Allow decoders to produce frames with data planes that are not aligned to CPU requirements (e.g.

due to cropping).

Definition at line 209 of file avcodec.h.

Use fixed qscale.

Definition at line 213 of file avcodec.h.

4 MV per MB allowed / advanced prediction for H.263.

Definition at line 217 of file avcodec.h.

Output even those frames that might be corrupted.

Definition at line 221 of file avcodec.h.

Use qpel MC.

Definition at line 225 of file avcodec.h.

Request the encoder to output reconstructed frames, i.e. frames that would be produced by decoding the encoded bitstream.

These frames may be retrieved by calling avcodec_receive_frame() immediately after a successful call to avcodec_receive_packet().

Should only be used with encoders flagged with the AV_CODEC_CAP_ENCODER_RECON_FRAME capability.

Note

Each reconstructed frame returned by the encoder corresponds to the last encoded packet, i.e. the frames are returned in coded order rather than presentation order.

Frame parameters (like pixel format or dimensions) do not have to match the AVCodecContext values. Make sure to use the values from the returned frame.

Definition at line 244 of file avcodec.h.

decoding

Request the decoder to propagate each packet's AVPacket.opaque and AVPacket.opaque_ref to its corresponding output AVFrame.

encoding:

Request the encoder to propagate each frame's AVFrame.opaque and AVFrame.opaque_ref values to its corresponding output AVPacket.

May only be set on encoders that have the AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE capability flag.

Note

While in typical cases one input frame produces exactly one output packet (perhaps after a delay), in general the mapping of frames to packets is M-to-N, so

• Any number of input frames may be associated with any given output packet. This includes zero - e.g. some encoders may output packets that carry only metadata about the whole stream.
• A given input frame may be associated with any number of output packets. Again this includes zero - e.g. some encoders may drop frames under certain conditions.

This implies that when using this flag, the caller must NOT assume that

• a given input frame's opaques will necessarily appear on some output packet;
• every output packet will have some non-NULL opaque value.

When an output packet contains multiple frames, the opaque values will be taken from the first of those.

The converse holds for decoders, with frames and packets switched.

Definition at line 279 of file avcodec.h.

Signal to the encoder that the values of AVFrame.duration are valid and should be used (typically for transferring them to output packets).

If this flag is not set, frame durations are ignored.

Definition at line 286 of file avcodec.h.

Use internal 2pass ratecontrol in first pass mode.

Definition at line 290 of file avcodec.h.

Use internal 2pass ratecontrol in second pass mode.

Definition at line 294 of file avcodec.h.

loop filter.

Definition at line 298 of file avcodec.h.

Only decode/encode grayscale.

Definition at line 302 of file avcodec.h.

error[?] variables will be set during encoding.

Definition at line 306 of file avcodec.h.

Use interlaced DCT.

Definition at line 310 of file avcodec.h.

Force low delay.

Definition at line 314 of file avcodec.h.

Place global headers in extradata instead of every keyframe.

Examples

mux.c, transcode.c, and transcode_aac.c.

Definition at line 318 of file avcodec.h.

Use only bitexact stuff (except (I)DCT).

Definition at line 322 of file avcodec.h.

H.263 advanced intra coding / MPEG-4 AC prediction.

Definition at line 327 of file avcodec.h.

interlaced motion estimation

Definition at line 331 of file avcodec.h.

Definition at line 332 of file avcodec.h.

Allow non spec compliant speedup tricks.

Definition at line 337 of file avcodec.h.

Skip bitstream encoding.

Definition at line 341 of file avcodec.h.

Place global headers at every keyframe instead of in extradata.

Definition at line 345 of file avcodec.h.

Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.

Definition at line 351 of file avcodec.h.

Discard cropping information from SPS.

Definition at line 355 of file avcodec.h.

Show all frames before the first keyframe.

Definition at line 360 of file avcodec.h.

Export motion vectors through frame side data.

Definition at line 364 of file avcodec.h.

Do not skip samples and export skip information as frame side data.

Definition at line 368 of file avcodec.h.

Do not reset ASS ReadOrder field on flush (subtitles decoding)

Definition at line 372 of file avcodec.h.

Generate/parse ICC profiles on encode/decode, as appropriate for the type of file.

No effect on codecs which cannot contain embedded ICC profiles, or when compiled without support for lcms2.

Definition at line 378 of file avcodec.h.

Export motion vectors through frame side data.

Definition at line 386 of file avcodec.h.

Export encoder Producer Reference Time through packet side data.

Definition at line 390 of file avcodec.h.

Decoding only.

Export the AVVideoEncParams structure through frame side data.

Definition at line 395 of file avcodec.h.

Decoding only.

Do not apply film grain, export it instead.

Definition at line 400 of file avcodec.h.

Decoding only.

Do not apply picture enhancement layers, export them instead.

Definition at line 406 of file avcodec.h.

The decoder will keep a reference to the frame and may reuse it later.

Definition at line 411 of file avcodec.h.

The encoder will keep a reference to the packet and may reuse it later.

Definition at line 416 of file avcodec.h.

Definition at line 2053 of file avcodec.h.

Decoder can use draw_horiz_band callback.

Definition at line 44 of file codec.h.

Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.

If not set, it might not use get_buffer() or get_encode_buffer() at all, or use operations that assume the buffer was allocated by avcodec_default_get_buffer2 or avcodec_default_get_encode_buffer.

Definition at line 52 of file codec.h.

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.

Examples

transcode.c.

Definition at line 76 of file codec.h.

Codec can be fed a final frame with a smaller size.

This can be used to prevent truncation of the last audio samples.

Definition at line 81 of file codec.h.

Codec is experimental and is thus avoided in favor of non experimental encoders.

Definition at line 87 of file codec.h.

Codec should fill in channel configuration and samplerate instead of container.

Definition at line 91 of file codec.h.

Codec supports frame-level multithreading.

Definition at line 95 of file codec.h.

Codec supports slice-based (or partition-based) multithreading.

Definition at line 99 of file codec.h.

Codec supports changed parameters at any point.

Definition at line 103 of file codec.h.

Codec supports multithreading through a method other than slice- or frame-level multithreading.

Typically this marks wrappers around multithreading-capable external libraries.

Definition at line 109 of file codec.h.

Audio encoder supports receiving a different number of samples in each call.

Examples

mux.c.

Definition at line 113 of file codec.h.

Decoder is not a preferred choice for probing.

This indicates that the decoder is not a good choice for probing. It could for example be an expensive to spin up hardware decoder, or it could simply not provide a lot of useful information about the stream. A decoder marked with this flag should only be used as last resort choice for probing.

Definition at line 123 of file codec.h.

Codec is backed by a hardware implementation.

Typically used to identify a non-hwaccel hardware decoder. For information about hwaccels, use avcodec_get_hw_config() instead.

Definition at line 130 of file codec.h.

Codec is potentially backed by a hardware implementation, but not necessarily.

This is used instead of AV_CODEC_CAP_HARDWARE, if the implementation provides some sort of internal fallback.

Definition at line 137 of file codec.h.

This encoder can reorder user opaque values from input AVFrames and return them with corresponding output packets.

See also

AV_CODEC_FLAG_COPY_OPAQUE

Definition at line 144 of file codec.h.

This encoder can be flushed using avcodec_flush_buffers().

If this flag is not set, the encoder must be closed and reopened to ensure that no frames remain pending.

Definition at line 151 of file codec.h.

The encoder is able to output reconstructed frame data, i.e.

raw frames that would be produced by decoding the encoded bitstream.

Reconstructed frame output is enabled by the AV_CODEC_FLAG_RECON_FRAME flag.

Definition at line 159 of file codec.h.

Codec uses only intra compression.

Video and audio codecs only.

Definition at line 72 of file codec_desc.h.

Codec supports lossy compression.

Audio and video codecs only.

