ffmpeg: remove usage of AVCodecContext accessors

Signed-off-by: James Almer <jamrial@gmail.com>

fftools/ffmpeg.c

@@ -2877,7 +2877,7 @@ static int init_input_stream(int ist_index, char *error, int error_len)
 
         /* Useful for subtitles retiming by lavf (FIXME), skipping samples in
          * audio, and video decoders such as cuvid or mediacodec */
-        av_codec_set_pkt_timebase(ist->dec_ctx, ist->st->time_base);
+        ist->dec_ctx->pkt_timebase = ist->st->time_base;
 
         if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0))
             av_dict_set(&ist->decoder_opts, "threads", "auto", 0);

fftools/ffmpeg_opt.c

@@ -794,8 +794,8 @@ static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
             if(!ist->dec)
                 ist->dec = avcodec_find_decoder(par->codec_id);
 #if FF_API_LOWRES
-            if (av_codec_get_lowres(st->codec)) {
-                av_codec_set_lowres(ist->dec_ctx, av_codec_get_lowres(st->codec));
+            if (st->codec->lowres) {
+                ist->dec_ctx->lowres = st->codec->lowres;
                 ist->dec_ctx->width  = st->codec->width;
                 ist->dec_ctx->height = st->codec->height;
                 ist->dec_ctx->coded_width  = st->codec->coded_width;
@@ -1663,7 +1663,7 @@ static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc, in
                 av_log(NULL, AV_LOG_FATAL, "Could not allocate memory for intra matrix.\n");
                 exit_program(1);
             }
-            av_codec_set_chroma_intra_matrix(video_enc, p);
+            video_enc->chroma_intra_matrix = p;
             parse_matrix_coeffs(p, chroma_intra_matrix);
         }
         MATCH_PER_STREAM_OPT(inter_matrices, str, inter_matrix, oc, st);