[Ffmpeg-devel-irc] ffmpeg.log.20160930

[burek]

[00:03:44 CEST] <tdr> transhuman, found a post where someone says  adding -demuxer mov to his before the output file name  fixed his same error, trying adding that with the write format of file (if you're not using mov)
[00:05:14 CEST] <tdr> eh that may be a switch to his mplayer he was using ffmpeg through
[00:25:00 CEST] <transhuman> ok can i see the link ?
[00:30:10 CEST] <TwinTailed> I've got a problem with LibAV (FFMpeg version), its that I can't set H264 video to high, the log says that the profile is High, but the generated MP4 is Baseline
[00:33:02 CEST] <TwinTailed> And what does "shifted frame pts," debug message mean?
[00:34:15 CEST] <TwinTailed> what about "forced frame type (5) at 2648 was changed to frame type (3)"? What does it mean
[00:45:36 CEST] <transhuman> tdr problem with the & method is that it gives me no way of telling when all the ffmpeg manipulations have completed
[00:47:29 CEST] <TwinTailed> I will be online for a while if anyone knows the answer to any of my questions please reply to me
[00:48:00 CEST] <markvandenborre> hi... can anyone around here say anything useful about multithreading and h264
[00:48:01 CEST] <markvandenborre> ?
[00:48:30 CEST] <markvandenborre> when compressing files, h264 seems incredibly efficient in working all the cores
[00:48:49 CEST] <markvandenborre> but I wonder how things will be different for streams...
[00:49:03 CEST] <markvandenborre> any comments welcome!
[00:49:36 CEST] <DHE> yes, libx264 is multi-threaded to the extreme. but too many threads will also compromise image quality
[00:49:57 CEST] <DHE> what do you mean by "streams" ?
[00:50:36 CEST] <TwinTailed> DHE: what does "shifted frame pts," debug message mean?
[00:50:56 CEST] <TwinTailed> DHE: [mov,mp4,m4a,3gp,3g2,mj2 @ 0090bc20] shifted frame pts, curr_cts: 5394138 @ 1165
[00:50:57 CEST] <TwinTailed> , ctts: 3754, ctts_count: 28196
[00:51:19 CEST] <DHE> TwinTailed: stop asking me random questions directly
[00:53:31 CEST] <TwinTailed> DHE: you know that ffmpeg's documentation doesn't cover much, so i'm somehow desperate for help
[00:53:48 CEST] <TwinTailed> especially when it comes to LibAV and Libx264
[00:54:20 CEST] <DHE> you know I'm not an ffmpeg dev and my scope of knowledge is limited
[00:56:23 CEST] <TwinTailed> you helped me many times before
[00:56:48 CEST] <markvandenborre> DHE: we're looking into encoding for 24 parallel rtmp streams for a big FOSS conference
[00:57:02 CEST] <markvandenborre> 720p25 video
[00:57:45 CEST] <markvandenborre> we can get hold of a pile of Intel Xeon E7530 servers (quad hexacore, 2 threads per core, so 48 threads/machine)
[01:00:10 CEST] <markvandenborre> DHE: I'm researching this for https://fosdem.org
[01:05:29 CEST] <markvandenborre> so I really appreciated your comment
[01:24:14 CEST] <Atm0spher1c> hello, how can I rate limit ffmpeg stream?
[01:25:01 CEST] <Chloe> try -re
[01:25:31 CEST] <llogan> that's a somewhat vague question
[01:26:54 CEST] <TwinTailed> Chloe, can I ask you something about libav (ffmpeg)?
[01:27:43 CEST] <Chloe> TwinTailed: I probably wouldnt be able to answer it if it's an API question, but others might
[01:28:45 CEST] <TwinTailed> why my output MP4 file shows black screen (audio plays) on QuickTime and Windows Media Player? Even though the pix format is shown yuv420p on MediaInfo
[01:28:59 CEST] <TwinTailed> On VLC and FFMPEG based players, it plays normally
[01:30:43 CEST] <markvandenborre> TwinTailed: ffprobe ?
