多音轨录制MP4视频文件
广播专业级别的摄像机一般都是支持多音轨录制,提供更清晰的录音效果,索尼EX280摄像机就是很常见的机型。如遇到此类MP4视频文件损坏,断电死机或者数据丢失恢复后,可能会遇到声音修复不正常的情况,往往是只修复出一个音轨,其它的声音丢失,特别是有内录的,虽然视频修复后有声音有画面,但是声音效果不清晰。问题来了,内录音轨还能修复回来吗?
视频修复技术还原内录声音
通过人工对样本视频的数据结构分析,再分析损坏的视频文件,不难发现所有音轨的原始数据还是没有丢失,但是如果想还原成为平常听到的声音,通过多次修复经验得到的答案是可以做到的,但必须通过人工参与编程修复,因为多音轨这一特殊性目前的自动修复程序还未能正确处理多音轨数据。以下为多音轨的MP4视频文件信息,供参考。
Format | MPEG-4 |
Commercial name | XDCAM EX 35 |
Format profile | Base Media / Version 2 |
Codec ID | mp42 (mp42) |
File size | 321 MiB |
Video | |
ID | 1 |
Format | MPEG Video |
Commercial name | XDCAM EX 35 |
Format version | Version 2 |
Format profile | Main@High |
Format settings | CustomMatrix / BVOP |
Format settings, BVOP | Yes |
Format settings, Matrix | Custom |
Format settings, GOP | M=3, N=12 |
Format settings, picture structure | Frame |
Codec ID | mp4v-61 |
Audio #1 | |
ID | 2 |
Format | PCM |
Format settings | Big / Signed |
Codec ID | twos |
Duration | 1 min 10 s |
Bit rate mode | Constant |
Bit rate | 768 kb/s |
Channel(s) | 1 channel |
Audio #2 | |
ID | 3 |
Format | PCM |
Format settings | Big / Signed |
Codec ID | twos |
Duration | 1 min 10 s |
Bit rate mode | Constant |
Bit rate | 768 kb/s |
Channel(s) | 1 channel |
Audio #3 | |
ID | 4 |
Format | PCM |
Format settings | Big / Signed |
Codec ID | twos |
Duration | 1 min 10 s |
Bit rate mode | Constant |
Bit rate | 768 kb/s |
Channel(s) | 1 channel |
Audio #4 | |
ID | 5 |
Format | PCM |
Format settings | Big / Signed |
Codec ID | twos |
Duration | 1 min 10 s |
Bit rate mode | Constant |
Bit rate | 768 kb/s |
Channel(s) | 1 channel |