs better quality with full resolution 720x576 PAL, because it's filter's are optimized for that resolution. I've found that lower resolution needs big bitrate to avoid ringin in sharp edges. I capture directly with DIVX at 6000kbps 320x240 with excellent quality. I just don't have time for recompressing operation, so best option for me is direct xvid conversion. Of course capturing at full resolution PAL directly to xvid takes much cpu power, but it is worth it, because I don't need to recompress anything. I use "virtual dub sync" for capturing and use little realtime noise reduction in the settings. ![]() This cropping also allows lesser bitrate for encoding. (I crop vertically for example letterboxed movies, which have black bars at the bottom and top of the screen). I use sigma designs x-card for playback, which can reproduce interlaced smooth motion even if I crop vertically. With xvid codec, I can crop vertically even number of lines from bottom and top of the video and maintain interlaced encoding. Interlaced video eats bandwidth, I know, but I prefer smooth motion, because I watch my captures from my TV and deinterlacing destroys the motion. I use enable interlacing to get smooth motion video.īitrate must be over 2000 kbps for acceptable quality, when using full PAL resolution (720 x 576). ![]()
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