Re: [FFmpeg-user] Unable to execute FFMPEG command

[Moritz Barsnick]

Hi Ravi,

On Wed, May 16, 2018 at 11:44:06 +0530, Ravi Kumar wrote:
> After trying above command with different scenarios we are getting 
> following errors.
[...]
> #2)Unrecognized option 
> 'filter_complex\[0]scale=512:-2,pad=512:768:(ow-iw)/2:(oh-ih)/2[vs0],color=black:size=512x768:duration=2.716[b0],[b0][vs0]concat[r0c0];\[1]scale=512:-2,pa=512:768:(ow-iw)/2:(oh-ih)/2[vs1],color=black:size=512x768:duration=0[b1],[b1][vs1]concat[r0c1];\[r0c0][r0c1]hstack=inputs=2[video];\[2]aresample=async=1,adelay=2743.0|2743.0[a0];[3]aresample=async=1,adelay=5.0|5.0[a1];\[a0][a1]amix=inputs=2[audio]-map[video]-map[audio]-acodec'.
> Error splitting the argument list: Option not found

This shows that the shell is not passing your command line to ffmpeg
properly. Is it being run in an interactive shell? Please remove all
line breaks, backslashes, and so on.

For example, what you quoted:
> ffmpeg -i /var/www/html/swipr/uploads/test/video1.mkv -i 
> /var/www/html/swipr/uploads/test/video2.mkv -acodec libopus -i 
> /var/www/html/swipr/uploads/test/audio1.mka -acodec libopus -i 
> /var/www/html/swipr/uploads/test/audio2.mka -y -filter_complex " 
> [0]scale=512:-2,pad=512:768:(ow-iw)/2:(oh-ih)/2[vs0],color=black:size=512x768:duration=2.716[b0],[b0][vs0]concat[r0c0];\[1]scale=512:-2,pa=512:768:(ow-iw)/2:(oh-ih)/2[vs1],color=black:size=512x768:duration=0[b1],[b1][vs1]concat[r0c1];\[r0c0][r0c1]hstack=inputs=2[video];\[2]aresample=async=1,adelay=2743.0|2743.0[a0];[3]aresample=async=1,adelay=5.0|5.0[a1];\[a0][a1]amix=inputs=2[audio]"
>  
> -map[video] \ -map[audio] \ -acodec libopus \ -vcodec libvpx \ output.webm

- Did you break these lines or did your mailer?
- Why are there backslashes in the middle of the command, near
 "-vcodec" and "-acodec" (or did your mailer merge several lines)?
- Why this backslash and the others in the middle of the filter
  expression?: "...concat[r0c0];\[1]scale=512:-2..."

Further comments:
- "-map[audio]" should be "-map '[audio]'" (there needs to be a space
  inbetween, and safer to quote shell arguments with brackets, though
  not necessarily required). Same for "-map[video]".
- You are using too few semicolons instead of commas. Before "color"
  comes a semicolon, and before "[b0][vs0]concat" comes a semicolon
  (else these filter chains get connected).

Cheers,
Moritz
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[FFmpeg-user] Unable to execute FFMPEG command

[Ravi Kumar]

Hello Team,

Hope you people are doing well.

Actually i am working on video app there is video call between two 
people using twillio. After their call finish i am taking videos and 
audios files from their room id and trying to merge all in a single 
mp4/webm file but leaving with synchronization issue. To solve that 
issue i have read a tutorial(URL : 
https://gist.github.com/igracia/581a8dfb8b88aa624c1d456adc6affb2) 
suggested by ffmpeg and implemented code but some of the commands are 
not working well. so if any one can help there is great appreciation.


We have implemented the new code. and final command that is created for 
merging videos is as below


ffmpeg -i /var/www/html/swipr/uploads/test/video1.mkv -i 
/var/www/html/swipr/uploads/test/video2.mkv -acodec libopus -i 
/var/www/html/swipr/uploads/test/audio1.mka -acodec libopus -i 
/var/www/html/swipr/uploads/test/audio2.mka -y -filter_complex " 
[0]scale=512:-2,pad=512:768:(ow-iw)/2:(oh-ih)/2[vs0],color=black:size=512x768:duration=2.716[b0],[b0][vs0]concat[r0c0];\[1]scale=512:-2,pa=512:768:(ow-iw)/2:(oh-ih)/2[vs1],color=black:size=512x768:duration=0[b1],[b1][vs1]concat[r0c1];\[r0c0][r0c1]hstack=inputs=2[video];\[2]aresample=async=1,adelay=2743.0|2743.0[a0];[3]aresample=async=1,adelay=5.0|5.0[a1];\[a0][a1]amix=inputs=2[audio]" 
-map[video] \ -map[audio] \ -acodec libopus \ -vcodec libvpx \ output.webm


After trying above command with different scenarios we are getting 
following errors.


#1)[AVFilterGraph @ 0x67fef00] No such filter: ' '
Error initializing complex filters.
Invalid argument

#2)Unrecognized option 
'filter_complex\[0]scale=512:-2,pad=512:768:(ow-iw)/2:(oh-ih)/2[vs0],color=black:size=512x768:duration=2.716[b0],[b0][vs0]concat[r0c0];\[1]scale=512:-2,pa=512:768:(ow-iw)/2:(oh-ih)/2[vs1],color=black:size=512x768:duration=0[b1],[b1][vs1]concat[r0c1];\[r0c0][r0c1]hstack=inputs=2[video];\[2]aresample=async=1,adelay=2743.0|2743.0[a0];[3]aresample=async=1,adelay=5.0|5.0[a1];\[a0][a1]amix=inputs=2[audio]-map[video]-map[audio]-acodec'.

Error splitting the argument list: Option not found

#3)Unrecognized option 'map[video]'.
Error splitting the argument list: Option not found

If we remove all the filters then we are getting a final output but that 
is not useful


Thanks






--

Kindly Regards
*Ravi Kumar*

TBI Logo
Sr. PHP Developer

*The Brihaspati Infotech Pvt. Ltd.*
*T* +917696981981 +918146052020

F-169, Sector 74, Phase-8B
Industrial Focal Point, Mohali (Punjab)
www.brihaspatitech.com 
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