[FFmpeg-user] Can I stream videos using HLS without making playlist?

[USMAN AAMER]

Hi,
I am streaming videos over LAN using ffmpeg HLS streaming.
Can I stream videos (like RTP) directly to the clients without creating
playlist?


Thanks.
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Re: [FFmpeg-user] Converting text to video for dictation

[Michael Koch]

Am 20.10.2020 um 06:46 schrieb John B Morris:

Hello all,

typography effects based video
So that one is basically what I'm looking to do with ffmpeg - turn a
subtitle file (of any type) into a transparent backgrounded (?) video for
use in my video editor to combine the necessary contents together - or some
other file/method that has/involves time stamps/tags or "keyframes". Since
I don't intend to use my voice in my videos, I "voice" them via text
elements either in the center of the screen or some other places where it
makes sense to do so. (I do this with my current video editor already, but
it isn't very efficient, time and complexity wise, especially for videos
that heavily rely on this... so hopefully ffmpeg can help with that?) Also
if possible (not needed), font and color changing, and maybe some movement.

Maybe subtitles in the future, but I sort of already know how to do those,
however the first point would be good to know.


I don't yet understand why you want to create a video with transparent 
background. I think that can be done, but I don't have an example ready.
It seems easier to write the texts/subtitles directly into the final 
video. You find a few examples in chapters 2.118 and 2.119 of my book:  
http://www.astro-electronic.de/FFmpeg_Book.pdf


Michael

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Re: [FFmpeg-user] Converting text to video for dictation

[andrei ka]

guess you should first check a bunch of subtitling programs. from you
description, you're simply doing subtiting of your vids. text placement is
easier done by specialised subtitlers,
and once you're done, you can burn 'em with ffmpeg (the only reasonable
usage of ffmpeg i can image for what you're doing, the rest of it is not
really ffmpeg's specialisation)..
if you're new to free subtitlers google aegisub & likes

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Re: [FFmpeg-user] Can I stream videos using HLS without making playlist?

[andrei ka]

google 'ffmpeg multicast' or 'vlc multicast'. oh, fun stuff, today you can
broadcast your videos on lan via rabbitmq as well :-P

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Re: [FFmpeg-user] Converting text to video for dictation

[Edward Park]

Hi,

>> typography effects based video
> So that one is basically what I'm looking to do with ffmpeg - turn a
> subtitle file (of any type) into a transparent backgrounded (?) video for
> use in my video editor to combine the necessary contents together - or some
> other file/method that has/involves time stamps/tags or "keyframes".

Well I’ll be honest I thought that was pretty unlikely when I threw that in the 
mix. 

> Since I don't intend to use my voice in my videos, I "voice" them via text
> elements either in the center of the screen or some other places where it
> makes sense to do so. (I do this with my current video editor already, but
> it isn't very efficient, time and complexity wise, especially for videos
> that heavily rely on this... so hopefully ffmpeg can help with that?) Also
> if possible (not needed), font and color changing, and maybe some movement.

So just to be clear, you’re referring to kinetic typography, right?
For example stuff like Pulp Fiction: Intonation , 
derivative graphics work by Jarett Moody (slightly NSFW, language)
Apple has also been playing around with the style since 2016, mostly in promo 
campaigns for non-traditional channels. Don’t Blink 


You say it’s not very efficient using your video editor (I assume something 
along the lines of Avid, PPro, FCPX/Motion), but I don’t think FFmpeg is the 
right tool for the job, unless you had some really complex ass subtitles 
already, using a bunch of v4+ features of the script and you just need to burn 
it into the video.

> Maybe subtitles in the future, but I sort of already know how to do those,
> however the first point would be good to know.

I think you want subtitles with heavy custom styling, maybe as opposed to 
captions like you would do in scenarist, try Aegisub  
with newer ASS versions.

Regards,
Ted Park

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[FFmpeg-user] dpx 16bit files to ffv1 problem with the frammd5 sum

[boecki]

Hello,
I have some problems to encode a file from a dpx 16bit sequence to ffv1 and
create a proper framemd5 checksum.
The problem is like this, that the checksum from the file is different to
the checksum of the dpx frames.
My video has only 1 sec of the same pictures.

