![]() This attribute contains the value for the http-equiv or name attribute, depending on which is used. elements which declare a character encoding must be located entirely within the first 1024 bytes of the document. If the attribute is present, its value must be an ASCII case-insensitive match for the string "utf-8", because UTF-8 is the only valid encoding for HTML5 documents. This attribute declares the document's character encoding. Note: the attribute name has a specific meaning for the element, and the itemprop attribute must not be set on the same element that has any existing name, http-equiv or charset attributes. If the itemprop attribute is set, the element provides user-defined metadata.If the charset attribute is set, the element is a charset declaration, giving the character encoding in which the document is encoded.If the http-equiv attribute is set, the element is a pragma directive, providing information equivalent to what can be given by a similarly-named HTTP header.If the name attribute is set, the element provides document-level metadata, applying to the whole page.The type of metadata provided by the element can be one of the following: If the itemprop attribute is present:Īs it is a void element, the start tag must be present and the end tagĮncoding declaration, it can also be inside a The HTML element represents metadata that cannot be represented by other HTML meta-related elements, like, ,, or. Allowing cross-origin use of images and canvas.HTML table advanced features and accessibility.From object to iframe - other embedding technologies.Assessment: Structuring a page of content.Of course I could produce a temporarily file: :-$ avconv -i test.wav -c copy -metadata title='Test title' test_temp.mp3īut this solution would create (temporarily) a new file on the filesystem and is therefore not preferable. You see, that I cannot use -c copy if input_file and output_file are the same. :~$ du -h test.wav # file size of test.wav changed dramatically Video:0kB audio:896kB global headers:0kB muxing overhead 0.005014% max_analyze_duration reachedĭuration: 00:29:58.74, bitrate: 1411 kb/s Unfortunately also this does not work: :~$ du -h test.wav # test.wav is 303 MB big So I thought to use -c copy to copy all video and audio information. Then I could set -metadata key=value and just the metadata will be changed.īut I noticed, that if I type avconv -i test.mp3 -metadata title='Test title' test.mp3 the audio test.mp3 will be reconverted in another bitrate. I hoped, that if I set -i input_file and the output_file to the same file, ffmpeg/avconv will be smart enough to leave the file unchanged. I thought ffmpeg/avconv could be such a tool, because it can handle nearly all media formats. How can I change the metadata of a file with ffmpeg/avconv without changing the audio or video of it and without creating a new file? Is there another commandline/python tool which would do the job for me? ![]() Because I have to handle many different file formats ( wav, flac, mp3, mp4, ogg, ogv.) it would be great to have a tool which add meta data to arbitrary formats. Now I want to program a function which shall add the information from the meta data text files to all media files (the original and the converted ones). There are a bunch of recorded media files (audio and video) and text files containing the meta information. I am writing a python script for producing audio and video podcasts.
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