movenc: create an alternate group for each media type

Partially fixes bug 44.

libavformat/movenc.c

@@ -1216,7 +1216,8 @@ static int mov_write_tkhd_tag(AVIOContext *pb, MOVTrack *track, AVStream *st)
 
     avio_wb32(pb, 0); /* reserved */
     avio_wb32(pb, 0); /* reserved */
-    avio_wb32(pb, 0x0); /* reserved (Layer & Alternate group) */
+    avio_wb16(pb, 0); /* layer */
+    avio_wb16(pb, st->codec->codec_type); /* alternate group) */
     /* Volume, only for audio */
     if(track->enc->codec_type == AVMEDIA_TYPE_AUDIO)
         avio_wb16(pb, 0x0100);

tests/ref/acodec/alac

@@ -1,4 +1,4 @@
-c68f649777ab8e7c9a0f1f221451d3ad *./tests/data/acodec/alac.m4a
+b25bcc7ec3f5c19cdfc01a6bbd32edb8 *./tests/data/acodec/alac.m4a
 389386 ./tests/data/acodec/alac.m4a
 95e54b261530a1bcf6de6fe3b21dc5f6 *./tests/data/alac.acodec.out.wav
 stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400

tests/ref/acodec/pcm

@@ -6,7 +6,7 @@ f443a8eeb1647ec1eeb8370c939e52d4 *./tests/data/acodec/pcm_mulaw.wav
 529256 ./tests/data/acodec/pcm_mulaw.wav
 1c3eeaa8814ebd4916780dff80ed6dc5 *./tests/data/pcm.acodec.out.wav
 stddev:  103.38 PSNR: 56.04 MAXDIFF:  644 bytes:  1058400/  1058400
-b7936d7170e0efefb379349d81aed360 *./tests/data/acodec/pcm_s8.mov
+760f85fb9f4e8aba326fb44ae84c9507 *./tests/data/acodec/pcm_s8.mov
 530837 ./tests/data/acodec/pcm_s8.mov
 652edf30f35ad89bf27bcc9d2f9c7b53 *./tests/data/pcm.acodec.out.wav
 stddev:  147.89 PSNR: 52.93 MAXDIFF:  255 bytes:  1058400/  1058400
@@ -14,7 +14,7 @@ stddev:  147.89 PSNR: 52.93 MAXDIFF:  255 bytes:  1058400/  1058400
 529244 ./tests/data/acodec/pcm_u8.wav
 652edf30f35ad89bf27bcc9d2f9c7b53 *./tests/data/pcm.acodec.out.wav
 stddev:  147.89 PSNR: 52.93 MAXDIFF:  255 bytes:  1058400/  1058400
-c42b9c04305455250366c84e17c1023f *./tests/data/acodec/pcm_s16be.mov
+a4e18d1ca9ef5b8132a84d43625ddc47 *./tests/data/acodec/pcm_s16be.mov
 1060037 ./tests/data/acodec/pcm_s16be.mov
 95e54b261530a1bcf6de6fe3b21dc5f6 *./tests/data/pcm.acodec.out.wav
 stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400
@@ -30,7 +30,7 @@ c4f51bf32fad2f7af8ea5beedb56168b *./tests/data/acodec/pcm_s16le.mkv
 1060638 ./tests/data/acodec/pcm_s16le.mkv
 95e54b261530a1bcf6de6fe3b21dc5f6 *./tests/data/pcm.acodec.out.wav
 stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400
-07ffe7ffb78f3648b6524debdde5aec1 *./tests/data/acodec/pcm_s24be.mov
+971d2d2633e41a0326fe2d04a2d0350f *./tests/data/acodec/pcm_s24be.mov
 1589237 ./tests/data/acodec/pcm_s24be.mov
 95e54b261530a1bcf6de6fe3b21dc5f6 *./tests/data/pcm.acodec.out.wav
 stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400
@@ -38,7 +38,7 @@ a85380fb79b0d4fff38e24ac1e34bb94 *./tests/data/acodec/pcm_s24le.wav
 1587668 ./tests/data/acodec/pcm_s24le.wav
 95e54b261530a1bcf6de6fe3b21dc5f6 *./tests/data/pcm.acodec.out.wav
 stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400
-d7792f0343cd66fda8b50b569e2bcc48 *./tests/data/acodec/pcm_s32be.mov
+fc4f4e3e195bbde037ed31021d229f12 *./tests/data/acodec/pcm_s32be.mov
 2118437 ./tests/data/acodec/pcm_s32be.mov
 95e54b261530a1bcf6de6fe3b21dc5f6 *./tests/data/pcm.acodec.out.wav
 stddev:    0.00 PSNR:999.99 MAXDIFF:    0 bytes:  1058400/  1058400

tests/ref/lavf/mov

@@ -1,3 +1,3 @@
-439684b82ccc1fdd24a23392c238ae53 *./tests/data/lavf/lavf.mov
+4a3ad13f0355cb5d119109778d555207 *./tests/data/lavf/lavf.mov
 357681 ./tests/data/lavf/lavf.mov
 ./tests/data/lavf/lavf.mov CRC=0x2f6a9b26