无法写入具有未知时间戳的数据包 av_interleaved_write_frame()：无效参数

问题描述

我正在尝试将带有此输出的 .ts 文件转换为 mkv：

ffmpeg version 4.3.1 copyright (c) 2000-2020 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.27)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1_4 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolBox --disable-libjack --disable-indev=jack
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
[mp3float @ 0x7fbd6282b200] Header missing
[mpegts @ 0x7fbd62809000] PES packet size mismatch
[mpegts @ 0x7fbd62809000] Packet corrupt (stream = 2,dts = 7125804577).
[mpegts @ 0x7fbd62809000] PES packet size mismatch
[mpegts @ 0x7fbd62809000] Packet corrupt (stream = 2,dts = 7125804577).
[mpegts @ 0x7fbd62809000] PES packet size mismatch
[mpegts @ 0x7fbd62809000] Packet corrupt (stream = 1,dts = 7125790091).
Input #0,mpegts,from '/Users/"User"/Downloads/input.ts':
  Duration: 02:11:32.82,start: 71283.837456,bitrate: 17149 kb/s
  Program 1 
    Stream #0:0[0x1004]: Video: h264 (High) ([27][0][0][0] / 0x001B),yuvj420p(pc,bt709,progressive),1280x720 [SAR 1:1 DAR 16:9],50 fps,2.08 tbr,90k tbn,100 tbc
    Stream #0:1[0x1104](swe): Audio: mp2 ([3][0][0][0] / 0x0003),48000 Hz,stereo,fltp,256 kb/s
    Stream #0:2[0x704](swe): Audio: ac3 ([129][0][0][0] / 0x0081),5.1(side),640 kb/s

为此，我正在使用此命令：

ffmpeg -i input.ts -c copy output.mkv

但转换失败并出现此错误：

Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:2 -> #0:1 (copy)
Press [q] to stop,[?] for help
[matroska @ 0x7fb8c1808200] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
[matroska @ 0x7fb8c1808200] Can't write packet with unkNown timestamp
av_interleaved_write_frame(): Invalid argument
[matroska @ 0x7fb8c1808200] Can't write packet with unkNown timestamp
Error writing trailer of output.mkv: Invalid argument
frame=   27 fps=0.0 q=-1.0 Lsize=      74kB time=00:00:00.85 bitrate= 705.5kbits/s speed=  99x    
video:1092kB audio:35kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unkNown
Conversion Failed!

我应该怎么做才能解决这个问题？我已经尝试在开始时添加 -fflags +genpts 但它还是失败了。

编辑：我确实通过使用 MKVToolNix 解决了这个问题。

解决方法

尝试使用 -ss 标志运行。

ffmpeg -ss 0:01 -i input.ts -c copy output.mkv