[Ffmpeg-devel-irc] ffmpeg.log.20190722

[burek]

[00:28:57 CEST] <nine_milli> blb
[03:20:00 CEST] Last message repeated 1 time(s).
[03:33:13 CEST] <sim590> I have an MKV file which is described by the following https://paste.debian.net/1092564/. I want to extract the audio from that file, process it in audacity and put it back in with ffmpeg. I did an extract that gave this https://paste.debian.net/1092565/ with the command `ffmpeg -i caméra.mkv -vn -c:a copy caméra-out.m4a`. Then, I want to put it back with the video, but when I do so, I have descyned audio
[03:33:15 CEST] <sim590> over time. At first it's good, but over time audio desyncs... What parameter should I fix in the audio encoding?
[03:33:43 CEST] <sim590> Clarification: the audio is desynced after processing it with audacity ...
[05:28:20 CEST] <dastan> hello
[05:28:33 CEST] <dastan> i finish compiling ffmpeg to work with qsv
[05:28:43 CEST] <dastan> but when i try to use it it says Unknown encoder 'h264_qsv'
[05:29:05 CEST] <dastan> why nothing is simple when we try to compile FFMPEG
[05:29:09 CEST] <dastan> is frustrating
[05:30:02 CEST] <nine_milli> blb
[05:31:37 CEST] <dastan> blb?
[07:37:12 CEST] <nine_milli> blb
[08:58:42 CEST] <hendry> hi! How do I get media from hev1 to hvc1? https://amcrest.com/forum/ip-cameras-f18/hevc-not-playable-in-safari-t12664.html
[09:00:16 CEST] <JEEB> codec_tag I think when doing -c copy
[09:15:04 CEST] <hendry> or maybe tag:v?  be good if this one documented in the wiki
[09:25:59 CEST] <JEEB> hendry: yes, -tag:v . the internal variable is codec_tag :p
[09:26:18 CEST] <JEEB> hendry: it is documented in the full manpage https://www.ffmpeg.org/ffmpeg-all.html
[09:26:23 CEST] <JEEB> "-tag[:stream_specifier] codec_tag (input/output,per-stream)"
[09:37:53 CEST] <hendry> ended up with find . -name "*.mp4" | while read fn; do test -f "$fn" && ffmpeg -y -i "$fn" -c:v copy -tag:v hvc1 -c:a copy "../hevc/$(basename $fn)"; done
[09:38:01 CEST] <hendry> went blazing fast
[09:47:42 CEST] <hendry> Are things like -movflags +faststart importing with HEVC?
[09:56:33 CEST] <JEEB> faststart is irrelevant to the codecs you're using
[09:56:53 CEST] <JEEB> it just does two-pass so that it is able to write the index at the beginning
[09:57:08 CEST] <JEEB> if you don't need the index at the beginning, you don't need faststart and the mp4 writing will go A->B
[09:57:26 CEST] <JEEB> if you do need it, you need faststart and the mp4 writing will go A->B, and then A->B again
[12:11:56 CEST] <ackjewt> I'm trying to transcode to XAVC (Sony flavor) with ffmpeg 4.1.3. ProRes 720p59.94 -> XAVC 720p59.94. Failing with "[libx264 @ 0x6caac00] FPS 59940/1000p not compatible with AVC-Intra" Command with debug output: https://paste.ubuntu.com/p/twvMBS73gk/ Any ideas?
[12:13:34 CEST] <bencoh> /41/41
[12:13:40 CEST] <bencoh> (woops)
[15:50:48 CEST] <kepstin> ackjewt: the framerate for ntsc video is 60000/1001, not 59.94
[15:51:02 CEST] <kepstin> (ffmpeg accepts the fraction syntax directly)
[15:51:20 CEST] <fsphil> that's the field rate
[15:52:03 CEST] <kepstin> well, by "ntsc" i mean the familiy of rates with the 1/1.001 factor
[15:52:16 CEST] <fsphil> the frame rate is 30/1.001
[15:52:23 CEST] <kepstin> which includes 24/1.001, 30/1.001, and 60/1.001 in HD video formats
[15:53:00 CEST] <kepstin> the video ackjewt is looking at is 720 lines tall, progressive, 60/1.001 *frame* rate.
[15:53:35 CEST] <fsphil> don't mind me, I'm just being pedantic
[16:28:32 CEST] <ackjewt> kepstin: thank you very much! I didn't know that i had to specify it that way. Its working as expected.
[16:54:26 CEST] <nine_milli> blb
[18:36:47 CEST] <dastan> hello
[18:37:11 CEST] <dastan> i am getting too many errors building a qsv compilation in ubuntu 18.04
[18:37:18 CEST] <dastan> my errors are https://pastebin.com/yidsXXZx
[18:37:28 CEST] <dastan> does someone can help me?
