The easiest way to fix MP4 header issues is by using a dedicated tool like Wondershare Video Repair. Part 3: An Ultimate Way to Fix MP4 Header Easily During playback, your video might stop playing in between as well. After loading on a media player, you might get a logical error about a missing or corrupt segment.Īpart from that, your file can have a missing piece, blurry video, frozen video, blank segment, lack of audio-video sync, missing sound/video, etc. Even if a single chunk is corrupted, and the segment is important, then its corruption can make the video harder to play. What happens when an MP4 header gets corrupt?Ī corrupted MP4 header can affect the video in several ways. A bad sector, missing partition, or even a malware attack on the storage can cause this problem.There can be issues regarding opening the file or editing it.A clash between the system processes or applications.An infected device (like camera or camcorder) can also cause this issue.The firmware or anti-virus application on your computer can also corrupt a header.Sometimes, a human error or the accidental change in the hexadecimal code of the header can also make it corrupt.An unexpected shutdown of the system while the MP4 file was in use.The mishandling of the MP4 file by a media player, video editor, or any other tool.What can cause an MP4 header to get corrupt? Ideally, any forceful change in the header data or its deletion can make the video corrupt. If the header is corrupted, then you might not be able to play the video in the right place. As you know, an MP4 header can contain crucial details about the chunk type, size, and so on. I'm sure that after going through the above-listed example, you can get a rough idea about the MP4 header. Part 2: What is MP4 Header Corruption and How to detect it?
It presents the size of the chunk, followed by its type and subtype. On the left, you can see that the hexadecimal code is defined into different segments with the offset. The ASCII code for ftype (file type) is defined as MP4. To further understand the MP4 header information, you can consider this example. For instance, it can be a container with user track (udta), with one track (trak), with video details (mvhd), and so on. The second level of the type header can further have additional details.
moov: movie information with header and tracks.pdin: loading information (for progressive video).The first level of the MP4 header that would define the "type" of the chunk, can be of the following kind: The first section defines the size of the chunk while the second section provides details about it. Now, the header section is further divided into 2 chunks (of 4 bytes each). What is an MP4 video header?Īn MP4 file is ideally divided into different chunks (parts), and each chunk has an 8-byte header that provides certain details about it. Therefore, you can easily play MP4 files on QuickTime, Windows Media Player, VLC Media Player, and so on. Since it is an open format, it is supported by almost every major media player. The video format was originated from QuickTime and gradually become universal. Apart from that, it is also used in broadcasting, data compression, and video storage as well. The format is extensively used in streaming services as well since it supports subtitles with video playback. Part 1: An Overview of MP4 Video Files and Video HeaderĪs stated above, MP4 is a common video and audio format that is used to store, transfer, and compress video files. General Tips and Tricks for MP4 File Repair What's MP4 Header Corruption and How to Detect It? An Overview of MP4 Video Files and Video Header
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