[FFmpeg-user] Mpeg Encode returns zero for the first frame

[Jorge Fonseca]

Hi All,

I trying to create a mpeg video following FFmpeg examples.
Every time* "avcodec_encode_video"* returns ZERO only for the FIRST
frame/packet.

Consequently, after insert more frames i got "*Encode Buffer underflow*" in
Encode function.

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Does anyone know how MPEG encode works for the first frame? E why zero is
return?

PS. in this case, the outbut buffer was not filled.

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Regards,
Jorge.