[Ffmpeg-devel-irc] ffmpeg.log.20170508

burek burek021 at gmail.com
Tue May 9 03:05:01 EEST 2017

[00:00:33 CEST] <faLUCE> just checked that avformat_open_input returns OK even if I don't give enough bytes to it
[00:04:21 CEST] <faLUCE> this is really bad. The API doesn't provide a normal/simple way to feed the muxer with arrays without blocking
[05:58:27 CEST] <kinkinkijkin> is there a vapoursynth plugin to facilitate detecting artifacts generated by functions in the current filter, and trying to correct them?
[06:02:10 CEST] <kinkinkijkin> maybe I should ask this again during active hours lol
[07:14:38 CEST] <james999> well furq is in the UK
[07:14:50 CEST] <james999> so in a few hours maybe they will be active over there.
[07:15:26 CEST] <james999> I hear Jeremy Corbyn is gonna try and be next prime minister
[07:15:59 CEST] <james999> he's like if you took bernie sanders and simply swapped one affected accent for another. :D
[07:16:53 CEST] <furq> except people actually like bernie sanders
[07:20:04 CEST] <dystopia_> labour is kinda dead atm :(
[07:20:28 CEST] <dystopia_> there is no party of opposition
[07:21:39 CEST] <furq> strong and stable
[07:24:22 CEST] <kinkinkijkin> I figured out how to remove the artifacts
[07:24:27 CEST] <kinkinkijkin> reduce blocksize
[07:24:57 CEST] <kinkinkijkin> aka "might as well just do a static reencode" levels of CPU usage and desync
[07:26:56 CEST] <james999> furq: yeah sanders has a certain new england charm in his speeches
[07:27:20 CEST] <james999> i think there's a lawsuit now atm about how the dems rigged the proc against him
[07:27:37 CEST] <james999> from the sounds of it labour needs to rig the process against corbyn or something
[07:27:50 CEST] <james999> his poll numbers are in the trash
[07:30:13 CEST] <furq> what they need is a time machine
[07:31:10 CEST] <james999> how so?
[07:31:50 CEST] <furq> they've managed to not bother taking a stance on the biggest issue people care about right now
[07:32:13 CEST] <furq> since before the referendum
[07:32:34 CEST] <james999> oh yeah. didn't some lady persuade corbyn to back down from saying anything good about brexit?
[07:32:40 CEST] <furq> shrug
[07:32:44 CEST] <furq> he's always been broadly anti-EU
[07:32:53 CEST] <furq> just for less racist reasons than everyone else
[07:32:56 CEST] <james999> i recall something like that. he was going to give a speech in favor of it
[07:33:24 CEST] <james999> speaking of racism. is it true the papers refer to pakistanis as "asians"?
[07:33:31 CEST] <furq> i mean i'd rather have him than any of the tory-lite guys he was up against in the leadership contests
[07:33:34 CEST] <james999> i heard that from a brit podcast i listen to but couldn't believe it
[07:33:47 CEST] <furq> and some of the PLP shit to try and oust him was disgraceful and has helped us into this fucking mess
[07:33:51 CEST] <furq> but he still wouldn't have won
[07:33:55 CEST] <furq> and yeah
[07:33:59 CEST] <furq> that really annoys me as well
[07:34:35 CEST] <furq> at least say "south asians" if you're not sure whether they're pakistani, bangladeshi or indian
[07:34:42 CEST] <furq> because obviously getting that wrong could cause a diplomatic incident
[07:34:59 CEST] <furq> that's worse than calling a scotsman english
[07:35:01 CEST] <james999> well it's not like britain is sillicon valley and there's a bunch of chinese living there
[07:35:10 CEST] <james999> that's what the term 'asian' means mostly in US
[07:35:15 CEST] <furq> we have quite a lot of chinese
[07:35:18 CEST] <furq> we just call them chinese though
[07:35:31 CEST] <furq> there's pretty much no koreans or japanese so it works out ok
[07:35:51 CEST] <furq> and people from vietnam or whatever have got better shit to worry about
[07:36:02 CEST] <james999> there's actually koreans living in the US so it can be ambiguous i'll grant
[07:36:22 CEST] <james999> but nobody would generally say 'asian' when refering to someone from india or pakistan. they'd say indian or pakistani
[07:36:40 CEST] <furq> i mean the reverse is true here
[07:36:43 CEST] <furq> they're both equally stupid
[07:38:01 CEST] <james999> the number of black people is pretty low in britain right?
