Defined in avcodec.h

Initializes the AVCodecContext to use the given AVCodec. Prior to using this function the context has to be allocated.

The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for retrieving a codec.

WARNING: This function is not thread safe!

Example:

avcodec_register_all();
 
codec = avcodec_find_decoder(CODEC_ID_H264);
if (!codec) exit(1);
 
context = avcodec_alloc_context();
if (avcodec_open(context, codec) < 0) exit(1);

int avcodec_open(AVCodecContext *avctx, AVCodec *codec);

AVCodecContext *avctx

The AVCodecContext which will be set up to use the given codec.

AVCodec *codec

The AVCodec to use within the context.

Zero on success, a negative value on error

avcodec_alloc_context(), avcodec_find_decoder(), avcodec_find_encoder()

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