FFmpeg

avcodec/thread: Remove ff_thread_get_format define

avcodec/av1dec: Don't rely on AV_PIX_FMT_NONE == -1

avcodec/av1dec: Pass AVCodecContext* as logctx in get_sw_pixel_format()

avformat/wtvdec: Avoid unnecessary allocations

avformat/wtvdec: Use smaller upper bound for buffer