[FFmpeg-user] L-SMASH-WORKS and replacement for deprecated ffmpeg --enable-avresample

[h***@gmail.com]

Hello. I gather that when built from source, x264.exe can
- input various container formats if built with "lavf support" (from
ffmpeg).
- output various container formats if built with "L-SMASH support" (from
L-SMASH-WORKS) https://github.com/VFR-maniac/L-SMASH-Works

eg from it's help:
Infile can be raw (in which case resolution is required),
or YUV4MPEG (*.y4m),
or Avisynth if compiled with support (yes).
or libav* formats if compiled with lavf support (yes) or ffms support
(no).
Outfile type is selected by filename:
.264 -> Raw bytestream
.mkv -> Matroska
.flv -> Flash Video
.mp4 -> MP4 if compiled with GPAC or L-SMASH support (lsmash)
Output bit depth: 8/10

However, L-SMASH-WORKS depends on an ffmpeg lib built with
--enable-avresample and LSW fails to build without it.

Unfortunately, ffmpeg's --enable-avresample is deprecated ?

So ...
what did ffmpweg replace --enable-avresample with
and in your view would there be some possibility of being able to patch
L-SMASH-WORKS to use that instead ?

The scenario being considered is cross-compiling it all under Ubuntu to run
in Win10 x64 (it works).

Thanks


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[Moritz Barsnick]

Post by h***@gmail.com
However, L-SMASH-WORKS depends on an ffmpeg lib built with
--enable-avresample and LSW fails to build without it.
Unfortunately, ffmpeg's --enable-avresample is deprecated ?

But it's still available as of today.

Post by h***@gmail.com
what did ffmpweg replace --enable-avresample with
and in your view would there be some possibility of being able to patch
L-SMASH-WORKS to use that instead ?

This commit:

https://github.com/FFmpeg/FFmpeg/commit/c29038f3041a4080342b2e333c1967d136749c0f

says:

"Users of this library are asked to migrate to libswresample, which,
as well as providing more functionality, is faster and has higher
accuracy."

Post by h***@gmail.com
- input various container formats if built with "lavf support" (from ffmpeg).
- output various container formats if built with "L-SMASH support" (from
L-SMASH-WORKS) https://github.com/VFR-maniac/L-SMASH-Works

Does it support any formats which ffmpeg (the command line tool) does
not? If not, you could use ffmpeg.exe instead if x264.exe.

Cheers,
Moritz
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[h***@gmail.com]

Moritz Barsnick
Sent: Tuesday, November 27, 2018 1:03 AM
Subject: Re: [FFmpeg-user] L-SMASH-WORKS and replacement for
deprecated ffmpeg --enable-avresample

Post by h***@gmail.com
However, L-SMASH-WORKS depends on an ffmpeg lib built with
--enable-avresample and LSW fails to build without it.
Unfortunately, ffmpeg's --enable-avresample is deprecated ?

But it's still available as of today.

Yes it is. I am currently able to cross compile ffmpeg and x264-with-LSW
https://github.com/VFR-maniac/L-SMASH-Works with ffmpeg --enable-avresample,
using a variation of the ffmpeg/x264 build script (edited to add in lsw)
at https://github.com/DeadSix27/python_cross_compile_script
however the author (Deadsix27) prefers not to permanently add in lsw support
on the basis that avresample in ffmpeg is deprecated.
A github issue was raised with the author of L-SMASH-Works early this year
however nothing public has been visible as yet and it seems the author may
have other ongoing priorities.

Post by h***@gmail.com
what did ffmpweg replace --enable-avresample with and in your view
would there be some possibility of being able to patch L-SMASH-WORKS
to use that instead ?

https://github.com/FFmpeg/FFmpeg/commit/c29038f3041a4080342b2e333
c1967d136749c0f
"Users of this library are asked to migrate to libswresample, which,
as well as providing more functionality, is faster and has higher
accuracy."

OK, thank you for that info.
I'm tempted to have a bit of a look and if easy enough, consider trying
to resurrect 40 yo coding skills 😊 in a fork. Or, not.

Post by h***@gmail.com
- input various container formats if built with "lavf support" (from ffmpeg).
- output various container formats if built with "L-SMASH support" (from
L-SMASH-WORKS) https://github.com/VFR-maniac/L-SMASH-Works

Does it support any formats which ffmpeg (the command line tool) does not?
If not, you could use ffmpeg.exe instead if x264.exe.

Yes, my home video workflow was recently updated to use just ffmpeg
instead. As you say, I suppose I could stick with that, although it's handy to
have an enhanced x264 as well (built with libav* lsmash).

Post by h***@gmail.com
Infile can be raw (in which case resolution is required),
or YUV4MPEG (*.y4m),
or Avisynth if compiled with support (yes).
or libav* formats if compiled with lavf support (yes) or ffms support (no).
.264 -> Raw bytestream
.mkv -> Matroska
.flv -> Flash Video
.mp4 -> MP4 if compiled with GPAC or L-SMASH support (lsmash)
Output bit depth: 8/10

Cheers,
Moritz

Thanks, Moritz !
Cheers, le hydra.

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