diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 11002e4c29..629f738ac1 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -277,25 +277,6 @@ typedef struct AVProbeData {
 #define AVPROBE_SCORE_MAX 100               ///< maximum score, half of that is used for file-extension-based detection
 #define AVPROBE_PADDING_SIZE 32             ///< extra allocated bytes at the end of the probe buffer
 
-typedef struct AVFormatParameters {
-#if FF_API_FORMAT_PARAMETERS
-    attribute_deprecated AVRational time_base;
-    attribute_deprecated int sample_rate;
-    attribute_deprecated int channels;
-    attribute_deprecated int width;
-    attribute_deprecated int height;
-    attribute_deprecated enum PixelFormat pix_fmt;
-    attribute_deprecated int channel; /**< Used to select DV channel. */
-    attribute_deprecated const char *standard; /**< deprecated, use demuxer-specific options instead. */
-    attribute_deprecated unsigned int mpeg2ts_raw:1;  /**< deprecated, use mpegtsraw demuxer */
-    /**< deprecated, use mpegtsraw demuxer-specific options instead */
-    attribute_deprecated unsigned int mpeg2ts_compute_pcr:1;
-    attribute_deprecated unsigned int initial_pause:1;       /**< Do not begin to play the stream
-                                                                  immediately (RTSP only). */
-    attribute_deprecated unsigned int prealloced_context:1;
-#endif
-} AVFormatParameters;
-
 /// Demuxer will use avio_open, no opened file should be provided by the caller.
 #define AVFMT_NOFILE        0x0001
 #define AVFMT_NEEDNUMBER    0x0002 /**< Needs '%d' in filename. */
@@ -354,7 +335,6 @@ typedef struct AVOutputFormat {
     /**
      * Currently only used to set pixel format if not YUV420P.
      */
-    int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
     int (*interleave_packet)(struct AVFormatContext *, AVPacket *out,
                              AVPacket *in, int flush);
 
@@ -1272,36 +1252,6 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
                           const char *filename, void *logctx,
                           unsigned int offset, unsigned int max_probe_size);
 
-#if FF_API_FORMAT_PARAMETERS
-/**
- * Allocate all the structures needed to read an input stream.
- *        This does not open the needed codecs for decoding the stream[s].
- * @deprecated use avformat_open_input instead.
- */
-attribute_deprecated int av_open_input_stream(AVFormatContext **ic_ptr,
-                         AVIOContext *pb, const char *filename,
-                         AVInputFormat *fmt, AVFormatParameters *ap);
-
-/**
- * Open a media file as input. The codecs are not opened. Only the file
- * header (if present) is read.
- *
- * @param ic_ptr The opened media file handle is put here.
- * @param filename filename to open
- * @param fmt If non-NULL, force the file format to use.
- * @param buf_size optional buffer size (zero if default is OK)
- * @param ap Additional parameters needed when opening the file
- *           (NULL if default).
- * @return 0 if OK, AVERROR_xxx otherwise
- *
- * @deprecated use avformat_open_input instead.
- */
-attribute_deprecated int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
-                       AVInputFormat *fmt,
-                       int buf_size,
-                       AVFormatParameters *ap);
-#endif
-
 /**
  * Open an input stream and read the header. The codecs are not opened.
  * The stream must be closed with av_close_input_file().
@@ -1323,26 +1273,6 @@ attribute_deprecated int av_open_input_file(AVFormatContext **ic_ptr, const char
  */
 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options);
 
-#if FF_API_FORMAT_PARAMETERS
-/**
- * Read packets of a media file to get stream information. This
- * is useful for file formats with no headers such as MPEG. This
- * function also computes the real framerate in case of MPEG-2 repeat
- * frame mode.
- * The logical file position is not changed by this function;
- * examined packets may be buffered for later processing.
- *
- * @param ic media file handle
- * @return >=0 if OK, AVERROR_xxx on error
- * @todo Let the user decide somehow what information is needed so that
- *       we do not waste time getting stuff the user does not need.
- *
- * @deprecated use avformat_find_stream_info.
- */
-attribute_deprecated
-int av_find_stream_info(AVFormatContext *ic);
-#endif
-
 /**
  * Read packets of a media file to get stream information. This
  * is useful for file formats with no headers such as MPEG. This
@@ -1490,16 +1420,6 @@ int av_read_play(AVFormatContext *s);
  */
 int av_read_pause(AVFormatContext *s);
 
