[Ffmpeg-devel-irc] ffmpeg.log.20180519

[burek]

[02:43:33 CEST] <akaizen> hi, im trying to get a keyframe count for a video
[02:43:44 CEST] <akaizen> I've tried this but it takes forever : "ffprobe -v error -count_frames -select_streams v:0 -show_entries stream=nb_frames -of default=nokey=1:noprint_wrappers=1 input.mp4" and only counts the number of frames
[02:43:47 CEST] <akaizen> from: https://stackoverflow.com/questions/2017843/fetch-frame-count-with-ffmpeg
[03:03:07 CEST] <furq> akaizen: -skip_frame nokey
[03:04:00 CEST] <akaizen> @furq ty - is there a way to make it faster? i jsut need a count of the keyframe no decode all of them (thats second round when I need to evenly take screenshots)
[06:42:57 CEST] <deanylev> Anyone know where I can download Linux static builds?
[06:43:06 CEST] <deanylev> The listed download site has been taken down due to lack of Patreon donations https://johnvansickle.com/ffmpeg/
[06:58:28 CEST] <akaizen> should probs get cloudflare to support mirrors
[08:27:44 CEST] <d-safinaskar> hi. i captured hundreds of hours of video using "ffmpeg -f x11grab -i :0 -c:v libx264 -preset ultrafast -qp 0 out.mkv"
[08:27:51 CEST] <d-safinaskar> are this video lossless?
[08:27:56 CEST] <d-safinaskar> i hope they are lossless
[08:55:26 CEST] <durandal_1707> d-safinaskar: it should be
[09:03:43 CEST] <d-safinaskar> durandal_1707: thanks
[10:02:06 CEST] <halfgaar> here (http://www.ffis.de/Verein/spi-en.html) it states that I should e-mail 'donation (at) ffis.de' when one makes a donation. I did so in March, and I sent an e-mail, but it bounced. I then e-mailed 'vorstand at ffis.de', but never heard anything. How do I know it arrived?
[10:23:22 CEST] <QuHno> Does someone know how to create MP4 files _exactly_ like this one? https://v.redd.it/3kia291zqagz/DASH_600_K  <- I need to create a bunch of similar files for regression tests. It looks like the bitrate is fixed to exactly 600kbps and I have absolutely no clue how to achieve that.
[12:26:48 CEST] <boobie> What does the 0-1 target RMS value in dynaudnorm equate to in db?
[12:52:11 CEST] <reujea0> how can i compile for android doies arch arm64 exist in the config?
[13:03:16 CEST] <durandal_1707> boobie: take sqrt of it
[16:38:00 CEST] <fritsch> it seems: https://ffmpeg.org/doxygen/4.0/group__lavu__frame.html#gad08c37260c53f8587fe747dba285dd70 got deprecated, but when looking at the documentation to get qp_table from side_data it says: use av_frame_get_qp_table instead? Which one should be used after deprecation?
[16:40:58 CEST] <JEEB> fritsch: well APIchanges has Add AV_FRAME_DATA_QP_TABLE_PROPERTIES and AV_FRAME_DATA_QP_TABLE_DATA.
[16:41:01 CEST] <JEEB> from March
[16:41:03 CEST] <JEEB> http://git.videolan.org/?p=ffmpeg.git;a=blob;f=doc/APIchanges
[16:41:18 CEST] <JEEB> so I would guess that is the latest QP-related thing
[16:41:31 CEST] <JEEB> I'm actually really not sure how many decoders export this data, fyi
[16:42:52 CEST] <fritsch> JEEB: problem is the documentation, it tells otherwise: don't use the side_data
[16:43:09 CEST] <fritsch> https://ffmpeg.org/doxygen/4.0/group__lavu__frame.html#ggae01fa7e427274293aacdf2adc17076bca880fdfc059a05584749d695cc54e4717
[16:43:12 CEST] <fritsch> see
[16:43:52 CEST] <JEEB> that's quite interesting indeed
[16:44:12 CEST] <JEEB> I mean, I can understand the construct of the side data being internal and then using helper functions to get it
[16:44:21 CEST] <JEEB> but if they're both deprecated then that gets pretty funky
[16:44:29 CEST] <JEEB> also generally utilize the "trunk" documentation for latest
[16:44:44 CEST] <JEEB> although I bet this particular point has no difference in either
[16:46:25 CEST] <fritsch> we use it in kodi to fill pp_postprocess
[16:46:41 CEST] <fritsch> to properly apply the filters - for nothing else really
[16:47:12 CEST] <JEEB> I poked the -devel channel to remind me of anything related to this
[16:47:37 CEST] <fritsch> it's not a biggy, just wanted to be sure I change it correctly to not run into the next deprecation
[16:47:40 CEST] <fritsch> thx much
[22:48:46 CEST] <arinov> hi guys
[22:48:57 CEST] <arinov> how to convert wav 24 -> wav 16?
[22:51:15 CEST] <furq> -i foo.wav -c:a pcm_s16le bar.wav
[22:51:35 CEST] <arinov> ah, its a pcm format
[22:51:37 CEST] <arinov> ok thanks
[22:51:42 CEST] <arinov> furq be well
[00:00:00 CEST] --- Sun May 20 2018