[18:39:32 CEST] <dastan> is there a manual to do this in the correct way without loosing my virginity, any time that  i need to compile ffmpeg is a nightmare
[18:47:25 CEST] <dastan> someone know about QSV?
[18:47:31 CEST] <dastan> please....help!!!!
[18:58:39 CEST] <nine_milli> blb
[18:59:31 CEST] <JEEB> dastan: I don't think this has too much to do with FFmpeg :P
[18:59:36 CEST] <JEEB> QSV is always problematic
[18:59:45 CEST] <JEEB> also if you want help, post your full command line and terminal output in the pastebin
[18:59:53 CEST] <JEEB> then link here
[18:59:57 CEST] <JEEB> preferably with -v verbose
[19:06:40 CEST] <dastan> https://pastebin.com/5uR6stgj
[19:06:45 CEST] <dastan> this is my configuration
[19:07:18 CEST] <dastan> is the only who shows me the h264_qsv, but when i want to use it it gives me many errors
[19:08:22 CEST] <JEEB> I hope you will re-read what I posted and think about it a bit. maybe then we'll get the possibility of helping you :P
[19:09:00 CEST] <dastan> in which part i need to put the -v option
[19:09:06 CEST] <dastan> i read what you write
[19:09:31 CEST] <JEEB> usage command, you can put it after ffmpeg's binary if you want in the command line :P
[19:09:51 CEST] <JEEB> it's a general option so I don't think it matters where you put it (before/after input etc)
[19:12:36 CEST] <dastan> i put it in the .configure, in the make or in the make install
[19:12:43 CEST] <dastan> or in all of them
[19:12:48 CEST] <JEEB> *usage*
[19:12:54 CEST] <JEEB> if you've got it compiled, that's it
[19:13:00 CEST] <JEEB> you posted errors from *usage*
[19:13:19 CEST] <JEEB> thus post the full command line and terminal output of the *usage* (preferably with -v verbose)
[19:13:27 CEST] <JEEB> not on the IRC channel, but in pastebin or so
[19:13:29 CEST] <dastan> a ok ok
[19:13:29 CEST] <JEEB> and link here
[19:13:38 CEST] <dastan> i am compiling it again
[19:13:53 CEST] <dastan> i come back when it finish and i post the command
[19:14:02 CEST] <JEEB> post the full, uncut output
[19:14:10 CEST] <JEEB> on pastebin, with the command parameters
[19:14:17 CEST] <JEEB> that's the only way to get help
[19:14:20 CEST] <JEEB> :P
[19:14:38 CEST] <JEEB> or atl east someone like me *attempting* to help you :P
[19:16:06 CEST] <dastan> the first extrange thing is vainfo only works when i put i965 in /etc/environment
[19:16:19 CEST] <dastan> if i put iHD gives me an error
[19:16:46 CEST] <JEEB> well that just means there's an issue with vaapi getting loaded with a driver? :P
[19:16:52 CEST] <JEEB> not much to do with FFmpeg
[19:17:18 CEST] <JEEB> of course it means that if you are going to attempt to utilize that driver most likely FFmpeg will not be able to use vaapi
[19:17:27 CEST] <JEEB> but I think you grasped that already :P
[19:17:32 CEST] <dastan> i know probably is not a ffmpeg error
[19:17:39 CEST] <JEEB> not probably
[19:17:44 CEST] <JEEB> vainfo has nothing to do with FFmpeg
[19:17:44 CEST] <JEEB> :)
[19:17:49 CEST] <JEEB> it is a test app for vaapi
[19:17:52 CEST] <dastan> i know
[19:17:56 CEST] <dastan> its for sure
[19:19:15 CEST] <dastan> i am searching if someone is using it with QSV support
[19:19:34 CEST] <JEEB> intel made QSV really messy
[19:19:38 CEST] <JEEB> both to build and use
[19:19:45 CEST] <JEEB> so almost nobody is using it :P
[19:20:01 CEST] <JEEB> heck, before you even needed a special intel kernel for it
[19:20:23 CEST] <JEEB> so if you can get around just using vaapi encoding
[19:20:25 CEST] <JEEB> use vaapi
[19:20:27 CEST] <JEEB> much less problemos
[19:20:55 CEST] <JEEB> https://trac.ffmpeg.org/wiki/Hardware/QuickSync
[19:21:01 CEST] <JEEB> someone has written something on the wiki about it, though
[19:21:10 CEST] <JEEB> no idea if it's any good
[19:21:11 CEST] <JEEB> :P
[20:27:29 CEST] <nine_milli> blb
[22:50:00 CEST] Last message repeated 1 time(s).
[00:00:00 CEST] --- Tue Jul 23 2019