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MPEG2 file needs transcoding!
Hi,
I’ve been using Premiere 6.5 export to Procoder to MPEG2 then into Encore 1.5. I’m now tryng the same with Pro 1.5 and Procoder 2 but when i get into Encore it says the file needs to be transcoded. I’ve recently edited a piece which took 1&1/2 hrs to encode then Encore spent about 15 mins re-transcoding it. The Encore transcode is relativly short but i’ve no idea why this is happening. Any thoughts?
Thanks in advance.
Tim -
9 Replies
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Is the MPEG-2 perhaps 704 instead of 720 pixels wide? Or is it a multiplexed file with MPEG-1 Layer II audio inside?
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Hi Roadkill,
I’m definitely exporting at 720 x 576 @ 25fps PAL, 6000bps. I switch optomise frames off. Just thought: all the DV footage is lower field first, Procoder defaults to lower field first – should i be exporting upper field first for Pal? I’ve done a quick search and there seems to be conflicting information.
Thanks. -
The field order should be okay. If it were incorrect you wouldn’t see Encore re-encoding, but rather “jittering” on all movement once the finished DVD is played on a TV.
Is the file elementary (video only) or is it multiplexed (video and audio in the same file)?
Another thought: Was ProCoder set to place a sequence header on each GOP?
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Hi Roadkill,
Seperate video and audio files. MPEG video imported as timeline, audio as asset then added to the timeline. Not sure about sequence header on each GOP – what should it be?
Thanks. -
There should be a sequence header on each GOP, otherwise the stream isn’t DVD compliant.
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Hi,
I’ll check everything again when i’m in front of the edit machine in the morning. Thanks for all your help – i may be back tomorrow!
Tim. -
Hi Roadkill,
Slightly bizzare; I tried exporting from Pro via Procoder using Procoder export instead of the export wizard and it now works fine in Encore. I’ll just do it this way.
Thanks for your suggestions. -
I had a similar problem. I had encoded using Cleaner XL and when I brought it into Encore, it wanted to re-encode. There was no real quality difference, but it took longer and it was re-compressed to some extent. I used Main Concepts stand alone version and there were no issues. Sounds like it maybe the GOP header issue. Perhaps the two handle it differently???
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Tim,
Maybe you selected a “generic” MPEG-2 profile instead of a DVD MPEG-2 one in ProCoder’s export wizard? While sequence headers are required for DVD compliant video, they are not mandatory for all MPEG-2 variations.
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