On 09/11/16 03:11, 若宇星痕 wrote:
Hi, everyone:
I have a list of several videos and i want to stream these files with no
interval,
like watching a playlist of rtmp stream.
I have tried a loop to stream for the list,but when a video stream ended and
stream another file,
the VLC player will be bla
On 05/11/16 12:09, Carl Eugen Hoyos wrote:
This e-mail (and any attachments) is confidential
Please avoid this when sending emails to a public mailing list: Imo,
it makes your company look stupid.
Carl Eugen
I believe what Carl is trying to say is that you may have a problem with one of
yo
l.com
Webpage: http://sites.google.com/site/matteonaccari
From: ffmpeg-user [ffmpeg-user-boun...@ffmpeg.org] on behalf of Sven C. Dack
[sven.c.d...@sky.com]
Sent: 03 November 2016 20:57
To: FFmpeg user questions
Subject: Re: [FFmpeg-user] Specifying lib path when
On 03/11/16 18:34, Matteo Naccari wrote:
Dear FFmpeg users,
I'm trying to build a fork of ffmpeg under Linux (Ubuntu 14.04, gcc 4.82) which
then integrates the codec I'm working on (https://github.com/bbc/turingcodec).
This codec uses some boost libraries which ship with the source code. Howev
On 02/11/16 13:09, Dev Android wrote:
Hi There,
I'm trying to use ffmpeg in my app. I followed following link to
configure ffmpeg on my system but it ends with an error.
http://www.roman10.net/2013/08/18/how-to-build-ffmpeg-with-ndk-r9/
It gives produces error log as
Android/Sdk/ndk-bundle/too
On 01/11/16 02:08, Andrew Sun wrote:
On 10/31/2016 8:34 PM, Phil Rhodes wrote:
I'd have to ask what you would intend using it for; I guess it might be
possible to use some of the open DCP tools to build Atmos-compatible DCPs.
The thing is, any environment capable of mixing it to any standard is
On 27/10/16 01:47, Ronald F. Guilmette wrote:
Is each frame within, say, an MPEG4/AVC video dependent upon -both- the
nearest preceeding reference frame -and- also the other non-reference
preceeding frames ?
Not necessarily, but it can, yes. It can also reference data in succeeding
frames.
ht
On 26/10/16 23:38, Carl Eugen Hoyos wrote:
I do not remember a sample file for which "-r 29.97" would
have been correct.
He hasn't given a sample file and I have given an example.
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On 26/10/16 20:06, Ronald F. Guilmette wrote:
Apologies if this is an FAQ.
I have a video with a fixed frame rate of 59.940 fps. Some of my devices
don't cope with this very well. Thus, I'd like to convert the video to
one with exactly half the frame rate (29.970), but preferably without
doing
On 26/10/16 02:30, chengmo wrote:
Hi All:
Do someone encountered this situation like the attach showed ?
If so ,could you give some tips about it ?
What's the problem could it be ?
A couple of things... "libav" and "ffmpeg" are not the same project. So please
On 20/10/16 19:07, ilker tezcan wrote:
Also, old GPUs doesn't supports playback to videos encoded "10-bit" x264 in
GPU (hardware-acceleration) mode. Therefore the CPU usage increases while the
10-bit videos playing.
___
I think the question as to w
On 19/10/16 12:39, Gabor Alsecz wrote:
Got it, thanks for your hints!
What i really try to achieve here to find a good command line option or a
very similar one i can implement in my code where feeding FFmpeg process's
stdout with raw byte data from code which encodes and stream to Youtube
than.
On 19/10/16 10:46, Gabor Alsecz wrote:
Dear All,
I try to transcode a video with h264_nvenc codec with the following command
(including stdout/pipe, Windows):
ffmpeg -i perspective1440.mp4 -c:v h264_nvenc -profile:v high -vf
format=nv12 -qp 0 -f h264 - > perspective1440_out_nvenc.mp4
The option
On 17/10/16 17:50, Tung Tran wrote:
Dear all
Could you please point me the command to create .m3u8 playlist for
subtitles on HLS streaming (VoD) application. I have the .srt file but
dont know how to make .m3u8 playlist from it.
