interlaced source-target diff

[45tripp]

I'm trying to encode the strobe light DV sample to mpeg2.
Several encoders return a target that is one field ahead of the source.
I need identical frames.
The field order is correctly flagged as bff.
I'm not that familiar with interlaced material. What can I do?

ty

[jagabo]

Are you encoding the BFF DV AVI to TFF MPEG? To convert BFF to TFF you either can shift the frame up or down by one scan line or throw away the first field and recombine the remaining fields. It sounds like your MPEG encoder is doing the latter.

If you encode as BFF MPEG2 you shouldn't have any problems.

[45tripp]

ty

how do I get bff mpeg2 output with HC?

[gadgetguy]

Specify Interlaced and then on the advanced tab select BFF

[45tripp]

That only correctly flags input video field order.
AFAIK there is no gui option for mpeg2 bff output.
Is there a way by manually changing the ini file or a command line way?
Or is HC currently unable to output bff mpeg2 video?

[gadgetguy]

All of the video I encode with HC results in bff mpeg2. My source is always DV-AVI/BFF from my camcorder. On the newest version of HC the tab is labeled Settings1, but it's the same thing. On the Main tab you select 'interlaced' and on the Settings1 tab you select BFF. You are not telling HC what the source is, you are specifying the encoding parameters and it assumes that you have set up the correct field order in AviSynth to feed to it. What you specify to encode to should match what the source you're feeding it is or you will see problems on playback.

[45tripp]

ok.
I didn't actually check the field order of output.
My primary goal was to get a target file with identical frames to the source's frames.
With DV type1 conversion, HC outputs a target that's one frame ahead of the source.
The last thing I did was convert to type 2 and try again, but probably in haste didn't save
the new avisynth script.
I've got what I want now.

ty