Im trying to get mimetype of video files using below code.
Porblem: I have a file saved as audio but its mimetype is video/3gpp and it is also playing
as Audio. . How to detect this kind of file which is audio but mimetype is video/3gpp in its
details so i can exclude it from list.
fun getFileMimeType(url: String): String {
var type: String = ""
try {
if (url.lastIndexOf(".") != -1) {
val ext: String = url.substring(url.lastIndexOf(".") + 1)
val mime = MimeTypeMap.getSingleton()
type = mime.getMimeTypeFromExtension(ext)!!
}
} catch (e: Exception) {
}
return type
}
Assuming this is a local file, you can use MediaMetadataRetriever to get Metadata information about the media file.
Specifically, you can check if the METADATA_KEY_HAS_VIDEO is set to true.
An example in Kotlin:
val metadataRetriever = MediaMetadataRetriever()
metadataRetriever.setDataSource(context, Uri.fromFile(your3GPPFile))
val hasVideoKey = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO)
if (hasVideoKey == "yes") {
//Include in your list or do whatever work
//you need here
}
You can also use ExoPlayer and load the file, and then get a list of the tracks using
player.getCurrentTrackGroups()
This will return an array of tracks which you can loop through and parse the format to check if they include a video track.
Related
I am getting some audio streaming data as base64 String, I convert it in byteArray and then write a file locally as mp3 file to play in mediaplayer. But the problem is mediaplayer througing error(1,-2147483648). How to solve this, I tried with many SO posts but nothing works.
**what I am trying to do is fetch base64 string save locally and play**.
val file = requireContext().getExternalFilesDir(null)?.absolutePath + "/audioRecording1.mp3"
val mediaPlayer = MediaPlayer()
try {
val output = FileOutputStream(file)
output.write(mp3SoundByteArray)
output.close()
val fis = FileInputStream(file)
mediaPlayer.setDataSource(fis.fd)
fis.close()
mediaPlayer.setAudioAttributes(
AudioAttributes.Builder().
setContentType(AudioAttributes.CONTENT_TYPE_MUSIC).
setUsage(AudioAttributes.USAGE_MEDIA).
build())
mediaPlayer.prepareAsync()
mediaPlayer.setOnPreparedListener {
mediaPlayer.start()
}
mediaPlayer.setOnErrorListener { mediaPlayer, i, i2 ->
Log.v("","${i,i2}")
true
}
}catch (e:Exception){
toast(e.message!!)
}
could you please tell me how to overcome this?
I am not sure, but it seams that you have trouble with file saving
fun saveFile(responseBody: ResponseBody?, pathWhereYouWantToSaveFile: String) {
val body = responseBody ?: return
var input: InputStream? = null
try {
val uri = Uri.parse(pathWhereYouWantToSaveFile)
input = body.byteStream()
val parcelFileDescriptor =
context.getContentResolver().openFileDescriptor(uri, FileConst.WRITE_MODE)
val fileOutputStream = FileOutputStream(parcelFileDescriptor?.fileDescriptor)
fileOutputStream.use { output ->
val bufferSize = BUFFER_SIZE.toInt()
val buffer = ByteArray(bufferSize)
var read: Int
while (input.read(buffer).also { read = it } != END_OF_FILE) {
output.write(buffer, START_OFFSET, read)
}
output.flush()
}
} catch (exception: Exception) {
logErrorIfDebug(exception)
} finally {
input?.close()
}
}
const val READ_MODE = "r"
const val WRITE_MODE = "w"
const val START_OFFSET = 0
const val END_OF_FILE = -1
const val BUFFER_SIZE = 4 * BYTES_IN_KILOBYTE
Try this in your viewModel or data sourse layer, then send result to UI layer and use there
Have you checked that your file saved correct? You can go to directory and try to open file. If everything okey, you can get it by uri in your media player.
Also you should check - perhaps you are creating another path for save and retrieve
Better way to use player is https://exoplayer.dev/
But native library also can work with internal uri path.
If you just take a random part of a base64 encoded audio stream then your bytearray will (after decoding) contain a part of an audiofile.
Some audio stream bytes.
Not a complete valid mp3 file with headers and such.
If you had said: am getting a mp3 file in one base64 String then your approch would be ok.