[01:31:17 CEST] <Atm0spher1c> Chloe: thanks. basically wondering if its possible to set the download rate in bytes per second for example.
[01:31:25 CEST] <Atm0spher1c> download rate is too fast, i want to slow it down
[01:31:41 CEST] <markvandenborre> that should give you some info on encoding
[01:31:53 CEST] <Chloe> Atm0spher1c: wow! more information, but stilll not enough. What command are you actually running?a
[01:36:43 CEST] <TwinTailed> here is my ffprobe http://pastebin.com/t3VuDY0X
[01:41:56 CEST] <Atm0spher1c> Chloe: llogan https://paste.debian.net/845976/
[01:43:57 CEST] <llogan> Atm0spher1c: why did you not include the complete console output?
[01:45:43 CEST] <Atm0spher1c> honestly, im running it from a python script that doesnt include console output
[01:46:15 CEST] <llogan> not much we can do without it
[01:46:58 CEST] <Chloe> Atm0spher1c: run it outside of the script?
[01:47:06 CEST] <Atm0spher1c> without console output you don't know if ffmpeg has an option --rate-limit 300k?
[01:52:06 CEST] <DHE> markvandenborre: ffmpeg can be run in the background with nohup and parameter -nostdin
[01:52:32 CEST] <DHE> alternatively I'm a fan of running in a screen (or tmux if you prefer) session so you can attach to it later and see any errors or stats
[01:53:17 CEST] <DHE> right now ffmpeg has a bit of a flaw that it needs a working stdin, hence the above "requirements"
[01:54:41 CEST] <TwinTailed> Does anyone know what "Duration_LastFrame" means in MediaInfo?
[02:00:21 CEST] <iive> i don't know, but my guess would be that it indicates
[02:00:35 CEST] <iive> how log the audio keeps playing after the last video frame
[02:01:46 CEST] <TwinTailed> iive: and if its negative?
[02:02:16 CEST] <iive> it probably means the audio stops before the video
[02:03:33 CEST] <TwinTailed> I see... thank you :)
[02:45:33 CEST] <TwinTailed> does anyone know what "forced frame type (3) at 2999 was changed to frame type (1)" means?
[02:48:30 CEST] <DHE> produced by which AVClass?
[02:50:53 CEST] <TwinTailed> DHE: its produced by libx264
[02:52:25 CEST] <DHE> you requested a P-frame but x264 called bullshit and turned it into a keyframe
[04:35:04 CEST] <rue_house> I'm trying to recode a video from my camera, which has like no encoding so its huge
[04:35:12 CEST] <rue_house> [mp2 @ 0x845f4d8]Sampling rate 8000 is not allowed in mp2
[04:35:20 CEST] <rue_house> from ffmpeg -i p1080476.mov video.mpg
[04:35:23 CEST] <rue_house> help?
[04:37:32 CEST] <c_14> Did you build that version of ffmpeg yourself?
[04:37:41 CEST] <c_14> Is there any specific reason you're using the mpg container?
[04:37:51 CEST] <c_14> Have you tried using -c:a copy?
[04:38:36 CEST] <rue_house> I just need it encoded to anything thats not 1G
[04:38:45 CEST] <rue_house> VO: [x11] 640x480 => 640x480 Planar YV12
[04:38:54 CEST] <rue_house> I think its not that compressed out of the camera
[04:39:43 CEST] <rue_house> what should I use?
[04:39:59 CEST] <rue_house> I just dont want to uplaod it to youtube in its 1G size
[04:40:12 CEST] <c_14> If you don't care about the container, just use .mkv
[04:40:20 CEST] <rue_house> ok
[04:40:50 CEST] <rue_house> is that copressed at all?
