[FFmpeg-user] movie filter concatenation removes the last frame

I'm trying to concatenate multiple videos using filter_complex. Problem is, the movie filter always removes the last frame. The more movie filters there are, the more frames are removed here are example commands to reproduce the problem ffmpeg -y -s 640x480 -f rawvideo -pix_fmt rgb24 -r 60 -i

[FFmpeg-user] find frames/images

Not sure if this has been answered before or if I should post to devel instead, but here goes. I have a vfr video I reencode the vfr in cfr ffmpeg -i INPUT -codec:a aac -b:a 128k -codec:v libx264 -crf 23 -vf "pad=width=3840:height=2160:x=0:y=312:color=black,scale=-1:720,fps=30" -preset fast

[FFmpeg-user] (no subject)

Has anyone managed to capture a feed using the "USB Capture SDI 4k" from Magewell with ffmpeg? It runs for awhile but then a 0 byte packet comes along and ffmped just stops. It doesn't quit, but the frame number just stops and it doesn't do anything after rhis. I saw 2 bugs from 2014 and both

Re: [FFmpeg-user] Streaming overseas

> Hello Louis, > > Have you take a look at SRT protocol ? > > Source code : https://github.com/Haivision/srt > > Latest FFmpeg handle this protocol (if i am not wrong). > I didn't know about it. I will try it as soon as i can. It seems interesting. Louis >

Re: [FFmpeg-user] Streaming overseas

> You can do it by 2 ways > 1. Push it as RTMP and client can then convert RTMP to HLS > > 2. However if you still see packet loss then dump stream to ts packets on > S3 or any SSD storage and serve it through CDN HLS Please don't top post thanks. Yeah I don't see any other way than to find a

Re: [FFmpeg-user] Streaming overseas

> Try rtmp Please don't top post, thanks I just tried same issue as mpegts over tcp. doesn't handle packet loss/retries well, tcp buffer exhausts itself sometimes. Louis ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

[FFmpeg-user] Streaming overseas

I was wondering if anyone had experience streaming 720p ~5000kbit/s video overseas successfully? If so which protocol did you use? I'm trying to stream between Stockholm sweden to toronto canada. Using mpegts over tcp, I sometimes get so many retries that the bandwith falls below 5MBit/s for many

Re: [FFmpeg-user] HLS accurate seeking vs MP4

> However, I have now submitted a new patch which correctly fixes the issue I > was solving. > > I took the time to reproduce your issue outlined in your original post. I > managed to reproduce it and then resolve it with this new patch. > > The patch I submit has changes to his.c (relevant to

Re: [FFmpeg-user] HLS accurate seeking vs MP4

On Thu, Oct 25, 2018 at 1:39 PM Louis Letourneau wrote: > > > However, I have now submitted a new patch which correctly fixes the issue I > > was solving. > > > > I took the time to reproduce your issue outlined in your original post. I > > managed

Re: [FFmpeg-user] HLS accurate seeking vs MP4

Not the same problem and patch doesn't fix the issue at all. Louis On Wed, Oct 10, 2018 at 5:11 AM Nick Ryan wrote: > > > I seem to be having issues seeking accurately in HLS videos, but it > > works fine in other containers (mp4, mkv, etc) > > > Hello, > > Refer to this issue which sounds the

Re: [FFmpeg-user] HLS accurate seeking vs MP4

> > > I seem to be having issues seeking accurately in HLS videos, but it > > > works fine in other containers (mp4, mkv, etc) > > > > > > Hello, > > > > Refer to this issue which sounds the same/related/similar: > > > > https://trac.ffmpeg.org/ticket/7359 > > > > I fixed this in my own ffmpeg

[FFmpeg-user] HLS accurate seeking vs MP4

I seem to be having issues seeking accurately in HLS videos, but it works fine in other containers (mp4, mkv, etc) tried with ffmpeg version 3.4.4 and master If I create an HLS video like this mkdir a;ffmpeg -y -s 640x480 -f rawvideo -pix_fmt rgb24 -r 25 -i /dev/zero -vf

Re: [FFmpeg-user] H265 conversion hardware ?

