我从 DVD 中截取了一些附加内容，这些内容基本上是图库，然后将其转换为 MKV。它们的播放速度太快了，所以我使用 ffmpeg 减慢了速度，如下所示：
ffmpeg -i input.mkv -filter:v "setpts=64*PTS" output.mkv
生成的视频在 5KPlayer 中播放效果很好但很慢，但在 VLC 中只显示几帧，似乎冻结了，然后文件关闭。
我在一篇较旧的问题有人警告说这种情况会发生：
虽然播放速度似乎因此而改变，但视频时长似乎显示不正确；例如，3 分钟的视频加速 3 倍后仍会显示为 3 分钟。如果您在视频播放器（例如 VLC）中播放，视频将只占用第一分钟，然后在剩余的 2 分钟内冻结在一帧上。– jrh 2018 年 11 月 19 日 21:55
那么，我该如何修复播放问题，以便视频可以在任何播放器（包括 VLC）中正确播放？
ffmpeg的完整日志：
ffmpeg -i ~/Movies/Mac\ Video\ Library/JURASSIC_PARK_III_T51.mkv -an -filter:v "setpts=64*(PTS-STARTPTS)" ~/Movies/Mac\ Video\ Library/JURASSIC_PARK_III_T51-1.mkv
ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
built with Apple clang version 12.0.0 (clang-1200.0.32.29)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.4_2 --enable-shared --enable-pthreads --enable-version3 --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-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-avresample --enable-videotoolbox
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Input #0, matroska,webm, from '/Users/sphillips/Movies/Mac Video Library/JURASSIC_PARK_III_T51.mkv':
Metadata:
CREATION_TIME : 2021-10-27T00:54:46Z
ENCODER : Lavf57.7.2
Duration: 00:00:01.47, start: 0.000000, bitrate: 2205 kb/s
Stream #0:0: Video: h264 (High), yuv420p(tv, smpte170m/smpte170m/bt709, progressive), 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 1k tbn, 180k tbc (default)
Stream #0:1(eng): Subtitle: dvd_subtitle, 720x480
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x7fbe32040200] using SAR=8/9
[libx264 @ 0x7fbe32040200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fbe32040200] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x7fbe32040200] 264 - core 163 r3060 5db6aa6 - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=15 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, matroska, to '/Users/sphillips/Movies/Mac Video Library/JURASSIC_PARK_III_T51-1.mkv':
Metadata:
encoder : Lavf58.76.100
Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p(tv, smpte170m/smpte170m/bt709, progressive), 720x480 [SAR 8:9 DAR 4:3], q=2-31, 29.97 fps, 1k tbn (default)
Metadata:
encoder : Lavc58.134.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 1 fps=0.0 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= frame= 44 fps=0.0 q=-1.0 Lsize= 788kB time=00:01:27.55 bitrate= 73.7kbits/s speed= 368x
video:787kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.152554%
[libx264 @ 0x7fbe32040200] frame I:1 Avg QP:12.94 size: 60994
[libx264 @ 0x7fbe32040200] frame P:32 Avg QP:12.48 size: 18069
[libx264 @ 0x7fbe32040200] frame B:11 Avg QP:16.84 size: 15067
[libx264 @ 0x7fbe32040200] consecutive B-frames: 56.8% 27.3% 6.8% 9.1%
[libx264 @ 0x7fbe32040200] mb I I16..4: 1.9% 71.0% 27.1%
[libx264 @ 0x7fbe32040200] mb P I16..4: 6.8% 16.5% 11.8% P16..4: 15.7% 1.9% 2.1% 0.0% 0.0% skip:45.2%
[libx264 @ 0x7fbe32040200] mb B I16..4: 7.2% 9.1% 10.7% B16..8: 6.0% 2.4% 1.1% direct: 1.3% skip:62.2% L0:61.5% L1:33.4% BI: 5.0%
[libx264 @ 0x7fbe32040200] 8x8 transform intra:46.0% inter:42.9%
[libx264 @ 0x7fbe32040200] coded y,uvDC,uvAC intra: 72.2% 75.2% 58.3% inter: 12.6% 11.0% 6.6%
[libx264 @ 0x7fbe32040200] i16 v,h,dc,p: 71% 23% 2% 4%
[libx264 @ 0x7fbe32040200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 20% 13% 7% 8% 8% 8% 9% 11%
[libx264 @ 0x7fbe32040200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 24% 10% 6% 7% 6% 7% 6% 6%
[libx264 @ 0x7fbe32040200] i8c dc,h,v,p: 45% 25% 20% 9%
[libx264 @ 0x7fbe32040200] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7fbe32040200] ref P L0: 61.8% 2.5% 25.0% 10.8%
[libx264 @ 0x7fbe32040200] ref B L0: 57.2% 37.9% 4.9%
[libx264 @ 0x7fbe32040200] ref B L1: 94.8% 5.2%
[libx264 @ 0x7fbe32040200] kb/s:68.51