Dear Team,
How to build this on the visual studio 2015 environment.
With Regards
Pratap Reddy Pulugoru
Tata Consultancy Services
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From: "Bob Kirnum" <***@gmail.com>
To: "This list is about using libavcodec, libavformat, libavutil,
libavdevice and libavfilter." <libav-***@ffmpeg.org>
Date: 09/07/2018 05:57 PM
Subject: Re: [Libav-user] Issues seeking MKV file.
Sent by: "Libav-user" <libav-user-***@ffmpeg.org>
"External email. Open with Caution"
Apologies for top-posting, hopefully this reply is better.
I had a newer version of the FFmpeg source on a CentOS 7 image (we are
currently using libavformat 56.25.101). Added some debug to ffprobe.c and
it still shows the nb_index_entries as empty after the call to
avformat_open_input. MKVToolNix v26.0.0 indicates there are 10 entries in
the Cues section, each corresponding to a key frame as reported by
ffprobe.
<<
./ffprobe ./test.mkv
ffprobe version N-85966-g78aa938 Copyright (c) 2007-2017 the FFmpeg
developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
configuration: --prefix=/root/ffmpeg_build
--extra-cflags=-I/root/ffmpeg_build/include
--extra-ldflags='-L/root/ffmpeg_build/lib -ldl' --bindir=/root/bin
--pkg-config-flags=--static --enable-gpl --enable-nonfree
--enable-libfdk_aac --enable-libfreetype --enable-libmp3lame
--enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
--enable-libx265
libavutil 55. 62.100 / 55. 62.100
libavcodec 57. 95.100 / 57. 95.100
libavformat 57. 72.101 / 57. 72.101
libavdevice 57. 7.100 / 57. 7.100
libavfilter 6. 88.100 / 6. 88.100
libswscale 4. 7.101 / 4. 7.101
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100
Input #0, matroska,webm, from './test.mkv':
Metadata:
COMPATIBLE_BRANDS: isomiso2avc1mp41
MAJOR_BRAND : isom
MINOR_VERSION : 512
ENCODER : Lavf57.41.100
Duration: 00:00:40.04, start: 0.000000, bitrate: 1093 kb/s
Stream #0:0: Video: vp8, yuv420p(progressive), 1280x690, SAR 1:1 DAR
128:69, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default)
Metadata:
HANDLER_NAME : VideoHandler
ENCODER : Lavc57.48.101 libvpx
DURATION : 00:00:40.040000000
Stream #0:1: Audio: amr_nb (8[0][0][0] / 0x0038), 8000 Hz, mono, flt,
12 kb/s (default)
Metadata:
HANDLER_NAME : SoundHandler
DURATION : 00:00:39.160000000
The debug output added.
<<
fmt_ctx(0x4239960)->streams[0](nb_index_entries 1 index_entries(pos 1022
timestamp 0))
fmt_ctx(0x4239960)->streams[1](nb_index_entries 1 index_entries(pos 1022
timestamp 0))
The debug.
<<
/* bind a decoder to each input stream */
for (i = 0; i < fmt_ctx->nb_streams; i++) {
InputStream *ist = &ifile->streams[i];
AVStream *stream = fmt_ctx->streams[i];
AVCodec *codec;
ist->st = stream;
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
if (fmt_ctx->streams[i]->nb_index_entries > 0)
{
int j;
for (j = 0; j < fmt_ctx->streams[i]->nb_index_entries; j++)
{
av_log(NULL, AV_LOG_INFO,
"fmt_ctx(%p)->streams[%d](nb_index_entries %d index_entries(pos %jd
timestamp %jd))\n"
, fmt_ctx
, i
, fmt_ctx->streams[i]->nb_index_entries
, fmt_ctx->streams[i]->index_entries[j].pos
, fmt_ctx->streams[i]->index_entries[j].timestamp
);
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
if (stream->codecpar->codec_id == AV_CODEC_ID_PROBE) {
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