> Does anybody know of any hardware that would work with my MacBook Pro and speed up conversion to H265 (HEVC) ? AJA Corvid HEVC https://www.aja.com/products/developer/corvid-hevc I've used it extensively under Linux and they do support MAC This being said, I never tried it under MAC. (none

Re: [FFmpeg-user] why doesn't fast seeking work in live hls

so it's been in the 3.2 branch for awhile now. Louis On Fri, May 19, 2017 at 5:49 PM, Louis Letourneau <lletour...@gmail.com> wrote: > Just a question before I start diving in the code, why doesn't fast > seeking work on live hls feeds/streams/files? > > Context: > If you

[FFmpeg-user] why doesn't fast seeking work in live hls

Just a question before I start diving in the code, why doesn't fast seeking work on live hls feeds/streams/files? Context: If you create a dummy video: mkdir -p a;ffmpeg -y -s 640x480 -f rawvideo -pix_fmt rgb24 -r 25 -i /dev/zero -vf

Re: [FFmpeg-user] Append live to existing video

> What about the option "-hls_flags append_list" Well what do you know, change request from you on Aug. 11, 2016, what a terrific idea. My version doesn't have it, I'll compile a new one and try it as soon as I can. Thanks a lot Liu! That sounds exactly like what I need. Louis

[FFmpeg-user] Append live to existing video

Is it possible to start a live capture at the end of an existing video in the hls format? Say you have a captured m3u8, something happens and you want to restart ffmpeg but continue capturing at the end of the previous m3u8? I guess concat can't do it since it has to be done on complete videos.

Re: [FFmpeg-user] m3u8 seeking accuracy

> > It's missing feature iirc, if this is static file you could create > index once and use it for precise seeking after. > Didn't quite get that. Are you saying to re-encode using 'single_file' to use EXT-X-BYTERANGE elements in the m3u8? I tried and it does seem to work mkdir a;ffmpeg -y -s

Re: [FFmpeg-user] how to programmatically set live_start_index

> > Is priv_data the right parameter? I would have expected a FormatContext. > > There is a dedicated mailing list for using the FFmpeg libraries, see: > https://ffmpeg.org/contact.html I didn't see the libav-user mailing list when I first looked. I'll know next time. I finally solved the

[FFmpeg-user] how to programmatically set live_start_index

I'm not sure if this belongs in user or devel, but here goes. I'm working with m3u8 files. They can sometimes be live, sometimes VOD. For live, I need to start the processing from the start. using the command line I would ffmpeg --live_start_index 0 -i file.m3u8 [...] How do I reproduce this

Re: [FFmpeg-user] extract a segment from a live HLS encoding

> > I do realise that a wrapping HLS stream could be problematic, but still I > was wondering if a parameter existed to force it to try anyways. > > Sorry missed it in the doc -live_start_index does exactly this. If it can help someone else: ffmpeg -y -live_start_index 0 -ss 00:10:00 -i

[FFmpeg-user] extract a segment from a live HLS encoding

I'm capturing a video using: ffmpeg -y -f decklink -i "DeckLink Mini Recorder (2)@14" -pix_fmt yuv420p -vf "fps=29.97" -force_key_frames "expr:gte(t,n_forced*5)" -codec:a libfdk_aac -b:a 128k -codec:v libx264 -crf 24 -preset fast -bf 0 -hls_time 5 -hls_list_size 0 -hls_wrap 0 -hls_allow_cache 1

Re: [FFmpeg-user] m3u8 = non-monotonous DTS

> I don't use releases myself, but I always advise AV > archivists, who implement FFmpeg in their workflow, to use > the last release of an actively maintained branch. Why? > Because for the people living outside our "gang" it is much > easier to keep the software updated this way So do you

Re: [FFmpeg-user] m3u8 = non-monotonous DTS

> > "ffmpeg -loglevel verbose" at least shows you which segments are opened. > Well what do know, I should have tried that. Very useful on m3u8s. > Why do you need a release, anyway? Do you rely on getting your ffmpeg > from a distribution? > For development it doesn't really matter. For our

