wrong size detection: 1080 vs 720

[mholin 23]

Hi guys

today I would like to report this issue, what I was facing quiete a long time now.

I found, that movies in my collection, with are encoded as 1080p would be listed as 720p type on the client, when I try to adjust playback-bitrate.

I give you two examples:

"Angry Silence" encoded 1800x1080. Playback bit rate can only be changed with 720 value. Both on Browser and Android app.

"Murder by Contract" encoded 1408x1080. same

it looks like, playback values are not set by vertical value 1080 but by horizontal 1800 or 1408, which is lower than 1920.

can this be checked and corrected?

It affects almost every 4:3 movies.

bye

Michael

[mholin 23]

Only my problem?

Does nobody else see this issue?

Greetings Michael

[Carlo 4561]

Hi, Do you have similar files with higher bitrates?

If so what choices do you get for them?

Edited December 28, 2020 by cayars

[mholin 23]

I do not believe this is an issue of bitrate.

Here is my version of 1968 'Deadfall"

All my movies with horizontal pixel between I guess 1280 - 1800 are tagged as 720p movie during playback.

This really does affect all my 4:3 and 5:3 movies.

Nobody else with this issue here? strange

Edited December 29, 2020 by mholin

[pwhodges 2012]

I can confirm that when playing a 4:3 movie at 1080 resolution, the quality selection options all say 720.  However, when I selected one the stats for nerds still showed the displayed video as being 1480x1080 (in my case).  So I suspect it's just a display oddity which doesn't affect the actual processing.

Paul

Edited December 29, 2020 by pwhodges

[Carlo 4561]

Thanks Paul.

@mholin Can you confirm the same thing using stats for nerds?

[mholin 23]

I did a further analysis on the 'Deadfall' movie.

During playback, I only see bitrate options to set with max 720p 10 mbit.

I choosed 720p 10 mbit. Here are some lines from ffmpeg-transcode log:

18:25:34.042     encoder         : libebml v1.2.2 + libmatroska v1.3.0
18:25:34.042     creation_time   : 2013-12-05T07:03:53.000000Z
18:25:34.042   Duration: 01:59:51.26, start: 0.000000, bitrate: 11756 kb/s
18:25:34.042     Stream #0:0: Video: h264 (High), yuv420p(progressive), 1792x1080, SAR 1:1 DAR 224:135, Level 41, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
18:25:34.043     Stream #0:1(ger): Audio: ac3, 48000 Hz, stereo, fltp, 640 kb/s (default)
18:25:34.043     Metadata:
18:25:34.043       title           : German
18:25:34.043     Stream #0:2(eng): Audio: ac3, 48000 Hz, stereo, fltp, 640 kb/s
18:25:34.043     Metadata:
18:25:34.043       title           : English
18:25:34.296 Stream mapping:
18:25:34.296   Stream #0:0 -> #0:0 (h264 (h264_cuvid) -> h264 (h264_nvenc))
18:25:34.296   Stream #0:1 -> #0:1 (ac3 (native) -> mp3 (libmp3lame))
18:25:34.296 Press [q] to stop, [?] for help
18:25:34.432 Output #0, segment, to 'v:\transcoding-temp\81D384_%d.ts':
18:25:34.432   Metadata:
18:25:34.432     encoder         : Lavf58.35.100
18:25:34.432     Stream #0:0: Video: h264 (h264_nvenc) (High), cuda, 1792x1080 [SAR 1:1 DAR 224:135], q=-1--1, 9360 kb/s, 23.98 fps, 90k tbn, 23.98 tbc (default)
18:25:34.432     Metadata:
18:25:34.432       encoder         : Lavc58.62.100 h264_nvenc
18:25:34.432     Side data:
18:25:34.432       cpb: bitrate max/min/avg: 9360000/0/9360000 buffer size: 18720000 vbv_delay: N/A
18:25:34.433     Stream #0:1(ger): Audio: mp3 (libmp3lame), 48000 Hz, stereo, fltp, 192 kb/s (default)

then I choosed 720p 6 mbit. Here are some lines from ffmpeg-transcode log:

10:44:27.878     encoder         : libebml v1.2.2 + libmatroska v1.3.0
10:44:27.878     creation_time   : 2013-12-05T07:03:53.000000Z
10:44:27.878   Duration: 01:59:51.26, start: 0.000000, bitrate: 11756 kb/s
10:44:27.879     Stream #0:0: Video: h264 (High), yuv420p(progressive), 1792x1080, SAR 1:1 DAR 224:135, Level 41, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
10:44:27.879     Stream #0:1(ger): Audio: ac3, 48000 Hz, stereo, fltp, 640 kb/s (default)
10:44:27.879     Metadata:
10:44:27.879       title           : German
10:44:27.879     Stream #0:2(eng): Audio: ac3, 48000 Hz, stereo, fltp, 640 kb/s
10:44:27.879     Metadata:
10:44:27.879       title           : English
10:44:28.236 Stream mapping:
10:44:28.236   Stream #0:0 -> #0:0 (h264 (h264_cuvid) -> h264 (h264_nvenc))
10:44:28.236   Stream #0:1 -> #0:1 (ac3 (native) -> mp3 (libmp3lame))
10:44:28.236 Press [q] to stop, [?] for help
10:44:28.477 Output #0, segment, to 'v:\transcoding-temp\758BCE_%d.ts':
10:44:28.477   Metadata:
10:44:28.477     encoder         : Lavf58.35.100
10:44:28.477     Stream #0:0: Video: h264 (h264_nvenc) (High), cuda, 1792x1080 [SAR 1:1 DAR 224:135], q=-1--1, 5360 kb/s, 23.98 fps, 90k tbn, 23.98 tbc (default)
10:44:28.477     Metadata:
10:44:28.477       encoder         : Lavc58.62.100 h264_nvenc
10:44:28.478     Side data:
10:44:28.478       cpb: bitrate max/min/avg: 5360000/0/5360000 buffer size: 10720000 vbv_delay: N/A
10:44:28.478     Stream #0:1(ger): Audio: mp3 (libmp3lame), 48000 Hz, stereo, fltp, 192 kb/s (default)

it looks like, the 720p from the 'quality menu' is ignored, but the bitrate is set properly.

 

[Carlo 4561]

Did you take a look at the video in Stats for Nerds as well?  That should also confirm the resolution being played which might be easier than looking at logs.