Hi > On 12 Jan 2018, at 13:32, Дмитрий Гуменюк <dmitry.gumen...@gmail.com> wrote: > >> On 12 Jan 2018, at 13:17, Tobias Rapp <t.r...@noa-archive.com >> <mailto:t.r...@noa-archive.com>> wrote: >> >> On 12.01.2018 12:16, Дмитрий Гуменюк wrote: >>> Hi >>>> On 11 Jan 2018, at 09:20, Tobias Rapp <t.r...@noa-archive.com >>>> <mailto:t.r...@noa-archive.com>> wrote: >>>> >>>> On 10.01.2018 18:18, Kyle Swanson wrote: >>>>> Hi, >>>>> For this to be a part of libavfilter the output needs to be more generic >>>>> than the just the Soundcloud format. If we want this to be generally >>>>> useful >>>>> it should probably just output an array of floats between 0.0 and 1.0. The >>>>> consumer of this data (JS library, or whatever) can use this in whatever >>>>> way it wants. >>>> >>>> I agree. If the BWF Peak Envelope output which was suggested in the other >>>> thread does not match your demands and filter implementation is actually >>>> necessary I would prefer if the filter would attach the RMS value(s) as >>>> frame metadata instead of directly dumping to file. Frame metadata can >>>> then be re- >>> RMS values may be counted for several frames or only for a half of a frame >>>> used by other filters or dumped into file by using the existing >>>> "ametadata" filter. >>>> >>>> This would be similar to: >>>> >>>> ffmpeg -i input-file -f null -filter:a >>>> "asetnsamples=22050,astats=metadata=on,ametadata=print:file=stats-file.dat" >>>> /dev/null >>> I like this idea, but won’t asetnsamples affect performance by creating >>> fifo queue? And it may require some effort to parse long output >> >> I added asetnsamples to define the audio frame size (interval of values from >> astats). You can reduce the number of lines printed by ametadata by using >> the "key=lavfi.astats.foo" option. > I used asetnsamples as well, and I measured performance while transcoding - > it appears to be slight slower I think output is now more generic and I got rid of long switch/case, thanks for support
>> >> Regards, >> Tobias >> >> _______________________________________________ >> ffmpeg-devel mailing list >> ffmpeg-devel@ffmpeg.org <mailto:ffmpeg-devel@ffmpeg.org> >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> <http://ffmpeg.org/mailman/listinfo/ffmpeg-devel>
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