[Ffmpeg-devel-irc] ffmpeg.log.20180716

[burek]

[00:44:54 CEST] <kubast2> Does libaom-av1 use h.264 https://i.imgur.com/x8CdYDo.png ?
[00:45:14 CEST] <kubast2> I never seen it print out hex too
[00:45:26 CEST] <kubast2> I didn't tried like 1080p encode before
[00:45:33 CEST] <kubast2> or usage of -threads 4 so
[00:46:18 CEST] <furq> kubast2: that message is from the decoder
[00:46:41 CEST] <kubast2> oh
[00:47:18 CEST] <furq> i'm not sure what the hex dump is but i guess that's some libaom debug thing
[00:54:08 CEST] <nicolas17> is it possible to know which of two videos has better quality, without having a max-quality "original" to compare to? I suspect A was transcoded into B, and possibly B has higher bitrate (thus bigger filesize), but obviously B will have lost quality vs A
[00:56:18 CEST] <furq> nothing better than just using your eyes
[00:56:35 CEST] <nicolas17> okay
[00:56:48 CEST] <nicolas17> that's what I thought...
[01:08:57 CEST] <nicolas17> when someone streams to Twitch at 720p30, the player lets you select "720p" or "720p (source)", they correspond to HLS .m3u8 URLs containing /720p30/ or /chunked/ respectively, I *suspect* the source/chunked one is the "original" and all other variants (even the one with the same resolution!) are transcoded from it
[01:10:56 CEST] <BtbN> The one called Source is always the best possible.
[01:11:19 CEST] <nicolas17> I wonder why they transcode it to "720p30" with *higher* bitrate
[01:12:03 CEST] <BtbN> Because they only have a defined set of transcodes. They never increase res/framerate, but otherwise they just have their fixed set
[01:12:26 CEST] <DHE> maybe in case someone encodes at yuv444 so they produce yuv420 ?
[01:12:36 CEST] <BtbN> They will straight up reject that
[01:12:55 CEST] <BtbN> Your original input stream has to be playable by browsers
[01:14:00 CEST] <nicolas17> oh wow I just compared the two, they don't even have the same brightness
[01:14:10 CEST] <nicolas17> possibly because:
[01:14:22 CEST] <nicolas17> 720p60/1000.ts: yuv420p(progressive)
[01:14:32 CEST] <nicolas17> chunked/1000.ts: yuv420p(tv, bt470bg/unknown/unknown, progressive)
[01:15:08 CEST] <nicolas17> that's color space right?
[12:31:30 CEST] <blair_> hi all
[12:32:27 CEST] <blair_> is it possible to use av_read_packet with h264 then pull out the frames with av_parser_parse2? I want to get raw frames and then send to cuda
[12:33:13 CEST] <blair_> I have a camera I am reading the frames from in a loop then just need to pull out the uncompressed data
[12:33:25 CEST] <blair_> or am i missing something
[12:34:40 CEST] <DHE> just a raw h264 bitstream?
[12:34:54 CEST] <blairdavidson> believe so
[12:36:02 CEST] <blairdavidson> it all works when i decode it with ffmpeg but i want to move the work now to the gpu so i want to skip this step
[16:52:54 CEST] <utack> does anyone know what is going on at doom9?
[16:53:14 CEST] <JEEB> swede's apartment went offline again?
[16:53:17 CEST] <JEEB> if it's down
[17:02:59 CEST] <DHE> seems down for me...
[17:03:45 CEST] <JEEB> but yes, it's hosted in the swede's basement (without any jokes)
[17:05:37 CEST] <DHE> oh my... it is...
[17:08:00 CEST] <utack> lol JEEB
[17:08:03 CEST] <utack> i did not know that
[17:11:51 CEST] <DHE> which is a shame because I was just googling something with doom9 results...
[17:12:04 CEST] <DHE> oh well, cached view ftw
[17:41:52 CEST] <Hello71> been down since two days ago I think
[17:46:55 CEST] <DHE> :(
[21:16:56 CEST] <kgrid03> Hi! I am new to command prompts, and only started using it for ffmpeg because that is the only way I can convert .flv files to .avi or another useable format for premiere pro. I downloaded a static 64 bit version of ffmpeg and set up my path in my PC's extended variables.  I had some trouble with "access is denied" and "permission is denied" so I changed my system 32 ownership to admin and my user, changing the settings to
[21:16:56 CEST] <kgrid03> full control, and I also turned of my UAC, and only run command as an admin. I also had problems with "there is no such file in this directory" and "this is not a valid command (giving me 3 options of what would be". This is the closest I have gotton for it to work, as it seems to want to convert the file, but I cannot find a converted file anywhere in my PC. This is what the command prompt is giving me, and I can't exactly
[21:16:56 CEST] <kgrid03> tell what it is.C:\WINDOWS\system32>ffmpeg -i c:\users\kgrid03\videos\whereclips\opening\CarlS.flv CarlS.avi
[21:16:56 CEST] <kgrid03> ffmpeg version 4.0.1 Copyright (c) 2000-2018 the FFmpeg developers
[21:16:56 CEST] <kgrid03>   built with gcc 7.3.1 (GCC) 20180710
[21:18:37 CEST] <Hello71> so... "I reverted to windows xp nonsecurity"
[21:32:33 CEST] <DHE> shoutouts to irccloud for just flooding people out
[21:52:34 CEST] <automatical> hi folks, I'm tryin to do some live encoding of a network camera that I'm capturing over TCP - is there a way to have ffmpeg duplicate the last good frame when a frame is dropped?
[22:11:21 CEST] <Hello71> maybe but why
[00:00:00 CEST] --- Tue Jul 17 2018