#483: libavformat needs timefilter for OUTDEV as well as INDEV
-------------------------------------+-------------------------------------
Reporter: skierpage | Type: defect
Status: new | Priority: normal
Component: build | Version: git-
system | master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
(I'm building from git to debug some QCELP audio playback problems.)
From "Get FFmpeg" I downloaded git snapshot. I don't need all of ffmpeg so
I tried
% ./configure --prefix=/home/skierpage/src/ffmpeg --disable-network
--disable-indevs
% make
This errors with
{{{
LD ffmpeg_g
libavdevice/libavdevice.a(alsa-audio-common.o): In function
`ff_alsa_close':
/home/skierpage/src/ffmpeg-HEAD-9a9ceb8/libavdevice/alsa-audio-
common.c:322: undefined reference to `ff_timefilter_destroy'
collect2: ld returned 1 exit status
Reaping losing child 0x01d24890 PID 11332
make: *** [ffmpeg_g] Error 1
}}}
It's building alsa because configure detects HAVE_ALSA_ASOUNDLIB_H on my
system, so config.mak sets CONFIG_ALSA_OUTDEV=yes. At first I thought the
problem was, like like libavdevice/jack-audio.c , libavdevice/alsa-audio-
common.c needs to add
#include "libavformat/timefilter.h"
but that doesn't help.
It seems the problem is libavformat's Makefile only compiles in
timefilter.c if CONFIG_ALSA_INDEV is set. But you still need timefilter
if you have no input device named alsa (e.g. because you configure with
--disable-indevs) but you have an alsa outdev. A dumb patch that allows
make to complete and results in working avconv is
{{{
--- libavformat/Makefile.org 2011-09-17 13:36:43.000000000 -0700
+++ libavformat/Makefile 2011-09-17 18:00:02.698529430 -0700
@@ -347,6 +347,7 @@
# libavdevice dependencies
OBJS-$(CONFIG_ALSA_INDEV) += timefilter.o
+OBJS-$(CONFIG_ALSA_OUTDEV) += timefilter.o
OBJS-$(CONFIG_JACK_INDEV) += timefilter.o
}}}
I suspect if configure detects Jack audio and you've disabled input
devices, the Makefile will need a similar line for CONFIG_JACK_OUTDEV.
I hope this helps. Thank you for ffmpeg's massive AV format support.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/483>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker
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