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Sintel MP4 Surround 5.1 Full
13 mai 2011, par
Mis à jour : Février 2012
Langue : English
Type : Video
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Problem using FFmpeg to convert MKV with A/52 B audio (aka E-AC3) to AAC
5 juillet 2020, par nxl4I've got a number of MKV files which are (per VLC) encoded with A/52 B (aka E-AC3) audio codecs. I would like to convert these to AAC, but I'm having trouble doing this with FFmpeg. The command I'm running is :



ffmpeg -hwaccel auto -i original_file.mkv -y -c:v copy -c:a aac output_file.mkv



The command completes without error. However, the generated file has no audio when I play it. FFmpeg's output is as follows :



ffmpeg version 4.2.2-1ubuntu1 Copyright (c) 2000-2019 the FFmpeg developers
 built with gcc 9 (Ubuntu 9.3.0-3ubuntu1)
 configuration: --prefix=/usr --extra-version=1ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
 libavutil 56. 31.100 / 56. 31.100
 libavcodec 58. 54.100 / 58. 54.100
 libavformat 58. 29.100 / 58. 29.100
 libavdevice 58. 8.100 / 58. 8.100
 libavfilter 7. 57.100 / 7. 57.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 5.100 / 5. 5.100
 libswresample 3. 5.100 / 3. 5.100
 libpostproc 55. 5.100 / 55. 5.100
Guessed Channel Layout for Input Stream #0.1 : 5.1
Input #0, matroska,webm, from 'input_file.mkv':
 Metadata:
 encoder : libebml v1.3.5 + libmatroska v1.4.8
 creation_time : 2018-05-10T10:21:30.000000Z
 Duration: 00:42:08.15, start: 0.000000, bitrate: 3201 kb/s
 Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
 Metadata:
 BPS-eng : 2559028
 DURATION-eng : 00:42:08.151000000
 NUMBER_OF_FRAMES-eng: 60615
 NUMBER_OF_BYTES-eng: 808701337
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:1(eng): Audio: eac3, 48000 Hz, 5.1, fltp (default)
 Metadata:
 BPS-eng : 640000
 DURATION-eng : 00:42:08.096000000
 NUMBER_OF_FRAMES-eng: 79003
 NUMBER_OF_BYTES-eng: 202247680
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:2(eng): Subtitle: subrip
 Metadata:
 BPS-eng : 79
 DURATION-eng : 00:41:15.299000000
 NUMBER_OF_FRAMES-eng: 802
 NUMBER_OF_BYTES-eng: 24598
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:3(eng): Subtitle: subrip
 Metadata:
 title : SDH
 BPS-eng : 82
 DURATION-eng : 00:41:15.299000000
 NUMBER_OF_FRAMES-eng: 844
 NUMBER_OF_BYTES-eng: 25598
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
 Stream #0:1 -> #0:1 (eac3 (native) -> aac (native))
 Stream #0:2 -> #0:2 (subrip (srt) -> ass (ssa))
Press [q] to stop, [?] for help
[aac @ 0x55d0572a1740] Using a PCE to encode channel layout "5.1(side)"
Output #0, matroska, to 'output_file.mkv':
 Metadata:
 encoder : Lavf58.29.100
 Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default)
 Metadata:
 BPS-eng : 2559028
 DURATION-eng : 00:42:08.151000000
 NUMBER_OF_FRAMES-eng: 60615
 NUMBER_OF_BYTES-eng: 808701337
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:1(eng): Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, 5.1(side), fltp, 394 kb/s (default)
 Metadata:
 BPS-eng : 640000
 DURATION-eng : 00:42:08.096000000
 NUMBER_OF_FRAMES-eng: 79003
 NUMBER_OF_BYTES-eng: 202247680
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 encoder : Lavc58.54.100 aac
 Stream #0:2(eng): Subtitle: ass (ssa)
 Metadata:
 BPS-eng : 79
 DURATION-eng : 00:41:15.299000000
 NUMBER_OF_FRAMES-eng: 802
 NUMBER_OF_BYTES-eng: 24598
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 encoder : Lavc58.54.100 ssa 
video:789747kB audio:121419kB subtitle:41kB other streams:0kB global headers:1kB muxing overhead: 0.142563%
[aac @ 0x55d0572a1740] Qavg: 428.063



Any ideas what I'm doing wrong here ? In case it helps an
ffprobe -show_streamscommand run on the original file shows the following :


