Skip to content

F
ffmpeg.wasm-core
Commit 4eb0f5f6 authored by Michael Niedermayer's avatar Michael Niedermayer
Browse files
Options

nutenc: use 1/sample rate as timebase for audio instead of framesize/sample rate 

This way audio frames can be exactly stored even when they are not
aligned with timestamp 0
Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent c4dba58f
Hide whitespace changes
Inline Side-by-side
Showing with 53 additions and 40 deletions
libavformat/nutenc.c
View file @ 4eb0f5f6
......@@ -156,6 +156,13 @@ static void build_frame_code(AVFormatContext *s){
int is_audio= codec->codec_type == AVMEDIA_TYPE_AUDIO;
int intra_only= /*codec->intra_only || */is_audio;
int pred_count;
int frame_size = av_get_audio_frame_duration(codec, 0);
if (codec->codec_id == AV_CODEC_ID_VORBIS && !frame_size) {
frame_size = 64;
}
if(!frame_size)
frame_size = 1;
for(key_frame=0; key_frame<2; key_frame++){
if(intra_only && keyframe_0_esc && key_frame==0)
......@@ -185,7 +192,7 @@ static void build_frame_code(AVFormatContext *s){
ft->stream_id= stream_id;
ft->size_mul=frame_bytes + 2;
ft->size_lsb=frame_bytes + pred;
ft->pts_delta=pts;
ft->pts_delta=pts * frame_size;
ft->header_idx= find_header_idx(s, codec, frame_bytes + pred, key_frame);
start2++;
}
......@@ -195,7 +202,7 @@ static void build_frame_code(AVFormatContext *s){
ft->flags= FLAG_KEY | FLAG_SIZE_MSB;
ft->stream_id= stream_id;
ft->size_mul=1;
ft->pts_delta=1;
ft->pts_delta=frame_size;
start2++;
}
#endif
......@@ -221,6 +228,8 @@ static void build_frame_code(AVFormatContext *s){
int start3= start2 + (end2-start2)*pred / pred_count;
int end3 = start2 + (end2-start2)*(pred+1) / pred_count;
pred_table[pred] *= frame_size;
for(index=start3; index<end3; index++){
FrameCode *ft= &nut->frame_code[index];
ft->flags= FLAG_KEY*key_frame;
......@@ -653,6 +662,10 @@ static int nut_write_header(AVFormatContext *s){
AVRational time_base;
ff_parse_specific_params(st->codec, &time_base.den, &ssize, &time_base.num);
if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->sample_rate) {
time_base = (AVRational){1, st->codec->sample_rate};
}
avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
for(j=0; j<nut->time_base_count; j++){
......
tests/ref/lavf/nut
View file @ 4eb0f5f6
778e33e75965f1cb7b419a253ccd0ed8 *./tests/data/lavf/lavf.nut
319748 ./tests/data/lavf/lavf.nut
./tests/data/lavf/lavf.nut CRC=0x4780846b
6f0770a8eee4d6533d6520a1a62d3439 *./tests/data/lavf/lavf.nut
319823 ./tests/data/lavf/lavf.nut
./tests/data/lavf/lavf.nut CRC=0x3667030f
tests/ref/seek/lavf_nut
View file @ 4eb0f5f6
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 295 size: 27837
ret: 0 st: 1 flags:1 dts: 0.000000 pts: 0.000000 pos: 296 size: 208
ret: 0 st:-1 flags:0 ts:-1.000000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 295 size: 27837
ret: 0 st: 0 flags:1 dts: 0.040000 pts: 0.040000 pos: 522 size: 27837
ret: 0 st:-1 flags:1 ts: 1.894167
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st: 0 flags:0 ts: 0.800000
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st: 0 flags:1 ts:-0.320000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 295 size: 27837
ret: 0 st: 1 flags:0 ts: 2.586122
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271130 size: 209
ret: 0 st: 1 flags:1 ts: 1.462857
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271130 size: 209
ret: 0 st: 0 flags:1 dts: 0.040000 pts: 0.040000 pos: 522 size: 27837
ret: 0 st: 1 flags:0 ts: 2.576667
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271188 size: 209
ret: 0 st: 1 flags:1 ts: 1.470839
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271188 size: 209
ret: 0 st:-1 flags:0 ts: 0.365002
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st:-1 flags:1 ts:-0.740831
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 295 size: 27837
ret: 0 st: 0 flags:1 dts: 0.040000 pts: 0.040000 pos: 522 size: 27837
ret: 0 st: 0 flags:0 ts: 2.160000
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st: 0 flags:1 ts: 1.040000
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 1 flags:0 ts:-0.052245
ret: 0 st: 1 flags:1 dts: 0.000000 pts: 0.000000 pos: 28149 size: 208
ret: 0 st: 1 flags:1 ts: 2.847347
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271130 size: 209
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st: 1 flags:0 ts:-0.058322
ret: 0 st: 1 flags:1 dts: 0.000000 pts: 0.000000 pos: 296 size: 208
ret: 0 st: 1 flags:1 ts: 2.835828
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271188 size: 209
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st: 0 flags:0 ts:-0.480000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 295 size: 27837
ret: 0 st: 0 flags:1 dts: 0.040000 pts: 0.040000 pos: 522 size: 27837
ret: 0 st: 0 flags:1 ts: 2.400000
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 1 flags:0 ts: 1.306122
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271130 size: 209
ret: 0 st: 1 flags:1 ts: 0.208980
ret: 0 st: 1 flags:1 dts: 0.182857 pts: 0.182857 pos: 71817 size: 209
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st: 1 flags:0 ts: 1.306667
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271188 size: 209
ret: 0 st: 1 flags:1 ts: 0.200839
ret: 0 st: 1 flags:1 dts: 0.182857 pts: 0.182857 pos: 71851 size: 209
ret: 0 st:-1 flags:0 ts:-0.904994
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 295 size: 27837
ret: 0 st: 0 flags:1 dts: 0.040000 pts: 0.040000 pos: 522 size: 27837
ret: 0 st:-1 flags:1 ts: 1.989173
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st: 0 flags:0 ts: 0.880000
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st: 0 flags:1 ts:-0.240000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 295 size: 27837
ret: 0 st: 1 flags:0 ts: 2.664490
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271130 size: 209
ret: 0 st: 1 flags:1 ts: 1.567347
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271130 size: 209
ret: 0 st: 0 flags:1 dts: 0.040000 pts: 0.040000 pos: 522 size: 27837
ret: 0 st: 1 flags:0 ts: 2.671678
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271188 size: 209
ret: 0 st: 1 flags:1 ts: 1.565850
ret: 0 st: 1 flags:1 dts: 0.862041 pts: 0.862041 pos: 271188 size: 209
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146337 size: 27925
ret: 0 st: 0 flags:1 dts: 0.520000 pts: 0.520000 pos: 146375 size: 27925
ret: 0 st:-1 flags:1 ts:-0.645825
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 295 size: 27837
ret: 0 st: 0 flags:1 dts: 0.040000 pts: 0.040000 pos: 522 size: 27837
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment