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Git pushed a commit to branch master
in repository ffmpeg.

commit 7cb93fb200f7b7f4493ec65fe7a2fc7716bb3690
Author:     Niklas Haas <[email protected]>
AuthorDate: Sun May 31 22:24:16 2026 +0200
Commit:     Niklas Haas <[email protected]>
CommitDate: Thu Jun 4 17:48:12 2026 +0200

    avformat/http: return ENOSYS instead of UINT64_MAX for unknown filesize
    
    This matches the behavior of e.g. the pipe: protocol, which returns ENOSYS
    on account of ffurl_seek() not being implemented.
    
    The previous behavior of returning s->filesize directly is almost surely a
    bug, as s->filesize is UINT64_MAX when never initialized.
    
    Sponsored-by: nxtedition AB
    Signed-off-by: Niklas Haas <[email protected]>
---
 libavformat/http.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/http.c b/libavformat/http.c
index 32ec5192c4..fca9f55fe6 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -2096,7 +2096,7 @@ static int64_t http_seek_internal(URLContext *h, int64_t 
off, int whence, int fo
     uint8_t discard[4096];
 
     if (whence == AVSEEK_SIZE)
-        return s->filesize;
+        return s->filesize == UINT64_MAX ? AVERROR(ENOSYS) : s->filesize;
     else if ((s->filesize == UINT64_MAX && whence == SEEK_END))
         return AVERROR(ENOSYS);
 

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