h265 v3.48.2 no video playback on ubuntu 20.04 / X11 / nvidia gpu

[AhTeeGuu3u]

I have a lot of issues to go through, so in order to make it easier for me to help you, I ask that you please try these things first

• Try with a different kind of file to confirm that the problem is related to just this file.
• Try with the newest version from GitHub
• Read the documentation and FAQ, Known issues, Troubleshooting
• Search for your problem under Issues or Discussions

Steps to reproduce

Open the test.mp4 (created with davinci resolve)

Expected behavior

Display video

Actual behavior

Black preview frame

Provide an error report

No error occurred.

{
"state": {
"filePath": "/home/dennis/Youtube/test.mp4",
"fileFormat": "mp4",
"externalFilesMeta": {},
"mainStreams": [
{
"index": 0,
"codec_name": "hevc",
"codec_long_name": "H.265 / HEVC (High Efficiency Video Coding)",
"profile": "Main",
"codec_type": "video",
"codec_tag_string": "hvc1",
"codec_tag": "0x31637668",
"width": 1920,
"height": 1080,
"coded_width": 1920,
"coded_height": 1088,
"closed_captions": 0,
"film_grain": 0,
"has_b_frames": 1,
"sample_aspect_ratio": "1:1",
"display_aspect_ratio": "16:9",
"pix_fmt": "yuv420p",
"level": 150,
"color_range": "tv",
"chroma_location": "left",
"field_order": "progressive",
"refs": 1,
"id": "0x1",
"r_frame_rate": "30/1",
"avg_frame_rate": "30/1",
"time_base": "1/15360",
"start_pts": 0,
"start_time": "0.000000",
"duration_ts": 304128,
"duration": "19.800000",
"bit_rate": "2519867",
"nb_frames": "594",
"extradata_size": 130,
"disposition": {
"default": 1,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0,
"timed_thumbnails": 0,
"captions": 0,
"descriptions": 0,
"metadata": 0,
"dependent": 0,
"still_image": 0
},
"tags": {
"creation_time": "2022-12-26T23:44:43.000000Z",
"language": "und",
"handler_name": "VideoHandler",
"vendor_id": "[0][0][0][0]",
"timecode": "01:00:00:00"
}
},
{
"index": 1,
"codec_name": "aac",
"codec_long_name": "AAC (Advanced Audio Coding)",
"profile": "LC",
"codec_type": "audio",
"codec_tag_string": "mp4a",
"codec_tag": "0x6134706d",
"sample_fmt": "fltp",
"sample_rate": "48000",
"channels": 2,
"channel_layout": "stereo",
"bits_per_sample": 0,
"id": "0x2",
"r_frame_rate": "0/0",
"avg_frame_rate": "0/0",
"time_base": "1/48000",
"start_pts": 0,
"start_time": "0.000000",
"duration_ts": 951296,
"duration": "19.818667",
"bit_rate": "196071",
"nb_frames": "929",
"extradata_size": 2,
"disposition": {
"default": 1,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0,
"timed_thumbnails": 0,
"captions": 0,
"descriptions": 0,
"metadata": 0,
"dependent": 0,
"still_image": 0
},
"tags": {
"creation_time": "2022-12-26T23:44:43.000000Z",
"language": "und",
"handler_name": "SoundHandler",
"vendor_id": "[0][0][0][0]"
}
},
{
"index": 2,
"codec_type": "data",
"codec_tag_string": "tmcd",
"codec_tag": "0x64636d74",
"id": "0x3",
"r_frame_rate": "0/0",
"avg_frame_rate": "15360/512",
"time_base": "1/15360",
"start_pts": 0,
"start_time": "0.000000",
"duration_ts": 304128,
"duration": "19.800000",
"bit_rate": "1",
"nb_frames": "1",
"extradata_size": 20,
"disposition": {
"default": 0,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0,
"timed_thumbnails": 0,
"captions": 0,
"descriptions": 0,
"metadata": 0,
"dependent": 0,
"still_image": 0
},
"tags": {
"creation_time": "2022-12-26T23:44:43.000000Z",
"language": "eng",
"handler_name": "TimeCodeHandler",
"timecode": "01:00:00:00"
}
}
],
"copyStreamIdsByFile": {
"/home/dennis/Youtube/test.mp4": {
"0": true,
"1": true,
"2": false
}
},
"cutSegments": [
{}
],
"mainFileFormatData": {
"filename": "/home/dennis/Youtube/test.mp4",
"nb_streams": 3,
"nb_programs": 0,
"format_name": "mov,mp4,m4a,3gp,3g2,mj2",
"format_long_name": "QuickTime / MOV",
"start_time": "0.000000",
"duration": "19.800000",
"size": "6731194",
"bit_rate": "2719674",
"probe_score": 100,
"tags": {
"major_brand": "isom",
"minor_version": "512",
"compatible_brands": "isomiso2mp41",
"creation_time": "2022-12-26T23:44:43.000000Z",
"encoder": "Blackmagic Design DaVinci Resolve"
}
},
"rotation": 360,
"shortestFlag": false,
"effectiveExportMode": "separate"
},
"platform": "linux",
"version": "3.48.2"
}