DL.DDP5.1.H.264-NTG.mkv
ffprobe version 4.2.2-1ubuntu1 Copyright (c) 2007-2019 the FFmpeg developers
 built with gcc 9 (Ubuntu 9.3.0-3ubuntu1)
 configuration: --prefix=/usr --extra-version=1ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
 libavutil 56. 31.100 / 56. 31.100
 libavcodec 58. 54.100 / 58. 54.100
 libavformat 58. 29.100 / 58. 29.100
 libavdevice 58. 8.100 / 58. 8.100
 libavfilter 7. 57.100 / 7. 57.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 5.100 / 5. 5.100
 libswresample 3. 5.100 / 3. 5.100
 libpostproc 55. 5.100 / 55. 5.100
Input #0, matroska,webm, from 'input_file.mkv':
 Metadata:
 encoder : libebml v1.3.5 + libmatroska v1.4.8
 creation_time : 2018-05-10T10:21:30.000000Z
 Duration: 00:42:08.15, start: 0.000000, bitrate: 3201 kb/s
 Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
 Metadata:
 BPS-eng : 2559028
 DURATION-eng : 00:42:08.151000000
 NUMBER_OF_FRAMES-eng: 60615
 NUMBER_OF_BYTES-eng: 808701337
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:1(eng): Audio: eac3, 48000 Hz, 6 channels, fltp (default)
 Metadata:
 BPS-eng : 640000
 DURATION-eng : 00:42:08.096000000
 NUMBER_OF_FRAMES-eng: 79003
 NUMBER_OF_BYTES-eng: 202247680
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:2(eng): Subtitle: subrip
 Metadata:
 BPS-eng : 79
 DURATION-eng : 00:41:15.299000000
 NUMBER_OF_FRAMES-eng: 802
 NUMBER_OF_BYTES-eng: 24598
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:3(eng): Subtitle: subrip
 Metadata:
 title : SDH
 BPS-eng : 82
 DURATION-eng : 00:41:15.299000000
 NUMBER_OF_FRAMES-eng: 844
 NUMBER_OF_BYTES-eng: 25598
 _STATISTICS_WRITING_APP-eng: mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
 _STATISTICS_WRITING_DATE_UTC-eng: 2018-05-10 10:21:30
 _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[STREAM]
index=0
codec_name=h264
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
profile=High
codec_type=video
codec_time_base=1001/48000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=1280
height=720
coded_width=1280
coded_height=720
has_b_frames=2
sample_aspect_ratio=1:1
display_aspect_ratio=16:9
pix_fmt=yuv420p
level=31
color_range=tv
color_space=bt709
color_transfer=bt709
color_primaries=bt709
chroma_location=left
field_order=progressive
timecode=N/A
refs=1
is_avc=true
nal_length_size=4
id=N/A
r_frame_rate=24000/1001
avg_frame_rate=24000/1001
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=N/A
duration=N/A
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=8
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:BPS-eng=2559028
TAG:DURATION-eng=00:42:08.151000000
TAG:NUMBER_OF_FRAMES-eng=60615
TAG:NUMBER_OF_BYTES-eng=808701337
TAG:_STATISTICS_WRITING_APP-eng=mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
TAG:_STATISTICS_WRITING_DATE_UTC-eng=2018-05-10 10:21:30
TAG:_STATISTICS_TAGS-eng=BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[/STREAM]
[STREAM]
index=1
codec_name=eac3
codec_long_name=ATSC A/52B (AC-3, E-AC-3)
profile=unknown
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
sample_fmt=fltp
sample_rate=48000
channels=6
channel_layout=unknown
bits_per_sample=0
dmix_mode=-1
ltrt_cmixlev=-1.000000
ltrt_surmixlev=-1.000000
loro_cmixlev=-1.000000
loro_surmixlev=-1.000000
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=N/A
duration=N/A
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:language=eng
TAG:BPS-eng=640000
TAG:DURATION-eng=00:42:08.096000000
TAG:NUMBER_OF_FRAMES-eng=79003
TAG:NUMBER_OF_BYTES-eng=202247680
TAG:_STATISTICS_WRITING_APP-eng=mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
TAG:_STATISTICS_WRITING_DATE_UTC-eng=2018-05-10 10:21:30
TAG:_STATISTICS_TAGS-eng=BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[/STREAM]
[STREAM]
index=2
codec_name=subrip
codec_long_name=SubRip subtitle
profile=unknown
codec_type=subtitle
codec_time_base=0/1
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=N/A
height=N/A
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=2528151
duration=2528.151000
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:language=eng
TAG:BPS-eng=79
TAG:DURATION-eng=00:41:15.299000000
TAG:NUMBER_OF_FRAMES-eng=802
TAG:NUMBER_OF_BYTES-eng=24598
TAG:_STATISTICS_WRITING_APP-eng=mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
TAG:_STATISTICS_WRITING_DATE_UTC-eng=2018-05-10 10:21:30
TAG:_STATISTICS_TAGS-eng=BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[/STREAM]
[STREAM]
index=3
codec_name=subrip
codec_long_name=SubRip subtitle
profile=unknown
codec_type=subtitle
codec_time_base=0/1
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=N/A
height=N/A
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=2528151
duration=2528.151000
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:language=eng
TAG:title=SDH
TAG:BPS-eng=82
TAG:DURATION-eng=00:41:15.299000000
TAG:NUMBER_OF_FRAMES-eng=844
TAG:NUMBER_OF_BYTES-eng=25598
TAG:_STATISTICS_WRITING_APP-eng=mkvmerge v21.0.0 ('Tardigrades Will Inherit The Earth') 64-bit
TAG:_STATISTICS_WRITING_DATE_UTC-eng=2018-05-10 10:21:30
TAG:_STATISTICS_TAGS-eng=BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
[/STREAM]



