Encoding

Data Structures
struct	RcOverride

Macros
#define	AV_INPUT_BUFFER_MIN_SIZE   16384

Functions
attribute_deprecated int	avcodec_encode_audio2 (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
	Encode a frame of audio. More...
attribute_deprecated int	avcodec_encode_video2 (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
	Encode a frame of video. More...
int	avcodec_encode_subtitle (AVCodecContext *avctx, uint8_t *buf, int buf_size, const AVSubtitle *sub)

Detailed Description

Macro Definition Documentation

AV_INPUT_BUFFER_MIN_SIZE

#define AV_INPUT_BUFFER_MIN_SIZE   16384

minimum encoding buffer size Used to avoid some checks during header writing.

Definition at line 222 of file avcodec.h.

Function Documentation

avcodec_encode_audio2()

attribute_deprecated int avcodec_encode_audio2	(	AVCodecContext *	avctx,
		AVPacket *	avpkt,
		const AVFrame *	frame,
		int *	got_packet_ptr
	)

Encode a frame of audio.

Takes input samples from frame and writes the next output packet, if available, to avpkt. The output packet does not necessarily contain data for the most recent frame, as encoders can delay, split, and combine input frames internally as needed.

Parameters

avctx

codec context

avpkt

output AVPacket. The user can supply an output buffer by setting avpkt->data and avpkt->size prior to calling the function, but if the size of the user-provided data is not large enough, encoding will fail. If avpkt->data and avpkt->size are set, avpkt->destruct must also be set. All other AVPacket fields will be reset by the encoder using av_init_packet(). If avpkt->data is NULL, the encoder will allocate it. The encoder will set avpkt->size to the size of the output packet.

If this function fails or produces no output, avpkt will be freed using av_packet_unref().

Parameters

[in]	frame	AVFrame containing the raw audio data to be encoded. May be NULL when flushing an encoder that has the AV_CODEC_CAP_DELAY capability set. If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame can have any number of samples. If it is not set, frame->nb_samples must be equal to avctx->frame_size for all frames except the last. The final frame may be smaller than avctx->frame_size.
[out]	got_packet_ptr	This field is set to 1 by libavcodec if the output packet is non-empty, and to 0 if it is empty. If the function returns an error, the packet can be assumed to be invalid, and the value of got_packet_ptr is undefined and should not be used.

Returns

0 on success, negative error code on failure

Deprecated:

use avcodec_send_frame()/avcodec_receive_packet() instead. If allowed and required, set AVCodecContext.get_encode_buffer to a custom function to pass user supplied output buffers.

Definition at line 500 of file encode.c.

avcodec_encode_video2()

attribute_deprecated int avcodec_encode_video2	(	AVCodecContext *	avctx,
		AVPacket *	avpkt,
		const AVFrame *	frame,
		int *	got_packet_ptr
	)

Encode a frame of video.

Takes input raw video data from frame and writes the next output packet, if available, to avpkt. The output packet does not necessarily contain data for the most recent frame, as encoders can delay and reorder input frames internally as needed.

Parameters

avctx

codec context

avpkt

output AVPacket. The user can supply an output buffer by setting avpkt->data and avpkt->size prior to calling the function, but if the size of the user-provided data is not large enough, encoding will fail. All other AVPacket fields will be reset by the encoder using av_init_packet(). If avpkt->data is NULL, the encoder will allocate it. The encoder will set avpkt->size to the size of the output packet. The returned data (if any) belongs to the caller, he is responsible for freeing it.

If this function fails or produces no output, avpkt will be freed using av_packet_unref().

Parameters

[in]	frame	AVFrame containing the raw video data to be encoded. May be NULL when flushing an encoder that has the AV_CODEC_CAP_DELAY capability set.
[out]	got_packet_ptr	This field is set to 1 by libavcodec if the output packet is non-empty, and to 0 if it is empty. If the function returns an error, the packet can be assumed to be invalid, and the value of got_packet_ptr is undefined and should not be used.

Returns

0 on success, negative error code on failure

Deprecated:

use avcodec_send_frame()/avcodec_receive_packet() instead. If allowed and required, set AVCodecContext.get_encode_buffer to a custom function to pass user supplied output buffers.

Definition at line 513 of file encode.c.

Referenced by filter(), and filter_frame().

avcodec_encode_subtitle()

int avcodec_encode_subtitle	(	AVCodecContext *	avctx,
		uint8_t *	buf,
		int	buf_size,
		const AVSubtitle *	sub
	)

Definition at line 146 of file encode.c.

Referenced by do_subtitle_out(), and wrap().