h264: Allow stream and container cropping at the same time

The container cropping is applied only when difference is within 16
pixels, and the smallest value between the two is chosen.

Bug-Id: 383
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

libavcodec/h264_slice.c

@@ -896,13 +896,10 @@ static int init_dimensions(H264Context *h)
 {
     int width  = h->width  - (h->sps.crop_right + h->sps.crop_left);
     int height = h->height - (h->sps.crop_top   + h->sps.crop_bottom);
-    int crop_present = h->sps.crop_left  || h->sps.crop_top ||
-                       h->sps.crop_right || h->sps.crop_bottom;
 
     /* handle container cropping */
-    if (!crop_present &&
-        FFALIGN(h->avctx->width,  16) == h->width &&
-        FFALIGN(h->avctx->height, 16) == h->height) {
+    if (FFALIGN(h->avctx->width,  16) == FFALIGN(width,  16) &&
+        FFALIGN(h->avctx->height, 16) == FFALIGN(height, 16)) {
         width  = h->avctx->width;
         height = h->avctx->height;
     }