On 10/14/20 11:18 AM, Greg Oliver wrote:
sorry just realized I had to redirect stderr to get the results
On Wed, Oct 14, 2020 at 10:17 AM Greg Oliver <oliver.g...@gmail.com> wrote:
On Tue, Oct 13, 2020 at 8:50 AM Mar Andrés López <mar.andre...@gmv.com>
wrote:
Dear all,
I am using the following command to generate dash content from a file:
ffmpeg -i video.mp4 –r 25 -c:v libx264 -c:a aac -b:a 128k -ac 1 -ar 44100
-map v:0 -b:v:0 2M -map v:0 -b:v:1 145k -map v:0 -b:v:2 365k -map 0:a -f
dash dash.mpd
But sometimes I have streams with audio and sometimes not. Is there
anyway to make this command to not break if the video file does not
contains audio?
A lot of thanks
Assuming you are scripting this, probe the file first and check for
audio. Use a separate ffmpeg command line for eac result.
ffprobe <infile> | grep "Stream.*Audio"
if [ $? -eq 0 ]; then
ffmpeg command with audio
else
ffmpeg command without audio
fi
ffprobe <infile> 2>&1 | grep "Stream.*Audio"
if [ $? -eq 0 ]; then
ffmpeg command with audio
else
ffmpeg command without audio
fi
_______________________________________________
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
From here: https://ffmpeg.org/ffmpeg-all.html
"To map the video and audio streams from the first input, and using the
trailing ?, ignore the audio mapping if no audio streams exist in the
first input:
ffmpeg -i INPUT -map 0:v -map 0:a? OUTPUT"
Will.
_______________________________________________
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