I have solved the issue without writing any header. below way.
val clipData =android.util.Base64.decode(data,0)
val output = FileOutputStream(file,true)
output.write(clipData)
output.close()
I am trying to create an android app with kotlin, this app need to have a mini download manager as I will need to download files from 100MB to 8GB and user can pause and resume download later when the server supports the pause, searching I found the Ktor library and reading the documentation plus some videos on youtube, I managed to write a base code where I could download the files and make the process of stopping the download and keep going all right when one of mine tests gave error there are files whose url pattern is: http://server.com/files?file=/10/55/file.zip
The problem is that I put this link, but Ktor converts to http://server.com/files?file=%2F10%2F55%2Ffile.zip this generate an error response on the server, as I don't have access to the server to change this rule I need to send the right url without encoding. Does anyone know how to do this? Prevent Ktor from doing a URL_encode in the url parameters, I couldn't find anything in the documentation
My code is this:
ktor-client version 1.6.7
fun startDownload(url: String, auth: String = "", userAgentS: String = "", fileName: String = ""){
val client = HttpClient(CIO)
val path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
val file = File.createTempFile("File", "index", path)
runBlocking {
client.get<HttpStatement>(url){
headers {
append(HttpHeaders.Authorization, auth)
append(HttpHeaders.UserAgent, userAgentS)
append(HttpHeaders.Range, "bytes=${file.length()}-")
}
}
.execute { httpResponse ->
val channel: ByteReadChannel = httpResponse.receive()
while (!channel.isClosedForRead) {
val packet = channel.readRemaining(DEFAULT_BUFFER_SIZE.toLong())
while (!packet.isEmpty) {
val bytes = packet.readBytes()
file.appendBytes(bytes)
println("Received ${(file.length())} bytes from ${httpResponse.contentLength()}")
}
}
val pathF = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS + "/${fileName}")
file.renameTo(pathF)
println("A file saved to ${file.path}")
}
}
}
Can anyone help me solve this problem with ktor, if there is no solution, can someone tell me another way to achieve the same goal? Need to be with Kotlin.
update 2022-02-17
Thanks to Aleksei Tirman's help I managed to solve the problem, thank you very much. And the base code looks like this:
fun startDownload(url: String, auth: String = "", userAgentS: String = "", fileName: String = ""){
val client = HttpClient(CIO)
val path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
val file = File.createTempFile("File", "index", path)
runBlocking {
client.get<HttpStatement>(url){
url {
parameters.urlEncodingOption = UrlEncodingOption.NO_ENCODING
}
headers {
append(HttpHeaders.Authorization, auth)
append(HttpHeaders.UserAgent, userAgentS)
append(HttpHeaders.Range, "bytes=${file.length()}-")
}
}
.execute { httpResponse ->
val channel: ByteReadChannel = httpResponse.receive()
while (!channel.isClosedForRead) {
val packet = channel.readRemaining(DEFAULT_BUFFER_SIZE.toLong())
while (!packet.isEmpty) {
val bytes = packet.readBytes()
file.appendBytes(bytes)
println("Received ${(file.length())} bytes from ${httpResponse.contentLength()}")
}
}
val pathF = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS + "/${fileName}")
file.renameTo(pathF)
println("A file saved to ${file.path}")
}
}
}
You can disable query parameters encoding by assigning the UrlEncodingOption.NO_ENCODING value to the urlEncodingOption property of the ParametersBuilder. Here is an example:
val requestBuilder = HttpRequestBuilder()
requestBuilder.url {
protocol = URLProtocol.HTTP
host = "httpbin.org"
path("get")
parameters.urlEncodingOption = UrlEncodingOption.NO_ENCODING
parameters.append("file", "/10/55/file.zip")
}
val response = client.get<String>(requestBuilder)
I want to send multiple images to my database using retrofit. I am using this code to select multiple images.
private val galleryLauncher =
registerForActivityResult(ActivityResultContracts.GetMultipleContents()) { list ->
//TODO convert all content uris to File
}
I have tried a bunch of image picker libraries but none of them works in my device (Android R).
How do I convert them to file? Please help.
Is there any other method to send images to server via Retrofit2?