[04:40:55 CEST] <rue_house> heh cant type
[04:41:28 CEST] <c_14> a container is just a container, but the default codecs ffmpeg chooses for matroska should be libx264 and internal aac (or if you don't have libx264, mpeg4)
[04:41:49 CEST] <c_14> You might want to set a bitrate for aac (not sure what it defaults to), libx264 defaults to crf 23 preset medium which is probably fine
[04:42:22 CEST] <rue_house> my experience with camera footage is that even recoding it to the same thing, with no quality loss, results in a file half the sizze
[04:42:53 CEST] <rue_house> Unable for find a suitable output format for 'video.mkv'
[04:42:58 CEST] <rue_house> FFmpeg version SVN-r5826, Copyright (c) 2000-2004 Fabrice Bellard
[04:43:14 CEST] <c_14> wooooow
[04:43:20 CEST] <rue_house> it finished an mpg but the quality is horrid, can I just bump it a bit?
[04:43:21 CEST] <c_14> Are you by any chance a time traveller?
[04:43:30 CEST] <rue_house> yea, I came from yesterday
[04:43:36 CEST] <rue_house> I am from the past
[04:43:37 CEST] <c_14> The year 2004 called, they want their code back
[04:43:49 CEST] <c_14> get a static build from https://www.johnvansickle.com/ffmpeg/ and try with that
[04:43:54 CEST] <rue_house> k whatever can you help me bump the codec quality?
[04:43:56 CEST] <c_14> (or build from source, or get a better distro)
[04:44:04 CEST] <rue_house> no lets not recompiel my computer now
[04:44:12 CEST] <c_14> Use a newer build of ffmpeg, it'll look better
[04:44:30 CEST] <rue_house> can I just tell the mpeg encoder to be high quality?
[04:44:37 CEST] <c_14> more or less
[04:44:42 CEST] <c_14> set -b:a to something high(ish)
[04:44:45 CEST] <rue_house> k, how would I do that?
[04:44:48 CEST] <c_14> -b:a 2m or something
[04:44:50 CEST] <c_14> maybe
[04:44:53 CEST] <rue_house> ok
[04:45:29 CEST] <rue_house> is the a litteral or 2m?
[04:45:56 CEST] <c_14> literally add '-b:a 2m' (without the quotes) before output.mpeg
[04:46:16 CEST] <rue_house> ffmpeg: unrecognized option '-b:a'
[04:46:19 CEST] <rue_house> its older than that
[04:46:30 CEST] <c_14> -ab 2m
[04:46:37 CEST] <rue_house> -b?
[04:46:43 CEST] <c_14> eh, right
[04:46:45 CEST] <c_14> -b
[04:46:47 CEST] <c_14> -ab is audio
[04:46:52 CEST] <c_14> It's either -b or -vb
[04:47:38 CEST] <rue_house> hmm I wonder if its encoding it at 2kb/s ....
[04:47:56 CEST] <rue_house> Output #0, mpeg, to 'video.mpg':
[04:47:56 CEST] <rue_house>   Stream #0.0: Video: mpeg1video, yuv420p, 640x480, q=2-31, 2 kb/s, 30.00 fps(c)
[04:48:08 CEST] <rue_house> the audio is 64k/s so...
[04:48:13 CEST] <rue_house> hahahaha
[04:48:17 CEST] <_merlim_> the ffprobe on my osx was updated and now I am getting a "-d,: No such file or directory" on my command line to calculate resolutions, that used to work fine until now
[04:48:21 CEST] <rue_house> I'm gonna get 3 pixels per fame
[04:48:42 CEST] <rue_house> Stream #0.0: Video: mpeg1video, yuv420p, 640x480, q=2-31, 2000 kb/s, 30.00 fps(c)
[04:48:44 CEST] <rue_house> there we go
[04:50:30 CEST] <_merlim_> fflogger: https://arin.ga/H8YhCe/raw
[04:51:50 CEST] <_merlim_> oh gosh found the problem, so ashamed I created a usr/bin/ script with the name of "cut"
[04:52:04 CEST] <c_14> That'll do it
[08:38:21 CEST] <maziar> please somebody help me
[09:00:04 CEST] <retard> you're not making it easy
[12:25:10 CEST] <jsodjfcn> cmd shows this message - "Using AVStream.codec  to pass codec parameters to muxers is deprecated, use ACStream.codecpar instead". what does it mean ?
