diff --git a/libavformat/pcm.c b/libavformat/pcm.c
index 806f91b6b1..f0ea029633 100644
--- a/libavformat/pcm.c
+++ b/libavformat/pcm.c
@@ -24,17 +24,48 @@
 #include "internal.h"
 #include "pcm.h"
 
-#define RAW_SAMPLES     1024
+#define RAW_SAMPLES 1024
+
+/*
+ * copied from https://stackoverflow.com/questions/2679815/previous-power-of-2
+ * computes the previous power of two.
+ */
+static uint32_t flp2 (uint32_t x)
+{
+    x = x | (x >> 1);
+    x = x | (x >> 2);
+    x = x | (x >> 4);
+    x = x | (x >> 8);
+    x = x | (x >> 16);
+    x = x - (x >> 1);
+    return x + (x == 0); /* if x is zero, return 1 */
+}
 
 int ff_pcm_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    int ret, size;
+    int i, ret, strmsize, readsize = INT_MAX;
+    AVCodecParameters *codec;
+
+     /*
+      * recompute read size based on sample rate of the inputs, make sure
+      * to complete a read every 10ms by selecting the smallest sample rate
+      */
+    for (i=0; i < s->nb_streams; i++) {
+      codec = s->streams[i]->codecpar;
+      strmsize = codec->sample_rate / 100 * codec->block_align;
+      readsize = FFMIN(readsize, strmsize);
+    }
+
+    /*
+     * clamp to RAW_SAMPLES if larger, and to previous power of two.
+     */
+    readsize = flp2(FFMIN(readsize,
+               RAW_SAMPLES * s->streams[0]->codecpar->block_align));
 
-    size= RAW_SAMPLES*s->streams[0]->codecpar->block_align;
-    if (size <= 0)
+    if (readsize <= 0)
         return AVERROR(EINVAL);
 
-    ret= av_get_packet(s->pb, pkt, size);
+    ret = av_get_packet(s->pb, pkt, readsize);
 
     pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
     pkt->stream_index = 0;
diff --git a/tests/Makefile b/tests/Makefile
index 327e3f4420..9df0d7eff9 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -1,3 +1,4 @@
+PROGSSUF = _g
 THREADS = 1
 VREF = tests/vsynth1/00.pgm
 AREF = tests/data/asynth1.sw
diff --git a/tests/ref/lavf/ast b/tests/ref/lavf/ast
index 513c612e76..f01786720d 100644
--- a/tests/ref/lavf/ast
+++ b/tests/ref/lavf/ast
@@ -1,3 +1,3 @@
-07f5d23aa8bade984034f7005bd72947 *./tests/data/lavf/lavf.ast
-177872 ./tests/data/lavf/lavf.ast
+7b3e74233bb7399593316b9fced596fd *./tests/data/lavf/lavf.ast
+182000 ./tests/data/lavf/lavf.ast
 ./tests/data/lavf/lavf.ast CRC=0xe61e3bd0
diff --git a/tests/ref/lavf/mov b/tests/ref/lavf/mov
index 2e1f24dfc6..57324f73f7 100644
--- a/tests/ref/lavf/mov
+++ b/tests/ref/lavf/mov
@@ -1,15 +1,15 @@
-a10d50f2679df92264e1fc21cb8be630 *./tests/data/lavf/lavf.mov
-366449 ./tests/data/lavf/lavf.mov
-./tests/data/lavf/lavf.mov CRC=0xbb2b949b
-6258f70f974e3c802e01d02ac33c7bbd *./tests/data/lavf/lavf.mov
-357539 ./tests/data/lavf/lavf.mov
-./tests/data/lavf/lavf.mov CRC=0xbb2b949b
-ba3b8b49e420510a0d417400dbedfc2d *./tests/data/lavf/lavf.mov
-366621 ./tests/data/lavf/lavf.mov
-./tests/data/lavf/lavf.mov CRC=0xa9793231
-fd0e4de8e7f6d0c8c0681d7020f00f50 *./tests/data/lavf/lavf.mov
-356921 ./tests/data/lavf/lavf.mov
-./tests/data/lavf/lavf.mov CRC=0xbb2b949b
+fc5707661e4fbfec0613202feacdc005 *./tests/data/lavf/lavf.mov
+371609 ./tests/data/lavf/lavf.mov
+./tests/data/lavf/lavf.mov CRC=0x1e04949b
+f901c132467eaaa3d0b0620418b8ce54 *./tests/data/lavf/lavf.mov
+357443 ./tests/data/lavf/lavf.mov
+./tests/data/lavf/lavf.mov CRC=0x1e04949b
+0cb4720f248243fa7180a83b9aaa96d7 *./tests/data/lavf/lavf.mov
+366489 ./tests/data/lavf/lavf.mov
+./tests/data/lavf/lavf.mov CRC=0x10a43231
+8cd0311e2e080675db3913a312fce2ce *./tests/data/lavf/lavf.mov
+356825 ./tests/data/lavf/lavf.mov
+./tests/data/lavf/lavf.mov CRC=0x1e04949b
 ebca72c186a4f3ba9bb17d9cb5b74fef *./tests/data/lavf/lavf.mp4
 312457 ./tests/data/lavf/lavf.mp4
 ./tests/data/lavf/lavf.mp4 CRC=0x9d9a638a
diff --git a/tests/ref/lavf/smjpeg b/tests/ref/lavf/smjpeg
index fb8c6542fa..3ae3ffff65 100644
--- a/tests/ref/lavf/smjpeg
+++ b/tests/ref/lavf/smjpeg
@@ -1,3 +1,3 @@
-3fe90213ac4f5275eb85ad0a4e4bdb44 *./tests/data/lavf/lavf.smjpeg
-728642 ./tests/data/lavf/lavf.smjpeg
