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How to create 50mbps MPEG2
I have final cut studio 5.1 and I need to archive some HDV footage in MPEG2 format at a data rate of 50mbps. I can’t see a way of getting compressor to do this as the maximum bit rate it allows for MPEG2 1080i seems to be 29mbps. Do I need some other software to do this? Bit vice doesn’t seem to handle HD sizes and is limited around 9mbps.
I also need to create a 640pixel wide version at 15mbps MPEG-2 Main Profile program stream, with 4:2:0 colour space and long open GOP. The audio has to be MPEG1 Layer II 384kbps muxed into the program stream. It looks like compressor only outputs mpeg2 at PAL, NTSC, 720p and 1080i sizes, and will not mux the audio.
Any advice would be appreciated, I suspect compressor is not really the thing to use here?
Thanks
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3 Replies
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If its HDV footage, then the bitrates are fixed. What’s more, it started life being recorded at between 19 and 25 mbits/s, so there’s not much point in archiving it at a higher rate.
If it’s a mix of HDV, HD and generated footage, you might use MJPEG which is much less efficient than MPEG-2 but a common archiving format that is easy to re-use, or if archiving space is an issue, think about very high bitrate H.264. I used 14mb/s H.264 encodings (~ equiv to 60mb/s MPEG-2) to ship HDCAM footage on DVD-ROMs and it worked well.
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Isn’t this an IMX codec? Are you trying to get this out to IMX? If so, export > quicktime movie and change the current settings to IMX 8bit NTSC 50mbps or whatever it is and then click “make movie self contained”.
I don’t know if this is what you want, I have no experience with IMX, but maybe that’s what you need.
Jeremy
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I have a spec sheet that has asked for two things: 50Mbps MPEG2 with uncompressed audio – no more specifics are given – and 15Mbps MPEG2 with the other specs as in my first post. I wondered whether these specs indicated some common format, perhaps the first is IMX but I don’t know what the second is or how to create it:
MPEG-2 Main Profile program stream, 15Mbit/sec, 4:2:0 color space, Long open GOP, width 640px, muxed audio in MPEG-1 Layer II 384kbit/sec
Is that some common format that goes by a simple name?
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