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MPEG2 files from Adobe media encoder
Hi,
We got the following specefications for delivering mpeg2 commercials. When we try to match the settings in adobe media encoder (premiere), we get horrible results. One problem is that we don’t know what the settings below translates to in premiere. The problem might be with the GOP structure. But can anyone please tell us the right settings in premiere??MPEG2 Program Stream 50i
Video Size: 720 x 576 (est. file size 190MB / 30 sec)
Video levels: ITU-R BT.601-4 (RGB levels will not be accepted) Chroma: 4:2:2 (4:2:0 will not be accepted)
Bit Rate: 50Mbps Constant bitrate
GOP Structure: I frame only
Program Stream
Field Dominance: Upper field first (odd)
Audio Bit Rate: 384 kbps
Sampling Frequency: 48khz -
2 Replies
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50 mbit seems like a high number for bit rate even for MPEG-2. Not sure you can get 4:2:2 out of Premiere unless you are using a capture card.
These output settings may be possible – what is your input? -
This is commercials for TV-broadcasting. We produce graphics in PAL 16:9 and render it out from After effects uncompressed.
We only use premiere to produce the mpeg2 files for digital delivery to Viasat in the UK.
There is a 4:2:2 setting in the Adobe media encoder under profile settings. We think the problem might be with the GOP settings. When we encode with the standard settings (3M-frames and 12N-frames), the result looks good. but when we try to set m-frames and n-frames to 1 and closed gop every :0 we got bad results.
So what does I-frames only actually mean?
Also what: ITU-R BT.601-4 (RGB levels will not be accepted) Chroma: 4:2:2 (4:2:0 will not be accepted) means?
Under basic video settings in adobe media encoder you can choose a 4:2:2 option under profile but under level you can only choose between : High level, high 1440 level and main levelDoes anyone know the right settings in adobe media encoder to fullfill the required specifications? If you do, please make a post.
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