-./tests/data/lavf/lavf.smjpeg CRC=0x54bf6147
+5df56884e1bd4aad5a26941c3ddc8196 *./tests/data/lavf/lavf.smjpeg
+730190 ./tests/data/lavf/lavf.smjpeg
+./tests/data/lavf/lavf.smjpeg CRC=0xde196147
diff --git a/tests/ref/lavf/voc b/tests/ref/lavf/voc
index ded8af7227..b543a051fe 100644
--- a/tests/ref/lavf/voc
+++ b/tests/ref/lavf/voc
@@ -1,3 +1,3 @@
-bb5ad96a5e1b35683d50bf18115db821 *./tests/data/lavf/lavf.voc
-44305 ./tests/data/lavf/lavf.voc
+6a101a05377ddd79aff95c3606810818 *./tests/data/lavf/lavf.voc
+44821 ./tests/data/lavf/lavf.voc
 ./tests/data/lavf/lavf.voc CRC=0x298fd284
diff --git a/tests/ref/lavf/voc_s16 b/tests/ref/lavf/voc_s16
index d026090aff..ccdb6366b1 100644
--- a/tests/ref/lavf/voc_s16
+++ b/tests/ref/lavf/voc_s16
@@ -1,3 +1,3 @@
-db9fa22ff71992bd8b6cc80047223c92 *./tests/data/lavf/lavf.s16.voc
-176615 ./tests/data/lavf/lavf.s16.voc
+ed4a2fdb86c34ad7f6d9772fd8cdfab1 *./tests/data/lavf/lavf.s16.voc
+177131 ./tests/data/lavf/lavf.s16.voc
 ./tests/data/lavf/lavf.s16.voc CRC=0xe61e3bd0
diff --git a/tests/ref/seek/acodec-pcm-f32be b/tests/ref/seek/acodec-pcm-f32be
index b838262b58..89c8e9d7a9 100644
--- a/tests/ref/seek/acodec-pcm-f32be
+++ b/tests/ref/seek/acodec-pcm-f32be
@@ -1,53 +1,53 @@
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  2048
 ret: 0         st:-1 flags:0  ts:-1.000000
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  2048
 ret: 0         st:-1 flags:1  ts: 1.894167
-ret: 0         st: 0 flags:1 dts: 1.894172 pts: 1.894172 pos: 668296 size:  8192
+ret: 0         st: 0 flags:1 dts: 1.894172 pts: 1.894172 pos: 668296 size:  2048
 ret: 0         st: 0 flags:0  ts: 0.788345
-ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos: 278160 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos: 278160 size:  2048
 ret: 0         st: 0 flags:1  ts:-0.317506
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  2048
 ret: 0         st:-1 flags:0  ts: 2.576668
-ret: 0         st: 0 flags:1 dts: 2.576667 pts: 2.576667 pos: 909080 size:  8192
+ret: 0         st: 0 flags:1 dts: 2.576667 pts: 2.576667 pos: 909080 size:  2048
 ret: 0         st:-1 flags:1  ts: 1.470835
-ret: 0         st: 0 flags:1 dts: 1.470839 pts: 1.470839 pos: 518944 size:  8192
+ret: 0         st: 0 flags:1 dts: 1.470839 pts: 1.470839 pos: 518944 size:  2048
 ret: 0         st: 0 flags:0  ts: 0.365011
-ret: 0         st: 0 flags:1 dts: 0.365011 pts: 0.365011 pos: 128808 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.365011 pts: 0.365011 pos: 128808 size:  2048
 ret: 0         st: 0 flags:1  ts:-0.740839
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  2048
 ret: 0         st:-1 flags:0  ts: 2.153336
-ret: 0         st: 0 flags:1 dts: 2.153333 pts: 2.153333 pos: 759728 size:  8192
+ret: 0         st: 0 flags:1 dts: 2.153333 pts: 2.153333 pos: 759728 size:  2048
 ret: 0         st:-1 flags:1  ts: 1.047503
-ret: 0         st: 0 flags:1 dts: 1.047506 pts: 1.047506 pos: 369592 size:  8192
+ret: 0         st: 0 flags:1 dts: 1.047506 pts: 1.047506 pos: 369592 size:  2048
 ret: 0         st: 0 flags:0  ts:-0.058322
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  2048
 ret: 0         st: 0 flags:1  ts: 2.835828
-ret: 0         st: 0 flags:1 dts: 2.835828 pts: 2.835828 pos:1000512 size:  8192
+ret: 0         st: 0 flags:1 dts: 2.835828 pts: 2.835828 pos:1000512 size:  2048
 ret: 0         st:-1 flags:0  ts: 1.730004
-ret: 0         st: 0 flags:1 dts: 1.730000 pts: 1.730000 pos: 610376 size:  8192
+ret: 0         st: 0 flags:1 dts: 1.730000 pts: 1.730000 pos: 610376 size:  2048
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos: 220240 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos: 220240 size:  2048
 ret: 0         st: 0 flags:0  ts:-0.481655
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  2048
 ret: 0         st: 0 flags:1  ts: 2.412494
-ret: 0         st: 0 flags:1 dts: 2.412494 pts: 2.412494 pos: 851160 size:  8192
+ret: 0         st: 0 flags:1 dts: 2.412494 pts: 2.412494 pos: 851160 size:  2048
