[FFmpeg-user] Problem capturing from 64ch SoundFlower on OSX

[Carl Eugen Hoyos]

On Thursday 09 July 2015 06:48:42 pm Piers O'Hanlon wrote:
> Hi,
> I've been trying to capture multiple audio channels using ffmpeg on OSX -
> specifically I've been trying to capture from the Soundflower 64 channel
> input device

Just being curious: Is this hardware or software?

> configuration: --cc=clang

Unrelated: This should make no difference, I suggest to remove it.

> [avfoundation @ 0x7f8dfb83d800] Failed to open codec in av_find_stream_info

This is the relevant error, please test attached patch.

Note that -map_channel is deprecated, please use the pan filter.

Carl Eugen
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diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index cea5355..f3dafc0 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -65,7 +65,7 @@
 #define FF_DEFAULT_QUANT_BIAS 999999
 #endif
 
-#define FF_SANE_NB_CHANNELS 63U
+#define FF_SANE_NB_CHANNELS 64U
 
 #define FF_SIGNBIT(x) ((x) >> CHAR_BIT * sizeof(x) - 1)
 
diff --git a/libavfilter/af_pan.c b/libavfilter/af_pan.c
index 4ba77a7..9117cc0 100644
--- a/libavfilter/af_pan.c
+++ b/libavfilter/af_pan.c
@@ -37,7 +37,7 @@
 #include "formats.h"
 #include "internal.h"
 
-#define MAX_CHANNELS 63
+#define MAX_CHANNELS 64
 
 typedef struct PanContext {
     const AVClass *class;
diff --git a/libswresample/swresample_internal.h b/libswresample/swresample_internal.h
index e36faf1..ce5eef4 100644
--- a/libswresample/swresample_internal.h
+++ b/libswresample/swresample_internal.h
@@ -25,7 +25,7 @@
 #include "libavutil/channel_layout.h"
 #include "config.h"
 
-#define SWR_CH_MAX 32
+#define SWR_CH_MAX 64
 
 #define SQRT3_2      1.22474487139158904909  /* sqrt(3/2) */