[07:38:21 CEST] <james999> like that movie with the diamond ... uh Snatch I think
[07:38:22 CEST] <furq> about 2%
[07:38:47 CEST] <james999> like half the cast was black.there was a russian too. Boris the Blade
[07:39:12 CEST] <furq> oh nvm that's the wrong column
[07:39:13 CEST] <furq> 3%
[07:39:29 CEST] <james999> yeah, it's like 13% in the US. still lots of division as well.
[07:39:43 CEST] <james999> some school district seceded from the surrounded school districts in the south
[07:40:05 CEST] <james999> and the judge presiding over it was like "well this is racist but since 20% of the city is black I guess it's ok. but you have to have a black person on the city council"
[07:41:04 CEST] <furq> also 7% south asian
[07:41:10 CEST] <furq> which seems like more than enough to implement sharia law
[07:41:22 CEST] <furq> thanks for the warning tommy robinson
[07:41:33 CEST] <james999> lol. have you seen thos youtube videos of bearded guys hustling passing strangers
[07:41:38 CEST] <furq> yes
[07:41:41 CEST] <james999> telling them "you can't drink, this is SHARIA zone"
[07:41:58 CEST] <furq> i have seen them when americans linked them to me as evidence that britain is operating under sharia law
[07:42:00 CEST] <james999> i always thought it seemed like an uncommon thing
[07:42:09 CEST] <james999> yeah
[07:42:13 CEST] <furq> bookended by PRISON PLANET video
[07:42:14 CEST] <furq> s
[07:42:24 CEST] <james999> or like, you can't kiss or hold hands here, london has fallen to the moor at last
[07:42:31 CEST] <james999> lol yeah
[07:42:34 CEST] <furq> you'd think it would be impossible for an alex jones affiliate to be even sadder than alex jones
[07:42:49 CEST] <james999> pjw is one of the brits i listen to once in awhile
[07:42:53 CEST] <furq> on which note, did you hear alex jones lost custody of his kids
[07:43:01 CEST] <furq> "i wonder why"
[07:43:03 CEST] <james999> yeah i just read the headline
[07:43:06 CEST] <james999> lol
[07:43:16 CEST] <furq> he was probably slipping colloidal silver into their food
[07:43:21 CEST] <james999> in the court filing his attorney said his show is all an act and he's not really like that irl
[07:43:31 CEST] <furq> yeah he said it was "performance art"
[07:43:52 CEST] <james999> when I think "performance art" i think of that swiss woman with the paint eggs
[07:44:05 CEST] <furq> which he then undermined by acting exactly the same throughout the trial as he does on tv
[07:44:08 CEST] <james999> probably about the same level tbh
[07:44:48 CEST] <james999> mostly the stat I hear from pjw a lot is london is over 50% islam or something like that
[07:44:59 CEST] <james999> with the implication that the rest of the country will follow
[07:45:01 CEST] <furq> he probably found that out by leaving the house and walking around
[07:45:05 CEST] <furq> oh wait, he can't do that
[07:46:18 CEST] <james999> weird why is a jury involved with alex jones
[07:46:37 CEST] <james999> normally custody is a single judge
[07:47:04 CEST] <furq> it's probably a conspiracy
[07:47:25 CEST] <furq> it turns out the illuminati have got a great sense of humour
[07:47:27 CEST] <james999> idk if you have juries over there in britain
[07:47:39 CEST] <furq> i've never lost custody of my kids so i wouldn't know
[07:47:41 CEST] <james999> imagine trying to convince 12 strangers off the street you should have primary custody of your kids
[07:47:54 CEST] <furq> a goal i have achieved by simply not having any
[07:47:56 CEST] <furq> top tips
[07:48:54 CEST] <james999> so what's up with sadiq khan anyway
[07:49:08 CEST] <furq> he's a mayor
[07:49:09 CEST] <james999> he's always the boogie man that's dragged out to prove that london is islamified
[07:49:19 CEST] <furq> that's literally all i know about h im
[07:49:25 CEST] <furq> he's a mayor, and he's not boris johnson, so that's good
[07:49:43 CEST] <james999> boris johnson. sounds like a russian agent was he ahacker?
