Memory Leak: File buffer not freed, leaking 16MB per demuxer instance

[THE-Amrit-mahto-05]

Description

Discovered a memory leak in CCExtractor: the file buffer allocated by the demuxer is never freed. This results in approximately 16MB of memory being leaked for each demuxer instance.

Steps to Reproduce

1. Run CCExtractor on a video file.
2. Observe memory usage of the process.
3. Repeat with multiple files or instances.
4. Memory usage continues to grow and is not released.

Impact

• Long-running or batch operations can consume large amounts of memory.
• Could cause crashes or slow performance on low-memory systems.
• This is a real, current issue affecting stability, not a futuristic concern.

Suggestion

• Free the allocated file buffer after demuxing completes.
• Add tests to verify that buffers are properly released.

[cfsmp3]

Please don't open a ticket for these things - PRs are OK, but issues are for users to report problems. If a developer sees a problem he/she just sends a PR.