Hi guys,
I have add audio echo to a audio stream,
ffmpeg -i input.wav -af "aecho=0.8:0.9:1000:0.3" output.aac
now i want to disable the audio echo from output.aac
can agate disable it? i can not found any example from document.
Thanks
__
To follow-up on my problems,
After a lot of experimenting, I've decided to use Sox for audio capture and
encoding.
The following line does PCM audio capture AND encoding to mp3 using <20%
CPU, so it's much more efficient than Ffmpeg on my Pi Zero.
rec --buffer 200 -c 1 -r 44100 -b 32 /tmp/te
I want to be clear -- I only gave my goal (stitching multiple videos
together) so you'd have context. I'm not asking for help with the
overall task, merely with the concatation problem. I don't mean to
sound ungreatful, and Erik, I've tried to answer all your questions,
even though they seem to be
Hello everyone, i have a question and i hope so someone will help me. I have
stream with different audio tracks and different dvb subtitles, i make embed
derault audio track but i cant make subtitle to be embed on s tream, i must
go right click on vlc go to subtitle and choose subtitle on - off. He
Hi,
Using ffmpeg on armbian system I capture "live" video from underwatter
camera. I stream it to ffserver.
The capture and output stream works. I would like to overlay the
temperature and salinity
into the final output stream before sending to ffserver.
If I output to a file, (mp4 in my test c
>* Executing
*>* ffmpeg -y -i VTS_01_2.VOB -c copy -t 50 VTS_01_2_CUT.VOB
*>>* Leads to this warning
*>* Timestamps are unset in a packet for stream 0. This is deprecated
*>* and will STOP WORKING in the future. Fix your code to set the
*>* timestamps properly
*
This warning should have no relevanc
2017-02-20 2:33 GMT+01:00 John A Hawkinson :
> pb3:test jhawk$ ffmpeg -loop 1 -i f1.png -t 3.933 -pix_fmt yuv420p -r 29.97
> h5.mp4
If you want ntsc framerate, you have to specify -r 3/1001
> So, now I want to concatenate the held frame (3.9 seconds) with the
> video (1.1 seconds). Their
Thanks, Carl Eugen. It looks like -r ntsc is perhaps a more user-friendly
alias and produces the same output as -r 3/1001 (same md5 checksum).
> The "video" was encoded by a hardware encoder, the "held frame" by
> x264, you cannot concatenate them.
When you say "cannot concatenate" do you mea
2017-02-20 12:03 GMT+01:00 Sub Phil :
> Because: "This is deprecated and will STOP WORKING in the future. Fix
> your code to set the timestamps properly"
>
> And I haven't found how to fix it.
The fix has to be made by the ffmpeg developers, not the users.
Please do not break mail threads, Carl
2017-02-19 22:25 GMT+01:00 peter valencic :
> ffmpeg -i rtsp://
> mpv.cdn3.bigCDN.com:554/bigCDN/definst/mp4:bigbuckbunnyiphone_400.mp4 -vf
> drawtext="fontfile=/home/projekt/StreamTest/Roboto-Black.ttf: text='Stack
> Overflow': fontcolor=white: fontsize=36: box=1: boxcolor=black@0.5:
> boxborderw
2017-02-21 1:54 GMT+01:00 John Hawkinson :
>> The "video" was encoded by a hardware encoder, the "held frame" by
>> x264, you cannot concatenate them.
>
> When you say "cannot concatenate" do you mean with "-c copy" or not at all?
Didn't you try without -c copy?
You cannot use the concat demuxer
> >> The "video" was encoded by a hardware encoder, the "held frame" by
> >> x264, you cannot concatenate them.
> > When you say "cannot concatenate" do you mean with "-c copy" or not at all?
> Didn't you try without -c copy?
Yes, I tried both ways, and both produced invalid output. I'm not sure
2012-11-30 2:17 GMT+08:00 Lou Logan :
> On Thu, 29 Nov 2012 14:20:41 +0800, tom wrote:
>
> > when using ffmpeg for live-streaming from audio device in conference env,
> > voice echo happened.
> > Is there an AEC filter for audio input device?
> >
> > best regards
> > Tom
>
> User support questio
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