ffmpeg: Replace deprecated and soon removed avcodec_close with avcodec_free_context (#4837)

avcodec_close (AVCodecContext *avctx) removing in ffmpeg 7.2 and was
deprecated for couple years

Global avcodec_close (AVCodecContext *avctx)
Do not use this function. Use avcodec_free_context() to destroy a codec
context (either open or closed). Opening and closing a codec context
multiple times is not supported anymore – use multiple codec contexts
instead.

In ffmpeg master, it has already been removed. But still work in v7.1

We checked the ffmpeg changelog, and avcodec_free_context was added 7 years ago and should be present in ffmpeg 4.0, the oldest version we support.

Signed-off-by: Vlad (Kuzmin) Erium <[email protected]>

Author: ssh4net

src/ffmpeg.imageio/ffmpeginput.cpp

@@ -599,7 +599,7 @@ bool
 FFmpegInput::close(void)
 {
     if (m_codec_context)
-        avcodec_close(m_codec_context);
+        avcodec_free_context(&m_codec_context);
     if (m_format_context) {
         avformat_close_input(&m_format_context);
         av_free(m_format_context);  // will free m_codec and m_codec_context