[FFmpeg-user] RTSP Camera stream and 1 audio stream / Non-monotonous DTS errors

[robert]

I have a single camera video and audio stream as input 0
Stream 0:0 Video
Stream 0:1 Audio

I am bringing in ADDITIONAL audio from a separate url as input 1
Stream 1:0 Audio

These are the errors I receive in the log file with some hesitation on
youtube live

[libmp3lame @ 0x29840c0] Queue input is backward in time
[flv @ 0x29780c0] Non-monotonous DTS in output stream 0:1; previous:
24779, current: 24776; changing to 24779. This may result in incorrect
timestamps in the output file.

I am running a recent copy of ffmpeg but get the error with the Ubuntu
distributed version too.

ffmpeg version N-90813-g4ac0ff8 Copyright (c) 2000-2018 the FFmpeg
developers built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609

ffmpeg -rtsp_transport tcp -i "rtsp://camip/url" -i "http://audioip:;
-vcodec libx264 -b:a 128k -b:v 3072k -pix_fmt yuv420p -preset medium -r 30
-g 60 -acodec libmp3lame -ar 44100 -threads 6 -b:a 128k -filter_complex
"amix=inputs=2:duration=first:dropout_transition=2" -strict experimental
-f flv "rtmp://a.rtmp.youtube.com/live2/---"

My guess is I am mixing the two audio channels wrong?  What I would really
like is...

Video from Stream 0:0, Audio from Stream 0:1 and mix in Audio from Steam 1:0

Both audio sources are mono.  Mixing them together is the way it is done
now but I would also be interested to know how to say...

Stream 0:1 Left channel Stream 1:0 Right channel.  Probably wont use it
that way but interested in knowing how to do it.

Is there a way to simply drop audio packets instead of receiving the above
errors or am I possibly receiving those errors because I am mixing instead
of merging or some other method?

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Re: [FFmpeg-user] Error: librtmp not found using pkg-config

[Reindl Harald]

Am 20.05.2018 um 22:14 schrieb Ken's CCCOMM Email:
> Please help me understand why I got this error when Downloading & compiling
> FFMPEG (Latest Version). 

--enable-librtmp

remove it or install the devel-package

> I'm new to this so I don't know how to "Include the log file
> "ffbuild/config.log"

well, you where asked to attach that file from the buildfolder

also don't attach office documents for just paste plaintext
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[FFmpeg-user] Error: librtmp not found using pkg-config

[Ken's CCCOMM Email]

Please help me understand why I got this error when Downloading & compiling
FFMPEG (Latest Version). 

I'm new to this so I don't know how to "Include the log file
"ffbuild/config.log"". Please advise if you need this and how I can get it
for you. Thank you in advance.

 

 

Ken Thomas



Error.odt
Description: application/vnd.oasis.opendocument.text
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[FFmpeg-user] ffmpeg and two (2) logitech 920 webcams

[Brenda Spinner]

I am using the following line to preview my webcam:

ffmpeg -s 1280x720 -framerate 30 -pix_fmt yuv420p -rtbufsize 100MB -f dshow
-i video="Logitech Cam#1" -c:v copy -an -f sdl "WebCAM Preview"

this line works fine with cam #1, however when try it with cam #2, I get
the error:

[dshow @ 002d8920] Could not set video options video=Logitech
Cam#2: I/O error

Can anyone tell me why this is happening. I would like to able to preview
both webcams at the same time?

Thanks, Frank


Virus-free.
www.avast.com

<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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Re: [FFmpeg-user] H265 conversion hardware ?

[Gabriel Zachmann]

Thanks a lot for the link - unfortunately , this is outside my budget.

Best regards, Gabriel


> 
> 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 of this is ffmpeg related though)
> 
> I hope this helps.
> 
> Louis

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Re: [FFmpeg-user] ffplay doesn't decode hevc correctly

[mohammed bey ahmed khernache]

>  Does it get better over time or worse?
no change over the time. The same decoding process quality (bad) until the
end of the video.
> Is there a reason why you used "-threads 8" in your ffplay command line
but not the ffmpeg command line?
I am using multi-core processor.
I don't know, I followed the reply of  Moritz Barsnick.

