On Sun, 19 May 2019, Marton Balint wrote:

Fixes a regression introduced in dbfd042983eed8586d4048795c00af820f5b6b1f.

Will apply soon.

Thanks,
Marton


Signed-off-by: Marton Balint <c...@passwd.hu>
---
doc/fftools-common-opts.texi |  5 ++++-
libavformat/utils.c          | 16 +++++++++++-----
2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/doc/fftools-common-opts.texi b/doc/fftools-common-opts.texi
index e75bec4354..4359526f19 100644
--- a/doc/fftools-common-opts.texi
+++ b/doc/fftools-common-opts.texi
@@ -36,7 +36,10 @@ 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. If @var{stream_index} is used as an
additional stream specifier (see below), then it selects stream number
-@var{stream_index} from the matching streams.
+@var{stream_index} from the matching streams. Stream numbering is based on the
+order of the streams as detected by libavformat except when a program ID is
+specified. In this case it is based on the ordering of the streams in the
+program.
@item @var{stream_type}[:@var{additional_stream_specifier}]
@var{stream_type} is one of following: 'v' or 'V' for video, 'a' for audio, 's'
for subtitle, 'd' for data, and 't' for attachments. 'v' matches all video
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 6ef94239a4..3d764c18d6 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -5107,7 +5107,7 @@ AVRational av_guess_frame_rate(AVFormatContext *format, 
AVStream *st, AVFrame *f
 *         >0 if st is a matching stream
 */
static int match_stream_specifier(AVFormatContext *s, AVStream *st,
-                                  const char *spec, const char **indexptr)
+                                  const char *spec, const char **indexptr, 
AVProgram **p)
{
    int match = 1;                      /* Stores if the specifier matches so 
far. */
    while (*spec) {
@@ -5162,6 +5162,8 @@ FF_DISABLE_DEPRECATION_WARNINGS
                    for (j = 0; j < s->programs[i]->nb_stream_indexes; j++) {
                        if (st->index == s->programs[i]->stream_index[j]) {
                            found = 1;
+                            if (p)
+                                *p = s->programs[i];
                            i = s->nb_programs;
                            break;
                        }
@@ -5264,8 +5266,10 @@ int avformat_match_stream_specifier(AVFormatContext *s, 
AVStream *st,
    int ret, index;
    char *endptr;
    const char *indexptr = NULL;
+    AVProgram *p = NULL;
+    int nb_streams;

-    ret = match_stream_specifier(s, st, spec, &indexptr);
+    ret = match_stream_specifier(s, st, spec, &indexptr, &p);
    if (ret < 0)
        goto error;

@@ -5283,11 +5287,13 @@ int avformat_match_stream_specifier(AVFormatContext *s, 
AVStream *st,
        return (index == st->index);

    /* If we requested a matching stream index, we have to ensure st is that. */
-    for (int i = 0; i < s->nb_streams && index >= 0; i++) {
-        ret = match_stream_specifier(s, s->streams[i], spec, NULL);
+    nb_streams = p ? p->nb_stream_indexes : s->nb_streams;
+    for (int i = 0; i < nb_streams && index >= 0; i++) {
+        AVStream *candidate = p ? s->streams[p->stream_index[i]] : 
s->streams[i];
+        ret = match_stream_specifier(s, candidate, spec, NULL, NULL);
        if (ret < 0)
            goto error;
-        if (ret > 0 && index-- == 0 && st == s->streams[i])
+        if (ret > 0 && index-- == 0 && st == candidate)
            return 1;
    }
    return 0;
--
2.16.4

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