使用 Process 在 C# 控制台应用程序中运行 ffmpeg -i，对于某些文件，该进程会卡住并永远运行
var oInfo = new ProcessStartInfo("ffmpeg.exe", "-i 176d2819-f1da-44eb-b33b-94eb1448194b.mov");
oInfo.UseShellExecute = false;
oInfo.CreateNoWindow = true;
oInfo.RedirectStandardOutput = true;
oInfo.RedirectStandardError = true;
string output = string.Empty;
StreamReader srOutput = null;
//run the process
Process proc = Process.Start(oInfo);
proc.WaitForExit();
srOutput = proc.StandardError;
output = srOutput.ReadToEnd();
proc.Close();
从命令行运行
ffmpeg.exe -i 176d2819-f1da-44eb-b33b-94eb1448194b.mov，收到以下输出中包含的错误
找不到流 1 的编解码器参数（音频：无（apac / 0x63617061）、48000 Hz、4 通道、382 kb/s）：未知编解码器 考虑增加“analyzeduration”(0) 和“probesize”(5000000) 选项的值 [aist#0:1/none @ 0000029b0e1b0040] 猜测的频道布局：4.0 输入 #0, mov,mp4,m4a,3gp,3g2,mj2, 来自 '176d2819-f1da-44eb-b33b-94eb1448194b.mov'
ffmpeg version N-117538-g9ce63e65d6-20241015 Copyright (c) 2000-2024 the FFmpeg developers
built with gcc 14.2.0 (crosstool-NG 1.26.0.120_4d36f27)
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-libxml2 --enable-lzma --enable-fontconfig --enable-libharfbuzz --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth --enable-chromaprint --enable-libdav1d --enable-libdavs2 --enable-libdvdread --enable-libdvdnav --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist --enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp --enable-libzmq --enable-lv2 --enable-libvpl --enable-openal --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --enable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable-libplacebo --enable-libvvenc --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-libs=-lgomp --extra-ldflags=-pthread --extra-ldexeflags= --cc=x86_64-w64-mingw32-gcc --cxx=x86_64-w64-mingw32-g++ --ar=x86_64-w64-mingw32-gcc-ar --ranlib=x86_64-w64-mingw32-gcc-ranlib --nm=x86_64-w64-mingw32-gcc-nm --extra-version=20241015
libavutil 59. 43.100 / 59. 43.100
libavcodec 61. 22.100 / 61. 22.100
libavformat 61. 9.100 / 61. 9.100
libavdevice 61. 4.100 / 61. 4.100
libavfilter 10. 6.100 / 10. 6.100
libswscale 8. 6.100 / 8. 6.100
libswresample 5. 4.100 / 5. 4.100
libpostproc 58. 4.100 / 58. 4.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b447c84e40] Could not find codec parameters for stream 1 (Audio: none (apac / 0x63617061), 48000 Hz, 4 channels, 382 kb/s): unknown codec
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
[aist#0:1/none @ 000001b44a6bf880] Guessed Channel Layout: 4.0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '176d2819-f1da-44eb-b33b-94eb1448194b.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2024-10-14T07:34:17.000000Z
com.apple.quicktime.full-frame-rate-playback-intent: 0
com.apple.quicktime.make: Apple
com.apple.quicktime.model: iPhone 16 Pro Max
com.apple.quicktime.software: 18.0.1
com.apple.quicktime.creationdate: 2024-10-14T16:18:36+1100
com.apple.photos.originating.signature: AQMNJRMQrKK7im+Kjhixx6TqQyYm
Duration: 00:00:32.60, start: 0.000000, bitrate: 15064 kb/s
Stream #0:0[0x1](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 130 kb/s (default)
Metadata:
creation_time : 2024-10-14T07:34:17.000000Z
handler_name : Core Media Audio
vendor_id : [0][0][0][0]
Stream #0:1[0x2](und): Audio: none (apac / 0x63617061), 48000 Hz, 4.0, 382 kb/s
Metadata:
creation_time : 2024-10-14T07:34:17.000000Z
handler_name : Core Media Audio
vendor_id : [0][0][0][0]
Stream #0:2[0x3](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080, 14464 kb/s, 30 fps, 30 tbr, 600 tbn (default)
Metadata:
creation_time : 2024-10-14T07:34:17.000000Z
handler_name : Core Media Video
vendor_id : [0][0][0][0]
encoder : H.264
Stream #0:3[0x4](und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : 2024-10-14T07:34:17.000000Z
handler_name : Core Media Metadata
Stream #0:4[0x5](und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : 2024-10-14T07:34:17.000000Z
handler_name : Core Media Metadata
Stream #0:5[0x6](und): Data: none (mebx / 0x7862656D), 21 kb/s (default)
Metadata:
creation_time : 2024-10-14T07:34:17.000000Z
handler_name : Core Media Metadata
Stream #0:6[0x7](und): Data: none (mebx / 0x7862656D), 48 kb/s (default)
Metadata:
creation_time : 2024-10-14T07:34:17.000000Z
handler_name : Core Media Metadata
Stream #0:7[0x8](und): Data: none (mebx / 0x7862656D), 2 kb/s (default)
Metadata:
creation_time : 2024-10-14T07:34:17.000000Z
handler_name : Core Media Metadata
Stream #0:8[0x9](und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : 2024-10-14T07:34:17.000000Z
handler_name : Core Media Metadata
此错误不会发生在所有文件上，而只会发生在少数文件上。
我通过在 WaitForExit 属性中输入时间来解决这个问题
Process proc = Process.Start(oInfo);
proc.WaitForExit(20000);
srOutput = proc.StandardError;
output = srOutput.ReadToEnd();
proc.Close();
它在 20 秒后存在，这足以获取媒体信息，即使在有错误的文件上，它仍然具有媒体信息