[Ffmpeg-devel-irc] ffmpeg.log.20140203

[burek]

[02:08] <DopeLabs>  a weeee
[07:21] <anshul> Hi I am getting en error that my nb_sample are greater then frame size, what value should i set the nb_samples or what is this nb_sample and how is it related to frame size?
[07:57] <anshul> if I am transcoding audio is it compulsory to use fifo , is there any way other then using fifo
[08:05] <anshul> hey guys does any one know how nb_sample_size and frame size related
[10:30] <anshul> why we select 264 and aac codec by default in mp4 and mpeg1 and mp2 for ts
[10:51] <Mavrik> mornin
[22:58] <bornpilot> So, I have a question about using ffmpeg to live stream to youtube. I have a DSLR connected via BMD Intensity Pro using Ubuntu for the OS. I have compiled ffmpeg to use libmp3lame, libfdk_acc, libx264. I am using bmdtools and piping that to ffmpeg and my ffmpeg string is as such ffmpeg -i - -c:v libx264 -preset fast -pix_fmt yuv420p -g 60 -r 30 -bufsize 64k -c:a libmp3lame -ar 12050 -ac 0 -f flv rtmp://
[22:59] <bornpilot> I can get it to youtube however my bit rate is about 500 kbs  so the video is sub hd. Is there anything that I can do with ffmpeg to achieve a higher bit rate for HD?
[23:01] <bornpilot> I did change the audio codec from libfdk_aac to libmp3lame and lower the sample rate, this helped some.
[23:08] <znf> bornpilot, -b 1000k -minrate 1000k -maxrate 1000k ?
[23:08] <JEEBsv> just out of interest
[23:08] <znf> or, just set -b
[23:08] <JEEBsv> why -minrate
[23:08] <znf> no reason
[23:09] <JEEBsv> you need -bufsize and -maxrate to keep your stream within VBV boundaries
[23:09] <JEEBsv> -minrate is generally harmful
[23:10] <znf> (how would I get access to creating live events in youtube, btw?)
[23:11] <JEEBsv> I think their documentation states the needed things for that as far as an account is concerned
[23:11] <znf> tells me I don't have permission to view that page :-/
[23:13] <bornpilot> Let me go try that.
[23:15] <znf> bornpilot, what video size is bmdtools spitting out?
[23:16] <bornpilot> 720p
[23:18] <Mavrik> bornpilot, you're never really setting desired output resolution and bitrate are you?
[23:18] <znf> Then I'd go with -b 2500k -maxrate 4000k -bufsize 4000k
[23:18] <znf> and what Mavrik said
[23:20] <bornpilot> znf in that case would could there be an inherited minrate?
[23:20] <znf> as less as it can do, I guess
[23:20] <znf> but like JEEBsv said, you don't really want a minrate
[23:21] <bornpilot> Mavrik what is the setting for output resolution?
[23:21] Action: Mavrik gets really annoyed when people don't even bother reading the doc.
[23:22] <znf> well, ffmpeg's docs aren't exactly a lightread :P
[23:23] <Mavrik> around here people who read documents for other people are called notaries :P
[23:23] <znf> anyway, look at the -s flag
[23:23] <bornpilot> Understood.
[23:24] <znf> Mavrik, and around here a notary makes more money than most people :P
[23:24] <bornpilot> setting the bitrate worked
[23:24] <bornpilot> thanks!
[00:00] --- Tue Feb  4 2014