[12:25:24 CEST] <BtbN> It means the tool you are using is deprecated API.
[12:25:44 CEST] <jsodjfcn> so what to do now ? BtbN
[12:25:47 CEST] <BtbN> nothing
[12:26:02 CEST] <BtbN> It's just deprecated, not gone or broken.
[12:26:17 CEST] <jsodjfcn> while joining twoo videos, second part video is not playing. its the message inbetween cmd window
[12:27:04 CEST] <jsodjfcn> BtbN: ?? ^^^
[12:27:28 CEST] <BtbN> The message has no impact at all. It's just a warning to remind developers to migrate stuff.
[12:28:06 CEST] <jsodjfcn> while  joining the same 2 parts with an older version of ffmpeg, output plays fine, including 2part also
[12:28:21 CEST] <jsodjfcn> 2nd* part
[12:29:17 CEST] <jsodjfcn> BtbN: how to copy cmd output ? fflogger
[12:29:30 CEST] <jsodjfcn> BtbN: ^^
[12:29:40 CEST] <BtbN> Just Copy&Paste it.
[12:30:46 CEST] <jsodjfcn> BtbN: how to copy ? copy option is greyed out in right button click
[12:31:07 CEST] <BtbN> No idea what kind of terminal you are using and how to handle it.
[12:31:22 CEST] <BtbN> Can allways pipe it to a file and copy from that
[12:31:36 CEST] <jsodjfcn> normal cmd inbuilt windows 7
[12:31:37 CEST] <BtbN> ffmpeg ... 2>output.txt
[12:31:57 CEST] <BtbN> windows cmd can copy&paste just fine
[12:31:59 CEST] <jsodjfcn> ok 2mins
[12:32:08 CEST] <BtbN> you have to select text for the copy option to show up
[12:32:43 CEST] <BtbN> On old Windows versions like Win7 you might have to manually enter selection mode from the menu, and then copy with return.
[12:44:53 CEST] <jsodjfcn> BtbN: http://pastebin.com/CDr3zGrC
[12:54:38 CEST] <TwinTailed> does anyone know what "forced frame type (3) at 2999 was changed to frame type (1)" means?
[12:55:12 CEST] <jsodjfcn> BtbN: you there ? http://pastebin.com/CDr3zGrC
[13:04:03 CEST] <BtbN> looks about right. There must be some issue with your input files. If it worked before, you can file a bug because it's a regression.
[13:04:41 CEST] <jsodjfcn> you want input files link ? BtbN
[13:05:10 CEST] <BtbN> Can't test right now. You can open a ticket on track with them.
[13:05:34 CEST] <jsodjfcn> where and how ?
[13:07:26 CEST] <BtbN> !trac
[13:07:29 CEST] <BtbN> hm
[13:07:32 CEST] <BtbN> trav.ffmpeg.org
[13:07:44 CEST] <BtbN> or rahter, trac.ffmpeg.org ...
[13:08:01 CEST] <jsodjfcn> BtbN: how to download rtmp and rtmpe streams with ffmpeg ? BtbN also how to pause cmd window after window full of coomands, many commands just vanish up
[13:08:36 CEST] <jsodjfcn> while doing ffmpeg -help
[13:08:49 CEST] <BtbN> pipe the output in a file if you only want to see the commands
[13:08:55 CEST] <BtbN> or use | less
[13:08:58 CEST] <BtbN> if that exists on windows
[13:09:04 CEST] <BtbN> i think at least more does exist
[13:10:52 CEST] <TwinTailed> BtbN: Do you know what causes MediaInfo to result "Duration_LastFrame: -20 ms" on an H264 MP4?
[13:14:50 CEST] <jsodjfcn> BtbN: do one has to register for submitting a bug report ?
