Thanks. Posted below. I see here it's not been compiled with ffmpeg or libav. I guess I either need to compile myself for Rpi3 bullseye, or find another build?
From apt, this package is tvheadend/raspbian-stretch,now 4.3-1994~gc7b713edb~raspbianstretch armhf [installed]
pi@raspberrypi:~ $ cat /etc/apt/sources.list.d/tvheadend.list
deb http://apt.tvheadend.org/unstable raspbian-stretch main
Configure arguments:
--build=arm-linux-gnueabihf --prefix=/usr --includedir=${prefix}/include --mandir=${prefix}/share/man --infodir=${prefix}/share/info --sysconfdir=/etc --localstatedir=/var --disable-silent-rules --libexecdir=${prefix}/lib/tvheadend --disable-maintainer-mode --disable-dependency-tracking --enable-ccache --enable-hdhomerun_static --disable-ffmpeg_static --arch=armhf --jobs=9
Compiler:
Using C compiler: ccache cc
Using LD flags: -ldvbcsa
Build for arch: armhf
Binaries:
Using PYTHON: python
Using GZIP: gzip
Using BZIP2: bzip2
Options:
pie yes
ccdebug no
cardclient yes
cwc yes
cccam yes
capmt yes
constcw yes
linuxdvb yes
satip_server yes
satip_client yes
hdhomerun_client yes
hdhomerun_static yes
iptv yes
tsfile yes
dvbscan yes
timeshift yes
trace yes
avahi yes
zlib yes
libav no
ffmpeg_static no
libx264 yes
libx264_static yes
libx265 yes
libx265_static yes
libvpx yes
libvpx_static yes
libtheora yes
libtheora_static yes
libvorbis yes
libvorbis_static yes
libfdkaac no
libfdkaac_static yes
libopus yes
libopus_static yes
nvenc no
vaapi no
mmal no
omx no
inotify yes
epoll yes
pcre no
pcre2 yes
uriparser yes
ccache yes
tvhcsa yes
bundle no
pngquant no
kqueue no
dbus_1 yes
android no
gtimer_check no
slow_memoryinfo no
libsystemd_daemon no
pcloud_cache yes
ddci yes
cclang_threadsan no
gperftools no
execinfo yes
W_unused_result yes
f_stack_protector yes
f_stack_protector_strong yes
f_stack_check yes
f_PIE yes
fdatasync yes
getloadavg yes
atomic32 yes
atomic64 yes
atomic_time_t yes
atomic_ptr yes
bitops64 yes
lockowner yes
qsort_r yes
stime yes
gmtoff yes
recvmmsg yes
sendmmsg yes
ifnames yes
py_gzip yes
bin_pkg_config yes
bin_xgettext yes
bin_msgmerge yes
bin_gzip yes
bin_bzip2 yes
ssl yes
linuxdvbapi yes
linuxdvb_ca yes
upnp yes
inotify_h yes
inotify_init1 yes
dvbcsa yes
epoll_create1 yes
mpegts yes
mpegts_dvb yes
Packages:
openssl 1.1.0l
zlib 1.2.8
libpcre2-8 10.22
liburiparser 0.8.4
avahi-client 0.6.32
dbus-1 1.10.32
Installation paths:
Prefix: /usr
Binaries: ${prefix}/bin
Libraries: ${prefix}/lib
Data files: ${prefix}/share
Man pages: /usr/share/man