How can we know if a WAV file contains Audio or not in Android.
Is there any way in Android to find if a WAV file stored on SD contains audio.
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I am trying to make single wav audio file from multiple byteArray of wav streaming data. But only first file playing. What I guess is, need to make new header for the resulting wav file.
How to make the header for the resulting wav file from multiple byteArray?
We're trying to upload playable audio files from PowerApps mic to SharePoint Online list.
I have used the following line:
Patch(sharepointlistname, ForAll(Gallery1.AllItems,{Title:Title, VoiceMessage:Audio});
The above returns the following results:
(from Android and iPhone, .aac and .caf links (respectively) to SharePoint List):
data/bb788abd-7848-449f-810b-2bd6368dcb19.aac
or
temp/recording_8BA1187E-158A-469E-9994-F644C6F619D8-1610-000001A0FBF5F1F0.caf
It seems impossible to convert these .aac and .caf to .wav or any playable file.
Can someone guide me on this, or maybe let me know where the actual audio files are being saved to from powerapps? The .aac or .caf links are most likely references to a specific location on a local database that is created by PowerApps. Unfortunately, I have not found any information.
aac files and caf files are audio files. They are not just your regular and familiar wav or mp3 files.
Both formats can be played by Quicktime.
You can find a list of all the programs that can play those formats here:
http://extension.nirsoft.net/caf
http://extension.nirsoft.net/aac
I am able to convert the .amr file to the .wav file by adding the required header info to the newly created file i.e. example.wav file, but unable to convert the .flac file to .wav file properly however I get the .wav file which plays for the same time for which it was recorded but plays the noise sound as bad Channel signal on Radio instead of recorded voice. Please help me to fix this issue. Thanks
Both the files have been written data in different format so only copying the headers is not the solution, you will have to do proper decoding from flac to pcm and then will have to add headers and store the bytes from pcm to wav file.
I am using JCodec for android for encoding an mp4 video starting from a set of images. It works and I obtain an mp4 file. Now, I would like to add an audio trace. Unfortunately, JCodec does not support audio encoding. So, somebody suggest to solve this problem as follows:
"Jcodec doesn't have the capability to encode audio (AAC) so you can encode your audio elsewhere and then add it to you mp4 file."
Any advice on how to "add" the mp3 file to the mp4 file?
I'm trying to use the AudioRecord class to record a WAV file. The problem is that it only supplies the raw PCM data, and if I write it to a file, there is no header information, so it will not play in any media player. How can I create a WAV file from this raw data?
Or alternatively, is there any other way to record sound in Android to a WAV file (or, alternatively MP3)?
Oh, and I know that MediaRecorder can'y be used because it doesn't support either WAV or MP3 formats.
OK, I've got this figured out. This post was crucial in helping me:
http://computermusicblog.com/blog/2008/08/29/reading-and-writing-wav-files-in-java
Basically, I used ByteArrayOutputStream to write the raw PCM data from AudioRecord, which then lets me get the byte array and its size when the process is done. I can then use that data in conjunction with the SampleRate, BitRate, and Stereo/Mono settings to create the WAV header as per the link above. The resulting file works perfectly!
Check the MediaRecorder.setOutputFormat(), you can set different container formats for your recording; there is MediaRecorder.OutputFormat.MPEG_4 and MediaRecorder.OutputFormat.THREE_GPP; the only allowed format along RAW is setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
Sorry but MP3 is not avail. You really need mp3 for recording?
WAV on the opposite of MP3 is a container, not a format; WAV can be any kind of encoding format.
You are always free to prepend some WAV RIFF header in front of your raw pcm data (as long as you exactly know the format). Check here for how it has to look like:
http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/WAVE.html
You may want to use mediarecord class