I need to know how to generate packet loss concealment data using the ffmpeg
opus decoder.
The libopus API has:
int opus_decode(OpusDecoder *st,
const unsigned char *data,
opus_int32 len,
opus_int16 *pcm,
int frame_size,
int decode_fec
)
Which allows me to specify frame_size. Thus if data==NULL and len==0, the
decoder will generate frame_size samples of concealment audio.
However with the ffmpeg codec, using avcodec_decode_audio4(...) I'm not clear
how to specify that I want to generate N samples of concealment audio?
Unfortunately, setting AVPacket::data=NULL and AVPacket::size to the number of
samples required just crashes.
Thanks,
Henry
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