https://github.com/ImageMagick/ImageMagick/issues/319

diff --git a/coders/mpeg.c b/coders/mpeg.c
index d8aa6e5cd6d5c14bf0e9b609d1fd5395135cd292..711af2b84ba6cc3480320f5a8c860115d9c3a375 100644 (file)
--- a/coders/mpeg.c
+++ b/coders/mpeg.c
@@ -244,54 +244,63 @@ ModuleExport size_t RegisterMPEGImage(void)
   entry->decoder=(DecodeImageHandler *) ReadMPEGImage;
   entry->magick=(IsImageFormatHandler *) IsAVI;
   entry->flags^=CoderBlobSupportFlag;
+  entry->flags|=CoderSeekableStreamFlag;
   (void) RegisterMagickInfo(entry);
   entry=AcquireMagickInfo("MPEG","MKV","Multimedia Container");
   entry->decoder=(DecodeImageHandler *) ReadMPEGImage;
   entry->encoder=(EncodeImageHandler *) WriteMPEGImage;
   entry->magick=(IsImageFormatHandler *) IsMPEG;
   entry->flags^=CoderBlobSupportFlag;
+  entry->flags|=CoderSeekableStreamFlag;
   (void) RegisterMagickInfo(entry);
   entry=AcquireMagickInfo("MPEG","MOV","MPEG Video Stream");
   entry->decoder=(DecodeImageHandler *) ReadMPEGImage;
   entry->encoder=(EncodeImageHandler *) WriteMPEGImage;
   entry->magick=(IsImageFormatHandler *) IsMPEG;
   entry->flags^=CoderBlobSupportFlag;
+  entry->flags|=CoderSeekableStreamFlag;
   (void) RegisterMagickInfo(entry);
   entry=AcquireMagickInfo("MPEG","MPEG","MPEG Video Stream");
   entry->decoder=(DecodeImageHandler *) ReadMPEGImage;
   entry->encoder=(EncodeImageHandler *) WriteMPEGImage;
   entry->magick=(IsImageFormatHandler *) IsMPEG;
   entry->flags^=CoderBlobSupportFlag;
+  entry->flags|=CoderSeekableStreamFlag;
   (void) RegisterMagickInfo(entry);
   entry=AcquireMagickInfo("MPEG","MPG","MPEG Video Stream");
   entry->decoder=(DecodeImageHandler *) ReadMPEGImage;
   entry->encoder=(EncodeImageHandler *) WriteMPEGImage;
   entry->magick=(IsImageFormatHandler *) IsMPEG;
   entry->flags^=CoderBlobSupportFlag;
+  entry->flags|=CoderSeekableStreamFlag;
   (void) RegisterMagickInfo(entry);
   entry=AcquireMagickInfo("MPEG","MP4","MPEG-4 Video Stream");
   entry->decoder=(DecodeImageHandler *) ReadMPEGImage;
   entry->encoder=(EncodeImageHandler *) WriteMPEGImage;
   entry->magick=(IsImageFormatHandler *) IsMPEG;
   entry->flags^=CoderBlobSupportFlag;
+  entry->flags|=CoderSeekableStreamFlag;
   (void) RegisterMagickInfo(entry);
   entry=AcquireMagickInfo("MPEG","M2V","MPEG Video Stream");
   entry->decoder=(DecodeImageHandler *) ReadMPEGImage;
   entry->encoder=(EncodeImageHandler *) WriteMPEGImage;
   entry->magick=(IsImageFormatHandler *) IsMPEG;
   entry->flags^=CoderBlobSupportFlag;
+  entry->flags|=CoderSeekableStreamFlag;
   (void) RegisterMagickInfo(entry);
   entry=AcquireMagickInfo("MPEG","M4V","Raw MPEG-4 Video");
   entry->decoder=(DecodeImageHandler *) ReadMPEGImage;
   entry->encoder=(EncodeImageHandler *) WriteMPEGImage;
   entry->magick=(IsImageFormatHandler *) IsMPEG;
   entry->flags^=CoderBlobSupportFlag;
+  entry->flags|=CoderSeekableStreamFlag;
   (void) RegisterMagickInfo(entry);
   entry=AcquireMagickInfo("MPEG","WMV","Windows Media Video");
   entry->decoder=(DecodeImageHandler *) ReadMPEGImage;
   entry->encoder=(EncodeImageHandler *) WriteMPEGImage;
   entry->magick=(IsImageFormatHandler *) IsMPEG;
   entry->flags^=CoderBlobSupportFlag;
+  entry->flags|=CoderSeekableStreamFlag;
   (void) RegisterMagickInfo(entry);
   return(MagickImageCoderSignature);
 }