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

Paul B Mahol onemda at gmail.com
Fri May 10 19:07:53 EEST 2019 

On 5/10/19, David Ing <ding at panopto.com> wrote:
> 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?

Have you read examples in lv2 documentation?

There is ':' escaped with '\' fourth times.

>>
>> 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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>>> ffmpeg-user at ffmpeg.org
>>> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>>
>>> To unsubscribe, visit link above, or email
>>> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".
>>
>>
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