Share the file

https://drive.google.com/file/d/1E8WGCYPjmCyl9KWnV2c8tebBcgJ-qQnP/view?usp=sharing

Share log

index.jsx:14 Version 3.48.2
ffmpeg.js:61 ffmpeg -hide_banner -f lavfi -i 'nullsrc=s=256x256:d=1' -f null -
App.jsx:1908 userOpenFiles
App.jsx:1909 /home/dennis/Youtube/test.mp4
App.jsx:1511 loadMedia /home/dennis/Youtube/test.mp4 /home/dennis/Videos undefined
App.jsx:1515 state reset
ffmpeg.js:46 ffprobe -of json -show_chapters -show_format -show_entries stream -i '/home/dennis/Youtube/test.mp4' -hide_banner
ffmpeg.js:275 formats mov,mp4,m4a,3gp,3g2,mj2
ffmpeg.js:267 fileType detected format {"ext":"mp4","mime":"video/mp4"}
App.jsx:639 onDurationChange 19.818667
ffmpeg.js:46 ffprobe -v error -read_intervals '0%30' -show_packets -select_streams 0 -show_entries 'packet=pts_time,flags' -of json '/home/dennis/Youtube/test.mp4'
ffmpeg.js:46 ffprobe -v error -read_intervals '0%35.444944' -show_packets -select_streams 0 -show_entries 'packet=pts_time,flags' -of json '/home/dennis/Youtube/test.mp4'
DevTools failed to load source map: Could not parse content for file:///home/dennis/Binaries/LosslessCut-linux-x64/resources/app.asar/node_modules/cue-parser/lib/cue.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///home/dennis/Binaries/LosslessCut-linux-x64/resources/app.asar/node_modules/cue-parser/lib/cuesheet.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///home/dennis/Binaries/LosslessCut-linux-x64/resources/app.asar/node_modules/cue-parser/lib/command.js.map: Unexpected end of JSON input

[mifi]

Assuming it works in older versions. See discussion in #88

[AhTeeGuu3u]

@mifi thanks, read this. it works native on windows, hope linux support can be made possible.

[mifi]

Native support depends on having hardware decoder support as well as a decoding stack that chromium supports i think. So if h265 works in chromium on your computer then it should also work in losslesscut i think

[AhTeeGuu3u]

Have read around the internet, h265 is indeed a problem on Linux....how shouldn't it be? :).

Here is demo code, which also detects if h265 is supported, lossless cut could fall back automatically
https://codepen.io/cloudunder/post/hevc-html5-video

This embedded chrome player is able to play the test video, it uses libde265 to display it:
https://chrome.google.com/webstore/detail/h265-hevc-player/dambgipgbnhmnkdolkljibpcbocimnpd/related

Pure JavaScript HEVC/H.265 video decoding library using libde265.
https://github.com/strukturag/libde265.js

Wasm libde265 and libopus decoders for web
https://github.com/adminy/wasm-codecs

[mifi]

Do you see any onVideoError in the developer tools log after pressing "play" when you get a black screen?

[AhTeeGuu3u]

i get only this wehn hitting play
ffprobe -v error -read_intervals '0%37.700091' -show_packets -select_streams 0 -show_entries 'packet=pts_time,flags' -of json 'test.mp4'

ffplay works, so the system should be able to play it.
Maybe this helps? Simple video player using electron & ffplay (as node addon)
https://github.com/stevevista/electron-ffplay

[mifi]

If you Convert to supported format from the file menu, does it work then?

[mifi]

I think it's the same issue as #595 #975 - e.g. that chromium doesn't report an error if the codec is hevc, and will only play the audio and black video. Will fix it by adding a check using navigator.mediaCapabilities.decodingInfo