 ret: 0         st:-1 flags:0  ts: 1.306672
-ret: 0         st: 0 flags:1 dts: 1.306667 pts: 1.306667 pos: 461024 size:  8192
+ret: 0         st: 0 flags:1 dts: 1.306667 pts: 1.306667 pos: 461024 size:  2048
 ret: 0         st:-1 flags:1  ts: 0.200839
-ret: 0         st: 0 flags:1 dts: 0.200839 pts: 0.200839 pos:  70888 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.200839 pts: 0.200839 pos:  70888 size:  2048
 ret: 0         st: 0 flags:0  ts:-0.904989
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  2048
 ret: 0         st: 0 flags:1  ts: 1.989184
-ret: 0         st: 0 flags:1 dts: 1.989184 pts: 1.989184 pos: 701816 size:  8192
+ret: 0         st: 0 flags:1 dts: 1.989184 pts: 1.989184 pos: 701816 size:  2048
 ret: 0         st:-1 flags:0  ts: 0.883340
-ret: 0         st: 0 flags:1 dts: 0.883333 pts: 0.883333 pos: 311672 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.883333 pts: 0.883333 pos: 311672 size:  2048
 ret: 0         st:-1 flags:1  ts:-0.222493
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  2048
 ret: 0         st: 0 flags:0  ts: 2.671678
-ret: 0         st: 0 flags:1 dts: 2.671678 pts: 2.671678 pos: 942600 size:  8192
+ret: 0         st: 0 flags:1 dts: 2.671678 pts: 2.671678 pos: 942600 size:  2048
 ret: 0         st: 0 flags:1  ts: 1.565850
-ret: 0         st: 0 flags:1 dts: 1.565850 pts: 1.565850 pos: 552464 size:  8192
+ret: 0         st: 0 flags:1 dts: 1.565850 pts: 1.565850 pos: 552464 size:  2048
 ret: 0         st:-1 flags:0  ts: 0.460008
-ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos: 162320 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos: 162320 size:  2048
 ret: 0         st:-1 flags:1  ts:-0.645825
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  8192
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  2048
diff --git a/tests/ref/seek/acodec-pcm-f64be b/tests/ref/seek/acodec-pcm-f64be
index 82223517d5..8b050e9914 100644
--- a/tests/ref/seek/acodec-pcm-f64be
+++ b/tests/ref/seek/acodec-pcm-f64be
@@ -1,53 +1,53 @@
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  4096
 ret: 0         st:-1 flags:0  ts:-1.000000
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  4096
 ret: 0         st:-1 flags:1  ts: 1.894167
-ret: 0         st: 0 flags:1 dts: 1.894172 pts: 1.894172 pos:1336560 size: 16384
+ret: 0         st: 0 flags:1 dts: 1.894172 pts: 1.894172 pos:1336560 size:  4096
 ret: 0         st: 0 flags:0  ts: 0.788345
-ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos: 556288 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos: 556288 size:  4096
 ret: 0         st: 0 flags:1  ts:-0.317506
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  4096
 ret: 0         st:-1 flags:0  ts: 2.576668
-ret: 0         st: 0 flags:1 dts: 2.576667 pts: 2.576667 pos:1818128 size: 16384
+ret: 0         st: 0 flags:1 dts: 2.576667 pts: 2.576667 pos:1818128 size:  4096
 ret: 0         st:-1 flags:1  ts: 1.470835
-ret: 0         st: 0 flags:1 dts: 1.470839 pts: 1.470839 pos:1037856 size: 16384
+ret: 0         st: 0 flags:1 dts: 1.470839 pts: 1.470839 pos:1037856 size:  4096
 ret: 0         st: 0 flags:0  ts: 0.365011
-ret: 0         st: 0 flags:1 dts: 0.365011 pts: 0.365011 pos: 257584 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.365011 pts: 0.365011 pos: 257584 size:  4096
 ret: 0         st: 0 flags:1  ts:-0.740839
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  4096
 ret: 0         st:-1 flags:0  ts: 2.153336
-ret: 0         st: 0 flags:1 dts: 2.153333 pts: 2.153333 pos:1519424 size: 16384
+ret: 0         st: 0 flags:1 dts: 2.153333 pts: 2.153333 pos:1519424 size:  4096
 ret: 0         st:-1 flags:1  ts: 1.047503
-ret: 0         st: 0 flags:1 dts: 1.047506 pts: 1.047506 pos: 739152 size: 16384
+ret: 0         st: 0 flags:1 dts: 1.047506 pts: 1.047506 pos: 739152 size:  4096
 ret: 0         st: 0 flags:0  ts:-0.058322
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  4096