[07:50:01 CEST] <furq> https://upload.wikimedia.org/wikipedia/commons/thumb/3/39/Boris_Johnson_-opening_bell_at_NASDAQ-14Sept2009-3c_cropped.jpg/220px-Boris_Johnson_-opening_bell_at_NASDAQ-14Sept2009-3c_cropped.jpg
[07:50:02 CEST] <james999> more to the point, did he sell illegal firearms from his house to gangsters?
[07:50:13 CEST] <furq> this is a real person and not an anthropomorphic claymation dog
[07:50:22 CEST] <furq> he's also the foreign secretary because of course he is
[07:50:54 CEST] <james999> http://static.srcdn.com/wp-content/uploads/rade-sherbedgia-taken-2.jpg
[07:51:04 CEST] <furq> i'm pretty sure i found the least embarrassing picture of him on google images
[07:51:17 CEST] <james999> ^that's what I picture someone named Boris looking like
[07:51:23 CEST] <furq> i wish
[07:55:16 CEST] <kinkinkijkin> how do I use vapoursynth with ffmpeg?
[07:55:38 CEST] <furq> vspipe -y foo.py - | ffmpeg -i - ...
[07:55:53 CEST] <kinkinkijkin> ah thanks
[07:56:14 CEST] <furq> you can ignore the thread_queue_size warnings
[07:56:41 CEST] <kinkinkijkin> anything special I have to put in the ffmpeg options or the vs script?
[07:56:57 CEST] <furq> nothing that comes to mind
[07:57:00 CEST] <kinkinkijkin> thanks
[07:57:07 CEST] <furq> vspipe is video only so obviously you'll need a separate audio input
[07:58:03 CEST] <kinkinkijkin> is there a way to specify the video input from one file and the audio input from the same file in this chain of commands?
[07:58:18 CEST] <furq> -i - -i bar.ts
[07:58:51 CEST] <furq> you might need -map but probably not
[07:59:23 CEST] <kinkinkijkin> so my source file has a video, and audio, and a subtitle
[07:59:31 CEST] <kinkinkijkin> could you put that in an example command?
[07:59:37 CEST] Action: james999 notes the subtle shift from - meaning stdout to stdin
[07:59:40 CEST] <furq> that should just work
[07:59:54 CEST] <kinkinkijkin> oki
[07:59:55 CEST] <furq> ffmpeg will pick the first video, audio and subtitle track it finds
[08:00:07 CEST] <furq> if it doesn't then -map 0:v -map 1:a -map 1:s
[08:00:19 CEST] <furq> if you have dual audio or something then you'll need that
[08:01:41 CEST] <kinkinkijkin> wait so where do I specify my video file initially?
[08:02:22 CEST] <furq> in the vapoursynth script
[08:03:17 CEST] <kinkinkijkin> I don't know python, do I have to send a "load file" thing?
[08:03:34 CEST] <kinkinkijkin> my schooling went straight from turing to java
[08:04:38 CEST] <james999> rather like discussing architecture by going from da vinci to soviet designs
[08:04:38 CEST] <furq> http://vpaste.net/QrrKR
[08:04:40 CEST] <furq> something like that
[08:04:59 CEST] <kinkinkijkin> thanks
[08:06:04 CEST] <james999> gotta get russian hacking out of my brain. :(
[08:09:15 CEST] <kinkinkijkin> hmm, what is a way to read the input file's framerate with vapoursynth while vapoursynth is not running slave to a player?
[08:09:49 CEST] <kinkinkijkin> er
[08:09:56 CEST] <kinkinkijkin> nvm
[08:10:36 CEST] <kinkinkijkin> actually yeah
[08:15:24 CEST] <kinkinkijkin> furq do you know how to check a file's source fps?
[08:38:33 CEST] <teratorn> kinkinkijkin: ffprobe can sometimes show you a correct fps, or a tool like mediainfo
[10:56:36 CEST] <Guest15272> Hello guys! I have question about resize / deinterlace filter for Intel quicksync decoding / encoding , is this place  right place to ask?
