[FFmpeg-cvslog] ffmpeg: move field order decision making to encoder initialization

[Jan Ekström]

ffmpeg | branch: master | Jan Ekström <jeebjp at gmail.com> | Sun Sep 20 21:00:52 2020 +0300| [fbb44bc51a647862eb05ae3f9d7d49a0be9bed57] | committer: Jan Ekström

ffmpeg: move field order decision making to encoder initialization

We now have the possibility of getting AVFrames here, and we should
not touch the muxer's codecpar after writing the header.

Results of FATE tests change as the MXF and Matroska muxers actually
write down the field/frame coding type of a stream in their
respective headers. Before this change, these values in codecpar
would only be set after the muxer was initialized. Now, the
information is also available for encoder and muxer initialization.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fbb44bc51a647862eb05ae3f9d7d49a0be9bed57
---

 fftools/ffmpeg.c                                   | 27 +++++++++++-----------
 .../ref/fate/concat-demuxer-extended-lavf-mxf_d10  |  2 +-
 tests/ref/fate/concat-demuxer-simple1-lavf-mxf_d10 |  2 +-
 tests/ref/fate/rgb24-mkv                           |  4 ++--
 tests/ref/lavf/mxf_d10                             |  2 +-
 5 files changed, 19 insertions(+), 18 deletions(-)

diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 20d191bcf6..788cf9c665 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -1123,7 +1123,6 @@ static void do_video_out(OutputFile *of,
     int ret, format_video_sync;
     AVPacket pkt;
     AVCodecContext *enc = ost->enc_ctx;
-    AVCodecParameters *mux_par = ost->st->codecpar;
     AVRational frame_rate;
     int nb_frames, nb0_frames, i;
     double delta, delta0;
@@ -1285,18 +1284,6 @@ static void do_video_out(OutputFile *of,
         if (!check_recording_time(ost))
             return;
 
-        if (enc->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) &&
-            ost->top_field_first >= 0)
-            in_picture->top_field_first = !!ost->top_field_first;
-
-        if (in_picture->interlaced_frame) {
-            if (enc->codec->id == AV_CODEC_ID_MJPEG)
-                mux_par->field_order = in_picture->top_field_first ? AV_FIELD_TT:AV_FIELD_BB;
-            else
-                mux_par->field_order = in_picture->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
-        } else
-            mux_par->field_order = AV_FIELD_PROGRESSIVE;
-
         in_picture->quality = enc->global_quality;
         in_picture->pict_type = 0;
 
@@ -3433,6 +3420,20 @@ static int init_output_stream_encode(OutputStream *ost, AVFrame *frame)
             enc_ctx->field_order = AV_FIELD_TT;
         }
 
