diff --git a/doc/Doxyfile b/doc/Doxyfile
index fb5cdd367764fa061386b959449d6440f362a271..0891899505ce1c4947e67cfd01be28bb2496bd7d 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -1637,7 +1637,7 @@ EXTRA_PACKAGES         =
 # following commands have a special meaning inside the header: $title,
 # $datetime, $date, $doxygenversion, $projectname, $projectnumber,
 # $projectbrief, $projectlogo. Doxygen will replace $title with the empy string,
-# for the replacement values of the other commands the user is refered to
+# for the replacement values of the other commands the user is referred to
 # HTML_HEADER.
 # This tag requires that the tag GENERATE_LATEX is set to YES.
 
diff --git a/doc/encoders.texi b/doc/encoders.texi
index 09e1b9e884c3273786fc6dfdff0c7de3d6f50d38..5a60e7ee5a57ebf5e3dbb9dccab5906872b53da5 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -1773,7 +1773,7 @@ Enable CAVLC and disable CABAC. It generates the same effect as
 @end table
 
 @item cmp
-Set full pixel motion estimation comparation algorithm. Possible values:
+Set full pixel motion estimation comparison algorithm. Possible values:
 
 @table @samp
 @item chroma
diff --git a/doc/ffprobe.texi b/doc/ffprobe.texi
index 2024eed4e5d9a151459b4db340e6a12caa264920..1069ae32de5ddc67d3a1d46ee96dd4d40ba0dc26 100644
--- a/doc/ffprobe.texi
+++ b/doc/ffprobe.texi
@@ -245,7 +245,7 @@ continue reading from that.
 Each interval is specified by two optional parts, separated by "%".
 
 The first part specifies the interval start position. It is
-interpreted as an abolute position, or as a relative offset from the
+interpreted as an absolute position, or as a relative offset from the
 current position if it is preceded by the "+" character. If this first
 part is not specified, no seeking will be performed when reading this
 interval.
diff --git a/doc/filters.texi b/doc/filters.texi
index b470f40f318ca6aafa0e16cd785ca3795769d36c..c37fa295cee0843ec2936c61a3f77bb7b3530d36 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -449,7 +449,7 @@ This filter is bit crusher with enhanced functionality. A bit crusher
 is used to audibly reduce number of bits an audio signal is sampled
 with. This doesn't change the bit depth at all, it just produces the
 effect. Material reduced in bit depth sounds more harsh and "digital".
-This filter is able to even round to continous values instead of discrete
+This filter is able to even round to continuous values instead of discrete
 bit depths.
 Additionally it has a D/C offset which results in different crushing of
 the lower and the upper half of the signal.
@@ -475,7 +475,7 @@ Set level out.
 Set bit reduction.
 
 @item mix
-Set mixing ammount.
+Set mixing amount.
 
 @item mode
 Can be linear: @code{lin} or logarithmic: @code{log}.
@@ -1203,7 +1203,7 @@ Set video stream size. Only useful if curves option is activated.
 
 @item mgain
 Set max gain that will be displayed. Only useful if curves option is activated.
-Setting this to reasonable value allows to display gain which is derived from
+Setting this to a reasonable value makes it possible to display gain which is derived from
 neighbour bands which are too close to each other and thus produce higher gain
 when both are activated.
 
@@ -8858,7 +8858,7 @@ value.
 @section hysteresis
 
 Grow first stream into second stream by connecting components.
-This allows to build more robust edge masks.
+This makes it possible to build more robust edge masks.
 
 This filter accepts the following options:
 
@@ -17670,7 +17670,7 @@ magnitude across time and second represents phase across time.
 The filter will transform from frequency domain as displayed in videos back
 to time domain as presented in audio output.
 
