updated README

README.md

@@ -3,7 +3,7 @@ ffmpeg-tutorial
 
 This repository contains files from an FFmpeg tutorial originally written by
 Stephen Dranger (dranger@gmail.com).  The files have been updated to work with
-the most recent version of FFmpeg (N-42806-gf4451d2 at the time of writing).
+the most recent version of FFmpeg (N-48241-g9e04e11 at the time of writing).
 The updates were performed with an effort to modify as little code as possible,
 so that the original code and tutorial descriptions could be easily consulted.
 
@@ -16,10 +16,10 @@ Main changes:
 * Renamed includes, e.g. ffmpeg/avcodec.h --> libavcodec/avcodec.h
 * Work around deprecated functions and symbols (see below)
 * Initializing pointers to NULL on declaration.  Some FFmpeg functions
-  (e.g. avformat_open_input) now segfault when given uninitialized pointers as
+  (e.g. avformat\_open\_input) now segfault when given uninitialized pointers as
   input.
 * Removed tutorial08.c, which introduced software scaling (as
-  opposed to using the img_convert method).  img_convert has been deprecated
+  opposed to using the img\_convert method).  img\_convert has been deprecated
   and is no longer available, so these new tutorials use software scaling
   from the very beginning, and a separate tutorial is not necessary.
 
@@ -28,24 +28,24 @@ Deprecated Functions and Symbols
 
 This section describes the changes made to work around deprecated functions
 and symbols, in the format: before --> after.  In some cases, a simple rename
-sufficed (e.g. dump_format), but in others, more significant changes to the
-code were required (e.g. avcodec_decode_audio2).  Consult the diffs for each
+sufficed (e.g. dump\_format), but in others, more significant changes to the
+code were required (e.g. avcodec\_decode\_audio2).  Consult the diffs for each
 respective tutorial to see exactly what has changed since the original 
 version of the tutorial.
 
-* av_open_input_file --> avformat_open_input
-* av_find_stream_info --> avformat_find_stream_info
-* dump_format --> av_dump_format
-* CODEC_TYPE_VIDEO --> AVMEDIA_TYPE_VIDEO
-* avcodec_open --> avcodec_open2
-* avcodec_decode_video --> avcodec_decode_video2
-* img_convert --> sws_scale
-* av_close_input_file --> avformat_close_input
-* avcodec_decode_audio2 --> avcodec_decode_audio4
-* CODEC_TYPE_AUDIO --> AVMEDIA_TYPE_AUDIO
-* url_set_interrupt_cb --> avio_open2
-* url_ferror --> check attribute is->pFormatCtx->pb->error
-* pstrcpy --> av_strlcpy
+* av\_open\_input\_file --> avformat\_open\_input
+* av\_find\_stream\_info --> avformat\_find\_stream\_info
+* dump\_format --> av\_dump\_format
+* CODEC\_TYPE\_VIDEO --> AVMEDIA\_TYPE\_VIDEO
+* avcodec\_open --> avcodec\_open2
+* avcodec\_decode\_video --> avcodec\_decode\_video2
+* img\_convert --> sws\_scale
+* av\_close\_input\_file --> avformat\_close\_input
+* avcodec\_decode\_audio2 --> avcodec\_decode\_audio4
+* CODEC\_TYPE\_AUDIO --> AVMEDIA\_TYPE\_AUDIO
+* url\_set\_interrupt\_cb --> avio\_open2
+* url\_ferror --> check attribute is->pFormatCtx->pb->error
+* pstrcpy --> av\_strlcpy
 
 Building and Running
 --------------------
@@ -59,6 +59,7 @@ To build the tutorials:
     cd ffmpeg-tutorial
     make
 
-To run a tutorial:
+To run a tutorial, first make sure that your ffmpeg installation is on your
+$LD\_LIBRARY\_PATH and then:
 
-    bin/tutorial01.out
+    bin/tutorial01.out