Note

a codec may support both lossy and lossless compression modes

Definition at line 78 of file codec_desc.h.

Codec supports lossless compression.

Audio and video codecs only.

Definition at line 82 of file codec_desc.h.

Codec supports frame reordering.

That is, the coded order (the order in which the encoded packets are output by the encoders / stored / input to the decoders) may be different from the presentation order of the corresponding frames.

For codecs that do not have this property set, PTS and DTS should always be equal.

Definition at line 92 of file codec_desc.h.

Video codec supports separate coding of fields in interlaced frames.

Definition at line 97 of file codec_desc.h.

Subtitle codec is bitmap based Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field.

Definition at line 103 of file codec_desc.h.

Subtitle codec is text based.

Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field.

Definition at line 108 of file codec_desc.h.

Definition at line 2035 of file avcodec.h.

Definition at line 290 of file codec.h.

Identify the syntax and semantics of the bitstream.

The principle is roughly: Two decoders with the same ID can decode the same streams. Two encoders with the same ID can encode compatible streams. There may be slight deviations from the principle due to implementation details.

If you add a codec ID to this list, add it so that

1. no value of an existing codec ID changes (that would break ABI),
2. it is as close as possible to similar codecs

After adding new codec IDs, do not forget to add an entry to the codec descriptor list and bump libavcodec minor version.

Definition at line 49 of file codec_id.h.

Return the LIBAVCODEC_VERSION_INT constant.

Definition at line 32 of file version.c.

Return the libavcodec build-time configuration.

Definition at line 47 of file version.c.

Return the libavcodec license.

Definition at line 52 of file version.c.

Allocate an AVCodecContext and set its fields to default values.

The resulting struct should be freed with avcodec_free_context().

Parameters

codec if non-NULL, allocate private data and initialize defaults for the given codec. It is illegal to then call avcodec_open2() with a different codec. If NULL, then the codec-specific defaults won't be initialized, which may result in suboptimal default settings (this is important mainly for encoders, e.g. libx264).

Returns

An AVCodecContext filled with default values or NULL on failure.

Examples

decode_audio.c, decode_filter_audio.c, decode_filter_video.c, decode_video.c, demux_decode.c, encode_audio.c, encode_video.c, extract_mvs.c, hw_decode.c, mux.c, qsv_decode.c, qsv_transcode.c, transcode.c, transcode_aac.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 149 of file options.c.

Referenced by add_stream(), avcodec_dct_init(), avformat_new_stream(), codec_close(), config_input(), config_props(), cri_decode_init(), dash_init(), dec_open(), ds_open(), dump_stream_format(), dump_stream_group(), dump_stream_meta(), enc_alloc(), estimate_best_b_count(), ff_frame_thread_encoder_init(), ff_load_image(), flac_read_timestamp(), ftr_init(), imm5_init(), init_decoder(), init_encoder(), LLVMFuzzerTestOneInput(), main(), old_flac_header(), open_codec_context(), open_input_file(), open_output_file(), open_stream(), seek_test(), stream_component_open(), streamcopy_init(), tdsc_init(), tiff_init(), video_decode(), and video_decode_example().

Free the codec context and everything associated with it and write NULL to the provided pointer.

Examples

decode_audio.c, decode_filter_audio.c, decode_filter_video.c, decode_video.c, demux_decode.c, encode_audio.c, encode_video.c, extract_mvs.c, hw_decode.c, mux.c, qsv_decode.c, qsv_transcode.c, transcode.c, transcode_aac.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 164 of file options.c.

Referenced by avcodec_dct_init(), close_input_file(), close_stream(), codec_close(), cri_decode_close(), dash_free(), dec_free(), decoder_destroy(), decoder_thread(), ds_free(), dump_stream_format(), dump_stream_group(), dump_stream_meta(), enc_free(), estimate_best_b_count(), ff_frame_thread_encoder_init(), ff_free_stream(), ff_load_image(), flac_close(), ftr_close(), imm5_close(), LLVMFuzzerTestOneInput(), main(), movie_uninit(), old_flac_header(), open_input_file(), open_output_file(), seek_test(), stream_component_open(), streamcopy_init(), tdsc_close(), tiff_end(), uninit(), video_decode(), video_decode_example(), and worker().