[13:14:56 CEST] <BtbN> yes
[13:16:49 CEST] <jsodjfcn> I have no account, you can register a new bug on my behalf
[13:19:26 CEST] <TwinTailed> it takes less than a minute to register one
[13:21:15 CEST] <jsodjfcn> TwinTailed: I dont want to register, if anything else, I'am ready to generate all the reports and transfer to you, if you are ok with submitting it
[13:22:09 CEST] <TwinTailed> I am as lazy as you tbh
[13:23:38 CEST] <jsodjfcn> TwinTailed: sorry, but I'm not lazy, generating bug reports and submitting them takes a lot of time than just registering an account, I'm ready for all the bug reports and works but just dont wanna register a new account
[13:47:03 CEST] <TwinTailed> How do I fix "Duration_LastFrame: -20 ms"?? Why is there a delay? (I am using LibAV FFMPEG)
[14:21:32 CEST] <mbarisa> hi guys, any idea how to propertly cut video from url, i am currently using "ffmpeg -ss 00:00:06.000 -i " + url + " -t 00:00:05.000 -c:a copy -c:v copy outputfile.mp4"
[14:21:46 CEST] <mbarisa> i think keyframe is wrong, and it cuts it wrong..
[14:22:07 CEST] <mbarisa> any idea how to get it precise
[14:24:14 CEST] <BtbN> mbarisa, if you want frame exact cutting, you have to re-encode
[14:24:25 CEST] <BtbN> otherwise it can only cut at keyframes
[14:24:45 CEST] <mbarisa> that is too expensive on mobile
[14:25:00 CEST] <mbarisa> how would this line look with re-encoding?
[14:25:13 CEST] <BtbN> don't copy, but specify any codec and its parameters you like.
[14:26:29 CEST] <nonex86> mbarisa which codec you wonna cut?
[14:26:42 CEST] <mbarisa> h264
[14:27:14 CEST] <nonex86> you need to frame precis cut from ffmpeg cli?
[14:27:32 CEST] <s0126h> i love that i can just go to wiki and make changes
[14:27:41 CEST] <mbarisa> nonex86: yeah, i think so
[14:27:58 CEST] <mbarisa> any idea?
[14:29:18 CEST] <nonex86> mbarisa, well, usually its possible to create "fast" cut of h264, reencoding just 1 or 2 gops, but not sure is it possible from ffmpeg cli
[14:30:34 CEST] <mbarisa> i think the issue is with audio/video sync for me
[14:30:42 CEST] <mbarisa> so maybe it is not ffmpeg issue
[14:31:07 CEST] <nonex86> usually its better to reencode audiostream
[14:31:19 CEST] <nonex86> its pretty fast
[14:31:35 CEST] <nonex86> and you can position the audio depending of the video frame start
[14:32:13 CEST] <nonex86> once again - i dont use ffmpeg cli, i just used ffmpeg api in my software
[14:32:23 CEST] <nonex86> wich able to cut/merge h264 streams
[14:32:38 CEST] <BtbN> audio does not have a gop inverval that makes cutting hard
[14:32:40 CEST] <BtbN> so there
[14:32:44 CEST] <nonex86> *which
[14:32:47 CEST] <BtbN> 's usually no need to eneocode it
[14:33:44 CEST] <TwinTailed> How do I fix "Duration_LastFrame: -20 ms"?? Why is there a delay? (I am using LibAV FFMPEG)
[14:33:50 CEST] <nonex86> thats if you can tolerate some stream start difference
[14:33:58 CEST] <nonex86> between audio and video
[14:34:13 CEST] <nonex86> i perefer to have audio stream start == video stream start :)
[14:34:35 CEST] <BtbN> that makes no sense, the worst difference there could be is one audio frame
[14:34:41 CEST] <BtbN> which is a couple thousand samples at max
[14:34:46 CEST] <BtbN> so, way less than a second
[14:35:02 CEST] <nonex86> maybe you right
[14:35:44 CEST] <BtbN> And it won't go out of sync. Just start the audio or video late
[14:35:53 CEST] <BtbN> Provided the player is somewhat sane
[14:36:08 CEST] <nonex86> agree, its the player problem to get it in sync
[15:27:08 CEST] <TwinTailed> Is it normal to get AVERROR(EAGAIN) for a few loops when decoding, encoding and then writing to format context?
[15:27:32 CEST] <BtbN> that's the whole point of that error code.