First I create the ffv1 like this:
ffmpeg -f image2 -framerate 24 -i
\\ExaSan\dpx\Testbild_16bit\testbild_%06d.dpx -vcodec ffv1 -level 3 -g 1
-slices 16 -slicecrc 1 -context 1 d:\videos\testbild_16bit.mkv

The checksum from the mkv is create as follows
ffmpeg -i d:\videos\testbild_16bit.mkv -vsync drop -f framemd5
d:\Videos\\testbild_16bit_mkv_framemd5

The checksum from the Image sequence is create as follows
ffmpeg -f image2 -framerate 24 -i
\\ExaSan\dpx\Testbild_16bit\testbild_%06d.dpx -vsync drop -f framemd5
d:\Videos\testbild_16bit_dpx_framemd5

The result of the frammd5 is as follows:
For the mkv file 
#format: frame checksums
#version: 2
#hash: MD5
#software: Lavf58.62.100
#tb 0: 1/24
#media_type 0: video
#codec_id 0: rawvideo
#dimensions 0: 2048x1536
#sar 0: 1/1
#stream#, dts,pts, duration, size, hash
0,  0,  0,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0,  1,  1,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0,  2,  2,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0,  3,  3,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0,  4,  4,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0,  5,  5,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0,  6,  6,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0,  7,  7,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0,  8,  8,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0,  9,  9,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 10, 10,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 11, 11,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 12, 12,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 13, 13,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 14, 14,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 15, 15,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 16, 16,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 17, 17,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 18, 18,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 19, 19,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 20, 20,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 21, 21,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 22, 22,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e
0, 23, 23,1, 18874368,
1433afb7948e09dab21fde3b3d734c7e

And for the dpx file:
#format: frame checksums
#version: 2
#hash: MD5
#software: Lavf58.62.100
#tb 0: 1/24
#media_type 0: video
#codec_id 0: rawvideo
#dimensions 0: 2048x1536
#sar 0: 0/1
#stream#, dts,pts, duration, size, hash
0,  0,  0,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0,  1,  1,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0,  2,  2,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0,  3,  3,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0,  4,  4,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0,  5,  5,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0,  6,  6,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0,  7,  7,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0,  8,  8,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0,  9,  9,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 10, 10,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 11, 11,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 12, 12,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 13, 13,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 14, 14,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 15, 15,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 16, 16,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 17, 17,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 18, 18,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 19, 19,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 20, 20,1, 18874368,
5c591bbd7f656cdae0e0495ae34cf830
0, 21, 21,1, 18874368,

Re: [FFmpeg-user] dpx 16bit files to ffv1 problem with the frammd5 sum

[Jerome Martinez]

On 20/10/2020 12:51, boecki wrote:

Hello,
I have some problems to encode a file from a dpx 16bit sequence to ffv1 and
create a proper framemd5 checksum.
The problem is like this, that the checksum from the file is different to
the checksum of the dpx frames.


framemd5 depends on FFmpeg selected pix_fmt for the output, and DPX 
16-bit default pix_fmt is rgb48 (rgb48le or rgb48be depending on the DPX 
endianess) vs FFV1 16-bit default pix_fmt is gbrp16le.
You need to force your framemd5 analysis to a common pix_fmt, add " 
-pix_fmt gbrp16le" for the DPX framemd5 or " -pix_fmt rgb48le" (or " 
-pix_fmt rgb48be" depending on the source DPX endianess) for the FFV1 
framemd5, and you'll find the same results (I tested on a DPX 16-bit BE 
converted to FFV1 and I get the same framemd5 whatever the pix_fmt 
selected for the final comparison, i.e. in both cases you lose no frame 
content).

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Re: [FFmpeg-user] ffmpeg does nothing but using CPU

[Carl Zwanzig]

On 10/20/2020 10:33 AM, Cecil Westerhof wrote:

What could be happening here?


Please post some more info, at the least the complete command and the output 
of the last invocation in by the script.


Later,

z!
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Re: [FFmpeg-user] ffmpeg does nothing but using CPU

[Cecil Westerhof]

Moritz Barsnick  writes:

> On Tue, Oct 20, 2020 at 19:33:05 +0200, Cecil Westerhof wrote:
>> When looking into the log-file I see it ends with:
>> Enter command: |all |-1 [ ]
>>
>> What could be happening here?
>
> This looks like something from stdin triggered interactive mode.
>
> On Tue, Oct 20, 2020 at 20:38:03 +0200, Cecil Westerhof wrote:
>> The command I use in the bash script is:
>> nice -n 10 ionice -c3   \
>>  ffmpeg -y  \
>> -i  "${inputfile}"  \
>> -vf scale=${xDimension}:-2  \
>> -crf28  \
>> -acodec libmp3lame  \
>> -qscale:a   9   \
>> -preset veryfast\
>> "${outputfile}" 2>"${logfile}"
>
> If you add the option "-nostdin", this mode cannot be triggered. Do try
> that. (You can then no longer interactively quit ffmpeg, of course.)