[11:08:54 CEST] <slug> hey, I have videos of unknown duration and want to generate a 2x3 thumbnail. I want to get the full duration and divide that 6 so I get 1 thumbnail with 6 scenes from the whole movie. I am currently manually specifing like this, does anyone know a better way? "select=not(mod(n\,185)),scale=800:600,tile=2x3
[11:09:42 CEST] <furq> that's the shortest command but it'll take a long time
[11:10:51 CEST] <furq> you probably want something with ffprobe -skip_frame nokey -count_frames
[11:13:35 CEST] <slug> the way I do it I sometimes end up with black boxes where I have over run the file
[11:13:58 CEST] <slug> was wondering if I coudl auto detect the frames I need to devide by
[11:14:15 CEST] <furq> that's what ffprobe -count_frames does
[11:15:28 CEST] <furq> ffprobe -skip_frame nokey -v error -select_streams v:0 -count_frames -show_entries stream=nb_read_frames -of default=nokey=1:noprint_wrappers=1 "$file"
[11:15:33 CEST] <furq> specifically that
[11:17:52 CEST] <slug> ok if I run that I get 4
[11:23:34 CEST] <slug> cheers furq I'll play around with that
[11:56:30 CEST] <MR-2> Hello!
[11:57:21 CEST] <MR-2> I'm trying to download a HLS-vtt subtitle but ffmpeg only fetches the first segment, what am i doing wrong?
[12:56:29 CEST] <termos> when reading and rescaling my first AVPacket after I open the input, the time_base in my AVCodecContext is 0/2, but it's the correct value for the succeeding packages. Is there some period after init where my AVCodecContext is not fully initialized?
[13:01:11 CEST] <nyuszika7h> I didn't do the encode, but what would cause x264 to use Baseline at L1.3 profile?
[13:01:25 CEST] <nyuszika7h> it's 720x576 at 2500 kbps
[13:04:29 CEST] <JEEB> nyuszika7h: not using CABAC or b-frames
[13:04:40 CEST] <JEEB> that ends up with baseline
[13:04:48 CEST] <nyuszika7h> but L1.3?
[13:05:12 CEST] <JEEB> not sure if that resolution/rate actually fits into that level but -level 1.3 should give you that
[13:05:28 CEST] <JEEB> libx264 would scream at you if the limits aren't handle'able
[13:05:36 CEST] <nyuszika7h> opencl=1 / cabac=0 / ref=2 / deblock=1:0:0 / analyse=0x1:0x111 / me=umh / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=250 /
[13:05:37 CEST] <nyuszika7h> keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=2500 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
[13:05:38 CEST] <JEEB> (but I think it would still encode with that levle, I think?
[13:05:54 CEST] <nyuszika7h> it plays fine and doesn't seem much worse than the others at a higher profile
[13:05:59 CEST] <JEEB> well, d'uh
[13:06:00 CEST] <nyuszika7h> though the Intel QSV decoder choked on it lol
[13:06:05 CEST] <JEEB> if you use enough rate
[13:06:10 CEST] <JEEB> anything will look good enough
[13:06:18 CEST] <JEEB> (and what is "enough" depends on the content and your eyes)
[13:06:46 CEST] <furq> yeah that just looks like a misflagged level
[13:07:08 CEST] <furq> 576p25 needs at least 3.0
[13:07:30 CEST] <nyuszika7h> yep it's 25 fps
[13:07:35 CEST] <furq> but libx264 won't stop you passing a too-low level
[13:07:54 CEST] <furq> i'm not surprised some decoders choke on it
[13:09:21 CEST] <furq> but then those are clearly custom settings and yet he's using 1-pass abr
[13:09:25 CEST] <furq> so whoever encoded this obviously sucks
[13:20:09 CEST] <denisenkoaj> Hello guys! What's principle difference between RTMP and RTSP ? I need to stream video to application on iOS and Android from mediaserver.
[13:20:09 CEST] <denisenkoaj> I already utilize stream from NGINX to iOS with RTMP and HLS, and don't know should i test RTSP or not
[13:35:36 CEST] <thebombzen> it seems weird to turn all those options off and then use me=umh
[15:06:58 CEST] <dystopia_> can i dump audio cd tracks to .wav with ffmpeg?
