MP4 playback part of the audio format file failure analysis

1. Can the song be downloaded to the digital player and cannot be played?

Cause: Currently, there are many song files in the format, many of which are made in WMA format. You may know that songs in WMA format have a KRM (license) copyright protection measure that allows unauthorized people to play the corresponding songs, so that the interests of the song owner can be well protected.

There are some websites on the Internet that offer WMA songs without license protection. For this song, you can copy and play it like MP3 format songs. However, there are also some websites that only offer protected WMA songs. At this time, on a PC, you may only be able to play it in the WINDOWSMEDIAPLAYS player you obtained (WINDOWSMEDIAPLAYS player is a free play provided by Microsoft. WMA's streaming media playback software, which you can download on many websites, can't be easily copied to another PC without a license, which effectively prevents the spread of songs and protects the owner. Interests.

Workaround: Our digital player also provides the function of playing WMA. When you want to download a WMA song that you have obtained the permission of the corresponding license, please do not directly on the PC. Download the song to the digital player with a simple copy, because the song does not play properly in the digital player. Please open your WINDOWSMEDIAPLAYS player first, in the menu "File", click "Open" to open the WMA song you want to copy first (if you can play it you can download it). Connect our digital player to the PC and a removable disk (such as F:) will appear. At this time, click the “Portable Device” button on the left side of the WINDOWSMEDIAPLAYS player, and the picture will be copied. Here, select on the left. The name of the song you want to copy, then press the "Copy Music" button in the upper left corner and you will copy the corresponding song with the license rights to the digital player correctly. Congratulations, you can carry your favorite WMA songs to any place to listen.

2. Why do some songs have different volume?

Workaround: MP3 songs have different volume, because the middle level adjustment parameters of the recording process are different, so the sound volume is different.

3. Files in the player cannot sometimes be deleted in the management software.

The cause of the failure and its troubleshooting: Usually because the properties of these files are read-only, you can delete the file after you change the properties.

4. Some MP3 songs cannot be played normally in the player.

Causes and troubleshooting methods: In strict sense, MP3 refers to music files compressed by MPEG1, MPEG2, and LAYER3 standards. Most MP3 songs are in this format: in the early days, MPEG1YAYER1 and MPEG1LAYER2 standard compressed MP3 songs. Our player can support multiple formats including WMA, but it is currently not compatible with MPEG1 Layer 1 or Layer 2 compression and a variety of standard mixed MP3 songs. When the player plays this song, it usually Skip the song. When you encounter an MP3 song format that the player cannot be compatible with, you can choose one of the following two measures:

a, remove incompatible songs from the player, and ensure the normal operation of the player. Function

b. When using software to compress itself, please select the encoding method of MPEG1LAYER3.

5. Why does MP3 or MP4 display less than 128MB/512MB/1GB of memory in the computer?

Because MP3/MP4 is written to the player at the factory, these programs take up part of the memory, so the MP3/MP4 displays less than 128MB/512MB/1GB of memory in the computer.

6. Some movies can fast forward, and some can't fast forward?

Because the downloaded source is different, the conversion machine code and bit rate are different. When playing, there may be problems that cannot be fast forwarded.

Solution: Download a movie with moderate bit rate and clarity. Split a movie into 3-5 smaller clips and play it with MP4. Generally, the fast forward problem is not big, even if you press the wrong button. Now, you can quickly enter the specified playback position.

7. A solution to skip and freeze when playing MP3 songs.

Fault reason: Because some MP3 files and MP3 players support different ranges, it is easy to skip and crash. There are several reasons: the adoption rate is wrong, generally 44.1KHZ, sometimes 48KHZ The file can not be used; compression rate, if the MP3 machine does not support the compression ratio of the MP3 (too high or too low); VBR does not support; there is an easy problem, some files are compressed by super solution, the default It is compressed into MP2 format, but it is displayed in MP3 format, which is not supported by most MP3 players.

Workaround: You can delete or re-convert yourself with the software and convert it into a format that meets the requirements of the machine. WMA files may also encounter copyright protection issues. At this time, other software must be used to release the copyright restrictions before they can be played. For the phenomenon of garbled characters, if the language setting is no problem, the ID3 tag is generally not set, you can adjust it yourself.

8. After booting up, press the button and the player does not respond.

Cause of failure: The machine keys are locked.

Workaround: Turn the HOLD button to release the button lock.

9. After connecting, you cannot transfer music files.

Workaround:

1Please confirm whether the USB communicator is connected to the computer and digital player, and the player is turned on.

2Please confirm that the USB driver is installed;

3Please confirm the available capacity of the storage and the size of the file to be downloaded;

4Please check if the battery is low. ;

5 Please check if the USB cable is good, or try a USB cable.

10. Your compressed MP3 file cannot be played in the player.

Fault reason: Because the compression format on the market is different, and the compression rate is different, the compression format of the compressed song is not compatible with the compression format of the player. The player only supports the standard compression format and does not support non-standard compression formats.

Workaround: When compressing songs, do not take the first layer or the second layer of compression.

11. Failure analysis and solution of the crash:

Fault reason: Several keys and other illegal operations (such as unplugging the USB plug when transferring files) are pressed at the same time.

Workaround:

1, press the reset button (RESET button) to shut down, press the power button to restart.

2. Format the machine. Pay special attention to formatting the memory directly in the MP4's setup menu.