I will add that. It is in a batch, so I do not need the interactivity.
;-)

Does it matter where I put it? (I am thinking between -i and -vf.)

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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[FFmpeg-user] ffmpeg does nothing but using CPU

[Cecil Westerhof]

I have a bash script that I use to convert a series of files with
ffmpeg. I use 2> to send the output to a log-file.

On a certain file it was working way to long. With ls I saw that the
output-file and the log-file did not change for the past 2½ hours. But
at the same time ffmpeg still uses more as 90% CPU.
When looking into the log-file I see it ends with:
Enter command: |all |-1 [ ]

What could be happening here?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Re: [FFmpeg-user] Converting text to video for dictation

[Carl Zwanzig]

On 10/20/2020 6:52 AM, Edward Park wrote:

You say it’s not very efficient using your video editor (I assume
something along the lines of Avid, PPro, FCPX/Motion), but I don’t think
FFmpeg is the right tool for the job, unless you had some really complex
ass subtitles already, using a bunch of v4+ features of the script and
you just need to burn it into the video.


This kinda sounds like something you'd with Adobe After Effects.

z!
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Re: [FFmpeg-user] ffmpeg does nothing but using CPU

[Cecil Westerhof]

Carl Zwanzig  writes:

> On 10/20/2020 10:33 AM, Cecil Westerhof wrote:
>> What could be happening here?
>
> Please post some more info, at the least the complete command and the
> output of the last invocation in by the script.

The command I use in the bash script is:
nice -n 10 ionice -c3   \
 ffmpeg -y  \
-i  "${inputfile}"  \
-vf scale=${xDimension}:-2  \
-crf28  \
-acodec libmp3lame  \
-qscale:a   9   \
-preset veryfast\
"${outputfile}" 2>"${logfile}"

The value of xDimension was in this case 720.

I am using ffmpeg version 4.1.6 on Debian 10.

The log-file starts with:
ffmpeg version 4.1.6-1~deb10u1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --prefix=/usr --extra-version='1~deb10u1' 
--toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu 
--incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl 
--disable-stripping --enable-avresample --disable-filter=resample 
--enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom 
--enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca 
--enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig 
--enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm 
--enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg 
--enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg 
--enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr 
--enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame 
--enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack 
--enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid 
--enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal 
--enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm 
--enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 
--enable-shared
  libavutil  56. 22.100 / 56. 22.100
  libavcodec 58. 35.100 / 58. 35.100
  libavformat58. 20.100 / 58. 20.100
  libavdevice58.  5.100 / 58.  5.100
  libavfilter 7. 40.101 /  7. 40.101
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale  5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc55.  3.100 / 55.  3.100

Everything looks fine to me until the following:
frame=28999 fps= 26 q=34.0 size=   33024kB time=00:16:06.40 bitrate= 
279.9kbits/s speed=0.855x
frame=29003 fps= 26 q=34.0 size=   33024kB time=00:16:06.40 bitrate= 
279.9kbits/s speed=0.854x
frame=29010 fps= 26 q=34.0 size=   33024kB time=00:16:06.40 bitrate= 
279.9kbits/s speed=0.853x
frame=29016 fps= 26 q=34.0 size=   33024kB time=00:16:06.87 bitrate= 
279.8kbits/s speed=0.853x
frame=29022 fps= 26 q=34.0 size=   33024kB time=00:16:06.87 bitrate= 
279.8kbits/s speed=0.853x


Then there is quit a lot like this:
stream #0:
  keyframe=0
  duration=0.033
  dts=968.033  pts=968.067
  size=3318
[h264 @ 0x562755f52ac0] nal_unit_type: 1(Coded slice of a non-IDR picture), 
nal_ref_idc: 2
[libx264 @ 0x562755f46600] frame=29022 QP=29.87 NAL=0 Slice:B Poc:12  I:0   
 P:91   SKIP:1079 size=160 bytes
stream #1:
  keyframe=1
  duration=0.023
  dts=967.599  pts=967.599
  size=347
stream #1:
  keyframe=1
  duration=0.023
  dts=967.622  pts=967.622
  size=359