[15:27:36 CEST] <DHE> if you overfill or overdrain any portion of the pipeline, sure
[15:27:51 CEST] <TwinTailed> after a few loops with AVERROR(EAGAIN) coming from avcodec_receive_packet, i then start receiving packets normally
[15:28:14 CEST] <TwinTailed> so that doesn't cause a delay?
[15:28:24 CEST] <BtbN> most decoders and encoders have a delay, to re-order packages and better fill their pipeline
[15:28:31 CEST] <flux> twintailed, you mean you don't call avcodec_sennd_frame in between?
[15:28:35 CEST] <DHE> ... that's the kind of behaviour I would expect from a non-blocking TCP socket, but I don't think the encoding pipeline is non-blocking
[15:29:10 CEST] <BtbN> the usual flow is you send packets/frames until you get EAGAIN, and then you receive frames/packets until you get EAGAIN there.
[15:29:45 CEST] <flux> btbn, is that better for the encoder if you do that instead of just calling them avcodec_send/receive and dealing with the return codes?
[15:29:52 CEST] <flux> (or does it matter?)
[15:30:19 CEST] <BtbN> currently it does not matter, as there is not a single encoder implementing that new API
[15:30:29 CEST] <BtbN> so it gets mapped to the one-in one-out API internally anyway
[15:30:31 CEST] <flux> well I suppose one should call the receive function at least until it returns the EAGAIN
[15:30:41 CEST] <flux> btbn, but in future then perhaps?
[15:30:42 CEST] <TwinTailed> my loop continue; after it receives the AVERROR EAGAIN
[15:30:48 CEST] <TwinTailed> does it cause any delay?
[15:30:59 CEST] <TwinTailed> because my video is 20ms shorter than it should be
[15:31:05 CEST] <BtbN> specially hardware encoders are a lot more efficient if they have time to process multiple frames in parallel
[15:31:25 CEST] <flux> btbn, but would such a hardware just require that it has n frames lookahead, until you terminate the stream?
[15:31:49 CEST] <BtbN> at least nvenc does not require that at all
[15:31:58 CEST] <BtbN> it just gets like 200 times faster if you give it time
[15:32:24 CEST] <flux> twintailed, in a sense it causes lag, because you didn't get an encoded frame for a decoded one, the resulting video file should however contain one frame per one input frame
[15:32:42 CEST] <flux> twintailed, that the file is 20 ms shorter could be due to other reasons. do you have the same number of frames?
[15:32:56 CEST] <TwinTailed> flux: yes same number of frames
[15:33:11 CEST] <flux> in that case it's all fine.
[15:33:28 CEST] <TwinTailed> flux: when I receive AVEAGAIN should I send NULL inputs or continue normally?
[15:33:36 CEST] <flux> twintailed, continue normally
[15:33:43 CEST] <BtbN> sending NULL signals EOF
[15:33:44 CEST] <flux> twintailed, you're not terminating the stream there are you
[15:33:54 CEST] <BtbN> and will terminate encoding/decoding
[15:34:16 CEST] <TwinTailed> flux: I am "continue;"ing the loop
[15:34:26 CEST] <TwinTailed> so the loop restarts
[15:34:28 CEST] <BtbN> when you send a null packet, you will start getting EOF errors from the send function
[15:34:35 CEST] <flux> twintailed, let's say it this way: if you DO send a null, you cannot send anything to the stream anymore
[15:34:41 CEST] <BtbN> and receive will still give you frames, until it finally also ends with EOF
[15:34:51 CEST] <TwinTailed> BtbN: well then I guess its not a problem and its not the main cause of delay
[15:35:04 CEST] <flux> what do you mean by delay?
[15:35:08 CEST] <TwinTailed> BtbN: Isn't that flushing what u're talking about?
[15:35:11 CEST] <BtbN> There is no "delay" in the sense you are talking from.
[15:35:15 CEST] <TwinTailed> the duration is 20ms shorter
[15:35:15 CEST] <BtbN> That's EOF.
