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Spitfire Parade - Crisis
15 mai 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Participer à sa documentation
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Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
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Why when creating video file with ffmpeg when playing the video file the video is moving very fast ?
22 août 2013, par user2704319This is how I am using the
ffmpegarguments :public void Start(string pathFileName, int BitmapRate)
{
try
{
string outPath = pathFileName;
Logger.Write("Output Video File Directory: " + outPath);
Logger.Write("Frame Rate: " + BitmapRate.ToString());
p = new NamedPipeServerStream(pipename, PipeDirection.Out, 1, PipeTransmissionMode.Byte);
b = new byte[1920 * 1080 * 3]; // some buffer for the r g and b of pixels of an image of size 720p
ProcessStartInfo psi = new ProcessStartInfo();
psi.WindowStyle = ProcessWindowStyle.Hidden;
psi.UseShellExecute = false;
psi.CreateNoWindow = true;
psi.FileName = ffmpegFileName; // the ffmpegFileName is the ffmpeg.exe !
Logger.Write("psi.FileName: " + psi.FileName);
psi.WorkingDirectory = workingDirectory;
Logger.Write("psi.WorkingDirectory: " + psi.WorkingDirectory);
psi.Arguments = @"-f rawvideo -pix_fmt bgr0 -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v libx264 -r " + BitmapRate + " " + outPath;
Logger.Write("ProcessStartInfo Arguments" + @"-f rawvideo -pix_fmt bgr0 -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v libx264 -r " + BitmapRate + " " + outPath);
//psi.RedirectStandardOutput = true;
process = Process.Start(psi);
process.EnableRaisingEvents = false;
p.WaitForConnection();
}
catch (Exception err)
{
Logger.Write("Exception Error: " + err.ToString());
}
}I guess it is something with the arguments command, but I am not sure where the problem is.
I tried to google and saw that you can use h264 or libx264 only with an mp4 output file ?How can I fix this ?
When I am running the video file on any player I see everything moving very fast.
This is a screenshot of the ffmpeg cmd window :
And this is a link for the video file it created 1.37MB size and only 3 seconds length playing it with Media Player Classic :
https://skydrive.live.com/redir?resid=EB1C71C44C3976D5 !295&authkey= !AJjCZ-zINYp7h4A
https://skydrive.live.com/redir?resid=EB1C71C44C3976D5!295&authkey=!AJjCZ-zINYp7h4AThe ffmpeg command from the cmd window :
ffmpeg version N-53885-gf97e28e Copyright (c) 2000-2013 the FFmpeg developers
built on Jun 7 2013 00:32:38 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
enable-libxvid --enable-zlib
libavutil 52. 35.100 / 52. 35.100
libavcodec 55. 15.100 / 55. 15.100
libavformat 55. 8.102 / 55. 8.102
libavdevice 55. 2.100 / 55. 2.100
libavfilter 3. 75.101 / 3. 75.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100And this is when its working :
ffmpeg version N-53885-gf97e28e Copyright (c) 2000-2013 the FFmpeg developers
built on Jun 7 2013 00:32:38 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
enable-libxvid --enable-zlib
libavutil 52. 35.100 / 52. 35.100
libavcodec 55. 15.100 / 55. 15.100
libavformat 55. 8.102 / 55. 8.102
libavdevice 55. 2.100 / 55. 2.100
libavfilter 3. 75.101 / 3. 75.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, rawvideo, from '\\.\pipe\mytestpipe':
Duration: N/A, start: 0.000000, bitrate: 1658880 kb/s
Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 1658880 k
b/s, 25 tbr, 25 tbn, 25 tbc
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 003bc420] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 003bc420] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
Output #0, avi, to 'D:\okwow.avi':
Metadata:
ISFT : Lavf55.8.102
Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p, 1920x1080,
q=-1--1, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo -> libx264)
Press [q] to stop, [?] for help
frame= 10 fps=1.9 q=0.0 size= 6kB time=00:00:00.00 bitrate=N/A -
Fade in/out gif in particular time in ffmpeg
29 juin 2016, par Ahmad Ali MukashatyI want to fade in gif file (mygif.gif) with video in every 10 minute and for 15 seconds
is there any way to implement that ?
ffmpeg -re -i test.mp4 -i logo.png -ignore_loop 0 -i mygif.gif -filter_complex
"[0][1]overlay=0:0[a];[a][2]overlay=0:H-90,scale=1920:1080" -f mpegts
udp://127.0.0.1:port -
FFmpeg RTP example code
20 juillet 2016, par JohnnylinCan anyone show me an example code of how to use FFmpeg to encode a ".mp4" video and then output to network stream using RTP(rtp ://127.0.0.1:6666). I have searched for it on google but most of them are just command line. Thanks very much.
UPDATED :
extern "C"{
#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#include <libswscale></libswscale>swscale.h>
#include <libavutil></libavutil>avutil.h>
#include <libavutil></libavutil>opt.h>
#include <libavutil></libavutil>time.h>
}
#include
#include <iostream>
#include <string>
using namespace std;
// compatibility with newer API
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55,28,1)
#define av_frame_alloc avcodec_alloc_frame
#define av_frame_free avcodec_free_frame
#endif
#define RNDTO2(X) ( ( (X) & 0xFFFFFFFE ))
#define RNDTO32(X) ( ( (X) % 32 ) ? ( ( (X) + 32 ) & 0xFFFFFFE0 ) : (X) )
//avcodec_alloc_frame is an old name
int main(int argc, char *argv[]) {
// Initalizing these to NULL prevents segfaults!
AVFormatContext *pFormatCtx = NULL;
int i, videoStream;
AVCodecContext *pCodecCtxOrig = NULL;
AVCodecContext *pCodecCtx = NULL;
AVCodec *pCodec = NULL;
AVFrame *pFrame = NULL;
AVPacket packet;
int frameFinished;
int numBytes;
struct SwsContext *sws_ctx = NULL;
int frame_index=0;
if(argc < 2) {
printf("Please provide a movie file\n");
return -1;
}
// Register all formats and codecs
av_register_all();
//initialize network video
avformat_network_init();
int errorStatus = 0;
char errorLog[128] = { 0 };
av_log_set_level(AV_LOG_TRACE);
//------------------ This is for local video file --------------
// Open video file
if(avformat_open_input(&pFormatCtx, argv[1], NULL, NULL)!=0)
return -1; // Couldn't open file
// Retrieve stream information
if(avformat_find_stream_info(pFormatCtx, NULL)<0)
return -1; // Couldn't find stream information
// Find the first video stream
videoStream=-1;
for(i=0; inb_streams; i++)
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
videoStream=i;
break;
}
// Dump information about file onto standard error
av_dump_format(pFormatCtx, 0, argv[1], 0);
if(videoStream==-1)
return -1; // Didn't find a video stream
// Get a pointer to the codec context for the video stream
pCodecCtxOrig=pFormatCtx->streams[videoStream]->codec;
// Find the decoder for the video stream
pCodec=avcodec_find_decoder(pCodecCtxOrig->codec_id);
if(pCodec==NULL) {
fprintf(stderr, "Unsupported codec!\n");
return -1; // Codec not found
}
// Copy context
pCodecCtx = avcodec_alloc_context3(pCodec);
if(avcodec_copy_context(pCodecCtx, pCodecCtxOrig) != 0) {
fprintf(stderr, "Couldn't copy codec context");
return -1; // Error copying codec context
}
// Open codec
if(avcodec_open2(pCodecCtx, pCodec, NULL)<0)
return -1; // Could not open codec
// Allocate video frame
pFrame=av_frame_alloc();
// use nvidia codec
AVCodec* en_codec = avcodec_find_encoder_by_name("nvenc");
//AVCodec* en_codec = avcodec_find_encoder(AV_CODEC_ID_H264);
AVCodecContext* nv_codec_context = avcodec_alloc_context3(en_codec);
nv_codec_context->bit_rate = 1244179;
nv_codec_context->width = 1920;
nv_codec_context->height = 1080;
nv_codec_context->time_base.num = 1;
nv_codec_context->time_base.den = 30;
nv_codec_context->gop_size = 10;
nv_codec_context->max_b_frames = 1;
nv_codec_context->keyint_min = 1;
nv_codec_context->i_quant_factor = (float)0.71;
nv_codec_context->b_frame_strategy = 20;
nv_codec_context->qcompress = (float)0.6;
nv_codec_context->qmin = 20;
nv_codec_context->qmax = 51;
nv_codec_context->max_qdiff = 4;
nv_codec_context->refs = 4;
nv_codec_context->trellis = 1;
nv_codec_context->pix_fmt = AV_PIX_FMT_YUV420P;
//nv_codec_context->codec_id = AV_CODEC_ID_H264;
//nv_codec_context->codec_type = AVMEDIA_TYPE_VIDEO;
if (avcodec_open2(nv_codec_context, en_codec,NULL) < 0) {
fprintf(stderr, "Could not open codec\n");
