我有一些带有 7.1 truehd 的 m2ts 文件。当我尝试连接它们并使用 -c copy 或使用 -acodec copy 并将它们放入 m2ts 输出时，我没有声音。我也可以简单地尝试一个文件，不与任何东西合并，复制音频和视频并输出到另一个 m2ts 文件，我仍然没有音频。ffpmeg 看到音频文件并表现得像正在复制它，但它不在最终产品中。ffmpeg 不能输出 truehd 吗？
C:\Users\Michael\Videos\Recode>ffmpeg -i 01.m2ts -c copy out.m2ts
ffmpeg version git-2020-03-12-675bb1f Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9.2.1 (GCC) 20200122
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
libavutil 56. 42.100 / 56. 42.100
libavcodec 58. 75.100 / 58. 75.100
libavformat 58. 41.100 / 58. 41.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 77.100 / 7. 77.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
[mpegts @ 000001ead9788a80] start time for stream 3 is not set in estimate_timings_from_pts
[mpegts @ 000001ead9788a80] start time for stream 4 is not set in estimate_timings_from_pts
[mpegts @ 000001ead9788a80] Could not find codec parameters for stream 3 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 000001ead9788a80] Could not find codec parameters for stream 4 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpegts, from '01.m2ts':
Duration: 00:06:30.27, start: 11.650667, bitrate: 35679 kb/s
Program 1
Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
Stream #0:1[0x1100]: Audio: truehd (AC-3 / 0x332D4341), 48000 Hz, 7.1, s32 (24 bit)
Stream #0:2[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 448 kb/s
Stream #0:3[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:4[0x1201]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Output #0, mpegts, to 'out.m2ts':
Metadata:
encoder : Lavf58.41.100
Stream #0:0: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 23.98 tbr, 90k tbn, 90k tbc
Stream #0:1: Audio: truehd (AC-3 / 0x332D4341), 48000 Hz, 7.1, s32 (24 bit)
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 9357 fps=1026 q=-1.0 Lsize= 1619640kB time=00:06:30.26 bitrate=33997.7kbits/s speed=42.8x
video:1428645kB audio:117099kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 4.780587%
C:\Users\Michael\Videos\Recode>