avconv: add support for copying attachments.

avconv.c

@@ -1991,6 +1991,7 @@ static int transcode_init(OutputFile *output_files,
                 codec->height = icodec->height;
                 break;
             case AVMEDIA_TYPE_DATA:
+            case AVMEDIA_TYPE_ATTACHMENT:
                 break;
             default:
                 abort();
@@ -3160,6 +3161,13 @@ static OutputStream *new_data_stream(OptionsContext *o, AVFormatContext *oc)
     return ost;
 }
 
+static OutputStream *new_attachment_stream(OptionsContext *o, AVFormatContext *oc)
+{
+    OutputStream *ost = new_output_stream(o, oc, AVMEDIA_TYPE_ATTACHMENT);
+    ost->st->stream_copy = 1;
+    return ost;
+}
+
 static OutputStream *new_subtitle_stream(OptionsContext *o, AVFormatContext *oc)
 {
     AVStream *st;
@@ -3375,6 +3383,7 @@ static void opt_output_file(void *optctx, const char *filename)
             case AVMEDIA_TYPE_AUDIO:    ost = new_audio_stream(o, oc);    break;
             case AVMEDIA_TYPE_SUBTITLE: ost = new_subtitle_stream(o, oc); break;
             case AVMEDIA_TYPE_DATA:     ost = new_data_stream(o, oc);     break;
+            case AVMEDIA_TYPE_ATTACHMENT: ost = new_attachment_stream(o, oc); break;
             default:
                 av_log(NULL, AV_LOG_FATAL, "Cannot map stream #%d.%d - unsupported type.\n",
                        map->file_index, map->stream_index);

cmdutils.c

@@ -858,7 +858,7 @@ int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
 {
     if (*spec <= '9' && *spec >= '0')                                        /* opt:index */
         return strtol(spec, NULL, 0) == st->index;
-    else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd') { /* opt:[vasd] */
+    else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' || *spec == 't') { /* opt:[vasdt] */
         enum AVMediaType type;
 
         switch (*spec++) {
@@ -866,6 +866,7 @@ int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
         case 'a': type = AVMEDIA_TYPE_AUDIO;    break;
         case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
         case 'd': type = AVMEDIA_TYPE_DATA;     break;
+        case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
         }
         if (type != st->codec->codec_type)
             return 0;

doc/avtools-common-opts.texi

@@ -33,9 +33,10 @@ Possible forms of stream specifiers are:
 Matches the stream with this index. E.g. @code{-threads:1 4} would set the
 thread count for the second stream to 4.
 @item @var{stream_type}[:@var{stream_index}]
-@var{stream_type} is one of: 'v' for video, 'a' for audio, 's' for subtitle and
+@var{stream_type} is one of: 'v' for video, 'a' for audio, 's' for subtitle,
-'d' for data. If @var{stream_index} is given, then matches stream number
+'d' for data and 't' for attachments. If @var{stream_index} is given, then
-@var{stream_index} of this type. Otherwise matches all streams of this type.
+matches stream number @var{stream_index} of this type. Otherwise matches all
+streams of this type.
 @item @var{program_id}[:@var{stream_index}]
 If @var{stream_index} is given, then matches stream number @var{stream_index} in
 program with id @var{program_id}. Otherwise matches all streams in this program.