Re: [FFmpeg-user] m3u8 seeking issues

> I forgot to ask: Do you have samples, i.e. an m3u8 and its contained > segments, which allow to reproduce the issue? Yup I posted that earlier in the thread. https://s3.amazonaws.com/slffmpegdebug/seekProb/seekProb.m3u8 It's publicly accessible ---> From that earlier post I shared the video

Re: [FFmpeg-user] m3u8 seeking issues

> That would mean that it was only ever "fixed" (even if by accident) on > branch 3.1, while the issue remains on master? > > Then the actual causes for the issues need to be understood, not just > the commits. ;-) (I'm not volunteering, I don't understand the code.) > > Moritz Should I open a

Re: [FFmpeg-user] m3u8 seeking issues

>On Thu, Sep 15, 2016 at 10:59 AM, Moritz Barsnick wrote: > > "broken seeking" = "incorrect frame"? (You use both wordings, which is > fine - I just want to be sure.) Yes exactly. I've been running a bunch of checkouts, build, test since yesterday, it might explain my wording

Re: [FFmpeg-user] m3u8 seeking issues

> On Thu, Sep 15, 2016 at 8:45 AM, Moritz Barsnick wrote: > > The commit on master corresponding to your bisected commit on 3.1 is > 9884f17e343b37aef442fafa05bd0113cdf47087, according to the commit > message. I found that commit but it didn't fix or cause the problem on

Re: [FFmpeg-user] m3u8 seeking issues

> On Thu, Sep 15, 2016 at 6:27 AM, Carl Eugen Hoyos wrote: > Is the issue reproducible with current FFmpeg git head? Yes > Do I understand correctly that the issue is only reproducible > with FFprobe but not FFmpeg? No, I have 2 symptoms 1- Frame counts with ffprobe is too

Re: [FFmpeg-user] m3u8 seeking issues

, this seeking bug is the opposite, fine on 3.1.3 but broken on 3.1.1 and HEAD. Louis On Tue, Sep 13, 2016 at 12:44 PM, Carl Eugen Hoyos <ceffm...@gmail.com> wrote: > 2016-09-13 18:15 GMT+02:00 Louis Letourneau <lletour...@gmail.com>: > > > FFMPEG 3.1.3 with ss 0 > > ffmpeg -

[FFmpeg-user] m3u8 seeking issues

I'm a bit confused on what is expected when seeking with ffmpeg on m3u8 files. I was trying to get frame 43 from a m3u8. I converted the frame to time in seconds and when I extract that frame, the frame that I get is WAY off. about 10 seconds off. I did some tests and: FFMPEG 3.1.1 with ss 0

Re: [FFmpeg-user] view mp4 while still encoding?

If you encode your mp4 with '*-movflags faststart' it will put the moov atom at the beginning of the movie. This way ffplay can play it BUT it won't play it until the end.* *You'll just see the state of the video when you started ffplay.* *To see the encoding live until it ends, you need

Re: [FFmpeg-user] Cutting on video frame

> > > When cutting a video, even when transcoding, I often have a small delay > > between the video and audio. > > After many problems, I started converting my audio to uncompressed > PCM to do cutting, then re-encoding it later (of course this works > for me because I only have stereo audio :-).

Re: [FFmpeg-user] Cutting on video frame

On Jul 7, 2016 13:08, "Christian Ebert" <blacktr...@gmx.net> wrote: > > * Louis Letourneau on Thursday, July 07, 2016 at 12:38:26 -0400 > > When cutting a video, even when transcoding, I often have a small delay > > between the video and audio. > > >

[FFmpeg-user] Cutting on video frame

Hello, I pretty much have the same problem listed in this post in Sept 2015 which got no answer for. http://ffmpeg.org/pipermail/ffmpeg-user/2015-September/028281.html When cutting a video, even when transcoding, I often have a small delay between the video and audio. When looking at the video