Thank you
From what I know are .m3u files just plain text files (
On 15/10/16 22:54, Ana B. wrote:
Hello! I am trying to* re-encode MKV files into MP4 *and am getting pretty
desperate. FFMPEG changes my files to MP4 format, with the same quality
intact, but *the file size nearly doubles* with every conversion. (I don't
know if this is helpful, but using convers
On 15/10/16 20:51, tyt xtreme wrote:
Dear All,
I am using the following command to test streaming to youtube but doesn't
show any video or get sound on Youtube's Live Streaming page, however
inform me stream is live, and has good healt. What i am doing wrong?
$ ffmpeg.exe -re -loop 1 -i output_
On 15/10/16 12:49, Bet Scape wrote:
Is it possible to insert text into a video at the exact timestamps?
Assuming video is 10 minutes long and I have over 500 messages to display
for 1 second each and I only have the timestamps of when the messages
should appear.
_
On 13/10/16 14:01, tyt xtreme wrote:
And what can i do on Windows to check these capabilities?
Btw the GPU is a Gainward 6 Gb nVidia GTX 980 Ti so i think this should
support the above formats.
Any idea why this encoding doesn't work?
$ ffmpeg -i perspective.mp4 -c:v h264_nvenc -profile:v high4
On 14/10/16 12:40, tyt xtreme wrote:
I have post renamed the file but i've did the re-encoding again on the
original file like this:
log:
$ ffmpeg -i perspective.mp4 -c:v h264_nvenc -profile:v high -preset:v fast
perspective_out.mp4
ffmpeg version N-81960-g1bda0ee Copyright (c) 2000-2016 the FFm
On 14/10/16 11:53, tyt xtreme wrote:
Thanks for the help and explanation! I can tell the encoding runs now,
tried with the following command:
$ ffmpeg -i perspective.mp4 -c:v h264_nvenc -profile:v high -preset:v fast
perspective_out.mp4
but the output image/video coloring really weird. from a no
On 13/10/16 16:05, Nicolas George wrote:
Le duodi 22 vendémiaire, an CCXXV, Sven C. Dack a écrit :
If I'm not mistaken then yuv444p is linked to 10-bit depth encoding
Not necessarily. ...
Sorry if I wasn't clear enough. I didn't say yuv444p was a 10-bit format. I said
it is
n improve the picture quality a lot especially around I-frames.
On Thu, Oct 13, 2016 at 1:52 PM, Sven C. Dack wrote:
On 13/10/16 11:34, tyt xtreme wrote:
Dear All,
Any idea why this encoding doesn't work?
$ ffmpeg -i perspective.mp4 -c:v h264_nvenc -profile:v high444p
-pixel_format
On 13/10/16 11:34, tyt xtreme wrote:
Dear All,
Any idea why this encoding doesn't work?
$ ffmpeg -i perspective.mp4 -c:v h264_nvenc -profile:v high444p
-pixel_format yuv444p -preset default perspective_out.mp4
...
[h264_nvenc @ 01d84640] No free surfaces
Video encoding failed
Conversio
On 13/10/16 07:56, Alexey Eromenko wrote:
If we agree, we can try to write a solution.
You don't need people to agree with you. You really just need to provide
patches, make sure you don't limit or destroy anybody else's work and be fair to
all.
When you get a No as an answer then demand an
On 12/10/16 21:17, Alexey Eromenko wrote:
In reality, I need a video that is cross-platform. Android, for
example, doesn't like *.mov videos, using the default Samsung Video
Player on Samsung Galaxy S series.
This is why *please please please* allow people to encode videos, that
work everywhere,
On 12/10/16 10:50, Carl Eugen Hoyos wrote:
The file works fine with every software tested so far except QT,
this includes vlc, MPlayer, xine, GStreamer and WMP (which
contrary to what was claimed here all use different demuxers
afaik).
mpv plays it, too.
Why isn't ffmpeg being used to just fix
On 12/10/16 08:31, Thomas Worth wrote:
On Tue, Oct 11, 2016 at 2:19 AM, Sven C. Dack wrote:
On 11/10/16 08:31, Alexey Eromenko wrote:
I have a strong belief, that produced MP4 files should be played on
all popular players, and any potential issues must be documented.