-This filter is primarly created for reversing processed @ref{showspectrum}
+This filter is primarily created for reversing processed @ref{showspectrum}
 filter outputs, but can synthesize sound from other spectrograms too.
 But in such case results are going to be poor if the phase data is not
 available, because in such cases phase data need to be recreated, usually
diff --git a/doc/muxers.texi b/doc/muxers.texi
index dbe53f5cafe509b8fa0da88b4d6b30c0937fc40e..0d856dbf79c2a41d2eb4c18284d88969e457a562 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -1513,14 +1513,14 @@ as a list of @var{key}=@var{value} pairs separated by ':'.
 
 @item drop_pkts_on_overflow @var{bool}
 If set to 1 (true), in case the fifo queue fills up, packets will be dropped
-rather than blocking the encoder. This allows to continue streaming without
-delaying the input, at the cost of ommiting part of the stream. By default
+rather than blocking the encoder. This makes it possible to continue streaming without
+delaying the input, at the cost of omitting part of the stream. By default
 this option is set to 0 (false), so in such cases the encoder will be blocked
 until the muxer processes some of the packets and none of them is lost.
 
 @item attempt_recovery @var{bool}
 If failure occurs, attempt to recover the output. This is especially useful
-when used with network output, allows to restart streaming transparently.
+when used with network output, since it makes it possible to restart streaming transparently.
 By default this option is set to 0 (false).
 
 @item max_recovery_attempts
diff --git a/ffmpeg.c b/ffmpeg.c
index edb27c8cdea7f4ac0e747d528d186d70699b895f..3b9171090f2676f5fa8b6abb11e4cf95d9fb67b3 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -3771,7 +3771,7 @@ static int check_keyboard_interaction(int64_t cur_time)
                         "+      increase verbosity\n"
                         "-      decrease verbosity\n"
                         "c      Send command to first matching filter supporting it\n"
-                        "C      Send/Que command to all matching filters\n"
+                        "C      Send/Queue command to all matching filters\n"
                         "D      cycle through available debug modes\n"
                         "h      dump packets/hex press to cycle through the 3 states\n"
                         "q      quit\n"
diff --git a/ffmpeg_cuvid.c b/ffmpeg_cuvid.c
index bd2d97517f9555f81cf43018dbeb10b61f6368e4..766878f58bc3c75a32fd8498e4915e0d7dc21009 100644
--- a/ffmpeg_cuvid.c
+++ b/ffmpeg_cuvid.c
@@ -129,7 +129,7 @@ int cuvid_transcode_init(OutputStream *ost)
         ist->hwaccel_uninit = cuvid_uninit;
 
         /* This is a bit hacky, av_hwframe_ctx_init is called by the cuvid decoder
-         * once it has probed the neccesary format information. But as filters/nvenc
+         * once it has probed the necessary format information. But as filters/nvenc
          * need to know the format/sw_format, set them here so they are happy.
          * This is fine as long as CUVID doesn't add another supported pix_fmt.
          */
@@ -147,7 +147,7 @@ error:
 
 cancel:
     if (ist->hwaccel_id == HWACCEL_CUVID) {
-        av_log(NULL, AV_LOG_ERROR, "CUVID hwaccel requested, but impossible to achive.\n");
+        av_log(NULL, AV_LOG_ERROR, "CUVID hwaccel requested, but impossible to achieve.\n");
         return AVERROR(EINVAL);
     }
 
