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Linshizhi
ffmpeg.wasm-core
Commits
d8de9d46
Commit
d8de9d46
authored
Apr 11, 2020
by
Anton Khirnov
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doc/examples/muxing: convert to new encoding API
parent
3bfe2038
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1 changed file
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39 additions
and
56 deletions
+39
-56
muxing.c
doc/examples/muxing.c
+39
-56
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doc/examples/muxing.c
View file @
d8de9d46
...
...
@@ -78,15 +78,45 @@ static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt)
pkt
->
stream_index
);
}
static
int
write_frame
(
AVFormatContext
*
fmt_ctx
,
const
AVRational
*
time_base
,
AVStream
*
st
,
AVPacket
*
pkt
)
static
int
write_frame
(
AVFormatContext
*
fmt_ctx
,
AVCodecContext
*
c
,
AVStream
*
st
,
AVFrame
*
frame
)
{
/* rescale output packet timestamp values from codec to stream timebase */
av_packet_rescale_ts
(
pkt
,
*
time_base
,
st
->
time_base
);
pkt
->
stream_index
=
st
->
index
;
int
ret
;
// send the frame to the encoder
ret
=
avcodec_send_frame
(
c
,
frame
);
if
(
ret
<
0
)
{
fprintf
(
stderr
,
"Error sending a frame to the encoder: %s
\n
"
,
av_err2str
(
ret
));
exit
(
1
);
}
while
(
ret
>=
0
)
{
AVPacket
pkt
=
{
0
};
ret
=
avcodec_receive_packet
(
c
,
&
pkt
);
if
(
ret
==
AVERROR
(
EAGAIN
)
||
ret
==
AVERROR_EOF
)
break
;
else
if
(
ret
<
0
)
{
fprintf
(
stderr
,
"Error encoding a frame: %s
\n
"
,
av_err2str
(
ret
));
exit
(
1
);
}
/* rescale output packet timestamp values from codec to stream timebase */
av_packet_rescale_ts
(
&
pkt
,
c
->
time_base
,
st
->
time_base
);
pkt
.
stream_index
=
st
->
index
;
/* Write the compressed frame to the media file. */
log_packet
(
fmt_ctx
,
pkt
);
return
av_interleaved_write_frame
(
fmt_ctx
,
pkt
);
/* Write the compressed frame to the media file. */
log_packet
(
fmt_ctx
,
&
pkt
);
ret
=
av_interleaved_write_frame
(
fmt_ctx
,
&
pkt
);
av_packet_unref
(
&
pkt
);
if
(
ret
<
0
)
{
fprintf
(
stderr
,
"Error while writing output packet: %s
\n
"
,
av_err2str
(
ret
));
exit
(
1
);
}
}
return
ret
==
AVERROR_EOF
?
1
:
0
;
}
/* Add an output stream. */
...
...
@@ -309,13 +339,10 @@ static AVFrame *get_audio_frame(OutputStream *ost)
static
int
write_audio_frame
(
AVFormatContext
*
oc
,
OutputStream
*
ost
)
{
AVCodecContext
*
c
;
AVPacket
pkt
=
{
0
};
// data and size must be 0;
AVFrame
*
frame
;
int
ret
;
int
got_packet
;
int
dst_nb_samples
;
av_init_packet
(
&
pkt
);
c
=
ost
->
enc
;
frame
=
get_audio_frame
(
ost
);
...
...
@@ -349,22 +376,7 @@ static int write_audio_frame(AVFormatContext *oc, OutputStream *ost)
ost
->
samples_count
+=
dst_nb_samples
;
}
ret
=
avcodec_encode_audio2
(
c
,
&
pkt
,
frame
,
&
got_packet
);
if
(
ret
<
0
)
{
fprintf
(
stderr
,
"Error encoding audio frame: %s
\n
"
,
av_err2str
(
ret
));
exit
(
1
);
}
if
(
got_packet
)
{
ret
=
write_frame
(
oc
,
&
c
->
time_base
,
ost
->
st
,
&
pkt
);
if
(
ret
<
0
)
{
fprintf
(
stderr
,
"Error while writing audio frame: %s
\n
"
,
av_err2str
(
ret
));
exit
(
1
);
}
}
return
(
frame
||
got_packet
)
?
0
:
1
;
return
write_frame
(
oc
,
c
,
ost
->
st
,
frame
);
}
/**************************************************************/
...
...
@@ -506,37 +518,8 @@ static AVFrame *get_video_frame(OutputStream *ost)
*/
static
int
write_video_frame
(
AVFormatContext
*
oc
,
OutputStream
*
ost
)
{
int
ret
;
AVCodecContext
*
c
;
AVFrame
*
frame
;
int
got_packet
=
0
;
AVPacket
pkt
=
{
0
};
c
=
ost
->
enc
;
frame
=
get_video_frame
(
ost
);
av_init_packet
(
&
pkt
);
/* encode the image */
ret
=
avcodec_encode_video2
(
c
,
&
pkt
,
frame
,
&
got_packet
);
if
(
ret
<
0
)
{
fprintf
(
stderr
,
"Error encoding video frame: %s
\n
"
,
av_err2str
(
ret
));
exit
(
1
);
}
if
(
got_packet
)
{
ret
=
write_frame
(
oc
,
&
c
->
time_base
,
ost
->
st
,
&
pkt
);
}
else
{
ret
=
0
;
}
if
(
ret
<
0
)
{
fprintf
(
stderr
,
"Error while writing video frame: %s
\n
"
,
av_err2str
(
ret
));
exit
(
1
);
}
return
write_frame
(
oc
,
ost
->
enc
,
ost
->
st
,
get_video_frame
(
ost
));
return
(
frame
||
got_packet
)
?
0
:
1
;
}
static
void
close_stream
(
AVFormatContext
*
oc
,
OutputStream
*
ost
)
...
...
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