h265 issues

[532910]

riot-web version: 1.5.3 opened as app from https://packages.riot.im/debian plays sound but no video (preview image is always shown)

android and ios clients works fine, video is taken with org.lineageos.snap v 2.02.015 from LNGOS 16 (Android 9) H265 720p

[532910]

mpv plays it:

...
[vd] Codec list:
[vd]     hevc - HEVC (High Efficiency Video Coding)
[vd]     hevc_qsv (hevc) - HEVC (Intel Quick Sync Video acceleration)
[vd]     hevc_v4l2m2m (hevc) - V4L2 mem2mem HEVC decoder wrapper
[vd]     hevc_cuvid (hevc) - Nvidia CUVID HEVC decoder
[vd] Opening decoder hevc
...

[532910]

H264 works fine in web version: 1.5.3 opened as app from https://packages.riot.im/debian, but in ff it says the same: "No video with supported format and MIME type found."

[spacemanspiff2007]

I have the same issue and it is quite confusing since it shows the bar with video controls and the preview window but doesn't play the video.

At least a proper error message would be nice.

[t3chguy]

https://caniuse.com/#feat=hevc
Browsers just don't seem to support this yet. I don't know if the app can easily tell if your browser successfully plays the thing or not.

[spacemanspiff2007]

I understand where this is coming from, but it is really annoying that I can play some videos directly on my mobile devices but it still shows the play button in the desktop client even though it doesn't work :-(

[t3chguy]

Not really something riot can do much about. Youd have to download and use a proper media player if your browser doesn't support it

[532910]

1. riot should warn about this on upload
2. riot-web should show exact error instead of just showing no video
3. riot can recode video on upload

[spacemanspiff2007]

Not really something riot can do much about. Youd have to download and use a proper media player if your browser doesn't support it

It's okay that it doesn't play, but I expect some kind of error message.

[t3chguy]

riot should warn about this on upload

I don't think the browser even tells riot, it'll just say video/mp4

riot-web should show exact error instead of just showing no video

same case with browser not disclosing this.

riot can recode video on upload

riot-web can't without huge WASM libraries: https://www.libde265.org/blog/2014/04/10/libde265-js-javascript-hevch-265-bitstream-decoder/

[532910]

riot-web can't without huge WASM libraries

What about riot for android? I'm sure hevc uploading is more frequent for android (ios?).

[t3chguy]

wrong repo for riot-android queries, android devs don't monitor riot-web issues.

[spacemanspiff2007]

It plays on android, depending on the hardware.
I have a Sony which plays anything until x265 1080p and then just shows the image again, my OnePlus plays x265 4k.

[G2G2G2G]

This is likely never going to get added because of AV1
https://caniuse.com/av1
it's already at the status of vp9 / vp8, they're barely gaining apple support..
https://caniuse.com/webm
since apple's an AOM member I expect it'll take less than 10 years for them to add this one, hopefully.
so yea I don't see them ever adding h265 support because of royalties.
h264 has a royalty too but Cisco basically bought a license for the entire planet.

(also av1 already works, I'd recommend librav1e encoder on ffmpeg)
e.g. fmpeg -i video.mkv -c:v librav1e -b:v 500k video.webm

[t3chguy]

Closing in favour of #14330 to encompass h265/hevc issues

AV1 and WEBM should both already work