# Unnecessary transcoding

**URL:** <https://forums.plex.tv/t/unnecessary-transcoding/901038>\
**Category:** Plex Media Server\
**Tags:** server-linux, lg-webos\
**Created:** [January 4, 2025, 10:46pm UTC](https://forums.plex.tv/t/unnecessary-transcoding/901038 "2025-01-04T22:46:22Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![tescophil](https://avatars.discourse-cdn.com/v4/letter/t/f17d59/32.png) [@tescophil](https://forums.plex.tv/u/tescophil)\
**Post date:** [January 4, 2025, 10:46pm UTC](https://forums.plex.tv/t/unnecessary-transcoding/901038/1 "2025-01-04T22:46:22Z")

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![Screenshot_2025-01-04-22-39-00-79_40deb401b9ffe8e1df2f1cc5ba480b12](https://global.discourse-cdn.com/plex/original/4X/2/8/0/28018082a8894bf331d4bc28a05dc86cd8d11db2.jpeg)

Why is this mp4 file, which is direct play compatable with my LG TV being transcoded to a 10Gb stream with no change of Audio or Video formats…

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**Author:** ![tom80H](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/tom80h/32/19753_2.png) [@tom80H](https://forums.plex.tv/u/tom80H)\
**Post date:** [January 5, 2025, 12:19am UTC](https://forums.plex.tv/t/unnecessary-transcoding/901038/2 "2025-01-05T00:19:10Z")

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Possibly some aspect of the video not being supported (e.g. if the video’s encoding level exceeds what the tv is capable to play, unsupported colorspace…). The audio doesn’t seem to be touched.

[Server logs](https://support.plex.tv/articles/200250417-plex-media-server-log-files/) should list the specific reason.

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**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\
**Post date:** [January 5, 2025, 1:12am UTC](https://forums.plex.tv/t/unnecessary-transcoding/901038/3 "2025-01-05T01:12:43Z")

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If I may add?

I have a LG C1.

The TV-resident app has strict requirements about what it accepts.

It you look at the window:

1. Audio = Unchanged
2. Video = Unchanged
3. Container – Convert from MP4 → MPEGTS.  
– This is a REMUX-only

The TV app wants the audio & video in a .TS container.

The 10 Gbps is the degenerate case PMS reports then only the container changes because neither video nor audio is changing.

In most cases, PMS will make this conversion on its own without the transcoder.

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**Author:** ![tescophil](https://avatars.discourse-cdn.com/v4/letter/t/f17d59/32.png) [@tescophil](https://forums.plex.tv/u/tescophil)\
**Post date:** [January 5, 2025, 12:25pm UTC](https://forums.plex.tv/t/unnecessary-transcoding/901038/4 "2025-01-05T12:25:24Z")

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It’s weird, because I re-encode everything to mp4 using ffmpeg

ffmpeg -n -i “$f” -c:v libx264 -crf 28 -c:a aac “${f%.\*}.mp4”

and this is the only file that does this. It happens on both my LG TVs, but does direct play on mobile and desktop systems…

I’m only running Plex on a Pi4 and this one transcode kills the whole system CPU wise with the stream stopping every 20 seconds or so

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**Author:** ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)\
**Post date:** [April 5, 2025, 12:25pm UTC](https://forums.plex.tv/t/unnecessary-transcoding/901038/5 "2025-04-05T12:25:37Z")

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