Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Anton Khirnov	9200514ad8	lavf: replace AVStream.codec with AVStream.codecpar Currently, AVStream contains an embedded AVCodecContext instance, which is used by demuxers to export stream parameters to the caller and by muxers to receive stream parameters from the caller. It is also used internally as the codec context that is passed to parsers. In addition, it is also widely used by the callers as the decoding (when demuxer) or encoding (when muxing) context, though this has been officially discouraged since Libav 11. There are multiple important problems with this approach: - the fields in AVCodecContext are in general one of * stream parameters * codec options * codec state However, it's not clear which ones are which. It is consequently unclear which fields are a demuxer allowed to set or a muxer allowed to read. This leads to erratic behaviour depending on whether decoding or encoding is being performed or not (and whether it uses the AVStream embedded codec context). - various synchronization issues arising from the fact that the same context is used by several different APIs (muxers/demuxers, parsers, bitstream filters and encoders/decoders) simultaneously, with there being no clear rules for who can modify what and the different processes being typically delayed with respect to each other. - avformat_find_stream_info() making it necessary to support opening and closing a single codec context multiple times, thus complicating the semantics of freeing various allocated objects in the codec context. Those problems are resolved by replacing the AVStream embedded codec context with a newly added AVCodecParameters instance, which stores only the stream parameters exported by the demuxers or read by the muxers.	9 years ago
Anton Khirnov	9f1eccb97b	ff_parse_specific_params: do not use AVCodecContext.frame_size It will not be set unless the muxing codec context is also the encoding context, which is discouraged. When the frame size is not known from av_get_audio_frame_duration(), the fallback should still be good enough.	9 years ago
Anton Khirnov	56dc46a189	riffenc: do not fall back on AVCodecContext.frame_size for MP3 It will not be set unless the codec context is used as the encoding context, which is discouraged. For MP2, av_get_audio_frame_duration() will already set the frame size properly. For MP3, set the frame size explicitly.	10 years ago
Anton Khirnov	194be1f43e	lavf: switch to AVStream.time_base as the hint for the muxer timebase Previously, AVStream.codec.time_base was used for that purpose, which was quite confusing for the callers. This change also opens the path for removing AVStream.codec. The change in the lavf-mkv test is due to the native timebase (1/1000) being used instead of the default one (1/90000), so the packets are now sent to the crc muxer in the same order in which they are demuxed (previously some of them got reordered because of inexact timestamp conversion).	11 years ago
Anton Khirnov	d754ed4172	riffenc: take an AVStream instead of an AVCodecContext It will be useful in the following commits. Also, rename the AVCodecContext pointer name from 'stream' to 'codec'.	11 years ago
nu774	584f884090	riff: Pass block_align to estimate frame duration Fix incorrect wSamplesPerBlock(=0) written for ADPCM_IMA_WAV Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	11 years ago
Clément Bœsch	235bf1dab5	riff: add ISMP/timecode tag	11 years ago
James Almer	fa570a5548	riff: Add ITRK tag Some players, like foobar2000 or modern versions of WMP, create WAV files using the ITRK tag for track instead of IPRT	11 years ago
Diego Biurrun	3dd5c95dee	riff: Move muxing code to a separate file	12 years ago