 ret: 0         st: 0 flags:1  ts: 2.835828
-ret: 0         st: 0 flags:1 dts: 2.835828 pts: 2.835828 pos:2000992 size: 16384
+ret: 0         st: 0 flags:1 dts: 2.835828 pts: 2.835828 pos:2000992 size:  4096
 ret: 0         st:-1 flags:0  ts: 1.730004
-ret: 0         st: 0 flags:1 dts: 1.730000 pts: 1.730000 pos:1220720 size: 16384
+ret: 0         st: 0 flags:1 dts: 1.730000 pts: 1.730000 pos:1220720 size:  4096
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos: 440448 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos: 440448 size:  4096
 ret: 0         st: 0 flags:0  ts:-0.481655
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  4096
 ret: 0         st: 0 flags:1  ts: 2.412494
-ret: 0         st: 0 flags:1 dts: 2.412494 pts: 2.412494 pos:1702288 size: 16384
+ret: 0         st: 0 flags:1 dts: 2.412494 pts: 2.412494 pos:1702288 size:  4096
 ret: 0         st:-1 flags:0  ts: 1.306672
-ret: 0         st: 0 flags:1 dts: 1.306667 pts: 1.306667 pos: 922016 size: 16384
+ret: 0         st: 0 flags:1 dts: 1.306667 pts: 1.306667 pos: 922016 size:  4096
 ret: 0         st:-1 flags:1  ts: 0.200839
-ret: 0         st: 0 flags:1 dts: 0.200839 pts: 0.200839 pos: 141744 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.200839 pts: 0.200839 pos: 141744 size:  4096
 ret: 0         st: 0 flags:0  ts:-0.904989
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  4096
 ret: 0         st: 0 flags:1  ts: 1.989184
-ret: 0         st: 0 flags:1 dts: 1.989184 pts: 1.989184 pos:1403600 size: 16384
+ret: 0         st: 0 flags:1 dts: 1.989184 pts: 1.989184 pos:1403600 size:  4096
 ret: 0         st:-1 flags:0  ts: 0.883340
-ret: 0         st: 0 flags:1 dts: 0.883333 pts: 0.883333 pos: 623312 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.883333 pts: 0.883333 pos: 623312 size:  4096
 ret: 0         st:-1 flags:1  ts:-0.222493
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  4096
 ret: 0         st: 0 flags:0  ts: 2.671678
-ret: 0         st: 0 flags:1 dts: 2.671678 pts: 2.671678 pos:1885168 size: 16384
+ret: 0         st: 0 flags:1 dts: 2.671678 pts: 2.671678 pos:1885168 size:  4096
 ret: 0         st: 0 flags:1  ts: 1.565850
-ret: 0         st: 0 flags:1 dts: 1.565850 pts: 1.565850 pos:1104896 size: 16384
+ret: 0         st: 0 flags:1 dts: 1.565850 pts: 1.565850 pos:1104896 size:  4096
 ret: 0         st:-1 flags:0  ts: 0.460008
-ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos: 324608 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos: 324608 size:  4096
 ret: 0         st:-1 flags:1  ts:-0.645825
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size: 16384
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  4096
diff --git a/tests/ref/seek/lavf-alaw b/tests/ref/seek/lavf-alaw
index 4b1f8fbc02..e46de928a2 100644
--- a/tests/ref/seek/lavf-alaw
+++ b/tests/ref/seek/lavf-alaw
@@ -1,53 +1,53 @@
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st:-1 flags:0  ts:-1.000000
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st:-1 flags:1  ts: 1.894167
-ret: 0         st: 0 flags:1 dts: 1.894150 pts: 1.894150 pos:  41766 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.894150 pts: 1.894150 pos:  41766 size:   128
 ret: 0         st: 0 flags:0  ts: 0.788345
-ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos:  17383 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos:  17383 size:   128
 ret: 0         st: 0 flags:1  ts:-0.317506
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st:-1 flags:0  ts: 2.576668
 ret:-EOF
 ret: 0         st:-1 flags:1  ts: 1.470835
-ret: 0         st: 0 flags:1 dts: 1.470839 pts: 1.470839 pos:  32432 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.470839 pts: 1.470839 pos:  32432 size:   128
 ret: 0         st: 0 flags:0  ts: 0.364989
-ret: 0         st: 0 flags:1 dts: 0.364989 pts: 0.364989 pos:   8048 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.364989 pts: 0.364989 pos:   8048 size:   128
 ret: 0         st: 0 flags:1  ts:-0.740816
