I need to monitor audio levels while capturing audio/video. To achieve this I tried simple thing first: # ffmpeg -i Like\ an\ e-bird.mp3 -lavfi showvolume -f xv audiolevel And I've got: ... Stream mapping: Stream #0:0 (mp3) -> showvolume showvolume -> Stream #0:0 (rawvideo) Could not write header for output file #0 (incorrect codec parameters ?): Not yet implemented in FFmpeg, patches welcome
At the same time I can play any video on xv device without problem, like this: # ffmpeg -i video.avi -f xv video ... Stream mapping: Stream #0:0 -> #0:0 (mpeg4 (native) -> rawvideo (native)) Press [q] to stop, [?] for help Also, I can encode output of lavfi to file: # ffmpeg -i Like\ an\ e-bird.mp3 -lavfi showvolume -c:v h264 -an volmon.mp4 _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