Get the AVClass for AVCodecContext.

It can be used in combination with AV_OPT_SEARCH_FAKE_OBJ for examining options.

See also

av_opt_find().

Definition at line 184 of file options.c.

Referenced by check_avoptions_used(), filter_codec_opts(), opt_default(), show_codec_opts(), and show_help_default().

Get the AVClass for AVSubtitleRect.

It can be used in combination with AV_OPT_SEARCH_FAKE_OBJ for examining options.

See also

av_opt_find().

Definition at line 209 of file options.c.

Fill the parameters struct based on the values from the supplied codec context.

Any allocated fields in par are freed and replaced with duplicates of the corresponding fields in codec.

Returns

>= 0 on success, a negative AVERROR code on failure

Examples

mux.c, qsv_transcode.c, transcode.c, transcode_aac.c, and vaapi_transcode.c.

Definition at line 138 of file codec_par.c.

Referenced by aom_init(), codec_close(), dec_enc(), decode_bsfs_init(), encode_frame(), ff_frame_thread_encoder_init(), mediacodec_init_bsf(), of_stream_init(), open_audio(), open_output_file(), open_video(), parameters_from_context(), qsv_enc_init(), and streamcopy_init().

Fill the codec context based on the values from the supplied codec parameters.

Any allocated fields in codec that have a corresponding field in par are freed and replaced with duplicates of the corresponding field in par. Fields in codec that do not have a counterpart in par are not touched.

Returns

>= 0 on success, a negative AVERROR code on failure.

Examples

decode_filter_audio.c, decode_filter_video.c, demux_decode.c, extract_mvs.c, hw_decode.c, qsv_transcode.c, transcode.c, transcode_aac.c, and vaapi_transcode.c.

Referenced by avformat_find_stream_info(), codec_close(), dash_init(), dec_open(), ds_open(), dump_stream_format(), dump_stream_group(), dump_stream_meta(), ff_frame_thread_encoder_init(), ff_load_image(), flac_read_timestamp(), main(), old_flac_header(), open_codec_context(), open_input_file(), open_stream(), read_frame_internal(), seek_test(), stream_component_open(), streamcopy_init(), update_stream_avctx(), video_decode(), and video_decode_example().

Initialize the AVCodecContext to use the given AVCodec.

Prior to using this function the context has to be allocated with avcodec_alloc_context3().

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.

Depending on the codec, you might need to set options in the codec context also for decoding (e.g. width, height, or the pixel or audio sample format in the case the information is not available in the bitstream, as when decoding raw audio or video).

Options in the codec context can be set either by setting them in the options AVDictionary, or by setting the values in the context itself, directly or by using the av_opt_set() API before calling this function.

Example:

In the case AVCodecParameters are available (e.g. when demuxing a stream using libavformat, and accessing the AVStream contained in the demuxer), the codec parameters can be copied to the codec context using avcodec_parameters_to_context(), as in the following example:

Note

Always call this function before using decoding routines (such as avcodec_receive_frame()).

Parameters

avctx The context to initialize.

codec The codec to open this context for. If a non-NULL codec has been previously passed to avcodec_alloc_context3() or for this context, then this parameter MUST be either NULL or equal to the previously passed codec.

options A dictionary filled with AVCodecContext and codec-private options, which are set on top of the options already set in avctx, can be NULL. On return this object will be filled with options that were not found in the avctx codec context.

Returns

zero on success, a negative value on error

See also

avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(), av_dict_set(), av_opt_set(), av_opt_find(), avcodec_parameters_to_context()

Definition at line 145 of file avcodec.c.