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st:-1 flags:0  ts: 2.153336
 ret:-EOF
 ret: 0         st:-1 flags:1  ts: 1.047503
-ret: 0         st: 0 flags:1 dts: 1.047483 pts: 1.047483 pos:  23097 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.047483 pts: 1.047483 pos:  23097 size:   128
 ret: 0         st: 0 flags:0  ts:-0.058322
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st: 0 flags:1  ts: 2.835828
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 1.730004
-ret: 0         st: 0 flags:1 dts: 1.730023 pts: 1.730023 pos:  38147 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.730023 pts: 1.730023 pos:  38147 size:   128
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos:  13763 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos:  13763 size:   128
 ret: 0         st: 0 flags:0  ts:-0.481678
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st: 0 flags:1  ts: 2.412517
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 1.306672
-ret: 0         st: 0 flags:1 dts: 1.306667 pts: 1.306667 pos:  28812 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.306667 pts: 1.306667 pos:  28812 size:   128
 ret: 0         st:-1 flags:1  ts: 0.200839
-ret: 0         st: 0 flags:1 dts: 0.200816 pts: 0.200816 pos:   4428 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.200816 pts: 0.200816 pos:   4428 size:   128
 ret: 0         st: 0 flags:0  ts:-0.904989
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st: 0 flags:1  ts: 1.989161
-ret: 0         st: 0 flags:1 dts: 1.989161 pts: 1.989161 pos:  43861 size:   239
+ret: 0         st: 0 flags:1 dts: 1.989161 pts: 1.989161 pos:  43861 size:   128
 ret: 0         st:-1 flags:0  ts: 0.883340
-ret: 0         st: 0 flags:1 dts: 0.883356 pts: 0.883356 pos:  19478 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.883356 pts: 0.883356 pos:  19478 size:   128
 ret: 0         st:-1 flags:1  ts:-0.222493
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st: 0 flags:0  ts: 2.671655
 ret:-EOF
 ret: 0         st: 0 flags:1  ts: 1.565850
-ret: 0         st: 0 flags:1 dts: 1.565850 pts: 1.565850 pos:  34527 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.565850 pts: 1.565850 pos:  34527 size:   128
 ret: 0         st:-1 flags:0  ts: 0.460008
-ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos:  10143 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos:  10143 size:   128
 ret: 0         st:-1 flags:1  ts:-0.645825
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
diff --git a/tests/ref/seek/lavf-au b/tests/ref/seek/lavf-au
index 8edce58f65..6ac6192738 100644
--- a/tests/ref/seek/lavf-au
+++ b/tests/ref/seek/lavf-au
@@ -1,53 +1,53 @@
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:   512
 ret: 0         st:-1 flags:0  ts:-1.000000
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:   512
 ret: 0         st:-1 flags:1  ts: 1.894167
 ret:-EOF
 ret: 0         st: 0 flags:0  ts: 0.788345
-ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos:  69572 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos:  69572 size:   512
 ret: 0         st: 0 flags:1  ts:-0.317506
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:   512
 ret: 0         st:-1 flags:0  ts: 2.576668
 ret:-EOF
 ret: 0         st:-1 flags:1  ts: 1.470835
 ret:-EOF
 ret: 0         st: 0 flags:0  ts: 0.365011
-ret: 0         st: 0 flags:1 dts: 0.365011 pts: 0.365011 pos:  32234 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.365011 pts: 0.365011 pos:  32234 size:   512
 ret: 0         st: 0 flags:1  ts:-0.740839
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:   512
 ret: 0         st:-1 flags:0  ts: 2.153336
 ret:-EOF
 ret: 0         st:-1 flags:1  ts: 1.047503
 ret:-EOF
 ret: 0         st: 0 flags:0  ts:-0.058322
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:   512
 ret: 0         st: 0 flags:1  ts: 2.835828
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 1.730004
 ret:-EOF
