Encoder or decoder requires flushing with NULL input at the end in order to
give the complete and correct output.
NOTE: If this flag is not set, the codec is guaranteed to never be fed with
with NULL data. The user can still send NULL data to the public encode
or decode function, but libavcodec will not pass it along to the codec
unless this flag is set.
Decoders:
The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
avpkt->size=0 at the end to get the delayed data until the decoder no longer
returns frames.
Encoders:
The encoder needs to be fed with NULL data at the end of encoding until the
encoder no longer returns data.
NOTE: For encoders implementing the AVCodec.encode2() function, setting this
flag also means that the encoder must set the pts and duration for
each output packet. If this flag is not set, the pts and duration will
be determined by libavcodec from the input frame.
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and correct output.
NOTE: If this flag is not set, the codec is guaranteed to never be fed with with NULL data. The user can still send NULL data to the public encode or decode function, but libavcodec will not pass it along to the codec unless this flag is set.
Decoders: The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, avpkt->size=0 at the end to get the delayed data until the decoder no longer returns frames.
Encoders: The encoder needs to be fed with NULL data at the end of encoding until the encoder no longer returns data.
NOTE: For encoders implementing the AVCodec.encode2() function, setting this flag also means that the encoder must set the pts and duration for each output packet. If this flag is not set, the pts and duration will be determined by libavcodec from the input frame.