obtener imágenes, audio y video de internet
TRANSCRIPT
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CÓMO OBTENER IMÁGENES, AUDIO Y VÍDEO DE INTERNET
CPR GIJÓN, 13 NOVIEMBRE 2009 - CARMEN LÓPEZ JIMÉNEZ
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Flickr y Creative CommonsResolución y tamaño de impresiónFormatos de imagenAudio y vídeo podcastsGoogle readerAudio y vídeo en streamingFormatos de vídeoRecodificar vídeos de flv a aviExtraer el audio de un vídeo
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Imágenes de Flickr
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Imágenes de Flickr
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Foto de Juanjominor
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Gracias a Flickr y Creative Commons podemos utilizar miles de fotografías y dibujos de forma gratuita, respetando los derechos de los autores.
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Id a la página de Flickr.Buscad imágenes sobre un tema que os pueda
ser de utilidad para clase.Limitad la búsqueda a las imágenes
publicadas con licencia Creative CommonsDescargad el tamaño pequeño y el grande
ACTIVIDAD 1
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Tamaño y resolución en la imagen digital
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la imagen digital está formada por pixeles
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cuántos mas pixeles tenga una imagen
mayor será el archivo
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al disminuir el tamaño de impresión aumenta la
resolución
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al aumentar el tamaño de impresión disminuye la
resolución
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Foto de Jose Antonio Carretero
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la resolución óptima de una imagen depende del destino
que vayamos a darle
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72 - 100 ppp
+ 300 ppp
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Formatos de Imagen
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JPG
GIFPNG
BMP
TIFF
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Abrid con Fireworks las dos imágenes grande y pequeña que descargasteis de Flickr.
Comparad tamaños en pixeles, tamaños de impresión y resolución.
En la mayor disminuid el tamaño de impresión, desactivando la opción de remuestrear la imagen y observad como aumenta la resolución
Optimizad la imagen para un ancho de impresión de 6 cm a una resolución de 300 ppp
ACTIVIDAD 2
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Guardad la imagen Cerradla descartando cambiosVolved a abrirla y esta vez dejáis el tic en
remuestrear imagen. Poned un ancho de impresión de 6 cm y fijaos
como disminuyen los pixeles y la resolución permanece igual.
Guardadla Abrid las dos imágenes y haced zoom sobre ellas
para ver la diferencia
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Audio y video Podcasts
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Definición de Wikipedia
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Buscad con la ayuda de Google una página que ofrezca podcasts (cualquier cadena de radio-tv o periódico) y os subscribís usando los marcadores dinámicos de Firefox.
Escoged un episodio y haciendo clic derecho > “Guardar enlace como ... “ empezad a descargarlo.
¡Cancelad la descarga para no saturar la red!!
ACTIVIDAD 3
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¿subscribirnos o sólo descargar?
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Subscripción: un periódico multimedia a
medida
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Con Google reader tenemos...
las novedades que nos interesansiempre actualizadasen distintos formatosaccesibles desde cualquier ordenador
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ACTIVIDAD 4
Id a Google reader y haceos una cuentasubscribíos a unos cuantos páginas
que os interesen y organizar las subscripciones en carpetas.
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Audio y video en streaming
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Definición de Wikipedia
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Cómo instalar Video DownloadHelper
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y así es como funciona ...
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ACTIVIDAD 5
Utilizad Video DownloadHelper para descargar un archivo de audio o de video
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ACTIVIDAD 6
Utilizad Keepvid para descargar un video en streaming de una página de intercambio de vídeos como YouTube, Googlevideo, DailyMotion ....
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Formatos, Codecs y Reproductores
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FLVMP4
MP3M4V
MOVRM
WMV
WMA
SWFVOB
WAVMPEGAVI
DIVX XVID
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WMVWMA
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M4VMOV
WMVWMA
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M4VMOV
RMWMVWMA
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MP4MP3
M4VMOV
RMWMVWMA
VOB
WAVMPEG
AVI
DIVXXVID
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FLV
MP4MP3
M4VMOV
RMWMVWMA
VOB
WAVMPEG
AVI
DIVXXVID
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FLV
MP4MP3
M4V
MOV
RM
WMVWMA
VOB WAV
MPEG
AVIDIVX
XVID
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¿y si mi video no tiene extensión?
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ACTIVIDAD 7
Comprobad que el ordenador que estáis utilizando muestra las extensiones de los archivos y si no es así configuradlo para que las muestre.
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recodificar videos flv a avi con super
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ACTIVIDAD 8
Con Super, recodificad el archivo FLV que descargasteis a avi, utilizando DivX como codec de vídeo y mp3 como codec de audio.
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Extraer el audio mp3 de un vídeo flv o avi
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ACTIVIDAD 9
Extraed el audio en mp3 del archivo de vídeo FLV que descargasteis.
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¡Muchas Gracias!