Thank you.


​
___

Mohammed BEY AHMED KHERNACHE
PhD student at Lab-STICC
  Université Bretagne Sud, Lorient, France
 mohammed.bey-ahmed-kherna...@univ-ubs.fr

 mohbeyi...@gmail.com

___

On Sun, May 20, 2018 at 8:20 PM, Carl Eugen Hoyos 
wrote:

> 2018-05-20 19:01 GMT+02:00, mohammed bey ahmed khernache <
> mohbeyi...@gmail.com>:
>
> >   20.48 A-V:  2.591 fd= 383 aq=0KB vq=0KB sq=0B f=0/0
>
> This indicates no frames were dropped but video does indeed lag audio.
>
> Does it get better over time or worse?
>
> > frame=  291 fps= 80 q=-0.0 size=N/A time=00:00:12.01 bitrate=N/A speed=
> > 3.3x
>
> This indicates that decoding with 3x real time is possible.
>
> Is there a reason why you used "-threads 8" in your ffplay
> command line but not the ffmpeg command line? Please
> remove it unless you know exactly why.
>
> Please remember not to top-post here, Carl Eugen
> ___
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Re: [FFmpeg-user] ffplay doesn't decode hevc correctly

[Carl Eugen Hoyos]

2018-05-20 19:01 GMT+02:00, mohammed bey ahmed khernache :

>   20.48 A-V:  2.591 fd= 383 aq=0KB vq=0KB sq=0B f=0/0

This indicates no frames were dropped but video does indeed lag audio.

Does it get better over time or worse?

> frame=  291 fps= 80 q=-0.0 size=N/A time=00:00:12.01 bitrate=N/A speed=
> 3.3x

This indicates that decoding with 3x real time is possible.

Is there a reason why you used "-threads 8" in your ffplay
command line but not the ffmpeg command line? Please
remove it unless you know exactly why.

Please remember not to top-post here, Carl Eugen
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Re: [FFmpeg-user] ffplay doesn't decode hevc correctly

[mohammed bey ahmed khernache]

Thank you for your quick reply.
The output of the command line "ffplay -threads 8 " is:

root@odroid:~/bin# ./ffplay -threads 8 ../video-h265.mkv
ffplay version N-9-g380ca1bc Copyright (c) 2003-2018 the FFmpeg
developers
  built with gcc 4.8 (Ubuntu/Linaro 4.8.2-19ubuntu1)
  configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static
--extra-cflags=-I/root/ffmpeg_build/include
--extra-ldflags=-L/root/ffmpeg_build/lib --extra-libs='-lpthread -lm'
--bindir=/root/bin --enable-gpl --enable-libass --enable-libfdk-aac
--enable-libfreetype --enable-libmp3lame --enable-libopus
--enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264
--enable-libx265 --arch=arm --arch=arm --enable-neon --enable-thumb
--enable-optimizations --enable-pthreads --enable-gray --enable-version3
--enable-postproc --enable-libxcb --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libdc1394 --enable-libgsm
--enable-libopenjpeg --enable-libspeex --enable-libtheora
--enable-libvorbis --enable-libxvid --enable-yasm --enable-nonfree
  libavutil  56. 18.102 / 56. 18.102
  libavcodec 58. 19.102 / 58. 19.102
  libavformat58. 13.102 / 58. 13.102
  libavdevice58.  4.100 / 58.  4.100
  libavfilter 7. 23.100 /  7. 23.100
  libswscale  5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc55.  2.100 / 55.  2.100
libGL error: MESA-LOADER: malformed or no PCI ID
libGL error: dlopen /usr/lib/arm-linux-gnueabihf/dri/exynos_dri.so failed
(/usr/lib/arm-linux-gnueabihf/dri/exynos_dri.so: cannot open shared object
file: No such file or directory)
libGL error: dlopen ${ORIGIN}/dri/exynos_dri.so failed
(${ORIGIN}/dri/exynos_dri.so: cannot open shared object file: No such file
or directory)
libGL error: dlopen /usr/lib/dri/exynos_dri.so failed
(/usr/lib/dri/exynos_dri.so: cannot open shared object file: No such file
or directory)
libGL error: unable to load driver: exynos_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: exynos
Input #0, matroska,webm, from '../video-h265.mkv':sq=0B f=0/0
  Metadata:
ENCODER : Lavf55.12.0
  Duration: 00:00:16.16, start: 0.099000, bitrate: 2619 kb/s
Stream #0:0: Video: hevc (Main), yuv420p(tv, bt709), 1920x960 [SAR 1:1
DAR 2:1], 25 fps, 25 tbr, 1k tbn, 25 tbc (default)
Stream #0:1(eng): Audio: aac (LC), 48000 Hz, stereo, fltp (default)
Metadata:
  title   : Stereo
  LANGUAGE: eng
  20.48 A-V:  2.591 fd= 383 aq=0KB vq=0KB sq=0B f=0/0



