title: Windows video player cannot play cropped video from ffmpeg
body: <p>I am trying to crop video with ffmpeg, I have encountered three problems.
  First, I used the following code to crop a 1080p video. </p>
  
  <pre><code>ffmpeg -i 1080vid.avi -vf "crop=1920:1080:0:0" -c:v libx264 -crf 1 -c:a copy output.mp4
  </code></pre>
  
  <p>However, in the compression rate argument, it only works if I set -crf to a positive value. If I set it to 0, then the output video cannot be played by my Windows 10 video player. However, since I am pursuing a lossless conversion, this is problematic. The output mp4 is smaller than 5% of the original size. </p>
  
  <p>The original goal was to cut a 1080*15360 video into 8 1080p videos. However, using the following code, I get unplayable output after playing with all the settings. </p>
  
  <pre><code>ffmpeg -i sample.avi -vf "crop=1920:1080:0:0" -c:v libx264 -crf 1 -c:a copy output.mp4
  </code></pre>
  
  <p>The input sample.avi is a lossless avi with bitrate larger than 1GB/s, and the output is a 70kb unplayable file. When opened, a pop up window displays: </p>
  
  <pre><code>Choose something else to play. This item is in a format we don't support.
  0xc00d36b4
  </code></pre>
  
  <p>The following is the command line output.</p>
  
  <pre><code>ffmpeg version N-94396-g47b6ca0b02 Copyright (c) 2000-2019 the FFmpeg developers
    built with gcc 9.1.1 (GCC) 20190716
    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-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
    libavutil      56. 32.100 / 56. 32.100
    libavcodec     58. 55.100 / 58. 55.100
    libavformat    58. 30.100 / 58. 30.100
    libavdevice    58.  9.100 / 58.  9.100
    libavfilter     7. 58.100 /  7. 58.100
    libswscale      5.  6.100 /  5.  6.100
    libswresample   3.  6.100 /  3.  6.100
    libpostproc    55.  6.100 / 55.  6.100
  Input #0, avi, from 'sample.avi':
    Metadata:
      date            : 2019-07-26T07:09:04.185811
    Duration: 00:00:03.00, start: 0.000000, bitrate: 11932176 kb/s
      Stream #0:0: Video: rawvideo, bgr24, 15360x1080, 12066071 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
  File 'output.mp4' already exists. Overwrite ? [y/N] y
  Stream mapping:
    Stream #0:0 -&gt; #0:0 (rawvideo (native) -&gt; h264 (libx264))
  Press [q] to stop, [?] for help
  [libx264 @ 000002a4a910b900] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  [libx264 @ 000002a4a910b900] profile High 4:4:4 Predictive, level 6.0, 4:4:4, 8-bit
  [libx264 @ 000002a4a910b900] 264 - core 157 r2970 5493be8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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=4 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=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  Output #0, mp4, to 'output.mp4':
    Metadata:
      date            : 2019-07-26T07:09:04.185811
      encoder         : Lavf58.30.100
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 15360x1080, q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc
      Metadata:
        encoder         : Lavc58.55.100 libx264
      Side data:
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  frame=   90 fps=8.0 q=-1.0 Lsize=      65kB time=00:00:02.90 bitrate= 183.7kbits/s speed=0.258x
  video:63kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.042484%
  [libx264 @ 000002a4a910b900] frame I:1     Avg QP: 0.35  size: 22252
  [libx264 @ 000002a4a910b900] frame P:23    Avg QP: 0.09  size:   476
  [libx264 @ 000002a4a910b900] frame B:66    Avg QP: 0.00  size:   467
  [libx264 @ 000002a4a910b900] consecutive B-frames:  2.2%  0.0%  0.0% 97.8%
  [libx264 @ 000002a4a910b900] mb I  I16..4: 92.1%  6.5%  1.5%
  [libx264 @ 000002a4a910b900] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.0%  0.0%  0.0%  0.0%  0.0%    skip:100.0%
  [libx264 @ 000002a4a910b900] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.0%  0.0%  0.0%  direct: 0.0%  skip:100.0%
  [libx264 @ 000002a4a910b900] 8x8 transform intra:6.5% inter:0.0%
  [libx264 @ 000002a4a910b900] coded y,u,v intra: 0.4% 0.0% 0.0% inter: 0.0% 0.0% 0.0%
  [libx264 @ 000002a4a910b900] i16 v,h,dc,p: 96%  2%  2%  0%
  [libx264 @ 000002a4a910b900] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 93%  1%  7%  0%  0%  0%  0%  0%  0%
  [libx264 @ 000002a4a910b900] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 42% 25% 31%  0%  0%  0%  0%  0%  0%
  [libx264 @ 000002a4a910b900] Weighted P-Frames: Y:0.0% UV:0.0%
  [libx264 @ 000002a4a910b900] kb/s:170.49
  </code></pre>