avconv: make -aspect work with streamcopy

avconv.c

@@ -1490,6 +1490,7 @@ static int transcode_init(void)
         }
 
         if (ost->stream_copy) {
+            AVRational sar;
             uint64_t extra_size;
 
             av_assert0(ist && !ost->filter);
@@ -1547,13 +1548,13 @@ static int transcode_init(void)
                 codec->width              = icodec->width;
                 codec->height             = icodec->height;
                 codec->has_b_frames       = icodec->has_b_frames;
-                if (!codec->sample_aspect_ratio.num) {
-                    codec->sample_aspect_ratio   =
-                    ost->st->sample_aspect_ratio =
-                        ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
-                        ist->st->codec->sample_aspect_ratio.num ?
-                        ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
-                }
+                if (ost->frame_aspect_ratio)
+                    sar = av_d2q(ost->frame_aspect_ratio * codec->height / codec->width, 255);
+                else if (ist->st->sample_aspect_ratio.num)
+                    sar = ist->st->sample_aspect_ratio;
+                else
+                    sar = icodec->sample_aspect_ratio;
+                ost->st->sample_aspect_ratio = codec->sample_aspect_ratio = sar;
                 break;
             case AVMEDIA_TYPE_SUBTITLE:
                 codec->width  = icodec->width;

avconv_opt.c

@@ -983,15 +983,20 @@ static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc)
     AVStream *st;
     OutputStream *ost;
     AVCodecContext *video_enc;
+    char *frame_aspect_ratio = NULL;
 
     ost = new_output_stream(o, oc, AVMEDIA_TYPE_VIDEO);
     st  = ost->st;
     video_enc = st->codec;
 
+    MATCH_PER_STREAM_OPT(frame_aspect_ratios, str, frame_aspect_ratio, oc, st);
+    if (frame_aspect_ratio)
+        ost->frame_aspect_ratio = parse_frame_aspect_ratio(frame_aspect_ratio);
+
     if (!ost->stream_copy) {
         const char *p = NULL;
         char *frame_rate = NULL, *frame_size = NULL;
-        char *frame_aspect_ratio = NULL, *frame_pix_fmt = NULL;
+        char *frame_pix_fmt = NULL;
         char *intra_matrix = NULL, *inter_matrix = NULL;
         int do_pass = 0;
         int i;
@@ -1008,10 +1013,6 @@ static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc)
             exit(1);
         }
 
-        MATCH_PER_STREAM_OPT(frame_aspect_ratios, str, frame_aspect_ratio, oc, st);
-        if (frame_aspect_ratio)
-            ost->frame_aspect_ratio = parse_frame_aspect_ratio(frame_aspect_ratio);
-
         MATCH_PER_STREAM_OPT(frame_pix_fmts, str, frame_pix_fmt, oc, st);
         if (frame_pix_fmt && (video_enc->pix_fmt = av_get_pix_fmt(frame_pix_fmt)) == AV_PIX_FMT_NONE) {
             av_log(NULL, AV_LOG_FATAL, "Unknown pixel format requested: %s.\n", frame_pix_fmt);