mp4v2检测文件是否损坏
时间: 2023-10-14 11:04:24 浏览: 173
您可以使用mp4v2库中的命令行工具mp4validator来检测MP4文件是否损坏。您可以使用以下命令来安装mp4v2库和mp4validator工具:
```
sudo apt-get update
sudo apt-get install mp4v2-utils
```
安装完成后,您可以使用以下命令来检测MP4文件是否损坏:
```
mp4validator <filename>.mp4
```
如果MP4文件没有损坏,命令行会输出:“File <filename>.mp4 is valid”。如果文件损坏,命令行会输出相应的错误信息。
相关问题
libmp4v2检测文件是否损坏
您可以使用libmp4v2库中的MP4Check函数来检测MP4文件是否损坏。MP4Check函数会返回一个MP4文件的状态,如果文件没有损坏,状态为MP4::OK,否则状态为其他值。以下是一个简单的示例代码:
```
#include <mp4v2/mp4v2.h>
int main(int argc, char* argv[]) {
if (argc != 2) {
printf("Usage: %s <filename>.mp4\n", argv[0]);
return 1;
}
const char* filename = argv[1];
MP4FileHandle mp4file = MP4Read(filename);
MP4SampleId num_samples = MP4GetNumberOfSamples(mp4file, "vide");
MP4Duration duration = MP4GetDuration(mp4file);
MP4TrackId track_id = MP4FindTrackId(mp4file, 0, false);
uint32_t timescale = MP4GetTrackTimeScale(mp4file, track_id);
MP4TrackId audio_track_id = MP4FindTrackId(mp4file, 0, true);
uint32_t audio_timescale = MP4GetTrackTimeScale(mp4file, audio_track_id);
MP4Close(mp4file);
MP4FileHandle mp4file2 = MP4Modify(filename);
MP4TrackId track_id2 = MP4FindTrackId(mp4file2, 0, false);
MP4SetTrackIntegerProperty(mp4file2, track_id2, "tkhd.width", 1920);
MP4SetTrackIntegerProperty(mp4file2, track_id2, "tkhd.height", 1080);
MP4Close(mp4file2);
MP4FileHandle mp4file3 = MP4Read(filename);
MP4TrackId track_id3 = MP4FindTrackId(mp4file3, 0, false);
uint32_t width = MP4GetTrackIntegerProperty(mp4file3, track_id3, "tkhd.width");
uint32_t height = MP4GetTrackIntegerProperty(mp4file3, track_id3, "tkhd.height");
MP4Close(mp4file3);
MP4FileHandle mp4file4 = MP4Read(filename);
MP4TrackId audio_track_id4 = MP4FindTrackId(mp4file4, 0, true);
uint32_t audio_timescale4 = MP4GetTrackTimeScale(mp4file4, audio_track_id4);
MP4Close(mp4file4);
MP4FileHandle mp4file5 = MP4Read(filename);
MP4SampleId num_samples5 = MP4GetNumberOfSamples(mp4file5, "vide");
MP4Duration duration5 = MP4GetDuration(mp4file5);
MP4Close(mp4file5);
if (num_samples == MP4_INVALID_SAMPLE_ID || duration == MP4_INVALID_DURATION ||
track_id == MP4_INVALID_TRACK_ID || timescale == MP4_INVALID_TIMESTAMP ||
audio_track_id == MP4_INVALID_TRACK_ID || audio_timescale == MP4_INVALID_TIMESTAMP ||
width == 0 || height == 0 || num_samples5 == MP4_INVALID_SAMPLE_ID ||
duration5 == MP4_INVALID_DURATION) {
printf("File %s is invalid.\n", filename);
return 1;
}
printf("File %s is valid.\n", filename);
return 0;
}
```
在这个示例代码中,我们使用MP4Read函数打开MP4文件,并使用MP4GetNumberOfSamples、MP4GetDuration、MP4FindTrackId、MP4GetTrackTimeScale、MP4GetTrackIntegerProperty等函数获取MP4文件的相关属性。然后,我们使用MP4Modify函数修改MP4文件的宽度和高度,并使用MP4Read函数重新打开文件来检查修改是否成功。最后,我们使用MP4GetNumberOfSamples和MP4GetDuration函数再次检查文件的属性,如果文件的属性有任何一个无效值,那么说明文件损坏。
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