The output of the command line "  ffmpeg -i  -t 30 -f null - "
is:


root@odroid:~/bin# ./ffmpeg -i ../video-h265.mkv -t 30 -f null -
ffmpeg version N-9-g380ca1bc Copyright (c) 2000-2018 the FFmpeg
developers
  built with gcc 4.8 (Ubuntu/Linaro 4.8.2-19ubuntu1)
  configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static
--extra-cflags=-I/root/ffmpeg_build/include
--extra-ldflags=-L/root/ffmpeg_build/lib --extra-libs='-lpthread -lm'
--bindir=/root/bin --enable-gpl --enable-libass --enable-libfdk-aac
--enable-libfreetype --enable-libmp3lame --enable-libopus
--enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264
--enable-libx265 --arch=arm --arch=arm --enable-neon --enable-thumb
--enable-optimizations --enable-pthreads --enable-gray --enable-version3
--enable-postproc --enable-libxcb --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libdc1394 --enable-libgsm
--enable-libopenjpeg --enable-libspeex --enable-libtheora
--enable-libvorbis --enable-libxvid --enable-yasm --enable-nonfree
  libavutil  56. 18.102 / 56. 18.102
  libavcodec 58. 19.102 / 58. 19.102
  libavformat58. 13.102 / 58. 13.102
  libavdevice58.  4.100 / 58.  4.100
  libavfilter 7. 23.100 /  7. 23.100
  libswscale  5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc55.  2.100 / 55.  2.100
Input #0, matroska,webm, from '../video-h265.mkv':
  Metadata:
ENCODER : Lavf55.12.0
  Duration: 00:00:16.16, start: 0.099000, bitrate: 2619 kb/s
Stream #0:0: Video: hevc (Main), yuv420p(tv, bt709), 1920x960 [SAR 1:1
DAR 2:1], 25 fps, 25 tbr, 1k tbn, 25 tbc (default)
Stream #0:1(eng): Audio: aac (LC), 48000 Hz, stereo, fltp (default)
Metadata:
  title   : Stereo
  LANGUAGE: eng
Stream mapping:
  Stream #0:0 -> #0:0 (hevc (native) -> wrapped_avframe (native))
  Stream #0:1 -> #0:1 (aac (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, null, to 'pipe:':
  

[FFmpeg-user] Non-monotonous DTS in output stream 0:0

[Thomas Schmiedl]

Hello,

I try to re-stream from DASH to HLS (read the HLS-stream by 
xupnpd2-Mediaserver and transfer to TV).


ffmpeg version: N-91067-g1c2e5fc454

ffmpeg command: ffmpeg -i 
https://live.idnes.cz/slow/slowtv6_720p/manifest.mpd -c copy -f hls 
-hls_flags delete_segments  -hls_segment_filename 
"/home/user/file%03d.ts" /home/user/stream.m3u8


