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
> >> 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
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
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
2017-02-20 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
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 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
>* 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
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
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
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
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
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
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