![]() ![]() Video and audio streams in destination file encoded by some codecs.Įach codec has -map parameter which links it either to input stream or toĬodec defines a set of encoding parameters like bitrate or number of audioĬhannels. There are two syntaxes to define edges between graph nodes:įrom fffw.encoding import * ff = FFMPEG () source = ff output_file ( 'output.mp4', VideoCodec ( 'libx264' )) # tell ffmpeg that it'll output something to destination file ff > output Output files ¶ ![]() Receives a raw video/audio stream from filter graph, compress it and pass Starts from decoder (a thing that receives chunks of encoded video fromĭemuxer and decodes it to a raw image / audio sample sequence).Īnd the last type of node is a codec: it is an output node for graph that This graph contains filters - nodes connected with namedįilter is a node that receives one or more input streams and produces oneĮach stream is a sequence of frames (video or audio)Īnother node is an input stream: it is a starting node for graph that Filter graph definition ¶įfmpeg provides a very powerful tool for video and audio stream processing -įilter graph. Name ( output.mp4) but it may contain some muxer parameters. The last part is output file definition section. This section usually contains lot’s of codec-specific parameter like bitrate or map - what is an input for this codec, input stream or graph edge. In details we’ll discuss it in section Filter graph definition. Second part contains parameters related to input files:Īfter that there is a -filter_complex parameter that describes stream mp4 First section contains common ffmpeg flags: ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |