去github上下载untrunc 工具就能修复
https://github.com/anthwlock/untrunc/releases
如果访问不了
本机的
hosts文件设置
140.82.112.3 github.com
199.232.69.194 github.global.ssl.fastly.net
就能访问了
实在不行，从这里下载，传上去了
https://download.csdn.net/download/AnalogElectronic/90836449
参考一个相似的录屏文件
truncated file 为受损文件
修复完成后，它会在受损文件所在目录生成一个修复后的文件 20250512_191204.mp4_fixed.mp4， 就能打开了。
尝试过别的方法都不信
E:\>ffmpeg -err_detect ignore_err -i 20250512_191204.mp4 -c copy 修复后.mp4
ffmpeg version 2025-05-05-git-f4e72eb5a3-essentials_build-www.gyan.dev Copyright (c) 2000-2025 the FFmpeg developers
built with gcc 15.1.0 (Rev1, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-li
bxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-
libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-libfreetype --enable-li
bfribidi --enable-libharfbuzz --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-dxva2 --enable-d3d11va --ena
ble-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libm
p3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberban
d
libavutil 60. 2.100 / 60. 2.100
libavcodec 62. 3.101 / 62. 3.101
libavformat 62. 0.102 / 62. 0.102
libavdevice 62. 0.100 / 62. 0.100
libavfilter 11. 0.100 / 11. 0.100
libswscale 9. 0.100 / 9. 0.100
libswresample 6. 0.100 / 6. 0.100
libpostproc 59. 1.100 / 59. 1.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000016d43832b80] moov atom not found
[in#0 @ 0000016d43836b00] Error opening input: Invalid data found when processing input
Error opening input file 20250512_191204.mp4.
Error opening input files: Invalid data found when processing input
会报错
moov一般在录制结束才会写入，所以异常退出会导致moov缺失。这个是MP4的缺陷， MKV格式异常退出不会损坏。