Existing code did not check if the requested seekback buffer is already read entirely. In this case, nothing has to be done to guarantee seekback.
Signed-off-by: Marton Balint <c...@passwd.hu> --- libavformat/aviobuf.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c index 9675425349..d94be478ac 100644 --- a/libavformat/aviobuf.c +++ b/libavformat/aviobuf.c @@ -999,6 +999,9 @@ int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size) int filled = s->buf_end - s->buffer; ptrdiff_t checksum_ptr_offset = s->checksum_ptr ? s->checksum_ptr - s->buffer : -1; + if (buf_size <= s->buf_end - s->buf_ptr) + return 0; + buf_size += s->buf_ptr - s->buffer + max_buffer_size; if (buf_size < filled || s->seekable || !s->read_packet) -- 2.26.2 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".