[FFmpeg-cvslog] ffmpeg: Print a warning when -frames is affecting non video frames

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Apr  7 22:13:58 2013 +0200| [4bcb75cc48be18341919f86ce26fa1f4db624f67] | committer: Michael Niedermayer

ffmpeg: Print a warning when -frames is affecting non video frames

Fixes Ticket2395

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4bcb75cc48be18341919f86ce26fa1f4db624f67
---

 ffmpeg_opt.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ffmpeg_opt.c b/ffmpeg_opt.c
index 63a238d..1f4d89e 100644
--- a/ffmpeg_opt.c
+++ b/ffmpeg_opt.c
@@ -972,6 +972,7 @@ static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, e
     char *bsf = NULL, *next, *codec_tag = NULL;
     AVBitStreamFilterContext *bsfc, *bsfc_prev = NULL;
     double qscale = -1;
+    int i;
 
     if (!st) {
         av_log(NULL, AV_LOG_FATAL, "Could not alloc stream.\n");
@@ -1030,6 +1031,13 @@ static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, e
 
     ost->max_frames = INT64_MAX;
     MATCH_PER_STREAM_OPT(max_frames, i64, ost->max_frames, oc, st);
+    for (i = 0; i<o->nb_max_frames; i++) {
+        char *p = o->max_frames[i].specifier;
+        if (!*p && type != AVMEDIA_TYPE_VIDEO) {
+            av_log(NULL, AV_LOG_WARNING, "Applying unspecific -frames to non video streams, maybe you meant -vframes ?\n");
+            break;
+        }
+    }
 
     ost->copy_prior_start = -1;
     MATCH_PER_STREAM_OPT(copy_prior_start, i, ost->copy_prior_start, oc ,st);