[FFmpeg-devel] [PATCH] Never shrink the buffer in ff_rewind_with_probe_data

[Martin Storsjö]

Hi,

In ff_rewind_with_probe_data, if there is little unread data in the 
ByteIOContext buffer (e.g. when reading over a network where less data 
than requested may be returned in fill_buffer()), this may lead to 
reducing the size of the ByteIOContext buffer to little more the probe 
data size. This can lead to suboptimal aviobuf behaviour, e.g. making some 
demuxers fail to do short seeks backwards (if the input isn't seekable).

This makes the mpegts demuxer work when probed over non-seekable http.

// Martin
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