-#if FF_API_FORMAT_PARAMETERS
-/**
- * Free a AVFormatContext allocated by av_open_input_stream.
- * @param s context to free
- * @deprecated use av_close_input_file()
- */
-attribute_deprecated
-void av_close_input_stream(AVFormatContext *s);
-#endif
-
 #if FF_API_CLOSE_INPUT_FILE
 /**
  * @deprecated use avformat_close_input()
@@ -1564,13 +1484,6 @@ int64_t av_gen_search(AVFormatContext *s, int stream_index,
                       int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
 #endif
 
-#if FF_API_FORMAT_PARAMETERS
-/**
- * @deprecated pass the options to avformat_write_header directly.
- */
-attribute_deprecated int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
-#endif
-
 /**
  * @addtogroup lavf_encoding
  * @{
@@ -1592,21 +1505,6 @@ attribute_deprecated int av_set_parameters(AVFormatContext *s, AVFormatParameter
  */
 int avformat_write_header(AVFormatContext *s, AVDictionary **options);
 
-#if FF_API_FORMAT_PARAMETERS
-/**
- * Allocate the stream private data and write the stream header to an
- * output media file.
- * @note: this sets stream time-bases, if possible to stream->codec->time_base
- * but for some formats it might also be some other time base
- *
- * @param s media file handle
- * @return 0 if OK, AVERROR_xxx on error
- *
- * @deprecated use avformat_write_header.
- */
-attribute_deprecated int av_write_header(AVFormatContext *s);
-#endif
-
 /**
  * Write a packet to an output media file.
  *
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 51774e0ff2..8860d47690 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -400,93 +400,6 @@ static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeDa
 /************************************************************/
 /* input media file */
 
-#if FF_API_FORMAT_PARAMETERS
-static AVDictionary *convert_format_parameters(AVFormatParameters *ap)
-{
-    char buf[1024];
-    AVDictionary *opts = NULL;
-
-    if (!ap)
-        return NULL;
-
-    if (ap->time_base.num) {
-        snprintf(buf, sizeof(buf), "%d/%d", ap->time_base.den, ap->time_base.num);
-        av_dict_set(&opts, "framerate", buf, 0);
-    }
-    if (ap->sample_rate) {
-        snprintf(buf, sizeof(buf), "%d", ap->sample_rate);
-        av_dict_set(&opts, "sample_rate", buf, 0);
-    }
-    if (ap->channels) {
-        snprintf(buf, sizeof(buf), "%d", ap->channels);
-        av_dict_set(&opts, "channels", buf, 0);
-    }
-    if (ap->width || ap->height) {
-        snprintf(buf, sizeof(buf), "%dx%d", ap->width, ap->height);
-        av_dict_set(&opts, "video_size", buf, 0);
-    }
-    if (ap->pix_fmt != PIX_FMT_NONE) {
-        av_dict_set(&opts, "pixel_format", av_get_pix_fmt_name(ap->pix_fmt), 0);
-    }
-    if (ap->channel) {
-        snprintf(buf, sizeof(buf), "%d", ap->channel);
-        av_dict_set(&opts, "channel", buf, 0);
-    }
-    if (ap->standard) {
-        av_dict_set(&opts, "standard", ap->standard, 0);
-    }
-    if (ap->mpeg2ts_compute_pcr) {
-        av_dict_set(&opts, "mpeg2ts_compute_pcr", "1", 0);
-    }
-    if (ap->initial_pause) {
-        av_dict_set(&opts, "initial_pause", "1", 0);
-    }
-    return opts;
-}
-
-/**
- * Open a media file from an IO stream. 'fmt' must be specified.
- */
-int av_open_input_stream(AVFormatContext **ic_ptr,
-                         AVIOContext *pb, const char *filename,
-                         AVInputFormat *fmt, AVFormatParameters *ap)
-{
-    int err;
-    AVDictionary *opts;
-    AVFormatContext *ic;
-    AVFormatParameters default_ap;
-
-    if(!ap){
-        ap=&default_ap;
-        memset(ap, 0, sizeof(default_ap));
-    }
-    opts = convert_format_parameters(ap);
-
-    if(!ap->prealloced_context)
-        ic = avformat_alloc_context();
-    else
-        ic = *ic_ptr;
-    if (!ic) {
-        err = AVERROR(ENOMEM);
-        goto fail;
-    }
-    if (pb && fmt && fmt->flags & AVFMT_NOFILE)
-        av_log(ic, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
-                                   "will be ignored with AVFMT_NOFILE format.\n");
-    else
-        ic->pb = pb;
-
-    if ((err = avformat_open_input(&ic, filename, fmt, &opts)) < 0)
-        goto fail;
-    ic->pb = ic->pb ? ic->pb : pb; // don't leak custom pb if it wasn't set above
-
-fail:
-    *ic_ptr = ic;
-    av_dict_free(&opts);
-    return err;
-}
-#endif
-
 /** size of probe buffer, for guessing file type from file contents */
 #define PROBE_BUF_MIN 2048
 #define PROBE_BUF_MAX (1<<20)
@@ -558,25 +471,6 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
     return ret;
 }
 
