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My LG CX TV can't play some mkv videos even if the codec (HEVC) is supported and working fine with other videos.

I would like to copy the same settings from a working video and re-encode the "non working" one using ffmpeg.

How can I do?

Thanks.

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  • This is actually many questions in one, once you start digging a bit. Maybe "re-muxing" (changing container (options)) is what you want to do, if your movie really has the right codec (parameters). But maybe your dimensions are not supported... So, you need to find out, what formats your TV supports, and compare the specs with the output of mediainfo or ffprobe -i with working and non-working files. Post the media-info output of your desired file. Maybe something obvious becomes visible – Alex Stragies Mar 30 at 12:12
  • @AlexStragies NON working video: Stream #0:0: Video: hevc (Main), yuv420p(tv), 1920x818, SAR 1:1 DAR 960:409, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default) (forced) Working video: Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 1920x804, SAR 1:1 DAR 160:67, 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default) – Tony Mar 30 at 15:10
  • maybe is the audio the problem: non working video: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s (default) working video: Audio: ac3, 48000 Hz, 5.1(side), fltp, 640 kb/s – Tony Mar 30 at 15:51
  • Update your question with the additional data, do not put it in comments – Patrick Mevzek Mar 31 at 15:52
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I found a solution:

ffmpeg -i input.mkv -c:v libx265 -pix_fmt yuv420p10le -c:a ac3  output.mkv

input video:

hevc (Main), yuv420p(tv), 1920x818, SAR 1:1 DAR 960:409, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default) (forced)

input audio:

ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s (default)

output video:

hevc (Main 10), yuv420p10le(tv, progressive), 1920x818 [SAR 1:1 DAR 960:409], 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default) (forced)

output audio:

ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s (default)

So the problem is the pixel format.

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