Additionally ffmpeg
On 11/10/16 23:42, Alexey Eromenko wrote:
The important encoders I use myself are libmp3lame, libvpx, libx264,
libx265 and more...
Except for AAC audio codec, everything else uses 3rd party encoders,
but decoders for ffmpeg are built-in, right ?
Why so ? Because encoders improve faster than dec
On 11/10/16 08:31, Alexey Eromenko wrote:
I have a strong belief, that produced MP4 files should be played on
all popular players, and any potential issues must be documented.
Additionally ffmpeg should provide a BIG WARNING that a resulting file
will not be playable on Apple decoders, and offer
On 11/10/16 01:30, Alexey Eromenko wrote:
...
It well may be an Apple bug, but since I can't find anyone at Apple to
fix it, I think fixing it in the encoder is way simpler, and it is the
way to go. Especially because it's open-source and because Apple
players are popular.
So you're saying you
On 10/10/16 23:23, Alexey Eromenko wrote:
Hello all,
Bug #5882; Certain x264 videos do not play on Apple decoders
(Quicktime/iTunes/iPad)
Today was closed by developer "cehoyos" without any explanation, and
without any resolution.
He treats all bugs like that ? Worse yet; he treats all people l
On 09/10/16 22:00, Xen wrote:
... I wish it could be just about the information instead of telling others
what to do and what not to do and all of that.
It's called "biting the hand that feeds you."
You're welcome.
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On 08/10/16 23:24, Xen wrote:
Is there any way in Linux to obtain an accurate frame/time number through a
GUI that can be used with ffmpeg?
I know Avidemux hardly works at all, VLC will not reliably show frames.
Pitivi is not an option, I haven't tried Kdenlive because it crashed the first
ti
On 08/10/16 00:51, Alexey Eromenko wrote:
Downloaded ffmpeg-git + installed all build-dependencies:
The configuration was copied over from Debian. (ffmpeg has too much
external libraries and dependencies to choose one-by-one).
ffmpeg-git configure step:
http://pastebin.com/jYv0RujW
# make
...
imply install the package. For Ubuntu/Debian you do:
$ sudo apt-get install ffmpeg
I'm not a Gentoo user, but you might want to read this for how to install it on
Gentoo:
https://wiki.gentoo.org/wiki/Ffmpeg
On Thu, Oct 6, 2016 at 7:17 PM, Sven C. Dack wrote:
On 06/10/16 13:48, Tech
On 06/10/16 21:25, P. Remek wrote:
Hi,
I have some update regarding my original question: we figured that if
we switch off linux watchdog with "echo 0 > proc/sys/kernel/watchdog"
the multithreaded behaivor and performance of ffmpeg goes back to
normal. We don't know yet why is that because on ou
On 06/10/16 13:48, Tech Developer wrote:
Hi,
i installed ffmpeg for open meetings web conferencing software,
now i able to got .avi,.flv.jpg files from recorded video, but *.ogg,*.mp4
not able to got openmeetings team said that is incompatible ffmpeg i want
complete compatible ffmpeg for cen
On 22/09/16 02:56, Juan O Batista wrote:
Hello Marcelo.
Let my ask you a question.
Last week you send me a solutions for preserve close caption in output mpeg
file, using a53cc 1 parameters, it is working fine.
But the output file is mpeg-4 (part10).
My question is Can I obtain mpeg-1/2 and pre
On 13/09/16 16:56, Carl Eugen Hoyos wrote:
2016-09-10 19:59 GMT+02:00 Juan O Batista :
ffmpeg -i input.mov -i cap.srt -codec:v mpeg2video -b:v 10M -c:a mp2
-b:a 192k -ar 48000 -r 29.97 -timecode 00:01:00:00 -qscale:v 2
-codec:a mp2 -b:a 192k output.mpeg
I had missed this message, sorry.
