Always write VOL control parameters, needed by old xvid patch by (Loren Merritt <lorenm at u dot washington dot edu>)

Originally committed as revision 3432 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h263.c

@@ -2226,14 +2226,10 @@ static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_n
         put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
     }
 
-    if(s->low_delay){
-        put_bits(&s->pb, 1, 1);		/* vol control parameters= yes */
-        put_bits(&s->pb, 2, 1);		/* chroma format YUV 420/YV12 */
-        put_bits(&s->pb, 1, s->low_delay);
-        put_bits(&s->pb, 1, 0);		/* vbv parameters= no */
-    }else{
-        put_bits(&s->pb, 1, 0);		/* vol control parameters= no */
-    }
+    put_bits(&s->pb, 1, 1);		/* vol control parameters= yes */
+    put_bits(&s->pb, 2, 1);		/* chroma format YUV 420/YV12 */
+    put_bits(&s->pb, 1, s->low_delay);
+    put_bits(&s->pb, 1, 0);		/* vbv parameters= no */
 
     put_bits(&s->pb, 2, RECT_SHAPE);	/* vol shape= rectangle */
     put_bits(&s->pb, 1, 1);		/* marker bit */

tests/ffmpeg.regression.ref

@@ -51,20 +51,20 @@ stddev:  7.99 PSNR:30.06 bytes:7602176
 5986168 ./data/a-huffyuv.avi
 799d3db687f6cdd7a837ec156efc171f *./data/out.yuv
 stddev:  0.00 PSNR:99.99 bytes:7602176
-3fd26e006c383314e731eabfd68d4536 *./data/a-mpeg4-rc.avi
-820960 ./data/a-mpeg4-rc.avi
+788092f090eb1b11b78369f83e430fba *./data/a-mpeg4-rc.avi
+820964 ./data/a-mpeg4-rc.avi
 8458b4ddaca643a3ec1264c1ee2f4986 *./data/out.yuv
 stddev: 10.41 PSNR:27.77 bytes:7602176
 7aab4613f634d23b6c66eec7270baaff *./data/a-mpeg4-adv.avi
 600240 ./data/a-mpeg4-adv.avi
 0b7935cee2070f3b838478cea6dc4b3c *./data/out.yuv
 stddev: 10.25 PSNR:27.90 bytes:7602176
-d1fa3d096b339d68200c67a71e710798 *./data/a-mpeg4-thread.avi
+0000cc8c66f88d0e25ecdd63e85e457a *./data/a-mpeg4-thread.avi
 756550 ./data/a-mpeg4-thread.avi
 7e4e2cf2659aa158f5ffed2be45a9c3d *./data/out.yuv
 stddev: 12.31 PSNR:26.31 bytes:7602176
-8d517c0cf195570f6ac08914ed6c07b8 *./data/a-mpeg4-Q.avi
-899508 ./data/a-mpeg4-Q.avi
+545245d3169814f03dad599cac4b9ada *./data/a-mpeg4-Q.avi
+899514 ./data/a-mpeg4-Q.avi
 cdb77818e108eab89c9ac4bcaf350e19 *./data/out.yuv
 stddev:  5.69 PSNR:33.00 bytes:7602176
 f28aea7181f680687ea9522f0066d18a *./data/a-error-mpeg4-adv.avi

tests/rotozoom.regression.ref

@@ -51,20 +51,20 @@ stddev:  5.34 PSNR:33.56 bytes:7602176
 4987020 ./data/a-huffyuv.avi
 dde5895817ad9d219f79a52d0bdfb001 *./data/out.yuv
 stddev:  0.00 PSNR:99.99 bytes:7602176
-ad386d2b05f50bf2b4f922c9970455cb *./data/a-mpeg4-rc.avi
-228092 ./data/a-mpeg4-rc.avi
+e9ce342786f760b8e0a62a8fb2601628 *./data/a-mpeg4-rc.avi
+228094 ./data/a-mpeg4-rc.avi
 764d5da4f1c8eda9bd554179ed1ea283 *./data/out.yuv
 stddev:  4.26 PSNR:35.51 bytes:7602176
 f5e3b1dc7fbfe47fd1354cb620825000 *./data/a-mpeg4-adv.avi
 172538 ./data/a-mpeg4-adv.avi
 49fecc1105d25ff1c2fc9c0d4cb821b0 *./data/out.yuv
 stddev:  4.84 PSNR:34.41 bytes:7602176
-04f280768c952362c366a711f0648b7a *./data/a-mpeg4-thread.avi
-253092 ./data/a-mpeg4-thread.avi
+525aee25f7aed5566ac2a887190cda93 *./data/a-mpeg4-thread.avi
+253098 ./data/a-mpeg4-thread.avi
 da1a5a3301ad2bdf5806a51ffa74d4fb *./data/out.yuv
 stddev:  4.06 PSNR:35.93 bytes:7602176
-7e6d45149272eee543612f117af6e61a *./data/a-mpeg4-Q.avi
-165012 ./data/a-mpeg4-Q.avi
+79204f01954362d779e1e078365d3c31 *./data/a-mpeg4-Q.avi
+165016 ./data/a-mpeg4-Q.avi
 94d8bd3897ac20bb3bef9cf384f9abd0 *./data/out.yuv
 stddev:  4.01 PSNR:36.05 bytes:7602176
 24f27c7781eb2d4f644f031d3f852686 *./data/a-error-mpeg4-adv.avi