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos:  55092 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos:  55092 size:   512
 ret: 0         st: 0 flags:0  ts:-0.481655
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:   512
 ret: 0         st: 0 flags:1  ts: 2.412494
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 1.306672
 ret:-EOF
 ret: 0         st:-1 flags:1  ts: 0.200839
-ret: 0         st: 0 flags:1 dts: 0.200839 pts: 0.200839 pos:  17754 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.200839 pts: 0.200839 pos:  17754 size:   512
 ret: 0         st: 0 flags:0  ts:-0.904989
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:   512
 ret: 0         st: 0 flags:1  ts: 1.989184
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 0.883340
-ret: 0         st: 0 flags:1 dts: 0.883333 pts: 0.883333 pos:  77950 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.883333 pts: 0.883333 pos:  77950 size:   512
 ret: 0         st:-1 flags:1  ts:-0.222493
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:   512
 ret: 0         st: 0 flags:0  ts: 2.671678
 ret:-EOF
 ret: 0         st: 0 flags:1  ts: 1.565850
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 0.460008
-ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos:  40612 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos:  40612 size:   512
 ret: 0         st:-1 flags:1  ts:-0.645825
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:  2048
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     40 size:   512
diff --git a/tests/ref/seek/lavf-mov b/tests/ref/seek/lavf-mov
index 27ea7c7730..88fba97cf3 100644
--- a/tests/ref/seek/lavf-mov
+++ b/tests/ref/seek/lavf-mov
@@ -1,48 +1,48 @@
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
 ret: 0         st:-1 flags:0  ts:-1.000000
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
 ret: 0         st:-1 flags:1  ts: 1.894167
-ret: 0         st: 1 flags:1 dts: 0.952018 pts: 0.952018 pos: 326971 size:  1024
+ret: 0         st: 1 flags:1 dts: 0.946213 pts: 0.946213 pos: 326619 size:   768
 ret: 0         st: 0 flags:0  ts: 0.788359
-ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327995 size: 27834
+ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327387 size: 27834
 ret: 0         st: 0 flags:1  ts:-0.317500
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
 ret:-1         st: 1 flags:0  ts: 2.576667
 ret: 0         st: 1 flags:1  ts: 1.470839
-ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327995 size: 27834
+ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327387 size: 27834
 ret: 0         st:-1 flags:0  ts: 0.365002
-ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 165249 size: 27925
+ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 164897 size: 27925
 ret: 0         st:-1 flags:1  ts:-0.740831
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
 ret:-1         st: 0 flags:0  ts: 2.153359
 ret: 0         st: 0 flags:1  ts: 1.047500
-ret: 0         st: 1 flags:1 dts: 0.952018 pts: 0.952018 pos: 326971 size:  1024
+ret: 0         st: 1 flags:1 dts: 0.946213 pts: 0.946213 pos: 326619 size:   768
 ret: 0         st: 1 flags:0  ts:-0.058322
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
 ret: 0         st: 1 flags:1  ts: 2.835828
-ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327995 size: 27834
+ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327387 size: 27834
 ret:-1         st:-1 flags:0  ts: 1.730004
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 1 flags:1 dts: 0.464399 pts: 0.464399 pos: 164225 size:  1024
+ret: 0         st: 1 flags:1 dts: 0.464399 pts: 0.464399 pos: 164129 size:   768
 ret: 0         st: 0 flags:0  ts:-0.481641
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
 ret: 0         st: 0 flags:1  ts: 2.412500
-ret: 0         st: 1 flags:1 dts: 0.952018 pts: 0.952018 pos: 326971 size:  1024
+ret: 0         st: 1 flags:1 dts: 0.946213 pts: 0.946213 pos: 326619 size:   768