If you
On 13/09/16 14:09, Steve Boyer wrote:
ffmpeg -i video2008.mp4 -i audio2008.m4a -q 1 -c:v libx264 -preset slower
-s 1920x1080 -map 0:v:0 -map 1:a:0 -y video+audio2008.mp4
Like an adult diaper, it depends. If I'm reading it right, you're going to
be greatly stretching out the Y-axis. Is that wha
On 12/09/16 20:54, Juan O Batista wrote:
Yes Sven but I want .mpeg output file and I need turn off, turn on the subtitle.
Who is subs2.srt, I have only subtitle file is subs2
Then leave away the part with the filter "-vf subtitles=...".
If this doesn't help you then find out what exactly it i
On 12/09/16 18:05, Juan O Batista wrote:
I have .mpeg with close caption I need output .mpeg file but I need too do
drawtext in output file, but preserving close caption
$ ffmpeg -i video.mpeg -i subs1.srt -vf subtitles=subs2.srt -c:a copy -y out.mkv
This takes "video.mpeg" as video input an
help.
Sven
On 12/09/16 17:33, Juan O Batista wrote:
HOW TO PRESERVING CLOSED CAPTION AFTER CONVERTING A VIDEO USING FFMPEG
IT IS POSSIBLE?
THANK YOU
- Original Message -
From: "Sven C. Dack"
To: "FFmpeg user questions"
Sent: Saturday, September 10, 2016 3:
On 10/09/16 20:16, Juan O Batista wrote:
Thank you Sven. What MPEG MPEG transport stream format is better.
Thank you
Anyone that works is good.
I personally prefer the Matroska format ("-f matroska" or .mkv) as its in wide
use these days, very flexible - it can carry a large variety of audi
On 10/09/16 20:04, Andy Furniss wrote:
Sven C. Dack wrote:
For those who haven't followed the developers mailing list; this has
improved with the latest git. One can stream in H.264 and H.265 from
a 1920x1080 desktop with a frame rate well above 60Hz (~100fp/s with
an Nvidia GeForce GT
On 10/09/16 18:59, Juan O Batista wrote:
Thank you. My purpose is obtain a .mpeg file with close caption because some
channel use mpeg extension.
I used mpeg2video but in the video result i can see the close caption
ffmpeg -i input.mov -i cap.srt -codec:v mpeg2video -b:v 10M -c:a mp2 -b:a 192k
On 10/09/16 18:12, Juan O Batista wrote:
Hello everyone.
I need to know if it is possible.
I have a .mov movie I need to convert to .mpeg using ffmpeg
I need output .mpeg with closed captioning.
My question is it is possible using FFMPEg?
Thank you
Hello Juan,
it's very likely possible, but
On 04/09/16 12:57, Andy Furniss wrote:
...
Good to know - I had -r pasted away in my notes.
So in terms of benchmarking it seems to replace -r needs use of vsync 2
- it's horrible without when asking for high fps, but current git does
warn to use it.
For me cpus forced to perf I get -
ffmpeg -
On 09/09/16 09:48, Sven C. Dack wrote:
On 09/09/16 09:15, Rens Dijkshoorn wrote:
Hi,
any plans to include build options to support the BBC turingcodec.
For who are not familiar with the project its an opensource HEVC
compliant codec
Source can be found at
https://github.com/bbc/turingcodec
On 09/09/16 09:15, Rens Dijkshoorn wrote:
Hi,
any plans to include build options to support the BBC turingcodec.
For who are not familiar with the project its an opensource HEVC
compliant codec
Source can be found at
https://github.com/bbc/turingcodec
Rens
Hello Rens,
can you tell what t
On 08/09/16 05:25, Reuben Martin wrote:
On Wednesday, September 7, 2016 11:01:12 PM CDT Sven C. Dack wrote:
Hello Roy,
have you looked at ffserver yet? See it's manpage ffserver(1):
ffserver is junk and is to be removed from the next release IIRC.
... and sometime in the future w
On 07/09/16 22:00, Roy Pardi wrote:
Hi, I am new to the list and also to ffmpeg so this is likely to be a naive
question.
My question concerns the command line version of ffmpeg. I am developing a
cross-platform app in Adobe AIR and the problem I am trying to solve is being
able to seek to a
On 05/09/16 12:44, Reindl Harald wrote:
Am 05.09.2016 um 12:00 schrieb Sven C. Dack:
On 05/09/16 10:21, Peter White wrote:
What now? One LOL and I am not serious? You made the joke.
