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I am dealing with a video that as a codec tag of none, but the actual codec is GHEC. I am aware this is a proprietary codec from GeoVision. The video will not play unless I use ffplay with the -vcodec hevc argument. Since GHEC codec will play via hevc codec, is there any way I can force the codec to be hevc on this video so I can watch it in other media players like VLC?

Here are the streams from ffprobe:

    Stream #0:0: Video: none (GHEC / 0x43454847), none, 1920x1080, 451 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
    Stream #0:1: Subtitle: none, 3 kb/s
    Stream #0:2: Subtitle: none
  • Remux via ffmpeg with the decoder specified. – Gyan Jun 18 at 5:41
  • @Gyan anything I try keeps giving me this error: Output file #0 does not contain any stream. I have tried ffmpeg -i in.avi -vcodec:hevc out.avi, ffmpeg -i in.avi -vcodec hevc out.avi, and ffmpeg -i -c:v codec hevc out.avi. Are my commands correct? – TheMiddleMan Jun 18 at 16:10
  • Got it, looks like it -c:v hevc must come before the -i argument. – TheMiddleMan Jun 18 at 16:33
  • @Gyan If you want to answer my question I can accept the answer – TheMiddleMan Jun 18 at 16:33
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If you know the compatible codec in ffmpeg, you can remux the file to generate a standard file, e.g.

ffmpeg -c:v hevc -i in.avi -c copy out.avi
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