All audio files are converted to "video" format if `--desttype` contains `MP3+WEBM` or `MP3+MP4`.

dreirund commented 2 years ago

This is a follow up from → here (issue #86):

What I do:

I mount a directory containing music files with ffmpegfs as follows:

ffmpegfs -o allow_other,ro --max_threads=1 --desttype=MP3+WEBM --autocopy=MATCH --profile=FF --level=STANDARD --hwaccel_enc=VAAPI --hwaccel_dec=VAAPI -f -d /home/music /mnt/ffmpegfs/music/

In that directory I have audio files in the formats OGG/Vorbis, mp3, AAC (without container), and some others.

Problem:

I observe that all the audio files get converted to WebM, and not MP3; even preexisting MP3 get converted to WebM.

Expected behaviour:

Convert at least file formats which are known to be audio only (.mp3, .wav, .flac) to MP3.

Examples:

Original files:

sounds/letter_in_mailbox.ogg
sounds/water.mp3
sounds/silence/flac/silence-010s.flac
sounds/silence/flac/silence-060s.wav
Hannes_Wader/Der_Rattenfaenger/01_-_Der_Rattenfaenger.aac
Klassik/Bedrich_Smetana/Smetana_-_Vltava.mp4

Files in `ffmpegfs` mount:

sounds/letter_in_mailbox.ogg.webm
sounds/water.mp3.webm
sounds/silence/flac/silence-010s.flac.webm
sounds/silence/flac/silence-060s.wav.webm
Hannes_Wader/Der_Rattenfaenger/01_-_Der_Rattenfaenger.aac.webm
Klassik/Bedrich_Smetana/Smetana_-_Vltava.mp4.webm

More detailed investigation for 1. `sounds/letter_in_mailbox.ogg`:

Original file:

mediainfo sounds/letter_in_mailbox.ogg:

General
Complete name                            : sounds/letter_in_mailbox.ogg
Format                                   : Ogg
File size                                : 12.5 KiB
Duration                                 : 2 s 404 ms
Overall bit rate mode                    : Variable
Overall bit rate                         : 42.5 kb/s
Comment                                  : File created by GoldWave.  GoldWave copyright (C) Chris Craig

Audio
ID                                       : 1804289383 (0x6B8B4567)
Format                                   : Vorbis
Duration                                 : 2 s 404 ms
Bit rate mode                            : Variable
Bit rate                                 : 29.0 kb/s
Channel(s)                               : 1 channel
Sampling rate                            : 11.025 kHz
Compression mode                         : Lossy
Stream size                              : 8.51 KiB (68%)
Writing library                          : libVorbis 1.0.1 (UTC 2003-09-09)

ffprobe sounds/letter_in_mailbox.ogg:

ffprobe version n4.4 Copyright (c) 2007-2021 the FFmpeg developers
built with gcc 11.1.0 (GCC)
configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc --enable-shared --enable-version3
libavutil      56. 70.100 / 56. 70.100
libavcodec     58.134.100 / 58.134.100
libavformat    58. 76.100 / 58. 76.100
libavdevice    58. 13.100 / 58. 13.100
libavfilter     7.110.100 /  7.110.100
libswscale      5.  9.100 /  5.  9.100
libswresample   3.  9.100 /  3.  9.100
libpostproc    55.  9.100 / 55.  9.100
Input #0, ogg, from 'sounds/letter_in_mailbox.ogg':
Duration: 00:00:02.40, start: 0.000000, bitrate: 42 kb/s
Stream #0:0: Audio: vorbis, 11025 Hz, mono, fltp, 29 kb/s
  Metadata:
    COMMENT         : File created by GoldWave.  GoldWave copyright (C) Chris Craig
                    :

File in `ffmpegfs` mount:

[→ Here] I have attached the terminal output of a run of ffmpegfs -o allow_other,ro --max_threads=1 --desttype=MP3+WEBM --autocopy=MATCH --profile=FF --level=STANDARD --hwaccel_enc=VAAPI --hwaccel_dec=VAAPI -f -d /home/music /mnt/ffmpegfs/music/ after complete deletion of ffmpegfs's cache with a read of sounds/letter_in_mailbox.ogg.webm (dd if=sounds/letter_in_mailbox.ogg.webm of=/dev/zero).

mediainfo sounds/letter_in_mailbox.ogg.webm:

General
Complete name                            : sounds/letter_in_mailbox.ogg.webm
Format                                   : WebM
Format version                           : Version 4
File size                                : 10.8 KiB
Duration                                 : 2 s 404 ms
Overall bit rate                         : 36.8 kb/s
Writing application                      : Lavf58.76.100
Writing library                          : Lavf58.76.100
Comment                                  : File created by GoldWave.  GoldWave copyright (C) Chris Craig
IsTruncated                              : Yes

Audio
ID                                       : 1
Format                                   : Opus
Codec ID                                 : A_OPUS
Duration                                 : 2 s 404 ms
Channel(s)                               : 1 channel
Channel layout                           : C
Sampling rate                            : 12.0 kHz
Bit depth                                : 32 bits
Compression mode                         : Lossy
Default                                  : Yes
Forced                                   : No
Comment                                  : File created by GoldWave.  GoldWave copyright (C) Chris Craig

ffprobe sounds/letter_in_mailbox.ogg.webm:

ffprobe version n4.4 Copyright (c) 2007-2021 the FFmpeg developers
built with gcc 11.1.0 (GCC)
configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc --enable-shared --enable-version3
libavutil      56. 70.100 / 56. 70.100
libavcodec     58.134.100 / 58.134.100
libavformat    58. 76.100 / 58. 76.100
libavdevice    58. 13.100 / 58. 13.100
libavfilter     7.110.100 /  7.110.100
libswscale      5.  9.100 /  5.  9.100
libswresample   3.  9.100 /  3.  9.100
libpostproc    55.  9.100 / 55.  9.100
Input #0, matroska,webm, from 'sounds/letter_in_mailbox.ogg.webm':
Metadata:
  COMMENT         : File created by GoldWave.  GoldWave copyright (C) Chris Craig
                  : 
  ENCODER         : Lavf58.76.100
Duration: 00:00:02.40, start: -0.002000, bitrate: 36 kb/s
Stream #0:0: Audio: opus, 48000 Hz, mono, fltp (default)
  Metadata:
    COMMENT         : File created by GoldWave.  GoldWave copyright (C) Chris Craig
                    :

Further remarks:

Similar if I change WEBM to MP4 in the destination format specification: Then it converts all to MP4.
Note that the .flac.webm and .wav.webm files could not be played back at all (while the original files work). They do work if I change target format WEBM to MP4 and remove the --autocopy.
Removing --autocopy does still convert the audio files to WebM or MP4.

Software version:

ffmpegfs --version:

-------------------------------------------------------------------------------------------
Built with          : gcc 11.1.0 (linux-gnu)
configuration       : --prefix=/usr --disable-debug --with-libswresample --with-libavresample --with-libdvd --with-libbluray --with-libvcd --with-extra-version=git20211031.8bf2856f

FFMPEGFS Version    : 2.7-git20211031.8bf2856f
FFmpeg Version      : n4.4
Video CD Library    : enabled
DVD Library         : enabled
Bluray Library      : 1.3.0
FUSE library version: 2.9.9
fusermount version: 2.9.9
using FUSE kernel interface version 7.19

nschlia commented 2 years ago

This is not a bug, the correct format would be --desttype=WEBM+MP3 or --desttype=MP4+MP3, the video format must be specified first.

For example, with --desttype=WEBM+MP3 all MP3/WAV files are converted to MP3, and MP4 to WebM, as expected.

I'll add a check, if an audio only format is specified first, the command line will be rejected with an error message.

dreirund commented 2 years ago

This is not a bug, the correct format would be --desttype=WEBM+MP3 or --desttype=MP4+MP3, the video format must be specified first.

Thanks, that explains things and now it works as expected.

OGG files get converted to videos, maybe because it is a container that might contain video at all.

(file sounds/letter_in_mailbox.ogg says
sounds/letter_in_mailbox.ogg: Ogg data, Vorbis audio, mono, 11025 Hz, ~29000 bps, created by: Xiph.Org libVorbis I (1.0.1)
though, so it looks like that already at that point can be determined that there is only audio, but I think this will be tackled by issue #86.)

Thanks for the clarification, and

I'll add a check, if an audio only format is specified first, the command line will be rejected with an error message.

thanks for the wrong-input handling!

-- Machen ist wie wollen, nur krasser.

nschlia commented 2 years ago

OGG files get converted to videos, maybe because it is a container that might contain video at all.

Yep. OGG is video capable. FFmpegfs handles the formats quit dumb. For example, using using --desttype=WEBM+MP3: MP3, AIFF, WAV - make MP3s. WebM, AVI, MP4, OGG - make WebM.

I'll enhance that as with issue #86.

Thanks for the clarification, and thanks for the wrong-input handling!

You're welcome!

nschlia / ffmpegfs