-#if FF_API_FORMAT_PARAMETERS
-int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
-                       AVInputFormat *fmt,
-                       int buf_size,
-                       AVFormatParameters *ap)
-{
-    int err;
-    AVDictionary *opts = convert_format_parameters(ap);
-
-    if (!ap || !ap->prealloced_context)
-        *ic_ptr = NULL;
-
-    err = avformat_open_input(ic_ptr, filename, fmt, &opts);
-
-    av_dict_free(&opts);
-    return err;
-}
-#endif
-
 /* open input file and probe the format if necessary */
 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
 {
@@ -2273,13 +2167,6 @@ static int tb_unreliable(AVCodecContext *c){
     return 0;
 }
 
-#if FF_API_FORMAT_PARAMETERS
-int av_find_stream_info(AVFormatContext *ic)
-{
-    return avformat_find_stream_info(ic, NULL);
-}
-#endif
-
 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
 {
     int i, count, ret, read_size, j;
@@ -2680,16 +2567,6 @@ int av_read_pause(AVFormatContext *s)
     return AVERROR(ENOSYS);
 }
 
-#if FF_API_FORMAT_PARAMETERS
-void av_close_input_stream(AVFormatContext *s)
-{
-    flush_packet_queue(s);
-    if (s->iformat->read_close)
-        s->iformat->read_close(s);
-    avformat_free_context(s);
-}
-#endif
-
 void avformat_free_context(AVFormatContext *s)
 {
     int i;
@@ -2863,31 +2740,6 @@ AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
 /************************************************************/
 /* output media file */
 
-#if FF_API_FORMAT_PARAMETERS
-int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
-{
-    int ret;
-
-    if (s->oformat->priv_data_size > 0) {
-        s->priv_data = av_mallocz(s->oformat->priv_data_size);
-        if (!s->priv_data)
-            return AVERROR(ENOMEM);
-        if (s->oformat->priv_class) {
-            *(const AVClass**)s->priv_data= s->oformat->priv_class;
-            av_opt_set_defaults(s->priv_data);
-        }
-    } else
-        s->priv_data = NULL;
-
-    if (s->oformat->set_parameters) {
-        ret = s->oformat->set_parameters(s, ap);
-        if (ret < 0)
-            return ret;
-    }
-    return 0;
-}
-#endif
-
 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
 {
     const AVCodecTag *avctag;
@@ -2921,13 +2773,6 @@ static int validate_codec_tag(AVFormatContext *s, AVStream *st)
     return 1;
 }
 
-#if FF_API_FORMAT_PARAMETERS
-int av_write_header(AVFormatContext *s)
-{
-    return avformat_write_header(s, NULL);
-}
-#endif
-
 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
 {
     int ret = 0, i;
diff --git a/libavformat/version.h b/libavformat/version.h
index b362352f2e..f55fc019c1 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -65,9 +65,6 @@
 #ifndef FF_API_SDP_CREATE
 #define FF_API_SDP_CREATE              (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif
-#ifndef FF_API_FORMAT_PARAMETERS
-#define FF_API_FORMAT_PARAMETERS       (LIBAVFORMAT_VERSION_MAJOR < 54)
-#endif
 #ifndef FF_API_FLAG_RTP_HINT
 #define FF_API_FLAG_RTP_HINT           (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif