gpac build error

[mf2k (Frank Schima)]

I'm seeing an error trying to build gpac. I'm not sure if it's due to ffmpeg or my recent update of Xcode to version 5.0. I'm Cc'ing the maintainers of ffmpeg for possible comment.

Error is:

:info:build cc -I/opt/local/include -O3  -arch x86_64 -Wall -fno-strict-aliasing -Wno-pointer-sign -fPIC -DPIC -fvisibility="hidden" -DGPAC_HAVE_CONFIG_H -I"/opt/local/var/macports/build/_opt_mports_trunk_dports_multimedia_gpac/gpac/work/gpac" -Wno-deprecated-declarations -I"/opt/local/var/macports/build/_opt_mports_trunk_dports_multimedia_gpac/gpac/work/gpac/include" -I/opt/local/include -c -o ffmpeg_decode.o ffmpeg_decode.c 
:info:build In file included from ffmpeg_decode.c:25:
:info:build ./ffmpeg_in.h:120:17: error: use of undeclared identifier 'AVCODEC_MAX_AUDIO_FRAME_SIZE'
:info:build         char audio_buf[AVCODEC_MAX_AUDIO_FRAME_SIZE];
:info:build                        ^
:info:build ffmpeg_decode.c:172:11: warning: implicit declaration of function 'avcodec_alloc_context' is invalid in C99 [-Wimplicit-function-declaration]
:info:build           *ctx = avcodec_alloc_context();
:info:build                  ^
:info:build ffmpeg_decode.c:172:9: warning: incompatible integer to pointer conversion assigning to 'AVCodecContext *' (aka 'struct AVCodecContext *') from 'int' [-Wint-conversion]
:info:build           *ctx = avcodec_alloc_context();
:info:build                ^ ~~~~~~~~~~~~~~~~~~~~~~~
:info:build ffmpeg_decode.c:278:14: warning: equality comparison with extraneous parentheses [-Wparentheses-equality]
:info:build         if ((ffd->st==GF_STREAM_VISUAL)) {
:info:build              ~~~~~~~^~~~~~~~~~~~~~~~~~
:info:build ffmpeg_decode.c:278:14: note: remove extraneous parentheses around the comparison to silence this warning
:info:build         if ((ffd->st==GF_STREAM_VISUAL)) {
:info:build             ~       ^                 ~
:info:build ffmpeg_decode.c:278:14: note: use '=' to turn this equality comparison into an assignment
:info:build         if ((ffd->st==GF_STREAM_VISUAL)) {
:info:build                     ^~
:info:build                     =
:info:build ffmpeg_decode.c:320:7: warning: implicit declaration of function 'avcodec_open' is invalid in C99 [-Wimplicit-function-declaration]
:info:build                 if (avcodec_open((*ctx), (*codec) )<0) return GF_NON_COMPLIANT_BITSTREAM;
:info:build                     ^
:info:build ffmpeg_decode.c:614:12: error: use of undeclared identifier 'AVCODEC_MAX_AUDIO_FRAME_SIZE'
:info:build                 gotpic = AVCODEC_MAX_AUDIO_FRAME_SIZE;
:info:build                          ^
:info:build 4 warnings and 2 errors generated.
:info:build make[2]: *** [ffmpeg_decode.o] Error 1

[dbevans (David B. Evans)]

This is due to the removal of long deprecated API features in the ffmpeg 2.0 series: AVCODEC_MAX_AUDIO_FRAME_SIZE has been removed. Looks like there are fixes for this in upstream svn or possibly you could configure gpac to use the embedded ffmpeg copy.

[mf2k (Frank Schima)]

I attempted to use the embedded ffmpeg copy and it failed at the same place. Indeed, I still see AVCODEC_MAX_AUDIO_FRAME_SIZE is in the included ffmpeg.h.

[dbevans (David B. Evans)]

I got the same result when I tried it just now.

I then deactivated ffmpeg and tried again. This got rid of the AVCODEC_MAX_AUDIO_FRAME_SIZE error. However, it then failed as follows:

cc -I/opt/local/include -O3  -arch x86_64 -Wall -fno-strict-aliasing -Wno-pointer-sign -fPIC -DPIC -fvisibility="hidden" -DGPAC_HAVE_CONFIG_H -I"/opt/local/var/macports/build/_opt_macports_trunk_dports_multimedia_gpac/gpac/work/gpac" -Wno-deprecated-declarations -I"/opt/local/var/macports/build/_opt_macports_trunk_dports_multimedia_gpac/gpac/work/gpac/include"  -DFFMPEG_OLD_HEADERS -I/usr/include -I"/opt/local/var/macports/build/_opt_macports_trunk_dports_multimedia_gpac/gpac/work/gpac/extra_lib/include" -c -o ffmpeg_decode.o ffmpeg_decode.c 
In file included from ffmpeg_decode.c:25:
./ffmpeg_in.h:74:10: fatal error: 'ffmpeg/avformat.h' file not found
#include <ffmpeg/avformat.h>

Conclusions:

• even though it's configured for the local ffmpeg copy it's using include files from the external one if it's installed due to the -I/opt/local/include at the beginning of the compile command

• if external ffmpeg is deactivated it still isn't including the local .h files correctly (or worse they're not available)

• note that the compile command is using 'cc' for the compiler. This is one of Ryan's UseTheRightCompiler problems (not related to ffmpeg).

[dbevans (David B. Evans)]

Missing avformat.h is here:

extra_lib/include/libavformat/avformat.h

referenced here:

modules/ffmpeg_in/ffmpeg_in.h:#include <libavformat/avformat.h>
modules/redirect_av/ffmpeg_ts_muxer.c:#include <libavformat/avformat.h>

[mf2k (Frank Schima)]

See also #40605 for mpd.

[dbevans (David B. Evans)]

Embedded libs seem hopeless so backported upstream ffmpeg fixes in r111823 plus some dependency and configuration issues.