I used this dependency
implementation "commons-io:commons-io:2.7"
And this method
private fun createFileFromUri(name: String, uri: Uri): File? {
return try {
val stream = context.contentResolver.openInputStream(uri)
val file =
File.createTempFile(
"${name}_${System.currentTimeMillis()}",
".png",
context.cacheDir
)
FileUtils.copyInputStreamToFile(stream, file) // Use this one import org.apache.commons.io.FileUtils
file
} catch (e: Exception) {
e.printStackTrace()
null
}
}
private val galleryLauncher =
registerForActivityResult(ActivityResultContracts.GetMultipleContents()) { list ->
//TODO convert all content uris to File
}
Background
Android supports various audio files encoding and decoding.
I record audio into an audio file using android.media.MediaRecorder class, but I also wish to show information about the files I've recorded (not standard data, but still just text, maybe even configurable by user), and I think it's best to store this information within the files.
examples of possible data to store: when it was recorded, where it was recorded, notes by the user...
The problem
The MediaRecorder class doesn't have any function that I can find, to add or even read metadata of the recorded audio file.
I also can't find a similar class that does it.
What I've tried
I tried searching how to do it for specific files types, and also tried to find a library that does it.
I haven't find even a clue about this information.
The only thing I've found for MediaRecorder class, is a function called "setLocation" , which is used to indicate where the recording has started (geographically), and looking at its code, I can see it sets parameters:
public void setLocation(float latitude, float longitude) {
int latitudex10000 = (int) (latitude * 10000 + 0.5);
int longitudex10000 = (int) (longitude * 10000 + 0.5);
if (latitudex10000 > 900000 || latitudex10000 < -900000) {
String msg = "Latitude: " + latitude + " out of range.";
throw new IllegalArgumentException(msg);
}
if (longitudex10000 > 1800000 || longitudex10000 < -1800000) {
String msg = "Longitude: " + longitude + " out of range";
throw new IllegalArgumentException(msg);
}
setParameter("param-geotag-latitude=" + latitudex10000);
setParameter("param-geotag-longitude=" + longitudex10000);
}
But setParameter is private, and I'm not sure if it's ok to put anything I want into it, even if I had a way to access it (reflection, for example) :
private native void setParameter(String nameValuePair);
I also don't get, given an audio/video file, how to get/modify this kind of information. It's not available for SimpleExoPlayer, for example.
The questions
How can I read,write, and modify metadata inside supported audio files of Android?
Are there any limitations/restrictions for those actions?
Which file formats are available for this?
Is it possible to add the metadata while I record the audio?
Is it possible perhaps via MediaStore ? But then how do I do those operations? And which files are supported? And does the metadata stay within the file?
EDIT: ok I've looked at the solution offered to me (here, repo here, based on here) , and it seems to work well. However, it doesn't work on latest version of the library that it uses (org.mp4parser.isoparser:1.9.37 dependency of mp4parser) , so I leave this question to be answered : Why doesn't it work on latest version of this library?
Code:
object MediaMetaDataUtil {
interface PrepareBoxListener {
fun prepareBox(existingBox: Box?): Box
}
#WorkerThread
fun <T : Box> readMetadata(mediaFilePath: String, boxType: String): T? {
return try {
val isoFile = IsoFile(FileDataSourceImpl(FileInputStream(mediaFilePath).channel))
val nam = Path.getPath<T>(isoFile, "/moov[0]/udta[0]/meta[0]/ilst/$boxType")
isoFile.close()
nam
} catch (e: Exception) {
null
}
}
/**
* #param boxType the type of the box. Example is "©nam" (AppleNameBox.TYPE). More available here: https://kdenlive.org/en/project/adding-meta-data-to-mp4-video/
* #param listener used to prepare the existing or new box
* */
#WorkerThread
#Throws(IOException::class)
fun writeMetadata(mediaFilePath: String, boxType: String, listener: PrepareBoxListener) {
val videoFile = File(mediaFilePath)
if (!videoFile.exists()) {
throw FileNotFoundException("File $mediaFilePath not exists")
}
if (!videoFile.canWrite()) {
throw IllegalStateException("No write permissions to file $mediaFilePath")
}
val isoFile = IsoFile(mediaFilePath)
val moov = isoFile.getBoxes<MovieBox>(MovieBox::class.java)[0]
var freeBox = findFreeBox(moov)
val correctOffset = needsOffsetCorrection(isoFile)
val sizeBefore = moov.size
var offset: Long = 0
for (box in isoFile.boxes) {
if ("moov" == box.type) {
break
}
offset += box.size
}
// Create structure or just navigate to Apple List Box.