[15:12:37 CEST] <relaxed> dystopia_: yes if you compiled it with --enable-libcdio
[15:12:44 CEST] <furq> https://github.com/JoeLametta/whipper/
[15:12:54 CEST] <furq> that's the right thing to use on *nix atm
[15:13:18 CEST] <dystopia_> thanks guys
[15:13:26 CEST] <furq> assuming you don't want to use eac in wine
[15:16:22 CEST] <saste> dystopia: there is also a libcdio module in libavdevice
[15:17:24 CEST] <saste> dystopia: https://ffmpeg.org/ffmpeg-devices.html#libcdio
[15:19:05 CEST] <thebombzen> furq: how is there no FOSS equiavlent of EAC
[15:19:10 CEST] <thebombzen> why has nobody written this
[15:24:59 CEST] <furq> because cdparanoia hasn't been updated since 2008
[15:28:30 CEST] <furq> there have been loads of attempts to do it, but they're all based on cdparanoia, which has a known bug which results in different crcs from eac on at least one cd
[15:28:52 CEST] <furq> and evidently nobody wants to fix that bug, and nobody wants to rewrite cdparanoia
[15:53:39 CEST] <thebombzen> but if you want the CDs to bit bitexact
[15:53:45 CEST] <thebombzen> why can't you just create an ISO and use Wodim
[15:55:31 CEST] <LunaLovegood> What command arguments do I need to use to encode to 480i MPEG-2 from a 59.94 fps progressive source? (I want smooth motion at 59.94 interlaced fields per second)
[15:57:16 CEST] <BtbN> I think tinerlace does that.
[15:57:17 CEST] <BtbN> But why?
[15:57:55 CEST] <LunaLovegood> to make DVDs
[15:58:18 CEST] <LunaLovegood> from 1080p60 sources
[16:02:44 CEST] <BtbN> Does it have to be that horrible format?
[16:02:56 CEST] <BtbN> Most players play better stuff
[16:04:37 CEST] <LunaLovegood> How else do you get 60fps on a 20$ dvd player from 10 years ago then?
[16:05:47 CEST] <LunaLovegood> sorry, more like 15 years
[16:11:17 CEST] <BtbN> I don't think you can get real 60 fps at all
[16:11:50 CEST] <BtbN> you can get 60 fiels per second, so a full frame every two fields
[16:12:15 CEST] <LunaLovegood> Interlaced video does 59.94 fields per seconds. It looks real smooth on a TV with good deinterlacing, or on a CRT.
[16:12:35 CEST] <BtbN> it looks smoth because it tricks the eye
[16:13:47 CEST] <LunaLovegood> Yeah sure, but my camera records at 59.94, and it looks like crap when panning if I try to record at 29.97 instead.
[16:13:58 CEST] <BtbN> https://ffmpeg.org/ffmpeg-filters.html#tinterlace
[16:16:41 CEST] <LunaLovegood> oh yeah, ok thanks
[16:17:01 CEST] <BtbN> for 1080p60 to 1080i60 you'd probably want merge
[16:17:26 CEST] <BtbN> well, would be more like 1080p60 to 2160i60
[16:17:36 CEST] <BtbN> which you can then scale to your desired resolution
[16:17:42 CEST] <LunaLovegood> my problem with 29.97fps is probably cause there's no way to choose a longer exposure time on my video camera. It probably would look good with a 1/30 exposure time.
