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franzrogar

Member

From: Spain

Registered: 2010-03-26

Posts: 40

[SOLVED] Audacity don't reconize FFMpeg

Hello,

I've been trying unsatisfactorily open an AC3 file in Audacity to change framerate. It just complain it can't be open. If I clic on help... it says it's a "wma-proprietary" which is not.

I've tried with audacity+ffmpeg (from extra), audacity-svn+ffmpeg (from aur), audacity+ffmpeg-mt-git, etc. (recompiling when ffmpeg pkg change, of course) and no version is able to open it.

Even, if I select libavformat in Audacity preferences dialog, it just keep sayin' that ffmpeg lib can't be found even when it's there.

The only info in terminal audacity sputs is:

Expression 'stream->capture.pcm' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3653

Apart from that, nothing else.

Do you know a working version? Or is there any other program to change framerate (from PAL to NTSC) without changin' pitch?

Thanks you very much

Last edited by franzrogar (2010-04-17 10:50:59)

---

Franz Rogar
MOTM : "Quis custodiet ipsos custodes?"

franzrogar

Member

From: Spain

Registered: 2010-03-26

Posts: 40

Re: [SOLVED] Audacity don't reconize FFMpeg

I found the issue: newer ffmpeg changed "match_ext" to "av_match_ext".

So, ffmpeg-mt-git and audacity-cvs works with a patch.

In audacity forum, assem046 posted the patch. Well, it needs to fix some misplacements but it's easy to adapt to current CVS.

This' the patch adapted for current audacity-cvs (apply at $srcdir/$_cvsmod-build/src):

--- FFmpeg.cpp.original    2010-04-14 14:59:48.000000000 +0200
+++ FFmpeg.cpp    2010-04-14 15:25:52.136755669 +0200
@@ -341,7 +341,7 @@
          }
          // Otherwize, resort to extension matching if available
          else if (fmt1->extensions) {
-            if (FFmpegLibsInst->match_ext(filename, fmt1->extensions)) {
+            if (FFmpegLibsInst->av_match_ext(filename, fmt1->extensions)) {
                score = 50;
             }
          }
@@ -814,7 +814,7 @@
    INITDYN(avformat,av_open_input_file);
    INITDYN(avformat,av_open_input_stream);
    INITDYN(avformat,get_buffer);
-   INITDYN(avformat,match_ext);
+   INITDYN(avformat,av_match_ext);
 
 #if FFMPEG_STABLE
    INITDYN(avformat,av_init_packet);
--- FFmpeg.h.original    2010-04-14 14:59:48.000000000 +0200
+++ FFmpeg.h    2010-04-14 15:26:39.932590241 +0200
@@ -222,7 +222,7 @@
    AVStream*         (*av_new_stream)                 (AVFormatContext *s, int id);
    AVFormatContext*  (*av_alloc_format_context)       (void);
    AVOutputFormat*   (*guess_format)                  (const char *short_name, const char *filename, const char *mime_type);
-   int               (*match_ext)                     (const char *filename, const char *extensions);
+   int               (*av_match_ext)                     (const char *filename, const char *extensions);
    int               (*av_write_trailer)              (AVFormatContext *s);
    int               (*av_interleaved_write_frame)    (AVFormatContext *s, AVPacket *pkt);
    int               (*av_write_frame)                (AVFormatContext *s, AVPacket *pkt);

---

Franz Rogar
MOTM : "Quis custodiet ipsos custodes?"

wonder

Developer

From: Bucharest, Romania

Registered: 2006-07-05

Posts: 5,941

Website

Re: [SOLVED] Audacity don't reconize FFMpeg

please report this on our bugtracker to get implemented in our audacity package.

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Give what you have. To someone, it may be better than you dare to think.

franzrogar

Member

From: Spain

Registered: 2010-03-26

Posts: 40

Re: [SOLVED] Audacity don't reconize FFMpeg

reported.

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Franz Rogar
MOTM : "Quis custodiet ipsos custodes?"