-
converting all the mp4 audio files in a folder to mp3 using ffmpeg [duplicate]
14 septembre 2023, par Raulphow can I convert all of the
mp4files in a given folder tomp3using ffmpeg.
Almost all of the links I have seen on google is all about converting mp4 video to mp3.
I can do this via VLC player but I have got huge collection 1000 mp4 audio files and want this to be done over command line by some script or command.
Is it possible to do it via gstreamer ?

-
ffmpeg avcodec_encode_video2 hangs when using Quick Sync h264_qsv encoder
9 juin 2020, par Mike SimpsonWhen I use the mpeg4 or h264 encoders, I am able to successfully encode images to make a valid AVI file using the API for ffmpeg 3.1.0. However, when I use the Quick Sync encoder (h264_qsv), avcodec_encode_video2 will hang some of the time. I found that when using images that are 1920x1080, it was rare that avcodec_encode_video2 would hang. When using 256x256 images, it was very likely that the function would hang.



I have created the test code below that demonstrates the hang of avcodec_encode_video2. The code will create a 1000 frame, 256x256 AVI with a bit rate of 400000. The frames are simply allocated, so the output video should just be green frames.



The problem was observed using Windows 7 and Windows 10, using the 32-bit or 64-bit test application.



If anyone has any idea on how I can avoid the avcodec_encode_video2 hang I would be very grateful ! Thanks in advance for any assistance.



extern "C"
{
#ifndef __STDC_CONSTANT_MACROS
#define __STDC_CONSTANT_MACROS
#endif
#include "avcodec.h"
#include "avformat.h"
#include "swscale.h"
#include "avutil.h"
#include "imgutils.h"
#include "opt.h"
#include 
}

#include <iostream>


// Globals
AVCodec* m_pCodec = NULL;
AVStream *m_pStream = NULL;
AVOutputFormat* m_pFormat = NULL;
AVFormatContext* m_pFormatContext = NULL;
AVCodecContext* m_pCodecContext = NULL;
AVFrame* m_pFrame = NULL;
int m_frameIndex;

// Output format
AVPixelFormat m_pixType = AV_PIX_FMT_NV12;
// Use for mpeg4
//AVPixelFormat m_pixType = AV_PIX_FMT_YUV420P;

// Output frame rate
int m_frameRate = 30;
// Output image dimensions
int m_imageWidth = 256;
int m_imageHeight = 256;
// Number of frames to export
int m_frameCount = 1000;
// Output file name
const char* m_fileName = "c:/test/test.avi";
// Output file type
const char* m_fileType = "AVI";
// Codec name used to encode
const char* m_encoderName = "h264_qsv";
// use for mpeg4
//const char* m_encoderName = "mpeg4";
// Target bit rate
int m_targetBitRate = 400000;

void addVideoStream()
{
 m_pStream = avformat_new_stream( m_pFormatContext, m_pCodec );
 m_pStream->id = m_pFormatContext->nb_streams - 1;
 m_pStream->time_base = m_pCodecContext->time_base;
 m_pStream->codec->pix_fmt = m_pixType;
 m_pStream->codec->flags = m_pCodecContext->flags;
 m_pStream->codec->width = m_pCodecContext->width;
 m_pStream->codec->height = m_pCodecContext->height;
 m_pStream->codec->time_base = m_pCodecContext->time_base;
 m_pStream->codec->bit_rate = m_pCodecContext->bit_rate;
}

AVFrame* allocatePicture( enum AVPixelFormat pix_fmt, int width, int height )
{
 AVFrame *frame;

 frame = av_frame_alloc();

 if ( !frame )
 {
 return NULL;
 }

 frame->format = pix_fmt;
 frame->width = width;
 frame->height = height;

 int checkImage = av_image_alloc( frame->data, frame->linesize, width, height, pix_fmt, 32 );

 if ( checkImage < 0 )
 {
 return NULL;
 }

 return frame;
}

bool initialize()
{
 AVRational frameRate;
 frameRate.den = m_frameRate;
 frameRate.num = 1;

 av_register_all();

 m_pCodec = avcodec_find_encoder_by_name(m_encoderName);

