Bug#790918: libav-tools: bitrate 448 is not allowed in mp2 / convert to pal dvd with mp2 audio

[Richard Gomes]

Package: libav-tools
Version: 6:11.4-1~deb8u1
Severity: normal

Dear Maintainer,


Please consider applying the fix below onto libav:

    https://trac.ffmpeg.org/ticket/3736

---

The command I tried was

avconv -loop 1 -f image2 -i
/home/rgomes/Videos/BBC4/dvd_1/movie/menu/menu_0_bg.png -i
/usr/local/share/devede_ng/silence.ogg -y -target pal-dvd -acodec mp2 -s
720x576 -g 12 -b:v 2500k -b:a 224k -aspect 4:3 -t 31
/home/rgomes/Videos/BBC4/dvd_1/movie/menu/menu_0.mpg

.... which is produced by an application called DeVeDe NG.
https://github.com/rastersoft/devedeng

The command fails as described in the ticket
https://trac.ffmpeg.org/ticket/3736

Changing the bitrate of the audio codec from 224k to 128K, 64K, 32K, 16K, 8K is
absolutely innefective. The error persists.
Changing the audio codec from mp2 to mp3 circumvents the trouble.

---

Ways to circumvent the trouble:

1. package devede (which is the 'old' version of the application) works fine in
a similar scenario.
But package devede has other bugs and apparently is not being actively
maintained, since there's a new version of the application.

2. I can modify devede-ng (the 'new' version of the application) and build from
sources.
This way the behavior being employed by the 'old' version of the application
can be applied to this case.


Thanks

-- Richard Gomes



-- System Information:
Debian Release: 8.1
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (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                 1.17.25
ii  libavcodec-extra-56  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
ii  libsdl1.2debian      1.2.15-10+b1
ii  libswscale3          6:11.4-1~deb8u1
ii  libvdpau1            0.8-3
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