So you have no real interest in being here. Have it your way. I will put
you on an ignore list. Fine by me
On 05/09/16 10:21, Peter White wrote:
What now? One LOL and I am not serious? You made the joke.
So you have no real interest in being here. Have it your way. I will put you on
an ignore list. Fine by me.
Sven
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On 05/09/16 00:55, Peter White wrote:
...
LOL, never said otherwise.
Actually you did. You have asked "What effects?" If you are not being serious
then why are you on this mailing list?
Sven
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On 04/09/16 22:52, Peter White wrote:
...
So you showed that they have an effect. Acknowledged. My question had
a follow-up, though. Your conclusions are not correct. The best scaler
is the one producing the best visual quality *before* compression. ...
I am glad you could see the effect after
On 04/09/16 22:32, jd1008 wrote:
On 09/04/2016 03:31 PM, jd1008 wrote:
Hi,
I have a video file which is a compilation of different songs.
I know the start offsets of all songs and durations.
How can I use that info to use ffmpeg to break the file into
multiple files, one for each song?
I mea
On 04/09/16 21:13, Peter White wrote:
Hi,
04.09.2016 20:40, Sven C. Dack:
...
> *** Please note that this is _NOT_ a comparison of encoders, but it is
> meant to show the effect of the (down-)scaling filters on reencoding.
> ***
But what effects?
I am not sure how I can help yo
On 02/09/16 17:28, Sven C. Dack wrote:
Hello Peter,
I was not arguing. I was stating what I was doing. Your suggestions are
however welcome.
Sven
I now had the time to follow up on your suggestions, Peter.
There are a few things I need to note first... The Nvidia hardware encoder NVENC
On 04/09/16 11:25, Andy Furniss wrote:
Sven C. Dack wrote:
The first thing you can do is to reduce the frames that get grabbed per
second. try this:
$ ffmpeg -f x11grab -s 1920x1080 -i :0.0 -f rawvideo /dev/null
(I.e. 30fp/s, 2gbit/s)
Seems to default to 30 even if you can go higher.
-f
On 04/09/16 09:56, Marco Diletti wrote:
Hello,
i am trying to encode with a variable bitrate, 2 pass encoding, using
the codec
hevc_nvenv.
ffmpeg -i infile.mkv -vcodec hevc_nvenc -preset slow -qmin 1 -qmax 50
-b:v 4000k -c:a copy -f matroska outfile.mkv
Theorically it shoulds use 2 pass encod
On 04/09/16 09:25, Carl Eugen Hoyos wrote:
2016-09-04 10:16 GMT+02:00 Sven C. Dack :
$ ffmpeg -f x11grab -s 1920x1080 -i :0.0 -f rawvideo /dev/null
(I.e. 30fp/s, 2gbit/s)
This will tell you how fast you can grab at the most. Here the
screen size is set to be 1920x1080.
Then reduce it with the
On 04/09/16 07:46, happysmas...@vmail.me wrote:
I am attempting to screencast using ffmpeg on my PC, but I have one problem:
it uses too much CPU, even using `-crf=0`. Does anyone know how I can reduce
this, either using a REALLY lossy format or using my Radeon RX 480? Even if
it's not that eff
On 03/09/16 23:36, Reuben Martin wrote:
Is it possible to use slice-threads for the filter graph, while using strictly
frame-threads for the encdoing? In my case it would be sliced threads for
yadif, and then frame threads for libx264.
You can specify the number of threads for each stream at eve
Hello Peter,
I was not arguing. I was stating what I was doing. Your suggestions are however
welcome.
Sven
On 02/09/16 12:29, Peter White wrote:
02.09.2016, 08:50, Sven C. Dack:
> Hello,
>
> On the subject... I've been doing just that. Transcoding H.264
> videos in
Hello,
it seems my first e-mail got lost, which is why I am writing a second one. If
there is an issue with the moderation then please apologize for the duplicate...
On the subject... I've been doing just that. Transcoding H.264 videos into
H.265, scaling these down to 480p and reducing the b
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