And it ends with this:
[h264 @ 0x562755f487c0] nal_unit_type: 1(Coded slice of a non-IDR picture), 
nal_ref_idc: 2
[libx264 @ 0x562755f46600] frame=29131 QP=34.84 NAL=2 Slice:B Poc:4   I:29  
 P:345  SKIP:782  size=1179 bytes
stream #0:
  keyframe=0
  duration=0.033
  dts=971.700  pts=971.700
  size=197
[h264 @ 0x562755f5c3c0] nal_unit_type: 1(Coded slice of a non-IDR picture), 
nal_ref_idc: 0
[libx264 @ 0x562755f46600] frame=29132 QP=35.33 NAL=0 Slice:B Poc:6   I:8   
 P:264  SKIP:892  size=722 bytes

Enter command: |all |-1 [ ]

From this moment on ffmpeg does nothing but using CPU cycles.


One interesting part: I had earlier the same problem with another
file. After cancelling and starting again, it was processed without a
problem.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Re: [FFmpeg-user] dpx 16bit files to ffv1 problem with the frammd5 sum

[Kieran O Leary]

I agree with Jerome, I’ve also found this and it’s a pix_fmt issue. This is
a good example of why you should post the complete uncut terminal output as
that would have told us the pix_fmt when you run both jobs.

Best,

Kieran O’Leary
National Library of Ireland
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Re: [FFmpeg-user] ffmpeg does nothing but using CPU

[Moritz Barsnick]

On Tue, Oct 20, 2020 at 19:33:05 +0200, Cecil Westerhof wrote:
> When looking into the log-file I see it ends with:
> Enter command: |all |-1 [ ]
>
> What could be happening here?

This looks like something from stdin triggered interactive mode.

On Tue, Oct 20, 2020 at 20:38:03 +0200, Cecil Westerhof wrote:
> The command I use in the bash script is:
> nice -n 10 ionice -c3   \
>  ffmpeg -y  \
> -i  "${inputfile}"  \
> -vf scale=${xDimension}:-2  \
> -crf28  \
> -acodec libmp3lame  \
> -qscale:a   9   \
> -preset veryfast\
> "${outputfile}" 2>"${logfile}"

If you add the option "-nostdin", this mode cannot be triggered. Do try
that. (You can then no longer interactively quit ffmpeg, of course.)

Cheers,
Moritz
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Re: [FFmpeg-user] ERROR: srt >= 1.3.0 not found using pkg-config

[rhannah]

Yes, I see what you mean, I just went to the end of that log file to see why it 
crashed but there are a lot of other problems earlier on, get a similar result 
just when I run 
sudo ./configure

I guess it may be peculiar to the Pi, unfortunately I don't have another linux 
machine to try it on at the moment, 

Looks like the first lot of errors are around not knowing what the processor 
is, do you have any idea what the define should be? Currently trying to get it 
working on a Pi 3 B+

I may try and install an Ubuntu operating system on the device and see if I 
have more fortune

Robyn 



-Original Message-
From: ffmpeg-user  On Behalf Of Edward Park
Sent: Wednesday, 21 October 2020 1:17 PM
To: FFmpeg user questions 
Subject: Re: [FFmpeg-user] ERROR: srt >= 1.3.0 not found using pkg-config

Hi,

> I can't get past the error ERROR: srt >= 1.3.0 not found using 
> pkg-config
> 
> 
> 
> Has  anyone found where it is coming from?? Log file attached but 
> it does not seem to add anything to the party

That’s not the only problem, can you run configure at all, with no options?

Regards,
Ted Park

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Re: [FFmpeg-user] ERROR: srt >= 1.3.0 not found using pkg-config

[Edward Park]

Hi,

> I can't get past the error ERROR: srt >= 1.3.0 not found using pkg-config
> 
> 
> 
> Has  anyone found where it is coming from?? Log file attached but it
> does not seem to add anything to the party

That’s not the only problem, can you run configure at all, with no options?

Regards,
Ted Park

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Re: [FFmpeg-user] ffmpeg does nothing but using CPU

[Reindl Harald]

Am 20.10.20 um 20:38 schrieb Cecil Westerhof:

 Enter command: |all |-1 [ ]

 From this moment on ffmpeg does nothing but using CPU cycles


and you don't realize that it waits for input?

just remove the redirection and look how to avoid that situation
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