failed about my own test video

[isaiah-li]

Hi,thank you for your good work! when i test the video which download from YouTube, it get good results, but when i upload my own video which captured by my phone camera, it's failed. I found the ret_val is always False when i test my own video. ret_val, img0 = self.cap.read() line 212, datasets.py

i have checked the authority and the format between the videos, and i did not find the solution.

ffmpeg -i DownloadfromYouTube.mp4 
ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7.2.0 (crosstool-NG fa8859cb)
  configuration: --prefix=/mnt/anaconda3/envs/torch_1 --cc=/opt/conda/conda-bld/ffmpeg_1531088893642/_build_env/bin/x86_64-conda_cos6-linux-gnu-cc --disable-doc --enable-shared --enable-static --enable-zlib --enable-pic --enable-gpl --enable-version3 --disable-nonfree --enable-hardcoded-tables --enable-avresample --enable-libfreetype --disable-openssl --disable-gnutls --enable-libvpx --enable-pthreads --enable-libopus --enable-postproc --disable-libx264
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'dancelunba.mp4':
  Metadata:
    major_brand     : dash
    minor_version   : 0
    compatible_brands: iso6avc1mp41
    creation_time   : 2019-01-23T00:28:22.000000Z
  Duration: 00:01:14.30, start: 0.000000, bitrate: 968 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt709/bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 49 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      creation_time   : 2019-01-23T00:28:22.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 01/22/2019.
At least one output file must be specified

ffmpeg -i CapturedbyCamera.mp4 
ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7.2.0 (crosstool-NG fa8859cb)
  configuration: --prefix=/mnt/anaconda3/envs/torch_1 --cc=/opt/conda/conda-bld/ffmpeg_1531088893642/_build_env/bin/x86_64-conda_cos6-linux-gnu-cc --disable-doc --enable-shared --enable-static --enable-zlib --enable-pic --enable-gpl --enable-version3 --disable-nonfree --enable-hardcoded-tables --enable-avresample --enable-libfreetype --disable-openssl --disable-gnutls --enable-libvpx --enable-pthreads --enable-libopus --enable-postproc --disable-libx264
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'saisai4_novoice.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.12.100
    location-eng    : +31.8762+118.7682/
    location        : +31.8762+118.7682/
  Duration: 00:00:11.94, start: 0.000000, bitrate: 9303 kb/s
    Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 9301 kb/s, SAR 1:1 DAR 16:9, 29.83 fps, 29.83 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      rotate          : 180
      handler_name    : VideoHandler
    Side data:
      displaymatrix: rotation of -180.00 degrees
At least one output file must be specified

[wmcnally]

Please ensure the path to the video is correct.

[jason0860907]

I found the ret_val is always False when I test my own video, too. I solved the problem by setting --start default=0 and --end default=-1