[scottlamb]

Fundamentally (ignoring ffmpeg incantations), I think there are four options:

1. re-encode the whole thing

2. re-encode just the first GOP

3. start a bit early or late

4. include the full first GOP but use an edit list to instruct the player to skip to the timestamp of interest

[vigneshv_psg]

yeah these are pretty much the options. i believe the ffmpeg command that OP suggested would do option 3.