Ffmpeg Audio Bitstream Filters

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FFmpeg Bitstream Filters Documentation

https://ffmpeg.org/ffmpeg-bitstream-filters.html

A bitstream filter operates on the encoded stream data, and performs bitstream level modifications without performing decoding. 2 Bitstream Filters When you configure your FFmpeg build, all the supported bitstream filters are enabled by default. You can list all available ones using the configure option --list-bsfs .

What are bitstream filters in ffmpeg? - Stack Overflow

https://stackoverflow.com/questions/32028437/what-are-bitstream-filters-in-ffmpeg

The h264_mp4toannexb bitstream filter fixes this, by identifying the pps/sps in the extracted parts of the file header (ffmpeg calls this "extradata"), prepending this and each nal from individual frame packets with the start code, and concatenating them back together before inputting them in the h264 decoder.

ffmpeg-bitstream-filters(1) — ffmpeg — Debian unstable ...

https://manpages.debian.org/unstable/ffmpeg/ffmpeg-bitstream-filters.1.en.html

A bitstream filter operates on the encoded stream data, and performs bitstream level modifications without performing decoding. BITSTREAM FILTERS ¶ When you configure your FFmpeg build, all the supported bitstream filters are enabled by default. You can list all available ones using the configure option "--list-bsfs" .

Ubuntu Manpage: ffmpeg-bitstream-filters - FFmpeg ...

https://manpages.ubuntu.com/manpages/cosmic/man1/ffmpeg-bitstream-filters.1.html

The option "-bsfs" of the ff* tools will display the list of all the supported bitstream filters included in your build. The ff* tools have a -bsf option applied per stream, taking a comma-separated list of filters, whose parameters follow the filter name after a '='. ffmpeg -i INPUT -c:v copy -bsf:v filter1 [=opt1=str1:opt2=str2] [,filter2] OUTPUT Below is a description of the currently available …

FFmpeg Filters Documentation

https://ffmpeg.org/ffmpeg-filters.html

Apply spectral tilt filter to audio stream. This filter apply any spectral roll-off slope over any specified frequency band. The filter accepts the following options: freq. Set central frequency of tilt in Hz. Default is 10000 Hz. slope. Set slope direction of tilt. Default is 0. Allowed range is from -1 to 1. width. Set width of tilt. Default is 1000.

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