lost frames with TMPGEnc

[nickelocene]

Recently I noticed that when I convert avi to SVCD using TMPGEnc with 2-pass VBR, I lost some frames during certain scenes. SVCD jumps during the playback. Is this normal with the program or I missed some setting?

[Betamax]

You propperly missed something...

TMPGenc processes each frame, so 'lost frames' isn't possible.
Though if a high compression is used, you could see things are missing but mostly this only is because the source is bad (source = original avi).
Other possibility : you're encoding interlaced SVCD and you're using a mismatched field-order. TmpgEnc defaults to 'field B-First', replace it to 'field A-first' is necessary.
Another possibility, you're encoding using a bad template. For instance, you could have captured in PAL but are encoding in NTSC or vice-versa, then some frames are resp. thrown away or added (duplicated).
...