 ret:-1         st: 1 flags:0  ts: 1.306667
 ret: 0         st: 1 flags:1  ts: 0.200839
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
 ret: 0         st:-1 flags:0  ts:-0.904994
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
 ret: 0         st:-1 flags:1  ts: 1.989173
-ret: 0         st: 1 flags:1 dts: 0.952018 pts: 0.952018 pos: 326971 size:  1024
+ret: 0         st: 1 flags:1 dts: 0.946213 pts: 0.946213 pos: 326619 size:   768
 ret: 0         st: 0 flags:0  ts: 0.883359
-ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327995 size: 27834
+ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327387 size: 27834
 ret: 0         st: 0 flags:1  ts:-0.222500
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
 ret:-1         st: 1 flags:0  ts: 2.671678
 ret: 0         st: 1 flags:1  ts: 1.565850
-ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327995 size: 27834
+ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 327387 size: 27834
 ret: 0         st:-1 flags:0  ts: 0.460008
-ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 165249 size: 27925
+ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 164897 size: 27925
 ret: 0         st:-1 flags:1  ts:-0.645825
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1767 size: 27837
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:   1671 size: 27837
diff --git a/tests/ref/seek/lavf-mulaw b/tests/ref/seek/lavf-mulaw
index 4b1f8fbc02..e46de928a2 100644
--- a/tests/ref/seek/lavf-mulaw
+++ b/tests/ref/seek/lavf-mulaw
@@ -1,53 +1,53 @@
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st:-1 flags:0  ts:-1.000000
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st:-1 flags:1  ts: 1.894167
-ret: 0         st: 0 flags:1 dts: 1.894150 pts: 1.894150 pos:  41766 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.894150 pts: 1.894150 pos:  41766 size:   128
 ret: 0         st: 0 flags:0  ts: 0.788345
-ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos:  17383 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.788345 pts: 0.788345 pos:  17383 size:   128
 ret: 0         st: 0 flags:1  ts:-0.317506
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st:-1 flags:0  ts: 2.576668
 ret:-EOF
 ret: 0         st:-1 flags:1  ts: 1.470835
-ret: 0         st: 0 flags:1 dts: 1.470839 pts: 1.470839 pos:  32432 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.470839 pts: 1.470839 pos:  32432 size:   128
 ret: 0         st: 0 flags:0  ts: 0.364989
-ret: 0         st: 0 flags:1 dts: 0.364989 pts: 0.364989 pos:   8048 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.364989 pts: 0.364989 pos:   8048 size:   128
 ret: 0         st: 0 flags:1  ts:-0.740816
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st:-1 flags:0  ts: 2.153336
 ret:-EOF
 ret: 0         st:-1 flags:1  ts: 1.047503
-ret: 0         st: 0 flags:1 dts: 1.047483 pts: 1.047483 pos:  23097 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.047483 pts: 1.047483 pos:  23097 size:   128
 ret: 0         st: 0 flags:0  ts:-0.058322
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st: 0 flags:1  ts: 2.835828
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 1.730004
-ret: 0         st: 0 flags:1 dts: 1.730023 pts: 1.730023 pos:  38147 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.730023 pts: 1.730023 pos:  38147 size:   128
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos:  13763 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.624172 pts: 0.624172 pos:  13763 size:   128
 ret: 0         st: 0 flags:0  ts:-0.481678
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st: 0 flags:1  ts: 2.412517
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 1.306672
-ret: 0         st: 0 flags:1 dts: 1.306667 pts: 1.306667 pos:  28812 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.306667 pts: 1.306667 pos:  28812 size:   128
 ret: 0         st:-1 flags:1  ts: 0.200839
