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توضیحات

Generate image stack representing audio

ویژگی	مقدار
سیستم عامل	-
نام فایل	audio_display-0.1.0
نام	audio_display
نسخه کتابخانه	0.1.0
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	Olivier Jolly
ایمیل نویسنده	olivier@pcedev.com
آدرس صفحه اصلی	https://gitlab.com/zeograd/audio-display
آدرس اینترنتی	https://pypi.org/project/audio_display/
مجوز	GPLv3+

audio-display ============= **audio-display** is a set of utility aimed at rendering images based on audio input. It aims at generating images to produce visual "companion" to audio files. Typically to create a video clip supporting a musical composition. fft2png ------- **fft2png** is a command line utility to create a set of image files representing audio spectrum from a wav file. It is an offline version of a spectrum analyser output and is not totally dissimilar to `Sonic Candle`_. Generated files can be imported and postprocessed in any video edition tool accepting a set of images as input. Just make sure that the framerate used during the call to **fft2png** matches the framerate at which you consume images in your video edition software. Libre software able to consume and use those images includes, but aren't limited to, Natron_. You can also use FFmpeg_ for either previewing quickly or for simple needs (just the spectrum over a fixed image or a video. Some samples of `ffmpeg usage`_ can be found later. Usage ..... usage: fft2png [-h] [-d] [-n] [-r TARGET_FPS] [-R {0,1,2,3}] [-v] [-w BAR_WIDTH] [-s BAR_SPACING] [-c BAR_COUNT] [-C COLOR] [-b BLENDING] [-W FFT_WINDOW] [--image-height IMAGE_HEIGHT] [--audio-min-freq AUDIO_MIN_FREQ] [--audio-max-freq AUDIO_MAX_FREQ] [--silence-ceiling SILENCE_CEILING] [-i INPUT_FILENAME] -o OUTPUT_FILENAME_MASK GPL v3+ 2015 Olivier Jolly optional arguments: -h, --help show this help message and exit -d, --debug debug operations [default: False] -n don't perform actions [default: False] -r TARGET_FPS, --framerate TARGET_FPS output framerate [default: 30] -R {0,1,2,3}, --renderer {0,1,2,3} which renderer to use to display bars (0=filled, 1=hollow, 2=symetrical filled, 3=symetrical hollow) -v, --version show program's version number and exit -w BAR_WIDTH, --bar-width BAR_WIDTH bar width in output images -s BAR_SPACING, --bar-spacing BAR_SPACING bar spacing in output images -c BAR_COUNT, --bar-count BAR_COUNT number of bars in output images -C COLOR, --color COLOR hexa color of bars [RRGGBB or RRGGBBAA, default: FFFFFFFF] -b BLENDING, --blending BLENDING blending of previous spectrum into current one (0 = display only fresh data, 1 = use as many previous than fresh data) -W FFT_WINDOW, --window FFT_WINDOW window size for FFT [default: 4096] --image-height IMAGE_HEIGHT output images height --audio-min-freq AUDIO_MIN_FREQ min frequency in input audio --audio-max-freq AUDIO_MAX_FREQ max frequency in input audio --silence-ceiling SILENCE_CEILING opposite of threshold considered silence [in dB, default: 70] -i INPUT_FILENAME input file in wav format -o OUTPUT_FILENAME_MASK output filename mask (should contain {:06} or similar to generate sequence) Convert audio file to stack of images **-r** Framerate of the generated images. Should match the framerate at which they will be consumed. Higher framerate gives a smoother result. **-R** Aspect of the bar representing power for one frequency. 0 uses filled boxes, 1 uses hollow boxes, 2 uses filled boxes vertically centered and 3 uses hollow boxes vertically centered. **-w** Width (in pixel) per bar. **-s** Spacing (in pixel) between bars. **-c** Number of bars per images. **-C** Color of the bars in hexa. Can be RGB or RGBA. For instance, FF0000 will render pure opaque red bars, 00FF0080 will render 50% transparent pure green bars, ... **-b** Blending ratio from previous frame into current one. When set to 0, only fresh data will be used to render bars. When set to 1, bars will be rendered from an average of the fresh and previous frame data. Intermediate values will inject a fraction of the previous frame data into the current one for rendering. Lower values tends to render more reactive spectrum while higher ones will smooth data over time and react slower. **-W** Spectrum generation window is the amount of data in the audio file used to determine the spectrum raw data. Lower value will make spectrum blockier but will be slightly faster to generate. Example ....... To use default values when generating spectrum, just invoke:: fft2png -i input.wav -o output-{:06}.png `result of default fft2png settings`_ For a slightly different result, you can invoke it like this:: fft2png -R2 -w4 -s4 -c30 -C FF8080A0 --audio-min-freq 100 -i input.wav -o output-{:06}.png You'll end up with 30 symetrical transparent redish solid bars 4 pixels wide, spaced by 4 pixels `result of red solid symetrical bars ff2png settings`_ **** FFMpeg usage ............ .. _ffmpeg usage: If you already have a video as background and want to add spectrogram center on it while adding some musique, you can invoke ffmpeg like this:: ffmpeg -i <background_video.mp4> -framerate <generated frames framerate> -i <audio-00%4d.png> -filter_complex "overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2:shortest=1" -i <music.wav> -map 2:0 -vframes <number of generated frames> -strict -2 <output.mp4> -y where : * <background_video.mp4> is the filename of your background video * <generated frames framerate> is the framerate used when generating spectrogram frames * <audio-00%4d.png> is the mask of the generated frames to overlay * <music.wav> is the filename of the your music * <number of generated frames> is, well, the number of generated spectrogram frames * <output.mp4> is the generated muxed video A few notes : * you can change the overlay position by setting the position in absolute coordinates or using some maths with main_w, main_h, overlay_w, overlay_h as show here * **-y** is for overwriting the result file * **-strict -2** alleviates some error with aac encoding on my version/system combo * the background video will not loop. As for now (ffmpeg 3.0.1), looping is not for video. If your video is too short, prepare one which is long enough by concatenating it several times. The **shortest=1** in the filter expression will stop whenever an input stream (background video, spectrogram images or music) reaches its end. * use the ffmpeg manual, Luke If you want to use a static image as background, the invocation becomes something like:: ffmpeg -loop 1 -i <background_image.jpg> -framerate <generated frames framerate> -i <audio-00%4d.png> -filter_complex "overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2:shortest=1" -i <music.wav> -map 2:0 -vframes <number of generated frames> -strict -2 <output.mp4> -y The main difference being the **-loop 1** to loop the background image over and over until one of the other stream ends. Installation ------------ **audio-display** is installable from PyPI with a single pip command:: pip install audio-display Alternatively, **audio-display** can be run directly from sources after a git pull (recommended if you want to tweak or read the source):: git clone https://gitlab.com/zeograd/audio-display.git cd audio-display && python setup.py install or directly from its git repository:: pip install git+https://gitlab.com/zeograd/audio-display.git .. _Sonic Candle: http://soniccandle.sourceforge.net/ .. _Natron: http://natron.fr .. _FFmpeg: http://ffmpeg.org .. _result of default fft2png settings: https://i.imgur.com/hrc0YRv .. _result of red solid symetrical bars ff2png settings: https://imgur.com/e0hy5qG

نحوه نصب

نصب پکیج whl audio_display-0.1.0:

pip install audio_display-0.1.0.whl

نصب پکیج tar.gz audio_display-0.1.0:

pip install audio_display-0.1.0.tar.gz