[15:35:23 CEST] <flux> that's not a delay
[15:35:29 CEST] <flux> that's a discrepency in the track lengths
[15:35:44 CEST] <BtbN> sounds to me like you're not propperly handling EOF and missing the last frame.
[15:35:53 CEST] <flux> you can use MP4Box -nhml or ffprobe -show_frames to see individual frame time stamps
[15:36:02 CEST] <flux> I'm guessing there's a difference there compared to the original stream
[15:36:05 CEST] <TwinTailed> BtbN: can i send u just the EOF snippet?
[15:36:14 CEST] <TwinTailed> BtbN: a few lines of code only
[15:36:16 CEST] <flux> or perhaps the original video has 20 ms no-frame-time at the beginning
[15:36:34 CEST] <BtbN> Or it does weird stuff with the timestamps and starts at -20
[15:36:47 CEST] <TwinTailed> BtbN: http://pastebin.com/4iq5UqEV
[15:36:50 CEST] <TwinTailed> thats how I EOF
[15:37:08 CEST] <flux> if you have the same number of streams in both input and output, then the difference in the track lengths must be in the frame time stamps/durations/edit lists
[15:37:24 CEST] <TwinTailed> flux: MediaInfo shows Duration_LastFrame: -20
[15:38:39 CEST] <TwinTailed> BtbN: am I EOFing right?
[15:39:30 CEST] <flux> personally I would just loop until any non-zero return value is returned
[15:39:49 CEST] <flux> but as I imagine that loop terminates, it's ok
[15:40:32 CEST] <BtbN> TwinTailed, the first while loop might discard frames.
[15:40:50 CEST] <BtbN> What if there are multiple frames to receive still?
[15:41:07 CEST] <TwinTailed> BtbN: So I should remove it?
[15:41:13 CEST] <TwinTailed> BtbN: The loop i mean
[15:41:24 CEST] <BtbN> you are also not sending any frames to the encoder
[15:41:34 CEST] <flux> you should have a loop. but the point is, what are you doing with the frames avcodec_receive_frame returns?
[15:41:37 CEST] <BtbN> just a hardcoded null, even though there might still be frames in the pipeline
[15:41:55 CEST] <BtbN> I'd say that's where your frames go missing
[15:42:12 CEST] <flux> I think it might be easier to just replace that code with a state machine that on the first round sends the NULL, on the other round exits
[15:42:18 CEST] <flux> and after the loop tou send NULL frame to the output
[15:42:29 CEST] <BtbN> if avformat signals you EOF, you keep transcoding normaly. Just send NULL to the decoder, so it starts to go EOF itself.
[15:42:43 CEST] <BtbN> When the decoders is EOF itself, you send EOF to the encoder
[15:42:51 CEST] <BtbN> Until that goes EOF as well, then you are done.
[15:43:00 CEST] <TwinTailed> BtbN: Ahaa
[16:48:22 CEST] <itt788> where on the website of ffmpeg can i find informations about compiling and most importantly the list of dependencies it needs?
[16:49:28 CEST] <pgorley> itt788: https://trac.ffmpeg.org/wiki/CompilationGuide
[16:49:28 CEST] <tdr> https://trac.ffmpeg.org/wiki/CompilationGuide
[20:20:20 CEST] <TwinTailed> BtbN: So after avformat sends EOF, I give avcodec_send_packet a NULL until avcodec_receive_frame returns EOF? After that I start giving avcodec_send_frame NULL in the same transcoding loop until avcodec_receive_packet returns EOF, then I exit?
[20:21:34 CEST] <TwinTailed> BtbN: Or should I make a new loop for send_frame/receive_packet?
[20:29:34 CEST] <DHE> one NULL to the send_packet is sufficient
[20:33:10 CEST] <itt788> does the option --enable-libvo-amrwbenc need amrwb or opencore-amr with suffice?