[16:19:09 CEST] <LunaLovegood> The scaling doesn't mess the interlace fields? I was thinking of scaling to 720x480, then tinterlace=5
[16:33:50 CEST] <Maverick|MSG> in case anyone uses handbrake: https://objective-see.com/blog/blog_0x1D.html (Mac Handbrake got hacked)
[16:35:25 CEST] <Maverick|MSG> (or rather: the handbrake mirror server was compromised)
[16:36:31 CEST] <kerio> thebombzen: it's 2017
[16:36:39 CEST] <kerio> stop buying circles made of plastic
[16:41:52 CEST] <dystopia_> i just started buying them again
[16:42:07 CEST] <dystopia_> it's nice to collect somthing physical
[16:42:17 CEST] <kerio> D;
[17:51:59 CEST] <thebombzen> kerio: I use them when I want to make a bootable install medium
[17:52:02 CEST] <thebombzen> but otherwise I don't
[17:52:18 CEST] <thebombzen> what I don't understand though is why Exact Audio Copy is necessary
[18:30:39 CEST] <cableguy> team
[18:31:00 CEST] <cableguy> how do i cap audio from this
[18:31:02 CEST] <cableguy> https://pastebin.com/yA7sZ1W2
[18:31:36 CEST] <cableguy> as you can see, you get unique token, etc
[18:31:42 CEST] <cableguy> the stream works, tested on vlc
[18:32:10 CEST] <cableguy> but ffmpeg returns multiple errors
[19:11:03 CEST] <relaxed> cableguy: ffmpeg -i input
[19:11:21 CEST] <relaxed> and quote the url
[19:18:22 CEST] <cableguy> relaxed, At least one output file must be specified
[19:18:36 CEST] <cableguy> it shows video h264 and audio aac
[19:18:41 CEST] <cableguy> but i dont need video
[19:18:43 CEST] <cableguy> i need only audio
[19:18:58 CEST] <cableguy> and untouched audio as possible, like raw audio or something
[19:20:02 CEST] <Threads> ffmpeg -i input -vn -acodec copy -y audio.mka
[19:20:55 CEST] <cableguy> uh isnt it m4a for aac
[19:21:28 CEST] <Threads> up to you what you want
[19:21:51 CEST] <cableguy> so whats the difference
[19:22:04 CEST] <Threads> container thats it
[19:22:10 CEST] <relaxed> one is matroska, the other is mp4
[19:22:29 CEST] <cableguy> container is aac for m4a like mkv for h264 no?
[19:22:40 CEST] <relaxed> just use m4a
[19:23:19 CEST] <cableguy> so this will copy the audio to m4a the same bitrate as it is on the stream url?
[19:24:00 CEST] <relaxed> it will copy the audio stream
[19:25:18 CEST] <cableguy> and how do u stop the copy
[19:26:51 CEST] <relaxed> q
[19:28:25 CEST] <cableguy> ur right, it says it right there
[19:30:13 CEST] <cableguy> what happens if i output it to .wav instead is that ok
[19:30:31 CEST] <cableguy> then i wont need to rencode it to wav from m5a
[19:30:33 CEST] <cableguy> m4a*
[19:31:26 CEST] <cableguy> hmm the .wav wont open in sound forge
[19:48:21 CEST] <cableguy> anyway
[19:48:24 CEST] <cableguy> everyone thanks for help
[19:48:26 CEST] <cableguy> cheers
[20:14:23 CEST] <faLUCE> relaxed: give your feedback too for my API usage example :-) :-)
[20:14:39 CEST] <faLUCE> like iive did
[21:55:02 CEST] <user___> anyone know if it's possible to use ffmpeg to capture webcam data, but just view it directly(locally) with mpv or vlc, etc
[21:55:40 CEST] <user___> more of a live stream, no output file,  or do i need output file, then just view the ouptut.. possible or not
[22:00:29 CEST] <vlt> user___: It's possible. There's also ffplay. Maybe it's involved.
[22:05:28 CEST] <DHE> user___: yes, ffplay is provided as a simple video player. also note the mpv and VLC are actually using ffmpeg internally for their heavy lifting so most ffmpeg supported containers/codecs/protocols do work
[22:30:00 CEST] <user___> DHE: thanks
[22:42:51 CEST] <kerio> what
[22:43:06 CEST] <kerio> are you sure that VLC uses ffmpeg?
[22:46:35 CEST] <JEEB> kerio: it can use other libraries as well for a limited set of things
[22:46:45 CEST] <JEEB> but most video and audio decoding things except for HW dec/enc are from lavc
[22:46:54 CEST] <JEEB> and demuxing can also be done through lavf
[23:09:04 CEST] <baumy> i'm trying to cut the first 1 second or so off of a video but ffmpeg -i input.mkv -ss 00:00:01 cuts the first 10 seconds, guessing this has something to do with keyframes
[23:09:07 CEST] <baumy> what is the best way around this?
[23:09:59 CEST] <user___> DHE: ffplay works great, but what about multiple inputs(usb webcams)? giving me a resource busy
[23:18:17 CEST] <kepstin> baumy: in order to cut video at arbitrary points, you have to re-encode the video (i.e. set -c:v to something other than 'copy')
[00:00:00 CEST] --- Tue May  9 2017

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