diff --git a/libavcodec/aaccoder_twoloop.h b/libavcodec/aaccoder_twoloop.h
index fb9849e317df7ae39d2fe2d84a7215a180e01dd5..f175c5f8b88463fa5ea6957a2f1b13e5764ee719 100644
--- a/libavcodec/aaccoder_twoloop.h
+++ b/libavcodec/aaccoder_twoloop.h
@@ -87,7 +87,7 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx,
      * will keep iterating until it fails to lower it or it reaches
      * ulimit * rdlambda. Keeping it low increases quality on difficult
      * signals, but lower it too much, and bits will be taken from weak
-     * signals, creating "holes". A balance is necesary.
+     * signals, creating "holes". A balance is necessary.
      * rdmax and rdmin specify the relative deviation from rdlambda
      * allowed for tonality compensation
      */
diff --git a/libavcodec/cabac.c b/libavcodec/cabac.c
index c0abe834cfa14199cc19dddcbe9cdae7b73b421c..dd2b057c6dd8391cd82ec090b52d07b3ea0ed4be 100644
--- a/libavcodec/cabac.c
+++ b/libavcodec/cabac.c
@@ -182,7 +182,7 @@ int ff_init_cabac_decoder(CABACContext *c, const uint8_t *buf, int buf_size){
 #if CABAC_BITS == 16
     c->low =  (*c->bytestream++)<<18;
     c->low+=  (*c->bytestream++)<<10;
-    // Keep our fetches on a 2-byte boundry as this should avoid ever having to
+    // Keep our fetches on a 2-byte boundary as this should avoid ever having to
     // do unaligned loads if the compiler (or asm) optimises the double byte
     // load into a single instruction
     if(((uintptr_t)c->bytestream & 1) == 0) {
diff --git a/libavcodec/ffjni.c b/libavcodec/ffjni.c
index 0597400ba603d89a021bb2df1699f58aef72b32e..3f4c3806730df1016f5a666a23e7d9e81ff01cee 100644
--- a/libavcodec/ffjni.c
+++ b/libavcodec/ffjni.c
@@ -224,7 +224,7 @@ int ff_jni_exception_get_summary(JNIEnv *env, jthrowable exception, char **error
     } else if (!name && message) {
         av_bprintf(&bp, "Exception: %s", message);
     } else {
-        av_log(log_ctx, AV_LOG_WARNING, "Could not retreive exception name and message\n");
+        av_log(log_ctx, AV_LOG_WARNING, "Could not retrieve exception name and message\n");
         av_bprintf(&bp, "Exception occurred");
     }
 
diff --git a/libavcodec/mediacodec_wrapper.h b/libavcodec/mediacodec_wrapper.h
index cddd420c2621bff4b47642d18187652bca70486b..1b4f3a9492bcce828ed186dce703db6db66f44c8 100644
--- a/libavcodec/mediacodec_wrapper.h
+++ b/libavcodec/mediacodec_wrapper.h
@@ -44,7 +44,7 @@
  * implementation.
  *
  * The API around MediaCodecList is not part of the NDK (and is lacking as
- * we still need to retreive the codec name to work around faulty decoders
+ * we still need to retrieve the codec name to work around faulty decoders
  * and encoders).
  *
  * For documentation, please refers to NdkMediaCodec.h NdkMediaFormat.h and
diff --git a/libavcodec/psymodel.h b/libavcodec/psymodel.h
index 35d184c710c7c96f3b77b7fb6a1395275de692ed..582f040c7a380f15cd1ee809796ffc1df5db62a2 100644
--- a/libavcodec/psymodel.h
+++ b/libavcodec/psymodel.h
@@ -29,7 +29,7 @@
 /** maximum number of channels */
 #define PSY_MAX_CHANS 20
 
-/* cutoff for VBR is purposedly increased, since LP filtering actually
+/* cutoff for VBR is purposely increased, since LP filtering actually
  * hinders VBR performance rather than the opposite
  */
 #define AAC_CUTOFF_FROM_BITRATE(bit_rate,channels,sample_rate) (bit_rate ? FFMIN3(FFMIN3( \
diff --git a/libavcodec/x86/vp9lpf_16bpp.asm b/libavcodec/x86/vp9lpf_16bpp.asm
index c15437b8bac4389d2d2c5537bd48808b99026ed7..c0888170c923463d71f333085413707c73f1c4e0 100644
--- a/libavcodec/x86/vp9lpf_16bpp.asm
+++ b/libavcodec/x86/vp9lpf_16bpp.asm
@@ -78,7 +78,7 @@ SECTION .text
 %endif
 %endmacro
 