-ret: 0         st: 0 flags:1 dts: 0.200816 pts: 0.200816 pos:   4428 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.200816 pts: 0.200816 pos:   4428 size:   128
 ret: 0         st: 0 flags:0  ts:-0.904989
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st: 0 flags:1  ts: 1.989161
-ret: 0         st: 0 flags:1 dts: 1.989161 pts: 1.989161 pos:  43861 size:   239
+ret: 0         st: 0 flags:1 dts: 1.989161 pts: 1.989161 pos:  43861 size:   128
 ret: 0         st:-1 flags:0  ts: 0.883340
-ret: 0         st: 0 flags:1 dts: 0.883356 pts: 0.883356 pos:  19478 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.883356 pts: 0.883356 pos:  19478 size:   128
 ret: 0         st:-1 flags:1  ts:-0.222493
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
 ret: 0         st: 0 flags:0  ts: 2.671655
 ret:-EOF
 ret: 0         st: 0 flags:1  ts: 1.565850
-ret: 0         st: 0 flags:1 dts: 1.565850 pts: 1.565850 pos:  34527 size:  1024
+ret: 0         st: 0 flags:1 dts: 1.565850 pts: 1.565850 pos:  34527 size:   128
 ret: 0         st:-1 flags:0  ts: 0.460008
-ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos:  10143 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.460000 pts: 0.460000 pos:  10143 size:   128
 ret: 0         st:-1 flags:1  ts:-0.645825
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   128
diff --git a/tests/ref/seek/lavf-voc b/tests/ref/seek/lavf-voc
index 014c251129..47d683230a 100644
--- a/tests/ref/seek/lavf-voc
+++ b/tests/ref/seek/lavf-voc
@@ -1,44 +1,44 @@
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:   256
 ret: 0         st:-1 flags:0  ts:-1.000000
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:   256
 ret: 0         st:-1 flags:1  ts: 1.894167
 ret:-EOF
 ret: 0         st: 0 flags:0  ts: 0.788330
-ret: 0         st: 0 flags:1 dts: 0.800773 pts: 0.800773 pos:  34984 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.788997 pts: 0.788997 pos:  34872 size:   256
 ret:-1         st: 0 flags:1  ts:-0.317494
 ret:-1         st:-1 flags:0  ts: 2.576668
 ret: 0         st:-1 flags:1  ts: 1.470835
 ret:-EOF
 ret: 0         st: 0 flags:0  ts: 0.365012
-ret: 0         st: 0 flags:1 dts: 0.376834 pts: 0.376834 pos:  16480 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.365058 pts: 0.365058 pos:  16152 size:   256
 ret:-1         st: 0 flags:1  ts:-0.740834
 ret:-1         st:-1 flags:0  ts: 2.153336
 ret: 0         st:-1 flags:1  ts: 1.047503
 ret:-EOF
 ret: 0         st: 0 flags:0  ts:-0.058328
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:   256
 ret: 0         st: 0 flags:1  ts: 2.835848
 ret:-EOF
 ret:-1         st:-1 flags:0  ts: 1.730004
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 0 flags:1 dts: 0.612356 pts: 0.612356 pos:  26760 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.624132 pts: 0.624132 pos:  27592 size:   256
 ret: 0         st: 0 flags:0  ts:-0.481669
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:   256
 ret: 0         st: 0 flags:1  ts: 2.412507
 ret:-EOF
 ret:-1         st:-1 flags:0  ts: 1.306672
 ret: 0         st:-1 flags:1  ts: 0.200839
-ret: 0         st: 0 flags:1 dts: 0.188417 pts: 0.188417 pos:   8256 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.200193 pts: 0.200193 pos:   8872 size:   256
 ret: 0         st: 0 flags:0  ts:-0.904986
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:   256
 ret: 0         st: 0 flags:1  ts: 1.989167
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 0.883340
-ret: 0         st: 0 flags:1 dts: 0.894981 pts: 0.894981 pos:  39096 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.889093 pts: 0.889093 pos:  39292 size:   256
 ret:-1         st:-1 flags:1  ts:-0.222493
 ret:-1         st: 0 flags:0  ts: 2.671673
 ret: 0         st: 0 flags:1  ts: 1.565849
 ret:-EOF
 ret: 0         st:-1 flags:0  ts: 0.460008
-ret: 0         st: 0 flags:1 dts: 0.471043 pts: 0.471043 pos:  20592 size:  1024
+ret: 0         st: 0 flags:1 dts: 0.465155 pts: 0.465155 pos:  20572 size:   256
 ret:-1         st:-1 flags:1  ts:-0.645825
