On Tue, 26 Nov 2024, Manuel Lauss wrote:
SMUSH ANIM files with subversion 2 provide additional fields for
framerate and samplerate, use them if available, otherwise
default to 12 fps which is the default for almost all ANIMv2
since 1995.
Fixes the too-fast playback of test files from LucasArts games
released 1995-1997. It was not noticed since Audio for
those isn't decoded by ffmpeg.
Signed-off-by: Manuel Lauss <[email protected]>
---
libavformat/smush.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
Thanks, applied a slightly modified version.
Regards,
Marton
diff --git a/libavformat/smush.c b/libavformat/smush.c
index 0877f7faff..25730e5816 100644
--- a/libavformat/smush.c
+++ b/libavformat/smush.c
@@ -51,7 +51,7 @@ static int smush_read_header(AVFormatContext *ctx)
AVStream *vst, *ast;
uint32_t magic, nframes, size, subversion, i;
uint32_t width = 0, height = 0, got_audio = 0, read = 0;
- uint32_t sample_rate, channels, palette[256];
+ uint32_t sample_rate, channels, palette[256], frame_rate = 15;
int ret;
magic = avio_rb32(pb);
@@ -76,7 +76,16 @@ static int smush_read_header(AVFormatContext *ctx)
for (i = 0; i < 256; i++)
palette[i] = avio_rb24(pb);
- avio_skip(pb, size - (3 * 256 + 6));
+ if (subversion > 1) {
+ frame_rate = avio_rl32(pb);
+ avio_skip(pb, 4); // max size of FRME chunk in file
+ sample_rate = avio_rl32(pb);
+ avio_skip(pb, size - (3 * 256 + 6 + 3 * 4));
+ if (frame_rate < 1 || frame_rate > 70)
+ frame_rate = 12;
+ } else {
+ avio_skip(pb, size - (3 * 256 + 6));
+ }
} else if (magic == MKBETAG('S', 'A', 'N', 'M')) {
if (avio_rb32(pb) != MKBETAG('S', 'H', 'D', 'R'))
return AVERROR_INVALIDDATA;
@@ -146,7 +155,7 @@ static int smush_read_header(AVFormatContext *ctx)
smush->video_stream_index = vst->index;
- avpriv_set_pts_info(vst, 64, 1, 15);
+ avpriv_set_pts_info(vst, 64, 1, frame_rate);
vst->start_time = 0;
vst->duration =
--
2.47.0
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