在使用 ffmpeg 处理视频时，遇到一个问题，无法解决，求助

原视频：a.mp4 帧率：60 时长：17''

操作步骤：

使用命令 ffmpeg -i a.mp4 -qscale:v 1 -qmin 1 -qmax 1 -vsync 0 /tmp_frames/frame%08d.jpg 将视频的所有帧都提取出来，得到： 1044 张图片；
然后用 python 脚本优化处理这1044张图片，并存在 out_frames 中，得到 1044 张图片；
使用命令：ffmpeg -i out_frames/out_frame%08d.jpg -i a.mp4 -map 0:v:0 -map 1:a:0 -c:a copy -c:v libx264 -r 60 -pix_fmt yuv420p output_a.mp4

期望

得到：新视频：output_a.mp4 帧率：60 时长：17''

实际

得到: 新视频：output_a.mp4 帧率：60 时长：44''

问题

为什么指定了帧率，时长不能跟原视频一样（视频时长不对，但音频时长是对的），要如何处理才能与期望值相符；搜索也问了 gpt ，它要求加上 -t 参数，但 -t 参数只是截取前 17''，会导致视频不完整

日志

ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with Apple clang version 15.0.0 (clang-1500.0.40.1)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.0_2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --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-videotoolbox --enable-audiotoolbox --enable-neon
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
Input #0, image2, from '/Users/XXXX/Documents/out_frames/out_frame%08d.jpg':
  Duration: 00:00:41.76, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 1000x1770 [SAR 1:1 DAR 100:177], 25 fps, 25 tbr, 25 tbn
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'test.MP4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    comment         : vid:v0300fg10000cn42qhrc77u6heiifl6g
    encoder         : Lavf58.76.100
  Duration: 00:00:17.44, start: 0.000000, bitrate: 1571 kb/s
  Stream #1:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 720x1280 [SAR 1:1 DAR 9:16], 1431 kb/s, 60 fps, 60 tbr, 15360 tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #1:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  Stream #1:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[image2 @ 0x144104080] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
[swscaler @ 0x130658000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x148320000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x1381c8000] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x148320000] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 0x144011220] using SAR=1/1
[libx264 @ 0x144011220] using cpu capabilities: ARMv8 NEON
[libx264 @ 0x144011220] profile High, level 4.2, 4:2:0, 8-bit
[libx264 @ 0x144011220] 264 - core 164 r3108 31e19f9 - H.264/MPEG-4 AVC codec - Copyleft 2003-2023 - 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=12 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, mp4, to 'output_test.MP4':
  Metadata:
    encoder         : Lavf60.3.100
  Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt470bg/unknown/unknown, progressive), 1000x1770 [SAR 1:1 DAR 100:177], q=2-31, 60 fps, 15360 tbn
    Metadata:
      encoder         : Lavc60.3.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
[vost#0:0/libx264 @ 0x144010f50] More than 1000 frames duplicated
frame= 2505 fps=130 q=-1.0 Lsize=   90004kB time=00:00:41.70 bitrate=17681.4kbits/s dup=1461 drop=0 speed=2.17x    
video:89684kB audio:273kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.052407%
[libx264 @ 0x144011220] frame I:11    Avg QP:27.17  size:669305
[libx264 @ 0x144011220] frame P:631   Avg QP:30.57  size:107758
[libx264 @ 0x144011220] frame B:1863  Avg QP:36.59  size:  8845
[libx264 @ 0x144011220] consecutive B-frames:  0.8%  0.1%  0.1% 99.0%
[libx264 @ 0x144011220] mb I  I16..4:  7.3% 20.1% 72.5%
[libx264 @ 0x144011220] mb P  I16..4:  0.2%  0.2%  3.9%  P16..4: 20.9% 12.1% 17.0%  0.0%  0.0%    skip:45.7%
[libx264 @ 0x144011220] mb B  I16..4:  0.0%  0.0%  0.1%  B16..8: 11.7%  2.5%  2.3%  direct: 0.7%  skip:82.6%  L0:55.3% L1:41.7% BI: 3.0%
[libx264 @ 0x144011220] 8x8 transform intra:10.0% inter:9.4%
[libx264 @ 0x144011220] coded y,uvDC,uvAC intra: 91.4% 0.0% 0.0% inter: 7.6% 0.0% 0.0%
[libx264 @ 0x144011220] i16 v,h,dc,p: 72%  3% 21%  4%
[libx264 @ 0x144011220] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24%  4% 54%  3%  2%  4%  1%  6%  1%
[libx264 @ 0x144011220] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 37%  9% 23%  5%  4%  7%  3%  8%  5%
[libx264 @ 0x144011220] i8c dc,h,v,p: 100%  0%  0%  0%
[libx264 @ 0x144011220] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x144011220] ref P L0: 57.5%  7.5% 20.6% 14.5%
[libx264 @ 0x144011220] ref B L0: 81.5% 11.8%  6.7%
[libx264 @ 0x144011220] ref B L1: 98.3%  1.7%
[libx264 @ 0x144011220] kb/s:17597.24