var userDataBox: UserDataBox? = Path.getPath(moov, "udta")
if (userDataBox == null) {
userDataBox = UserDataBox()
moov.addBox(userDataBox)
}
var metaBox: MetaBox? = Path.getPath(userDataBox, "meta")
if (metaBox == null) {
metaBox = MetaBox()
val hdlr = HandlerBox()
hdlr.handlerType = "mdir"
metaBox.addBox(hdlr)
userDataBox.addBox(metaBox)
}
var ilst: AppleItemListBox? = Path.getPath(metaBox, "ilst")
if (ilst == null) {
ilst = AppleItemListBox()
metaBox.addBox(ilst)
}
if (freeBox == null) {
freeBox = FreeBox(128 * 1024)
metaBox.addBox(freeBox)
}
// Got Apple List Box
var nam: Box? = Path.getPath(ilst, boxType)
nam = listener.prepareBox(nam)
ilst.addBox(nam)
var sizeAfter = moov.size
var diff = sizeAfter - sizeBefore
// This is the difference of before/after
// can we compensate by resizing a Free Box we have found?
if (freeBox.data.limit() > diff) {
// either shrink or grow!
freeBox.data = ByteBuffer.allocate((freeBox.data.limit() - diff).toInt())
sizeAfter = moov.size
diff = sizeAfter - sizeBefore
}
if (correctOffset && diff != 0L) {
correctChunkOffsets(moov, diff)
}
val baos = BetterByteArrayOutputStream()
moov.getBox(Channels.newChannel(baos))
isoFile.close()
val fc: FileChannel = if (diff != 0L) {
// this is not good: We have to insert bytes in the middle of the file
// and this costs time as it requires re-writing most of the file's data
splitFileAndInsert(videoFile, offset, sizeAfter - sizeBefore)
} else {
// simple overwrite of something with the file
RandomAccessFile(videoFile, "rw").channel
}
fc.position(offset)
fc.write(ByteBuffer.wrap(baos.buffer, 0, baos.size()))
fc.close()
}
#WorkerThread
#Throws(IOException::class)
fun splitFileAndInsert(f: File, pos: Long, length: Long): FileChannel {
val read = RandomAccessFile(f, "r").channel
val tmp = File.createTempFile("ChangeMetaData", "splitFileAndInsert")
val tmpWrite = RandomAccessFile(tmp, "rw").channel
read.position(pos)
tmpWrite.transferFrom(read, 0, read.size() - pos)
read.close()
val write = RandomAccessFile(f, "rw").channel
write.position(pos + length)
tmpWrite.position(0)
var transferred: Long = 0
while (true) {
transferred += tmpWrite.transferTo(0, tmpWrite.size() - transferred, write)
if (transferred == tmpWrite.size())
break
//System.out.println(transferred);
}
//System.out.println(transferred);
tmpWrite.close()
tmp.delete()
return write
}
#WorkerThread
private fun needsOffsetCorrection(isoFile: IsoFile): Boolean {
if (Path.getPath<Box>(isoFile, "moov[0]/mvex[0]") != null) {
// Fragmented files don't need a correction
return false
} else {
// no correction needed if mdat is before moov as insert into moov want change the offsets of mdat
for (box in isoFile.boxes) {
if ("moov" == box.type) {
return true
}
if ("mdat" == box.type) {
return false
}
}
throw RuntimeException("I need moov or mdat. Otherwise all this doesn't make sense")
}
}
#WorkerThread
private fun findFreeBox(c: Container): FreeBox? {
for (box in c.boxes) {
// System.err.println(box.type)
if (box is FreeBox)
return box
if (box is Container) {
val freeBox = findFreeBox(box as Container)
if (freeBox != null) {
return freeBox
}
}
}
return null
}
#WorkerThread
private fun correctChunkOffsets(movieBox: MovieBox, correction: Long) {
var chunkOffsetBoxes = Path.getPaths<ChunkOffsetBox>(movieBox as Box, "trak/mdia[0]/minf[0]/stbl[0]/stco[0]")
if (chunkOffsetBoxes.isEmpty())
chunkOffsetBoxes = Path.getPaths(movieBox as Box, "trak/mdia[0]/minf[0]/stbl[0]/st64[0]")
for (chunkOffsetBox in chunkOffsetBoxes) {
val cOffsets = chunkOffsetBox.chunkOffsets
for (i in cOffsets.indices)
cOffsets[i] += correction
}
}
private class BetterByteArrayOutputStream : ByteArrayOutputStream() {
val buffer: ByteArray
get() = buf
}
}
Sample usage for writing&reading title:
object MediaMetaData {
#JvmStatic
#Throws(IOException::class)
fun writeTitle(mediaFilePath: String, title: String) {
MediaMetaDataUtil.writeMetadata(mediaFilePath, AppleNameBox.TYPE, object : MediaMetaDataUtil.PrepareBoxListener {
override fun prepareBox(existingBox: Box?): Box {
var nam: AppleNameBox? = existingBox as AppleNameBox?
