FFmpeg
framehash.c
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1 /*
2  * Common functions for the frame{crc,md5} muxers
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
22 #include "internal.h"
23 #include "version.h"
24 
26 {
27  int i;
28 
29  if (s->nb_streams && !(s->flags & AVFMT_FLAG_BITEXACT))
30  avio_printf(s->pb, "#software: %s\n", LIBAVFORMAT_IDENT);
31  for (i = 0; i < s->nb_streams; i++) {
32  AVStream *st = s->streams[i];
33  AVCodecParameters *avctx = st->codecpar;
34  char buf[256] = { 0 };
35  avio_printf(s->pb, "#tb %d: %d/%d\n", i, st->time_base.num, st->time_base.den);
36  avio_printf(s->pb, "#media_type %d: %s\n", i, av_get_media_type_string(avctx->codec_type));
37  avio_printf(s->pb, "#codec_id %d: %s\n", i, avcodec_get_name(avctx->codec_id));
38  switch (avctx->codec_type) {
39  case AVMEDIA_TYPE_AUDIO: {
40  int ret = av_channel_layout_describe(&avctx->ch_layout, buf, sizeof(buf));
41  if (ret < 0)
42  return ret;
43  avio_printf(s->pb, "#sample_rate %d: %d\n", i,avctx->sample_rate);
44  avio_printf(s->pb, "#channel_layout_name %d: %s\n", i, buf);
45  break;
46  }
47  case AVMEDIA_TYPE_VIDEO:
48  avio_printf(s->pb, "#dimensions %d: %dx%d\n", i, avctx->width, avctx->height);
49  avio_printf(s->pb, "#sar %d: %d/%d\n", i, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
50  break;
51  }
52  }
53  return 0;
54 }
LIBAVFORMAT_IDENT
#define LIBAVFORMAT_IDENT
Definition: version.h:45
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:58
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:54
AVRational::num
int num
Numerator.
Definition: rational.h:59
av_channel_layout_describe
int av_channel_layout_describe(const AVChannelLayout *channel_layout, char *buf, size_t buf_size)
Get a human-readable string describing the channel layout properties.
Definition: channel_layout.c:778
s
#define s(width, name)
Definition: cbs_vp9.c:256
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:128
AVFormatContext
Format I/O context.
Definition: avformat.h:1216
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:978
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:213
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:178
AVStream::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:1017
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:436
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVCodecParameters::height
int height
Definition: codec_par.h:129
version.h
ret
ret
Definition: filter_design.txt:187
AVFMT_FLAG_BITEXACT
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1351
AVStream
Stream structure.
Definition: avformat.h:948
avio_printf
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
Writes a formatted string to the context.
av_get_media_type_string
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:28
channel_layout.h
AVRational::den
int den
Denominator.
Definition: rational.h:60
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:62
ff_framehash_write_header
int ff_framehash_write_header(AVFormatContext *s)
Set the timebase for each stream from the corresponding codec timebase and print it.
Definition: framehash.c:25