Referenced by avformat_find_stream_info(), config_input(), config_props(), cri_decode_init(), dec_enc(), dec_open(), ds_run(), dump_stream_meta(), enc_open(), estimate_best_b_count(), ff_frame_thread_encoder_init(), ff_load_image(), ftr_init(), imm5_init(), init_decoder(), init_encoder(), LLVMFuzzerTestOneInput(), main(), open_audio(), open_codec_context(), open_input_file(), open_output_file(), open_stream(), open_video(), process_frame(), seek_test(), stream_component_open(), tdsc_init(), tiff_init(), try_decode_frame(), video_decode(), video_decode_example(), and wrap().

Free all allocated data in the given subtitle struct.

Parameters

sub AVSubtitle to free.

Definition at line 412 of file avcodec.c.

Referenced by avcodec_decode_subtitle2(), copy_av_subtitle(), display_end_segment(), frame_queue_unref_item(), process_frame(), subtitle_free(), subtitle_handler(), subtitle_thread(), subtitle_wrap_frame(), transcode_subtitles(), and try_decode_frame().

Iterate over all registered codecs.

Parameters

opaque a pointer where libavcodec will store the iteration state. Must point to NULL to start the iteration.

Returns

the next registered codec or NULL when the iteration is finished

Definition at line 988 of file allcodecs.c.

Referenced by choose_decoder(), codec_child_class_iterate(), find_codec(), find_codec_by_name(), find_probe_decoder(), main(), next_codec_for_id(), and show_codec_opts().

Find a registered decoder with a matching codec ID.

Parameters

id AVCodecID of the requested decoder

Returns

A decoder if one was found, NULL otherwise.

Definition at line 1037 of file allcodecs.c.

Referenced by avcodec_get_name(), avcodec_open2(), AVCodecInitialize(), choose_decoder(), codec_close(), dec_standalone_open(), ds_open(), dshow_cycle_formats(), dump_stream_meta(), ff_find_decoder(), ff_load_image(), find_codec(), ftr_init(), get_decoder_for_stream(), main(), open_codec_context(), open_input_file(), open_stream(), seek_test(), show_codecs(), stream_component_open(), video_decode(), and video_decode_example().

Find a registered decoder with the specified name.

Parameters

name name of the requested decoder

Returns

A decoder if one was found, NULL otherwise.

Definition at line 1065 of file allcodecs.c.

Referenced by config_input(), dec_create(), find_codec(), find_probe_decoder(), get_decoder_by_name(), main(), open_input_file(), show_help_codec(), and stream_component_open().

Find a registered encoder with a matching codec ID.

Parameters

id AVCodecID of the requested encoder

Returns

An encoder if one was found, NULL otherwise.

Definition at line 1032 of file allcodecs.c.

Referenced by add_stream(), avcodec_get_name(), avcodec_open2(), choose_encoder(), config_props(), find_codec(), main(), map_auto_subtitle(), open_output_file(), and show_codecs().

Find a registered encoder with the specified name.

Parameters

name name of the requested encoder

Returns

An encoder if one was found, NULL otherwise.

Definition at line 1060 of file allcodecs.c.

Referenced by config_input(), find_codec(), main(), and show_help_codec().

Returns

a non-zero number if codec is an encoder, zero otherwise

Definition at line 79 of file utils.c.

Referenced by avcodec_flush_buffers(), avcodec_receive_packet(), avcodec_send_frame(), ff_codec_close(), init_prec(), main(), next_codec_for_id(), and print_codec().

Returns

a non-zero number if codec is a decoder, zero otherwise

Definition at line 85 of file utils.c.

Referenced by avcodec_send_packet(), choose_decoder(), ff_codec_close(), find_probe_decoder(), main(), next_codec_for_id(), v4l2_configure_contexts(), and v4l2_get_framesize_compressed().

Return a name for the specified profile, if available.

Parameters

codec the codec that is searched for the given profile

profile the profile value for which a name is requested

Returns

A name for the profile if found, NULL otherwise.

Definition at line 426 of file utils.c.

Retrieve supported hardware configurations for a codec.