exit(1);
}else printf("\nH264 codec opened\n");
/******stream*******/
string m_output("rtp://147.8.179.229:6666");
AVFormatContext* m_formatContext = NULL;
AVStream* m_stream = NULL;
if (avformat_alloc_output_context2(&m_formatContext, NULL, "H264", m_output.c_str()) < 0) {
cerr << "Cannot allocate output context: "
<< av_make_error_string(errorLog, 128, errorStatus) << endl;
return -1;
}
//AVCodec* tmp_codec = avcodec_find_encoder(AV_CODEC_ID_H264);
m_stream = avformat_new_stream(m_formatContext, en_codec);
if (!m_stream) {
cerr << "Cannot create a new stream: "
<< av_make_error_string(errorLog, 128, errorStatus) << endl;
return -1;
}
av_dump_format(m_formatContext, 0, m_output.c_str(), 1);
m_stream->codec->pix_fmt = AV_PIX_FMT_YUV420P;
m_stream->codec->width = 1920;
m_stream->codec->height = 1080;
//m_stream->codec->codec_id = AV_CODEC_ID_H264;
m_stream->codec->bit_rate = 40000;
m_stream->codec->time_base.den = 30;
m_stream->codec->time_base.num = 1;
m_stream->time_base.den = 30;
m_stream->time_base.num = 1;
m_stream->codec->codec_tag = 0;
if (m_formatContext->oformat->flags & AVFMT_GLOBALHEADER)
m_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
if (!(m_formatContext->oformat->flags & AVFMT_NOFILE))
errorStatus = avio_open(&m_formatContext->pb, m_output.c_str(), AVIO_FLAG_WRITE);
if ((errorStatus) < 0) {
cerr << "Cannot open output: "
<< av_make_error_string(errorLog, 128, errorStatus) << endl;
return -1;
}
if (avformat_write_header(m_formatContext, NULL) < 0) {
cerr << "Cannot write header to stream: "
<< av_make_error_string(errorLog, 128, errorStatus) << endl;
return -1;
}
/******stream*******/
FILE *fp_yuv = NULL;
fp_yuv=fopen("output.yuv","wb+");
// Read frames and save first five frames to disk
i=0;
while(av_read_frame(pFormatCtx, &packet)>=0) {
// Is this a packet from the video stream?
if(packet.stream_index==videoStream) {
// Decode video frame
avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
// Did we get a video frame?
if(frameFinished) {
AVPacket Outpacket;
int got_packet_ptr;
av_init_packet(&Outpacket);
Outpacket.data = NULL;
Outpacket.size = 0;
int out_size = avcodec_encode_video2(nv_codec_context, &Outpacket, pFrame, &got_packet_ptr);
Outpacket.pts = av_rescale_q(pFrame->pts, m_stream->codec->time_base, m_stream->time_base);
fwrite(Outpacket.data,1,Outpacket.size,fp_yuv);
//av_write_frame(m_formatContext, &Outpacket);
av_interleaved_write_frame(m_formatContext, &Outpacket);
//Free the packet that was allocated by encoder
av_packet_unref(&Outpacket);
}
}
// Free the packet that was allocated by av_read_frame
av_packet_unref(&packet);
}
fclose(fp_yuv);
// Free the YUV frame
av_frame_free(&pFrame);
// Close the codecs
avcodec_close(pCodecCtx);
avcodec_close(pCodecCtxOrig);
avcodec_close(m_stream->codec);
avformat_free_context(m_formatContext);
// Close the video file
avformat_close_input(&pFormatCtx);
return 0;
}
</string></iostream>Above is my code for decoding a .mp4 file, outputting to a network stream through RTP. But it does not work. On the client side, I call VLC library to decode the stream ( VlcMedia(url, _instance) where url is rtp/h264 ://@147.8.179.229:6666 ). When I change the protocal to UDP, it works. However, it is not stable. The frames jumps and probably the frame lost or something wrong with the pts setting ?
UPDATED :
When I use UDP, I got this error message.
When I use RTP, I got this error message :
Not sure about how to solve this problem, Can anyone help ? Thanks very much.
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