Neither does this work: #OUTPUT=out.mp4 OUTPUT="http://localhost:5554/video.ffm" ffmpeg -f alsa -i hw:0,0 -filter_complex "[0:a]showwaves=split_channels=1:s=1280x720:mode=line:colors=Red|Blue[v]" -map "[v]" -map 0:a $OUTPUT
On Wed, 30 Jan 2019 at 11:09, Zoltan Kerenyi Nagy < kerenyi.nagy.zol...@gmail.com> wrote: > Thanks your're right! > > Unfortunately it still doesnt work: > ffmpeg -f alsa -i hw:0,0 -f lavfi -i nullsrc -filter_complex > "[0]showwaves=split_channels=1:s=1280x720:mode=line:colors=Red|Blue" -c:v > libx264 -preset fast -crf 23 -c:a copy http://localhost:5554/video.ffm > > On Wed, 30 Jan 2019 at 09:45, Moritz Barsnick <barsn...@gmx.net> wrote: > >> On Tue, Jan 29, 2019 at 23:04:23 +0100, Zoltan Kerenyi Nagy wrote: >> > Slight modification does not work either: >> > >> > ffmpeg -f lavfi -i nullsrc -f alsa -i hw:0,0 -filter_complex >> > "[0:a]showwaves=s=1280x720:mode=line:colors=Blue[v]" -map "[v]" -map 0:a >> > -c:v libx264 -r 15 http://localhost:5554/video.ffm >> > >> > error: >> > >> > Stream specifier ':a' in filtergraph description >> > [0:a]showwaves=s=1280x720:mode=line:colors=Blue[v] matches no streams. >> >> This is why you should always show us the *complete* uncut console >> output. You are hiding interesting info otherwise. >> >> Your first input (0) is nullsrc, a video source. So "[0:a]" does not >> specify a valid stream. You are not even using nullsrc, so you should >> probably omit "-f lavfi -i nullsrc", then the rest should work. >> >> Moritz >> _______________________________________________ >> ffmpeg-user mailing list >> ffmpeg-user@ffmpeg.org >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >> >> To unsubscribe, visit link above, or email >> ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".