Foreword
Android was acquired in the video information achieved mainly rely MediaMetadataRetriever
Get the best video preview
So-called best is MediaMetadataRetriever own calculations
/ ** * Get video thumbnail * @param vedioFile * @return * / public static Bitmap getVedioThumbnail (File vedioFile) { IF (! {VedioFile.exists ()) Le ( "video file does not exist" ); return null ; } Retriever. MediaMetadataRetriever is = new new . MediaMetadataRetriever is (); retriever.setDataSource (vedioFile.getAbsolutePath ()); Bitmap Bitmap = retriever.getFrameAtTime (); return Bitmap; }
If your video file is a file in assets
Adf = context.getAssets AssetFileDescriptor () openFd (vedioFile.getAbsolutePath ());. // If the file is a video app assets directory retriever.setDataSource (adf.getFileDescriptor ());
Obtaining video preview time position specified in FIG.
/ ** * Get video thumbnail * @param vedioFile * @return * / public static Bitmap getVedioThumbnail (File vedioFile) { IF (! {VedioFile.exists ()) Le ( "video file does not exist" ); return null ; } Retriever. MediaMetadataRetriever is = new new . MediaMetadataRetriever is (); retriever.setDataSource (vedioFile.getAbsolutePath ()); Bitmap Bitmap = retriever.getFrameAtTime (1000); // parameter milliseconds, return frame is close to the time of FIG return Bitmap; }
Length get video play
/ ** * return the total length video playback * @param vedioFile * @return * / public static Long getVedioTotalTime (File vedioFile) { IF (! VedioFile.exists ()) { Le ( "video file does not exist" ); return null ; } . MediaMetadataRetriever is Retriever = new new . MediaMetadataRetriever is (); retriever.setDataSource (vedioFile.getAbsolutePath ()); String TimeString = retriever.extractMetadata (MediaMetadataRetriever.METADATA_KEY_DURATION); Long Time= Long.valueOf(timeString); return time; }
Additional information refer to Table
/ **
* metadata key, numeric strings described for retrieving
* sequential recording original audio data source.
* /
Public static Final int METADATA_KEY_CD_TRACK_NUMBER = 0 ;
/ **
metadata key is used to retrieve information about the album title, the data source.
* /
Public static Final int METADATA_KEY_ALBUM =. 1 ;
/ **
metadata key, to retrieve information about the artist of the data source.
* /
Public static Final int METADATA_KEY_ARTIST = 2 ;
/ **
metadata key, for retrieving data about the source of information.
* /
Public static Final int=. 3 METADATA_KEY_AUTHOR ;
/ **
metadata key, to retrieve information about the composer data source.
* /
Public static Final int METADATA_KEY_COMPOSER =. 4 ;
/ **
for retrieving metadata key create a data source or modify date.
* /
Public static Final int METADATA_KEY_DATE =. 5 ;
/ **
metadata key, content type, or the type of resource for retrieving data.
* /
Public static Final int METADATA_KEY_GENRE =. 6 ;
/ **
for retrieving the data source metadata key header.
* /
Public static Final int METADATA_KEY_TITLE. 7 =;
/ *
Metadata key, for retrieving the data source to create or modify the year.
* /
Public static Final int METADATA_KEY_YEAR =. 8 ;
/ **
metadata key, play duration for retrieving data source.
* /
Public static Final int METADATA_KEY_DURATION =. 9 ;
/ **
for retrieving the track number of the metadata key, such as audio, video, text, data source, such as mp4 file or 3gpp.
* /
Public static Final int METADATA_KEY_NUM_TRACKS = 10 ;
/ **
for the metadata key (e.g. OF words) of data sources to retrieve information.
* /
Public static Final int METADATA_KEY_WRITER. 11 =;
/ **
* retrieval mime type of the data source metadata keys. Some
examples of mime type comprising: "Video / MP4", "Audio / MP4", "Audio / AMR- WB", etc.
* /
public static Final int METADATA_KEY_MIMETYPE = 12 is ;
/ **
metadata key for retrieving information about performers information on
the artist associated with the data source.
* /
Public static Final int METADATA_KEY_ALBUMARTIST = 13 is ;
/ **
metadata key, for retrieving the digital string descriptor which
part of the audio data from the source.
* /
Public static Final int METADATA_KEY_DISC_NUMBER = 14 ;
/ **
For retrieving music album editing status of metadata keys.
* /
Public static Final int METADATA_KEY_COMPILATION = 15 ;
/ **
* If this key is present, then the media containing the audio content.
* /
Public static Final int METADATA_KEY_HAS_AUDIO = 16 ;
/ **
If this key is present, then the media containing the video content.
* /
Public static Final int METADATA_KEY_HAS_VIDEO =. 17 ;
/ **
If the media contains video, this key will retrieve its width.
* /
Public static Final int METADATA_KEY_VIDEO_WIDTH = 18 is ;
/ **
If the media including video, this key will retrieve its height.
* /
Public static Final int METADATA_KEY_VIDEO_HEIGHT =. 19 ;
/ **
* This key retrieves average bit rate (in bits / seconds) (if available).
* /
Public static Final int METADATA_KEY_BITRATE = 20 is ;
/ **
This key retrieved text track language code (if any). If a plurality of tracks present text, the return value will be shown as follows:
* /
public static Final int METADATA_KEY_TIMED_TEXT_LANGUAGES = 21 is ;
/ **
If this key is present, then the media is protected.
* /
Public static Final int METADATA_KEY_IS_DRM = 22 is;
/ *
This key retrieve location information (if any).
The position of the ISO shall assign a mp4 / 3gp box "@xyz" -6709 standard. Longitude - 90 degrees and latitude
, for example, 180 degrees would be retrieved as " -90.0000 + 180.0000 ."
* /
Public static Final int METADATA_KEY_LOCATION = 23 is ;
/ **
This is a key to retrieve video rotational angle of the unit (if available).
Video rotation angle may be 0 degrees, 90 degrees, 180 degrees or 270 degrees.
* /
Public static Final int METADATA_KEY_VIDEO_ROTATION = 24 ;
/ **
* This key to retrieve the original capture frame rate (if it is) available. Capture frame rate will be a floating-point number.
* /
Public static Final int= 25 METADATA_KEY_CAPTURE_FRAMERATE ;
/ **
If the key exists, the media content comprising still image.
* /
Public static Final int METADATA_KEY_HAS_IMAGE = 26 is ;
/ **
* If the media contains a still image, this key will retrieve the number of still images.
* /
Public static Final int METADATA_KEY_IMAGE_COUNT = 27 ;
/ **
* If the media contains a still image, the key index to retrieve the main picture.
* /
Public static Final int METADATA_KEY_IMAGE_PRIMARY = 28 ;
/ **
* If the media contains a still image, retrieves the key width of the main image.
* /
public static Final int METADATA_KEY_IMAGE_WIDTH = 29 ;
/ **
* If the media contains a still image, this image height of the main key retrieved.
* /
Public static Final int METADATA_KEY_IMAGE_HEIGHT = 30 ;
/ **
* If the media contains still images, the angle of rotation of the key to retrieve the main picture (clockwise). The image must be one of the rotational angle 0 degrees, 90 degrees, 180 degrees or 270 degrees.
* /
Public static Final int METADATA_KEY_IMAGE_ROTATION = 31 is ;
/ **
* If the media contains video and this key is present, total number of frames in a video sequence is retrieved.
* /
Public static Final int METADATA_KEY_VIDEO_FRAME_COUNT = 32;