if (nam == null)
nam = AppleNameBox()
nam.dataCountry = 0
nam.dataLanguage = 0
nam.value = title
return nam
}
})
}
#JvmStatic
fun readTitle(mediaFilePath: String): String? {
return MediaMetaDataUtil.readMetadata<AppleNameBox>(mediaFilePath, AppleNameBox.TYPE)?.value
}
}
It seems there's no way to do it uniformly for all supported audio formats in Android. There are some limited options for particular formats though, so I suggest to stick with one format.
MP3 is the most popular one and there should be a lot of options like this one.
If you don't want to deal with encoding/decoding, there are some options for a WAV format.
There's also a way to add a metadata track to a MP4 container using MediaMuxer (you can have an audio-only MP4 file) or like this.
Regarding MediaStore: here's an example (at the end of page 318) on how to add metadata to it just after using MediaRecorder. Though as far as I know the data won't be recorded inside the file.
Update
I compiled an example app using this MP4 parser library and MediaRecorder example from SDK docs. It records an audio, puts it in MP4 container and adds String metadata like this:
MetaDataInsert cmd = new MetaDataInsert();
cmd.writeRandomMetadata(fileName, "lore ipsum tralalala");
Then on the next app launch this metadata is read and displayed:
MetaDataRead cmd = new MetaDataRead();
String text = cmd.read(fileName);
tv.setText(text);
Update #2
Regarding m4a file extension: m4a is just an alias for an mp4 file with AAC audio and has the same file format. So you can use my above example app and just change the file name from audiorecordtest.mp4 to audiorecordtest.m4a and change audio encoder from MediaRecorder.AudioEncoder.AMR_NB to MediaRecorder.AudioEncoder.AAC.
I have written a c# web service that returns a pdf in a stream of bytes as response. Once I make a call to the web-service from my android app, I will store the response in an array byte till here I will be able to do it. But after that I need to convert that byte array into pdf, I should be able to display that. I have a menu page in which once the button is pressed the call is made to the web service with file name and on click of button I should be able to open pdf. Is this possible? Or there is some other, better solution? I checked on the net for better understanding, but I was unable to find one that could help me understand better.
Thanks for the suggestion, but I don't have the pdf in hand, I just have the array bytes, which I got from the web service. So I now need to regenerate the pdf from this array of bytes and display it, but I am not getting how to do it.
Try following these steps
Convert byte array to InputStream
val inputStream = ByteArrayInputStream(byteArray)
Save InputStream as PDF file:
suspend fun saveInputStreamAsPdfFile(inputStream: InputStream, applicationContext: Context): File? {
var outputFile: File? = null
withContext(Dispatchers.IO) {
try {
val directory = ContextCompat.getExternalFilesDirs(applicationContext, "documents").first()
val outputDir = File(directory, "outputPath")
outputFile = File(outputDir, UUID.randomUUID().toString() + ".pdf")
if (!outputDir.exists()) {
outputDir.mkdirs()
}
val outputStream = FileOutputStream(outputFile, false)
inputStream.use { fileOut -> fileOut.copyTo(outputStream) }
outputStream.close()
} catch (e: Exception) {
// Something went wrong
}
}
return outputFile
}
Show PDF with PdfRenderer
var totalPdfPages: Int
fun showPdf(pdfFile: File) {
val input = ParcelFileDescriptor.open(pdfFile, MODE_READ_ONLY)
val renderer = PdfRenderer(input)
val wrapper = PdfRendererWrapper(renderer)
totalPdfPages = wrapper.getTotalPages()
showPdfPage(0)
}
fun showPdfPage(currentPageIndex: Int) {
val pageBitmap = wrapper.getBitmap(currentPageIndex)
imageView.setImageBitmap(pageBitmap) // Show current page
}