Your message dated Wed, 21 Sep 2016 13:41:44 +0200
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has caused the Debian Bug report #810224,
regarding /usr/bin/avconv: ogg format: unable to use pass and quality? options 
to be marked as done.

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--- Begin Message ---
Package: libav-tools
Version: 6:11.4-1~deb8u1
Severity: normal
File: /usr/bin/avconv


i'm not a regular user of avconv,
but didn't find any clear answers;
so ignore this report if u know better

Analog to
i tried to compress video files the free open format ogv (theora + vorbis)

First when trying to convert in two steps:
avconv    -i "$INPUT_FILE" -threads auto -c:v libtheora -pass 1 -an -f ogg -y 
avconv    -i "$INPUT_FILE" -threads auto -c:v libtheora -pass 2 -c:a libvorbis 
-y "$OUTPUT"
this does not accept the -q:v 1 and -q:a 1 options (or -b:a -b:v options)

avconv    -i "$INPUT_FILE" -threads auto -c:v libtheora -q:v 1 -c:a libvorbis 
-q:a 1 -y "$OUTPUT"
Further: looking at the process output cmdline:
Output #0, ogg, to 'out.ogv':
    encoder         : Lavf56.1.0
    Stream #0.0: Video: libtheora, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 
q=2-31, 200 kb/s, 10.67 fps, 10.67 tbn, 10.67 tbc
does not show the asked quality (2-31 is shown instead)

Examining with exiftool:
the files with different q options differ in size and metadata,
as is to be expected

the man page and doc files are not easy to use in this case or the 
implementation is missing some features

I also noticed that this seems to be singletreaded (in contrast to the analog 
code in gist, 
which i also ran, and is multitreaded)


-- System Information:
Debian Release: 8.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=nl_BE.utf8, LC_CTYPE=nl_BE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libav-tools depends on:
ii  dpkg             1.17.26
ii  libavcodec56     6:11.4-1~deb8u1
ii  libavdevice55    6:11.4-1~deb8u1
ii  libavfilter5     6:11.4-1~deb8u1
ii  libavformat56    6:11.4-1~deb8u1
ii  libavresample2   6:11.4-1~deb8u1
ii  libavutil54      6:11.4-1~deb8u1
ii  libc6            2.19-18+deb8u1
ii  libsdl1.2debian  1.2.15-10+b1
ii  libswscale3      6:11.4-1~deb8u1
ii  libvdpau1        0.8-3+deb8u2
ii  libx11-6         2:1.6.2-3

libav-tools recommends no packages.

Versions of packages libav-tools suggests:
ii  frei0r-plugins  1.4-3

-- no debconf information

--- End Message ---
--- Begin Message ---
# invalid according to upstream dev:
notfound 810224 6:11.4-1~deb8u1

--- End Message ---

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