avformat/smoothstreaming: Don't write trailer of subcontext

Nothing written in avformat_write_trailer() for the submuxers will be
output anyway because the AVIOContexts used for actual output have been
closed before the call. Writing the trailer of the subcontext has probably
only been done in order to free the memory allocated by the submuxer.
And this job has been taken over by the deinit functions.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavformat/smoothstreamingenc.c

@@ -49,7 +49,6 @@ typedef struct Fragment {
 
 typedef struct OutputStream {
     AVFormatContext *ctx;
-    int ctx_inited;
     char dirname[1024];
     uint8_t iobuf[32768];
     URLContext *out;  // Current output stream where all output is written
@@ -173,8 +172,6 @@ static void ism_free(AVFormatContext *s)
         ffurl_closep(&os->out);
         ffurl_closep(&os->out2);
         ffurl_closep(&os->tail_out);
-        if (os->ctx && os->ctx_inited)
-            av_write_trailer(os->ctx);
         if (os->ctx && os->ctx->pb)
             avio_context_free(&os->ctx->pb);
         avformat_free_context(os->ctx);
@@ -357,7 +354,6 @@ static int ism_write_header(AVFormatContext *s)
         if (ret < 0) {
              goto fail;
         }
-        os->ctx_inited = 1;
         avio_flush(ctx->pb);
         s->streams[i]->time_base = st->time_base;
         if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {