From cc1cc2c65e7b776433791adea932e0ea9b1cfd42 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Mon, 13 Dec 2021 15:13:37 +0100
Subject: [PATCH] fftools/ffmpeg: move closing the file into of_write_trailer()

The current code postpones closing the files until after printing the
final report, which accesses the output file size. Deal with this by
storing the final file size before closing the file.
---
 fftools/ffmpeg.c     | 13 -------------
 fftools/ffmpeg_mux.c | 16 +++++++++++++++-
 2 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index b93b453e05..a2b8fa99b9 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -4312,7 +4312,6 @@ static int transcode_step(void)
 static int transcode(void)
 {
     int ret, i;
-    AVFormatContext *os;
     OutputStream *ost;
     InputStream *ist;
     int64_t timer_start;
@@ -4381,18 +4380,6 @@ static int transcode(void)
     /* dump report by using the first video and audio streams */
     print_report(1, timer_start, av_gettime_relative());
 
-    /* close the output files */
-    for (i = 0; i < nb_output_files; i++) {
-        os = output_files[i]->ctx;
-        if (os && os->oformat && !(os->oformat->flags & AVFMT_NOFILE)) {
-            if ((ret = avio_closep(&os->pb)) < 0) {
-                av_log(NULL, AV_LOG_ERROR, "Error closing file %s: %s\n", os->url, av_err2str(ret));
-                if (exit_on_error)
-                    exit_program(1);
-            }
-        }
-    }
-
     /* close each encoder */
     for (i = 0; i < nb_output_streams; i++) {
         ost = output_streams[i];
diff --git a/fftools/ffmpeg_mux.c b/fftools/ffmpeg_mux.c
index 396e91184b..78395bebb4 100644
--- a/fftools/ffmpeg_mux.c
+++ b/fftools/ffmpeg_mux.c
@@ -35,6 +35,7 @@
 struct Muxer {
     /* filesize limit expressed in bytes */
     int64_t limit_filesize;
+    int64_t final_filesize;
     int header_written;
 };
 
@@ -304,6 +305,17 @@ int of_write_trailer(OutputFile *of)
         return ret;
     }
 
+    of->mux->final_filesize = of_filesize(of);
+
+    if (!(of->format->flags & AVFMT_NOFILE)) {
+        ret = avio_closep(&of->ctx->pb);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error closing file %s: %s\n",
+                   of->ctx->url, av_err2str(ret));
+            return ret;
+        }
+    }
+
     return 0;
 }
 
@@ -360,7 +372,9 @@ int64_t of_filesize(OutputFile *of)
     AVIOContext *pb = of->ctx->pb;
     int64_t ret = -1;
 
-    if (pb) {
+    if (of->mux->final_filesize)
+        ret = of->mux->final_filesize;
+    else if (pb) {
         ret = avio_size(pb);
         if (ret <= 0) // FIXME improve avio_size() so it works with non seekable output too
             ret = avio_tell(pb);