Sometimes there is such ffmpeg output:
[dash @ 0xd15b40] DTS 8430351390 < 8431247790 out of order
[hls @ 0xd3db80] Non-monotonous DTS in output stream 0:0; previous: 
7198740, current: 6302340; changing to 7198741. This may result in 
incorrect timestamps in the output file.
[hls @ 0xd3db80] Non-monotonous DTS in output stream 0:0; previous: 
7198741, current: 6305940; changing to 7198742. This may result in 
incorrect timestamps in the output file.
[hls @ 0xd3db80] Non-monotonous DTS in output stream 0:0; previous: 
7198742, current: 6309540; changing to 7198743. This may result in 
incorrect timestamps in the output file.
[hls @ 0xd3db80] Non-monotonous DTS in output stream 0:0; previous: 
7198743, current: 6313140; changing to 7198744. This may result in 
incorrect timestamps in the output file.


Thanks for your help.

Thomas
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Re: [FFmpeg-user] ffplay doesn't decode hevc correctly

[Moritz Barsnick]

On Sun, May 20, 2018 at 16:32:05 +0200, mohammed bey ahmed khernache wrote:
> 2) how can decode *hevc *content ?
> I compiled ffmpeg with libx265.

libx265 isn't used for decoding, only for encoding.

> When I try to play back a video encoded
> with hevc, I can not decode it correctly, i.e. ffplay plays it very slowly
> as I don't see all the frames.

I can only guess your computer is too slow. Can you show us the
complete console output of your ffplay command?

> ffplay -threads 8 

Additionally, can you show us the complete output of
$ ffmpeg -i  -t 30 -f null -

Moritz
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[FFmpeg-user] ffplay doesn't decode hevc correctly

[mohammed bey ahmed khernache]

Hello,
I am using *ffplay *to play back a video.
​1) how can I get the details of decoding (fps, miss rate, time, etc)
2) how can decode *hevc *content ?
I compiled ffmpeg with libx265​. When I try to play back a video encoded
with hevc, I can not decode it correctly, i.e. ffplay plays it very slowly
as I don't see all the frames.
I am using this command:
ffplay -threads 8 

Thank you in advance
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Re: [FFmpeg-user] bananapi cedrus h264 hardware encoder yields 0-byte size file

[Carl Eugen Hoyos]

2018-05-18 14:58 GMT+02:00, cedric.dew...@telfort.nl :

> When I add -ts abs to my ffmpeg commandline, the resulting file
> plays in real-time on VLC on my PC.

(So it works fine?)

> It looks like each time the message about non-monotonous DTS
> comes up in the console, the corresponing video frame is dropped.

Your console output does not indicate any dropped frames, feel free
to provide the mjpeg output file.

Carl Eugen
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Re: [FFmpeg-user] How to extract core DTS / DCA stream from a DTS 96/24 stream without re-encoding

[Carl Eugen Hoyos]

2018-05-19 15:05 GMT+02:00, Moritz Barsnick :
> On Sat, May 19, 2018 at 13:59:03 +0100, Onetel wrote:
>> Thanks - I tried this but it seems to re-encode rather than copy, taking
>> much longer than “-acodec copy” (which is instantaneous). I tried:
>>
>> ffmpeg -i in.dts -bsf:a dca_core -strict -2 out.dts
>
> You need to use both "-c:a copy" *and* "-bsf:a dca_core".

The filter does not yet work for 96/24 while -core_only works fine,
you can (for example) test with the following lines (using the file
you found):
$ ffmpeg -i sample.dts -f crc -
$ ffmpeg -core_only 1 -i sample.dts -f crc -
$ ffmpeg -i sample.dts -acodec copy -bsf:a dca_core out.dts
$ md5sum out.dts sample.dts

Carl Eugen
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