+        if (frame) {
+            if (enc_ctx->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) &&
+                ost->top_field_first >= 0)
+                frame->top_field_first = !!ost->top_field_first;
+
+            if (frame->interlaced_frame) {
+                if (enc_ctx->codec->id == AV_CODEC_ID_MJPEG)
+                    enc_ctx->field_order = frame->top_field_first ? AV_FIELD_TT:AV_FIELD_BB;
+                else
+                    enc_ctx->field_order = frame->top_field_first ? AV_FIELD_TB:AV_FIELD_BT;
+            } else
+                enc_ctx->field_order = AV_FIELD_PROGRESSIVE;
+        }
+
         if (ost->forced_keyframes) {
             if (!strncmp(ost->forced_keyframes, "expr:", 5)) {
                 ret = av_expr_parse(&ost->forced_keyframes_pexpr, ost->forced_keyframes+5,
diff --git a/tests/ref/fate/concat-demuxer-extended-lavf-mxf_d10 b/tests/ref/fate/concat-demuxer-extended-lavf-mxf_d10
index e3e76f217a..f6efc00ca4 100644
--- a/tests/ref/fate/concat-demuxer-extended-lavf-mxf_d10
+++ b/tests/ref/fate/concat-demuxer-extended-lavf-mxf_d10
@@ -1 +1 @@
-d66177ea3922692bc91cd0f8aa907650 *tests/data/fate/concat-demuxer-extended-lavf-mxf_d10.ffprobe
+84496cfe2d668db395280ea67e5c6fbe *tests/data/fate/concat-demuxer-extended-lavf-mxf_d10.ffprobe
diff --git a/tests/ref/fate/concat-demuxer-simple1-lavf-mxf_d10 b/tests/ref/fate/concat-demuxer-simple1-lavf-mxf_d10
index 79ce1e2306..8f3f2e5265 100644
--- a/tests/ref/fate/concat-demuxer-simple1-lavf-mxf_d10
+++ b/tests/ref/fate/concat-demuxer-simple1-lavf-mxf_d10
@@ -78,5 +78,5 @@ video|0|34|1.360000|34|1.360000|1|0.040000|N/A|N/A|150000|1924096|K_|1
 Strings Metadata
 audio|1|65280|1.360000|65280|1.360000|1920|0.040000|N/A|N/A|7680|2074624|K_|1
 Strings Metadata
-0|mpeg2video|0|video|1/25|[0][0][0][0]|0x0000|720|608|0|0|0|0|1:1|45:38|yuv422p|5|tv|unknown|unknown|unknown|topleft|tt|N/A|1|N/A|25/1|25/1|1/25|0|0.000000|N/A|N/A|30000000|N/A|N/A|N/A|N/A|35|0|0|0|0|0|0|0|0|0|0|0|0|0x060A2B340101010501010D001300000000000000000000000000000000000001
+0|mpeg2video|0|video|1/25|[0][0][0][0]|0x0000|720|608|0|0|0|0|1:1|45:38|yuv422p|5|tv|unknown|unknown|unknown|topleft|tb|N/A|1|N/A|25/1|25/1|1/25|0|0.000000|N/A|N/A|30000000|N/A|N/A|N/A|N/A|35|0|0|0|0|0|0|0|0|0|0|0|0|0x060A2B340101010501010D001300000000000000000000000000000000000001
 1|pcm_s16le|unknown|audio|1/48000|[0][0][0][0]|0x0000|s16|48000|2|unknown|16|N/A|0/0|0/0|1/48000|0|0.000000|N/A|N/A|1536000|N/A|N/A|N/A|N/A|35|0|0|0|0|0|0|0|0|0|0|0|0|0x060A2B340101010501010D001300000000000000000000000000000000000001
diff --git a/tests/ref/fate/rgb24-mkv b/tests/ref/fate/rgb24-mkv
index 34d028cbfd..3b14cd0ef0 100644
--- a/tests/ref/fate/rgb24-mkv
+++ b/tests/ref/fate/rgb24-mkv
@@ -1,5 +1,5 @@
-fdc02d700dbe99315a9f0d928a9b935e *tests/data/fate/rgb24-mkv.matroska
-58213 tests/data/fate/rgb24-mkv.matroska
+fde8903c4df0ba8235dafcfd8a2f368c *tests/data/fate/rgb24-mkv.matroska
+58216 tests/data/fate/rgb24-mkv.matroska
 #tb 0: 1/10
 #media_type 0: video
 #codec_id 0: rawvideo
diff --git a/tests/ref/lavf/mxf_d10 b/tests/ref/lavf/mxf_d10
index 85e337d157..30701619e0 100644
--- a/tests/ref/lavf/mxf_d10
+++ b/tests/ref/lavf/mxf_d10
@@ -1,3 +1,3 @@
-36fc2a640368f6d33987d2b2d39df966 *tests/data/lavf/lavf.mxf_d10
+da0ebbebb50a530b14c0f06017f464b3 *tests/data/lavf/lavf.mxf_d10
 5332013 tests/data/lavf/lavf.mxf_d10
 tests/data/lavf/lavf.mxf_d10 CRC=0x6c74d488