Use FFmpeg to audio format and sample rateImportOSImportstringImportsubprocess as SP#Full path of FFmpegFfmpeg_bin ="/users/karl/documents/python/audio/tool/ffmpeg"#Full path of SourceDirSourceDir ="/users/karl/documents/python/audio/"#Full path of TargetDirTargetDir ="/users/karl/documents/python/newdir/"#Sample FrequencySF = 11025#Extension Settingext ='mp3'def
First of all, this method is really very cow, it is better to ingenious:
In this app to do foodie, because we need to add a button on the UITableViewCell, when you click on this button to start playing audio (while the button status changed to selected), these processing is OK, But now the problem is that when the audio playback is complete, a proxy method is triggered (that is, telling the
necessary theory should be a bit more! Let's talk about the audio preliminary.
Audio preliminary (1)
Audio: audio in English. You may see the audio output or input port on the video recorder or vcd backplane. In this way, we
Audio
Mobile phone audio and video 3-local video list, audio and video 3-list
1. Write layout relative layout: ListView, TextView, and ProgressBar, initialization
1 Video_pager.xml
2. Load the local video, load the video in the Child thread, and load the video into the collection; set the adapter to be in the main thread; Use Handler to set the adapter
1 public class VideoPager extends BasePager {2 3 private Lis
Based on the analysis in the previous article, you need to implement several functions declared in aaccodechelper. H, as follows:
# Include "aaccodechelper. H"# Include "faac. H"Ulong nsamplerate = 11025; // Sampling RateUint nchannels = 1; // number of audio channelsUint npcmbitsize = 16; // number of single-sample digitsUlong ninputsamples = 0;Ulong nmaxoutputbytes = 0;Faacenchandle hencoder;Faacencconfigurationptr pconfiguration;Byte * pbpcmbuffer;
What should I do if my computer's speakers, headphones, and audio devices have no sound ?, Speaker audio device
Computer speakers, headphones with no sound inserted. I have not changed to mute. Why is there no sound? How can I set up a playback device in Windows 7? If I check whether headphones and audios are correct. Let's take a look at how to set the playing device of the system.
If the taskbar's horn
Js implements the audio control progress bar function, and js implements the audio progress bar
:
The Code is as follows:
The above is all the content of this article. I hope this article will help you in your study or work. I also hope to provide more support to the customer's home!
1, pop-up "audio and video Information" window, open Task Manager will find that there is a KKTIP.EXE process, the end of the process, the pop-up window is not the explanation is kktip caused, it is thunder audio-visual
2, C-Disk direct search Kktip will find in the path C:userspublicvideo Legendrbcprogram, so we want to delete the C:userspublic path under the video legend the entire folder, delete the ti
The program realizes the function of playing ok.wav under Linux. The program first calls the Fstat function to obtain file-related information (primarily file size information). Allocates the specified memory space through the malloc function and reads the online.wav into memory, then opens the sound card device file, sets the sound card parameters, and then calls the Write function to complete the playback of the file.A brief example of the code is as follows:#include Linux under
Let's take the example of BT box as the following demo, because the BT box is the source of the seed.
First step
First to open the BT box seed search artifact, as we find: the Pacific Rim then there will be a lot of resources:
Second Step
Select the resource we want to see right-click the movie, and then select Copy Play address from the pop-up menu, as shown in Figure 2:
Step Three:
Copy good playback address, now we find in the computer "Baidu
Based on the analysis of the FLV format in the previous article, the FLV format includes file header and file body. Therefore, you can define file header and previous tag size #0 as follows:
Const static unsigned char flvfilehdr [] = {0x46, 0x4c, 0x56, 0 x, 0 x, 0 x, 0 x, 0 x, 0 x, 0 x, 0 x, 0x00};
The file body consists of the tag header and tag data. Therefore, the tag header can be defined as follows:
Unsigned char flvtaghdr [] = {0 x, 0 x, 0 x, 0 x, 0 x, 0 x, 0 x, 0 x, 0 x, 0 x, 0x00};
Note:
Cocos2dx audio module analysis (5): cocos2dx Audio Effect
Cocos2dx audio module analysis (5): Audio Effect
The preload and playback functions of the sound effect section analyzed in the previous article. This article analyzes other functions: 1. Pause the sound effect in a video. // note that nSoundId is not a java-si
. After the data is fetched, it is stored in the local server and forwarded to Avaudioplayer. Another way to compare trick is to first download the audio to a file, after downloading to a certain amount of data to the file path to Avaudioplayer playback, of course, this practice after the audio seek back a problem. );
If you are developing a professional music playback
audio playback, no other requirements avfoundation will be good to meet your needs. Its interface is simple to use, do not care about the details;
If you are developing a professional music playback software that requires sound effects (equalizer, reverb), you need to use Audioconverter to convert audio data to PCM data in addition to data reading and pars
{Code...} cannot call wx. stopVoice interface when the current page is left? What should I do to stop playing audio when I leave the page?
$ (Window). bind ('beforeunload', function () {if (localId) {wx. stopVoice ({localId: localId });}});
The wx. stopVoice interface cannot be called when the current page is left? What should I do to stop playing audio when I leave the page?
Reply content:
$ (Window).
The first three articles have explained in detail how to convert the WAV audio format to the FLV format. This article describes how to convert the last part, first, the AMR is converted into WAV format, and then the WAV format is encapsulated
FLV format. The key part of this article is the part in the while loop. The other part can be skipped. The function d_if_decode (St, serial, synth16, _ good_frame ); the function is to encode a frame of AMR data
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