[20:38:15 CEST] <TwinTailed> DHE: But the next transcode loop will send normal packets
[20:41:14 CEST] <shincodex> I reset stream on eof
[20:41:51 CEST] <shincodex> freepacket -> avformat close avformatopen
[20:42:07 CEST] <shincodex> same formatContext and inputFormat I opened with in beggining
[20:42:13 CEST] <shincodex> hasnt blown up or leaked yet
[20:42:38 CEST] <shincodex> Oh but i dont send or receieve packets heh
[20:44:10 CEST] <DHE> you still need to reset the codec though, right?
[20:48:24 CEST] <TwinTailed> DHE: To whom is this message?
[22:18:12 CEST] <DelphiWorld> hey
[22:18:30 CEST] <DelphiWorld> anyone know if is it pocible to use miracast & cromCast with vitamio player?
[23:20:55 CEST] <zgreg> hey there, I see linker errors with libavutil. with VDPAU support compiled in, libavutil should link against libvdpau and libx11
[23:21:03 CEST] <zgreg> this was introduced by https://github.com/FFmpeg/FFmpeg/commit/38392b2af815898b8716826c4e29d95c04fb2647
[23:21:38 CEST] <zgreg> so I think the pkg-config file should include these libraries. or am I missing something?
[23:22:27 CEST] <zgreg> specifically, I see some failures to detect ffmpeg's VDPAU support in mpv because of this
[23:43:12 CEST] <TwinTailed> BtbN: So after avformat sends EOF, I give avcodec_send_packet a NULL until avcodec_receive_frame returns EOF? After that I start giving avcodec_send_frame NULL in the same transcoding loop until avcodec_receive_packet returns EOF, then I exit
[23:48:38 CEST] <TwinTailed> BtbN: I have made almost a state machine, but i am still getting delay/cut of 20ms
[23:49:27 CEST] <flux> twintailed, so you send null exactly once dring the lifetime of the function
[23:50:37 CEST] <TwinTailed> here is a loop which reads from the stream (avformat), and there is an int variable called "state", it is 0 by default, when avformat returns EOF, this is increased by one (once only), and if state is 1, it will avcodec_send_packet NULL only
[23:51:51 CEST] <TwinTailed> and continue as usual, until avcodec_receive_frame returns EOF, then state is increased one, when its increased, avcodec_send_frame NULL is done once and the loop continues until avcodec_receive_packet is EOF
[23:51:55 CEST] <TwinTailed> flux: ^ correct?
[23:52:09 CEST] <flux> sounds right
[23:52:31 CEST] <Venti>  /window 20
[23:52:35 CEST] <TwinTailed> flux: i guess i have missed something, im still getting the delay/cut of 20ms
[23:53:17 CEST] <flux> twintailed, but the thing is, you are not missing any frames. you said yourself that you have the same number of frames in input and output. and I very highly doubt a frame would somehow get duplicated to hide a dropped frame.
[23:53:32 CEST] <TwinTailed> flux: thats the statemachine http://pastebin.com/bVgwyfgm
[23:53:51 CEST] <TwinTailed> flux: the AV_LOG_DEBUG shows the frame number from the decoder
[23:53:56 CEST] <TwinTailed> what if the encoder is not writing it?
[23:55:04 CEST] <flux> twintailed, check the resulting file instead..
[23:55:26 CEST] <TwinTailed> I do
[23:55:29 CEST] <flux> ffprobe -show_streams foo.mp4 |grep nb_frames
[23:55:47 CEST] <TwinTailed> im on windows, no grep, but i will find u nb_frames
[23:55:49 CEST] <TwinTailed> 1 sec
[23:56:48 CEST] <flux> -show_frames will give you more information
[23:57:13 CEST] <TwinTailed> flux: nb_frames=3021
[23:57:16 CEST] <TwinTailed> which is correct
[23:57:53 CEST] <flux> so what is the timestamp of the first and last frames in the original and resulting video?
[23:57:56 CEST] <TwinTailed> flux: ah found it
[23:58:03 CEST] <TwinTailed> flux: its the sound stream with missing frames
[23:58:09 CEST] <TwinTailed> flux: 1 frame missing from audio stream
[23:58:21 CEST] <TwinTailed> nb_frames=5204 supposed to be 5205
[00:00:00 CEST] --- Sat Oct  1 2016