Merge commit 'b0f36a0043d76436cc7ab8ff92ab99c94595d3c0'

* commit 'b0f36a0043d76436cc7ab8ff92ab99c94595d3c0':
  avconv: stop using setpts for input framerate forced with -r

Merged-by: Clément Bœsch <u@pkh.me>

configure

@@ -3192,7 +3192,7 @@ swscale_deps="avutil"
 ffmpeg_deps="avcodec avfilter avformat swresample"
 ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
                null_filter
-               setpts_filter trim_filter"
+               trim_filter"
 ffplay_deps="avcodec avformat swscale swresample sdl2"
 ffplay_libs='$sdl2_libs'
 ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"

ffmpeg.c

@@ -2437,6 +2437,9 @@ static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output, int eo
 
     best_effort_timestamp= av_frame_get_best_effort_timestamp(decoded_frame);
 
+    if (ist->framerate.num)
+        best_effort_timestamp = ist->cfr_next_pts++;
+
     if (eof && best_effort_timestamp == AV_NOPTS_VALUE && ist->nb_dts_buffer > 0) {
         best_effort_timestamp = ist->dts_buffer[0];
 

ffmpeg.h

@@ -316,6 +316,11 @@ typedef struct InputStream {
 
     int64_t min_pts; /* pts with the smallest value in a current stream */
     int64_t max_pts; /* pts with the higher value in a current stream */
+
+    // when forcing constant input framerate through -r,
+    // this contains the pts that will be given to the next decoded frame
+    int64_t cfr_next_pts;
+
     int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
 
     double ts_scale;

ffmpeg_filter.c

@@ -802,23 +802,6 @@ static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
             return ret;
     }
 
-    if (ist->framerate.num) {
-        AVFilterContext *setpts;
-
-        snprintf(name, sizeof(name), "forcecfr_in_%d_%d",
-                 ist->file_index, ist->st->index);
-        if ((ret = avfilter_graph_create_filter(&setpts,
-                                                avfilter_get_by_name("setpts"),
-                                                name, "N", NULL,
-                                                fg->graph)) < 0)
-            return ret;
-
-        if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
-            return ret;
-
-        last_filter = setpts;
-    }
-
     if (do_deinterlace) {
         AVFilterContext *yadif;