avfilter/af_pan: fix sscanf() return value checks in parse_channel_name sscanf() returns EOF (-1) on input failure, which is non-zero and passes a bare truthy check. When this happens, the %n directive is never processed, so len stays uninitialized. Using that value to advance the arg pointer causes an out-of-bounds read and crash. Check for >= 1 instead, matching the fix applied to the other sscanf() call in init() by commit b5b6391d64. Fixes: https://code.ffmpeg.org/FFmpeg/FFmpeg/issues/22451 Signed-off-by: marcos ashton <marcosashiglesias@gmail.com>
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
libavcodec provides implementation of a wider range of codecs.libavformat implements streaming protocols, container formats and basic I/O access.libavutil includes hashers, decompressors and miscellaneous utility functions.libavfilter provides means to alter decoded audio and video through a directed graph of connected filters.libavdevice provides an abstraction to access capture and playback devices.libswresample implements audio mixing and resampling routines.libswscale implements color conversion and scaling routines.aviocat, ismindex and qt-faststart.The offline documentation is available in the doc/ directory.
The online documentation is available in the main website and in the wiki.
Coding examples are available in the doc/examples directory.
FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.
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