[FFmpeg-user] Help with syntax using lv2 filter plugin

Fri May 10 18:33:36 EEST 2019

There was a slight copy-paste error in my last email.

Here are the contents of my file:
*/usr/local/lib/lv2/sdenoise.lv2/manifest.ttl*

@prefix lv2:  <http://lv2plug.in/ns/lv2core#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.

<https://github.com/lucianodato/speech-denoiser>
  a lv2:Plugin;
  lv2:binary <sdenoise.so> ;
  rdfs:seeAlso <sdenoise.ttl> .

What am I doing wrong?

On Fri, May 10, 2019 at 8:13 AM David Ing <ding at panopto.com> wrote:

> Moritz,
>
> Thank you.
>
> Although your suggestion did not work, you gave me enough information to
> find one that did.  The following works from a bash prompt.
>
> ffmpeg -i $INPUT -af 'lv2=plugin=https\\://
> github.com/lucianodato/speech-denoiser' $OUTPUT
>
>
> Now I have a separate problem which is:  *Plugin
> <https://github.com/lucianodato/speech-denoiser
> <https://github.com/lucianodato/speech-denoiser>> not found*
>
> root at b88297120832:/data# *ffmpeg -i $INPUT -af
> 'lv2=plugin=https\\://github.com/lucianodato/speech-denoiser
> <http://github.com/lucianodato/speech-denoiser>' $OUTPUT*
> ffmpeg version 4.1.3-0ubuntu1 Copyright (c) 2000-2019 the FFmpeg developers
>   built with gcc 8 (Ubuntu 8.3.0-6ubuntu1)
>   configuration: --prefix=/usr --extra-version=0ubuntu1
> --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
> --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
> --disable-stripping --enable-avresample --disable-filter=resample
> --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom
> --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca
> --enable-libcdio --enable-libcodec2 --enable-libflite
> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
> --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame
> --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt
> --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband
> --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex
> --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab
> --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp
> --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq
> --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl
> --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883
> --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
>   libavutil      56. 22.100 / 56. 22.100
>   libavcodec     58. 35.100 / 58. 35.100
>   libavformat    58. 20.100 / 58. 20.100
>   libavdevice    58.  5.100 / 58.  5.100
>   libavfilter     7. 40.101 /  7. 40.101
>   libavresample   4.  0.  0 /  4.  0.  0
>   libswscale      5.  3.100 /  5.  3.100
>   libswresample   3.  3.100 /  3.  3.100
>   libpostproc    55.  3.100 / 55.  3.100
> Guessed Channel Layout for Input Stream #0.0 : stereo
> Input #0, wav, from '/data/sample_car.wav':
>   Metadata:
>     encoder         : Lavf58.12.100
>   Duration: 00:01:05.02, bitrate: 1411 kb/s
>     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
> stereo, s16, 1411 kb/s
> File '/data/sample_car.sdenoise.wav' already exists. Overwrite ? [y/N] y
> Stream mapping:
>   Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native))
> Press [q] to stop, [?] for help
> [lv2 @ 0x55613f407300] *Plugin <**https://github.com/lucianodato/speech-denoiser
> <https://github.com/lucianodato/speech-denoiser>**> not found*
> [AVFilterGraph @ 0x55613f3e7140] Error initializing filter 'lv2' with args
> 'plugin=https\://github.com/lucianodato/speech-denoiser'
> Error reinitializing filters!
> Failed to inject frame into filter network: Invalid argument
> Error while processing the decoded data for stream #0:0
> Conversion failed!
>
>
> Now I don't know anything about LADSPA or LV2, but here are the contents
> of my file:  */usr/local/lib/lv2/sdenoise.lv2/manifest.ttl*
>
> @prefix lv2:  <http://lv2plug.in/ns/lv2core#>.
> @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
>
> <https://github.com/lucianodato/speech-denoiser>
>   a lv2:Plugin;
>   lv2:binary <sdenoise.so> ;
>   rdfs:seeAlso <sdenoise.ttl> .
>
> @prefix lv2:  <http://lv2plug.in/ns/lv2core#>.
> @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
>
> <https://github.com/lucianodato/speech-denoiser>
>   a lv2:Plugin;
>   lv2:binary <sdenoise.so> ;
>   rdfs:seeAlso <sdenoise.ttl> .
>
>
> What am I doing wrong?
>
> On Fri, May 10, 2019 at 12:51 AM Moritz Barsnick <barsnick at gmx.net> wrote:
>
>> On Thu, May 09, 2019 at 15:57:01 -0700, David Ing wrote:
>> > The command I'm using is:
>> >
>> >     ffmpeg -i $INPUT -af lv2=plugin=https\\\\://
>> github.com/lucianodato/speech-denoiser $OUTPUT
>>
>> Apparently, the quoting isn't sufficient, because:
>>
>> > error: attempt to map invalid URI `https'
>> > [lv2 @ 0x561771d961c0] Invalid plugin URI <https>
>>
>> I.e. the ":" in the URI ist still considered a filter option separator.
>>
>> Could you please try:
>> $ ffmpeg -i $INPUT -af "lv2=plugin='
>> https://github.com/lucianodato/speech-denoiser'" $OUTPUT
>>
>> > I tried to follow the documentation but it was a bit vague.
>> >     https://ffmpeg.org/ffmpeg-filters.html#lv2
>>
>> It's an issue with quoting, not about lv2.
>>
>> There are several chapters in the docs, but they might confuse you even
>> more:
>> http://ffmpeg.org/ffmpeg-utils.html#quoting_005fand_005fescaping
>> http://ffmpeg.org/ffmpeg-filters.html#Notes-on-filtergraph-escaping
>>
>> >     https://github.com/lucianodato/speech-denoiser/issues/16
>>
>> Your "docker run" will introduce another level of (shell) escaping into
>> this hell. :-(
>>
>> HTH,
>> Moritz
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>
>