Values of index from zero to some maximum return the indexed configuration descriptor; all other values return NULL. If the codec does not support any hardware configurations then it will always return NULL.

Examples

hw_decode.c.

Definition at line 850 of file utils.c.

Referenced by avcodec_default_get_format(), choose_decoder(), get_format(), hw_device_match_by_codec(), hw_device_setup_for_decode(), hw_device_setup_for_encode(), main(), and print_codec().

Returns

descriptor for given codec ID or NULL if no descriptor exists.

Definition at line 3878 of file codec_desc.c.

Referenced by asf_write_header1(), av_bsf_init(), avcodec_get_name(), avcodec_get_type(), avcodec_open2(), avcodec_profile_name(), dec_standalone_open(), ff_is_intra_only(), get_codec_name(), get_mimetype(), init_muxer(), ist_add(), list_formats(), main(), map_auto_subtitle(), new_stream_subtitle(), parse_codec(), print_stream_maps(), print_streams(), read_frame_internal(), show_help_bsf(), show_help_muxer(), show_stream(), unsupported_codec(), update_stream_avctx(), and vaapi_decode_make_config().

Iterate over all codec descriptors known to libavcodec.

Parameters

prev previous descriptor. NULL to get the first descriptor.

Returns

next descriptor or NULL after the last descriptor

Definition at line 3884 of file codec_desc.c.

Referenced by avcodec_descriptor_get_by_name(), get_codecs_sorted(), and main().

Returns

codec descriptor with the given name or NULL if no such descriptor exists.

Definition at line 3893 of file codec_desc.c.

Referenced by concat_parse_script(), find_codec(), main(), show_help_codec(), and v4l2_read_header().

Get the type of the given codec.

Definition at line 3903 of file codec_desc.c.

Referenced by avformat_query_codec(), m4sl_cb(), and mxf_parse_structural_metadata().

Get the name of a codec.

Returns

a static string identifying the codec; never NULL

Examples

mux.c.

Definition at line 406 of file utils.c.

Referenced by add_stream(), amv_init(), av_bsf_init(), avcodec_string(), avformat_find_stream_info(), choose_encoder(), demux_stream_alloc(), device_try_init(), dump_stream_meta(), ff_framehash_write_header(), ff_oh_mime(), ff_put_wav_header(), ff_vk_decode_init(), ff_vulkan_encode_init(), flv_init(), get_audio_flags(), get_dvb_stream_type(), get_m2ts_stream_type(), iamf_init(), ico_check_attributes(), init_muxer(), ist_use(), log_slave(), lrc_write_header(), main(), mkv_assemble_codecprivate(), mkv_init(), mkv_write_track(), mov_init(), mov_write_squashed_packets(), mpeg_mux_init(), mxf_parse_structural_metadata(), read_frame_internal(), rtp_write_header(), srt_write_header(), stream_component_open(), and vulkan_decode_get_profile().

Return codec bits per sample.

Parameters

[in] codec_id the codec

Returns

Number of bits per sample or zero if unknown for the given codec.

Definition at line 549 of file utils.c.

Referenced by adpcm_encode_init(), aiff_write_header(), avformat_find_stream_info(), caf_write_header(), epaf_read_header(), ff_alsa_open(), ff_pcm_default_packet_size(), ff_pcm_read_seek(), ff_put_wav_header(), ff_rtp_parse_open(), ff_voc_get_packet(), get_aiff_header(), get_bit_rate(), gxf_packet(), iff_read_header(), init(), init_muxer(), ircam_read_header(), mkv_write_track(), mov_get_codec_tag(), mov_init(), mov_parse_stsd_audio(), mov_read_pcmc(), mov_write_audio_tag(), mxf_handle_missing_index_segment(), mxf_init(), mxf_parse_structural_metadata(), mxf_set_audio_pts(), mxf_write_generic_sound_common(), oma_read_header(), pcm_encode_frame(), pcm_encode_init(), pcm_read_header(), read_header(), rso_read_header(), show_stream(), and wsaud_write_header().

