Fix #6945
Rotate or/and flip frame according to frame's metadata orientation
---
fftools/ffmpeg.c| 16 +++-
fftools/ffmpeg.h| 3 ++-
fftools/ffmpeg_filter.c | 28 +++-
3 files changed, 40 insertions(+), 7 deletions(-)
diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 01f04103cf..2f4229a9d0 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -2126,6 +2126,19 @@ static int ifilter_has_all_input_formats(FilterGraph *fg)
return 1;
}
+static int orientation_need_update(InputFilter *ifilter, AVFrame *frame)
+{
+int orientaion = get_frame_orientation(frame);
+int filterst = ifilter->orientation <= 1 ? 0 : // not set
+ ifilter->orientation <= 4 ? 1 : // auto flip
+ 2; // auto transpose
+int framest = orientaion <= 1 ? 0 : // not set
+ orientaion <= 4 ? 1 : // auto flip
+ 2; // auto transpose
+
+return filterst != framest;
+}
+
static int ifilter_send_frame(InputFilter *ifilter, AVFrame *frame)
{
FilterGraph *fg = ifilter->graph;
@@ -2142,7 +2155,8 @@ static int ifilter_send_frame(InputFilter *ifilter,
AVFrame *frame)
break;
case AVMEDIA_TYPE_VIDEO:
need_reinit |= ifilter->width != frame->width ||
- ifilter->height != frame->height;
+ ifilter->height != frame->height ||
+ orientation_need_update(ifilter, frame);
break;
}
diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index 7b6f802082..64278b6ab1 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -244,7 +244,7 @@ typedef struct InputFilter {
// parameters configured for this input
int format;
-int width, height;
+int width, height, orientation;
AVRational sample_aspect_ratio;
int sample_rate;
@@ -649,6 +649,7 @@ int init_complex_filtergraph(FilterGraph *fg);
void sub2video_update(InputStream *ist, AVSubtitle *sub);
int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
+int get_frame_orientation(const AVFrame* frame);
int ffmpeg_parse_options(int argc, char **argv);
diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 72838de1e2..1fcadb1871 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -743,6 +743,18 @@ static int sub2video_prepare(InputStream *ist, InputFilter
*ifilter)
return 0;
}
+int get_frame_orientation(const AVFrame *frame)
+{
+AVDictionaryEntry *entry = NULL;
+int orientation = 0;
+
+// read exif orientation data
+entry = av_dict_get(frame->metadata, "Orientation", NULL, 0);
+if (entry && entry->value)
+orientation = atoi(entry->value);
+return orientation;
+}
+
static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
AVFilterInOut *in)
{
@@ -809,13 +821,18 @@ static int configure_input_video_filter(FilterGraph *fg,
InputFilter *ifilter,
if (ist->autorotate) {
double theta = get_rotation(ist->st);
-if (fabs(theta - 90) < 1.0) {
+if (fabs(theta) < 1.0) { // no rotation info in stream meta
+if (ifilter->orientation < 0 || ifilter->orientation > 8) {
+av_log(NULL, AV_LOG_ERROR, "Invalid frame orientation: %i\n",
ifilter->orientation);
+} else if (ifilter->orientation > 1 && ifilter->orientation <= 4)
{ // skip 0 (not set) and 1 (orientaion 'Normal')
+ret = insert_filter(_filter, _idx, "transpose",
"orientation=auto_flip");
+} else if (ifilter->orientation > 4) {
+ret = insert_filter(_filter, _idx, "transpose",
"orientation=auto_transpose");
+}
+} else if (fabs(theta - 90) < 1.0) {
ret = insert_filter(_filter, _idx, "transpose", "clock");
} else if (fabs(theta - 180) < 1.0) {
-ret = insert_filter(_filter, _idx, "hflip", NULL);
-if (ret < 0)
-return ret;
-ret = insert_filter(_filter, _idx, "vflip", NULL);
+ret = insert_filter(_filter, _idx, "transpose",
"orientation=rotate180");
} else if (fabs(theta - 270) < 1.0) {
ret = insert_filter(_filter, _idx, "transpose", "cclock");
} else if (fabs(theta) > 1.0) {
@@ -1191,6 +1208,7 @@ int ifilter_parameters_from_frame(InputFilter *ifilter,
const AVFrame *frame)
ifilter->width = frame->width;
ifilter->height = frame->height;
ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
+ifilter->orientation = get_frame_orientation(frame);
ifilter->sample_rate = frame->sample_rate;
ifilter->channels= frame->channels;
--
2.17.1
___
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link