avdemux: Never return 0 from read function
Instead return AVERROR_EOF. The read function must never ever return 0 according to the documentation, and in practice this leads to infinite loops.
Fixes #3369 (closed)
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Instead return AVERROR_EOF. The read function must never ever return 0 according to the documentation, and in practice this leads to infinite loops.
Fixes #3369 (closed)