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23 lines
1.1 KiB
Plaintext
23 lines
1.1 KiB
Plaintext
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Veejay's performace depends much on the memory bandwith, CPU and disk access.
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For HDTV (1280x720) mjpeg, you need at least a 2.5 ghz. The faster the better.
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For full PAL/NTSC resolutions (720x576 resp. 720x480) DV/Mjpeg you need at least a 1.5 ghz,
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for lower resolution (352x288) you can do fine with a 500-800 mhz PC.
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If you need to record without framedrop, you can do so by disabling audio and
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disabling synchronization with the commandline options -a0 -c0
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On newer PC's (pentium4) your best bet is working in RAW or MLZO (compressed)
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YUV 4:2:0 / 4:2:2 On my pentium 4 , 3.0 ghz playing a AVI file that contains RAW YUV frames
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uses about 3-4% for a full PAL movie and 10-12% for mixing 2 movies.
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The tradeoff here is your diskspeed. You could use compression, this reduces the
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size of the videofile anywhere between 0-30% .
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Typical for laptops is slow diskspeed access, on my 1.8 ghz dell latitude laptop
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the best I get is an average of about 20.0 mb/sec which is barely sufficient
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for playing full PAL avi's containing RAW YUV.
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(you can test yours with hdparm -T -t /dev/hdX)
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