Return codec bits per sample.

Only return non-zero if the bits per sample is exactly correct, not an approximation.

Parameters

[in] codec_id the codec

Returns

Number of bits per sample or zero if unknown for the given codec.

Definition at line 454 of file utils.c.

Referenced by av_get_bits_per_sample(), encode_preinit_audio(), get_audio_frame_duration(), imf_read_packet(), mov_write_pcmc_tag(), and ost_bind_filter().

Return a name for the specified profile, if available.

Parameters

codec_id the ID of the codec to which the requested profile belongs

profile the profile value for which a name is requested

Returns

A name for the profile if found, NULL otherwise.

Note

unlike av_get_profile_name(), which searches a list of profiles supported by a specific decoder or encoder implementation, this function searches the list of profiles from the AVCodecDescriptor

Definition at line 439 of file utils.c.

Referenced by avcodec_string(), ff_vulkan_encode_init(), init_profile(), show_stream(), and vulkan_decode_get_profile().

Return the PCM codec associated with a sample format.

Parameters

be endianness, 0 for little, 1 for big, -1 (or anything else) for native

Returns

AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE

Definition at line 527 of file utils.c.

Referenced by lavfi_read_header(), and main().

Allocate a new AVCodecParameters and set its fields to default values (unknown/invalid/0).

The returned struct must be freed with avcodec_parameters_free().

Definition at line 57 of file codec_par.c.

Referenced by audio_element_obu(), av_bsf_alloc(), avformat_new_stream(), codec_close(), encode_frame(), ff_frame_thread_encoder_init(), ff_mov_init_hinting(), flv_read_packet(), frame_data_ensure(), ist_add(), mov_create_chapter_track(), mov_create_timecode_track(), ost_add(), and parameters_from_context().

Free an AVCodecParameters instance and everything associated with it and write NULL to the supplied pointer.

Definition at line 67 of file codec_par.c.

Referenced by av_bsf_free(), codec_close(), encode_frame(), ff_frame_thread_encoder_init(), ff_free_stream(), ff_iamf_free_audio_element(), ff_mov_close_hinting(), ff_mov_init_hinting(), flv_read_packet(), frame_data_free(), ist_free(), mov_free(), ost_free(), and parameters_from_context().

Copy the contents of src to dst.

Any allocated fields in dst are freed and replaced with newly allocated duplicates of the corresponding fields in src.

Returns

>= 0 on success, a negative AVERROR code on failure.

Definition at line 107 of file codec_par.c.

Referenced by asfrtp_parse_sdp_line(), av1_read_header(), av_bsf_init(), bsf_init(), bsf_list_init(), copy_stream_props(), create_rtp_muxer(), dash_init(), detect_stream_specific(), evc_read_header(), extract_extradata_init(), ff_rtp_chain_mux_open(), ff_stream_add_bitstream_filter(), frame_data_ensure(), hds_write_header(), hls_mux_init(), iamf_read_header(), ism_write_header(), ist_add(), main(), mov_init_ttml_writer(), mpegts_init(), open_demux_for_component(), open_output_file(), open_slave(), parameters_from_context(), read_gab2_sub(), rtp_mpegts_write_header(), sap_fetch_packet(), sap_read_header(), set_stream_info_from_input_stream(), stream_params_copy(), and write_muxed_file().

This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters instead of an AVCodecContext.

Definition at line 816 of file utils.c.

Referenced by adp_read_header(), binka_read_packet(), build_frame_code(), compute_frame_duration(), compute_muxer_pkt_fields(), enable_pcr_generation_for_stream(), ff_parse_specific_params(), ff_put_wav_header(), ff_voc_get_packet(), get_aiff_header(), guess_pkt_duration(), mkv_write_track(), msf_read_header(), mux_fixup_ts(), rm_write_header(), rsd_read_header(), rtp_send_ilbc(), rv10_write_header(), svs_read_header(), swf_write_audio(), and vpk_read_seek().