 if( !m_pCodec )
 {
 return false;
 }

 m_pCodecContext = avcodec_alloc_context3( m_pCodec );
 m_pCodecContext->width = m_imageWidth;
 m_pCodecContext->height = m_imageHeight;
 m_pCodecContext->time_base = frameRate;
 m_pCodecContext->gop_size = 0;
 m_pCodecContext->pix_fmt = m_pixType;
 m_pCodecContext->codec_id = m_pCodec->id;
 m_pCodecContext->bit_rate = m_targetBitRate;

 av_opt_set( m_pCodecContext->priv_data, "+CBR", "", 0 );

 return true;
}

bool startExport()
{
 m_frameIndex = 0;
 char fakeFileName[512]; 
 int checkAllocContext = avformat_alloc_output_context2( &m_pFormatContext, NULL, m_fileType, fakeFileName );

 if ( checkAllocContext < 0 )
 {
 return false;
 }

 if ( !m_pFormatContext ) 
 {
 return false;
 }

 m_pFormat = m_pFormatContext->oformat;

 if ( m_pFormat->video_codec != AV_CODEC_ID_NONE ) 
 {
 addVideoStream();

 int checkOpen = avcodec_open2( m_pCodecContext, m_pCodec, NULL );

 if ( checkOpen < 0 )
 {
 return false;
 }

 m_pFrame = allocatePicture( m_pCodecContext->pix_fmt, m_pCodecContext->width, m_pCodecContext->height ); 
 if( !m_pFrame ) 
 {
 return false;
 }
 m_pFrame->pts = 0;
 }

 int checkOpen = avio_open( &m_pFormatContext->pb, m_fileName, AVIO_FLAG_WRITE );
 if ( checkOpen < 0 )
 {
 return false;
 }

 av_dict_set( &(m_pFormatContext->metadata), "title", "QS Test", 0 );

 int checkHeader = avformat_write_header( m_pFormatContext, NULL );
 if ( checkHeader < 0 )
 {
 return false;
 }

 return true;
}

int processFrame( AVPacket& avPacket )
{
 avPacket.stream_index = 0;
 avPacket.pts = av_rescale_q( m_pFrame->pts, m_pStream->codec->time_base, m_pStream->time_base );
 avPacket.dts = av_rescale_q( m_pFrame->pts, m_pStream->codec->time_base, m_pStream->time_base );
 m_pFrame->pts++;

 int retVal = av_interleaved_write_frame( m_pFormatContext, &avPacket );
 return retVal;
}

bool exportFrame()
{
 int success = 1;
 int result = 0;

 AVPacket avPacket;

 av_init_packet( &avPacket );
 avPacket.data = NULL;
 avPacket.size = 0;

 fflush(stdout);

 std::cout << "Before avcodec_encode_video2 for frame: " << m_frameIndex << std::endl;
 success = avcodec_encode_video2( m_pCodecContext, &avPacket, m_pFrame, &result );
 std::cout << "After avcodec_encode_video2 for frame: " << m_frameIndex << std::endl;

 if( result )
 { 
 success = processFrame( avPacket );
 }

 av_packet_unref( &avPacket );

 m_frameIndex++;
 return ( success == 0 );
}

void endExport()
{
 int result = 0;
 int success = 0;

 if (m_pFrame)
 {
 while ( success == 0 )
 {
 AVPacket avPacket;
 av_init_packet( &avPacket );
 avPacket.data = NULL;
 avPacket.size = 0;

 fflush(stdout);
 success = avcodec_encode_video2( m_pCodecContext, &avPacket, NULL, &result );

 if( result )
 { 
 success = processFrame( avPacket );
 }
 av_packet_unref( &avPacket );

 if (!result)
 {
 break;
 }
 }
 }

 if (m_pFormatContext)
 {
 av_write_trailer( m_pFormatContext );

 if( m_pFrame )
 {
 av_frame_free( &m_pFrame );
 }

 avio_closep( &m_pFormatContext->pb );
 avformat_free_context( m_pFormatContext );
 m_pFormatContext = NULL;
 }
}

void cleanup()
{
 if( m_pFrame || m_pCodecContext )
 {
 if( m_pFrame )
 {
 av_frame_free( &m_pFrame );
 }

 if( m_pCodecContext )
 {
 avcodec_close( m_pCodecContext );
 av_free( m_pCodecContext );
 }
 }
}

int main()
{
 bool success = true;
 if (initialize())
 {
 if (startExport())
 {
 for (int loop = 0; loop < m_frameCount; loop++)
 {
 if (!exportFrame())
 {
 std::cout << "Failed to export frame\n";
 success = false;
 break;
 }
 }
 endExport();
 }
 else
 {
 std::cout << "Failed to start export\n";
 success = false;
 }

 cleanup();
 }
 else
 {
 std::cout << "Failed to initialize export\n";
 success = false;
 }

 if (success)
 {
 std::cout << "Successfully exported file\n";
 }
 return 1;
}
</iostream>

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