-; calulate p or q portion of flat8out
+; calculate p or q portion of flat8out
 %macro FLAT8OUT_HALF 0
     psubw               m4, m0                      ; q4-q0
     psubw               m5, m0                      ; q5-q0
diff --git a/libavfilter/af_hdcd.c b/libavfilter/af_hdcd.c
index 91f84aea22577201f491306f548c9a9ecea89015..caee470c2ed6e6a2c8e46eedf29d6c3e52f33718 100644
--- a/libavfilter/af_hdcd.c
+++ b/libavfilter/af_hdcd.c
@@ -867,7 +867,7 @@ typedef struct {
      *  steps of 0.5, but no value below -6.0 dB should appear. */
     int gain_counts[16];
     int max_gain;
-    /** occurences of code detect timer expiring without detecting
+    /** occurrences of code detect timer expiring without detecting
      *  a code. -1 for timer never set. */
     int count_sustain_expired;
 
diff --git a/libavfilter/f_ebur128.c b/libavfilter/f_ebur128.c
index 59eaedd92697220b66ba5c2ce65f048ae4a80d8d..983c889017c52c1c406b358d8768926626670fef 100644
--- a/libavfilter/f_ebur128.c
+++ b/libavfilter/f_ebur128.c
@@ -141,7 +141,7 @@ typedef struct {
     int loglevel;                   ///< log level for frame logging
     int metadata;                   ///< whether or not to inject loudness results in frames
     int dual_mono;                  ///< whether or not to treat single channel input files as dual-mono
-    double pan_law;                 ///< pan law value used to calulate dual-mono measurements
+    double pan_law;                 ///< pan law value used to calculate dual-mono measurements
 } EBUR128Context;
 
 enum {
diff --git a/libavformat/internal.h b/libavformat/internal.h
index 49244faf238071f97a5fd8ae6d330938bb443db8..95776a09f5ad47ef6aef0522323c0d79c8d5790e 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -650,7 +650,7 @@ int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf
  * The packet is not removed from the interleaving queue, but only
  * a pointer to it is returned.
  *
- * @param ts_offset the ts difference between packet in the que and the muxer.
+ * @param ts_offset the ts difference between packet in the queue and the muxer.
  *
  * @return a pointer to the next packet, or NULL if no packet is queued
  *         for this stream.
diff --git a/libavutil/frame.h b/libavutil/frame.h
index a19da2f4893407f3f356112c7916d7356798b698..8e51361e293cd6c7542535c6999b5843ca7e635e 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -178,7 +178,7 @@ typedef struct AVFrameSideData {
  * without breaking compatibility with each other.
  *
  * Fields can be accessed through AVOptions, the name string used, matches the
- * C structure field name for fields accessable through AVOptions. The AVClass
+ * C structure field name for fields accessible through AVOptions. The AVClass
  * for AVFrame can be obtained from avcodec_get_frame_class()
  */
 typedef struct AVFrame {
diff --git a/libavutil/tree.h b/libavutil/tree.h
index 9a9e11b92c5f49782c5c7bbdefef4deccfef1fad..d5e0aebfbdb7c1f7e4fc36b437f5c6147c82b94a 100644
--- a/libavutil/tree.h
+++ b/libavutil/tree.h
@@ -58,7 +58,7 @@ struct AVTreeNode *av_tree_node_alloc(void);
  *             then the corresponding entry in next is unchanged.
  * @param cmp compare function used to compare elements in the tree,
  *            API identical to that of Standard C's qsort
- *            It is guranteed that the first and only the first argument to cmp()
+ *            It is guaranteed that the first and only the first argument to cmp()
  *            will be the key parameter to av_tree_find(), thus it could if the
  *            user wants, be a different type (like an opaque context).
  * @return An element with cmp(key, elem) == 0 or NULL if no such element