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Sur d’autres sites (11090)
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The C++11 Thread Timer is not working
26 août 2017, par GathrosI’m trying to make a video player using SDL2 and FFmpeg API. The video is being decoded and I can display an image on screen. I can also play audio but I not doing that (I know it works, I’ve tried it).
My problem is I can’t update the image when it should be. I’m able to get the timestamps and work out the delay then send it to a thread, where it should call an window update when the time has elapsed. But all that happens is the images flash on the screen with no delay. I have even set the delay to 1 second and the images still flash, after there being 1 second of a blank window.
Here is my code :
extern "C"{
//FFmpeg libraries
#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#include <libswscale></libswscale>swscale.h>
//SDL2 libraries
#include <sdl2></sdl2>SDL.h>
}
// 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
//C++ libraries
#include <cstdio>
#include <chrono>
#include <thread>
#include <atomic>
#include <mutex>
#include
typedef struct PacketQueue {
AVPacketList *first_pkt, *last_pkt;
std::mutex mutex;
std::condition_variable convar;
} PacketQueue;
std::atomic<bool> quitting, decoded;
std::atomic delay;
Uint32 Update_Window;
int packet_queue_put(PacketQueue *q, AVPacket *pkt){
AVPacketList *pkt1;
if(av_dup_packet(pkt) < 0){
return -1;
}
pkt1 = (AVPacketList*) av_malloc(sizeof(AVPacketList));
if(!pkt1){
return -1;
}
pkt1->pkt = *pkt;
pkt1->next = NULL;
std::lock_guard lock(q->mutex);
if (!q->last_pkt){
q->first_pkt = pkt1;
}else{
q->last_pkt->next = pkt1;
}
q->last_pkt = pkt1;
q->convar.notify_all();
return 0;
}
static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block){
AVPacketList *pkt1;
int ret;
std::unique_lock lk(q->mutex);
while(1){
if(quitting){
ret = -1;
break;
}
pkt1 = q->first_pkt;
if(pkt1){
q->first_pkt = pkt1->next;
if(!q->first_pkt){
q->last_pkt = NULL;
}
*pkt = pkt1->pkt;
av_free(pkt1);
ret = 1;
break;
}else if(decoded){
ret = 0;
quitting = true;
break;
}else if(block){
q->convar.wait_for(lk, std::chrono::microseconds(50));
}else {
ret = 0;
break;
}
}
return ret;
}
void UpdateEventQueue(){
SDL_Event event;
SDL_zero(event);
event.type = Update_Window;
SDL_PushEvent(&event);
}
void VideoTimerThreadFunc(){
UpdateEventQueue();
while(!quitting){
if(delay == 0){
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}else {
std::this_thread::sleep_for(std::chrono::microseconds(delay));
UpdateEventQueue();
}
}
}
int main(int argc, char *argv[]){
AVFormatContext* FormatCtx = nullptr;
AVCodecContext* CodecCtxOrig = nullptr;
AVCodecContext* CodecCtx = nullptr;
AVCodec* Codec = nullptr;
int videoStream;
AVFrame* Frame = nullptr;
AVPacket packet;
struct SwsContext* SwsCtx = nullptr;
PacketQueue videoq;
int frameFinished;
int64_t last_pts = 0;
const AVRational ms = {1, 1000};
SDL_Event event;
SDL_Window* screen;
SDL_Renderer* renderer;
SDL_Texture* texture;
std::shared_ptr<uint8> yPlane, uPlane, vPlane;
int uvPitch;
if (argc != 2) {
fprintf(stderr, "Usage: %s <file>\n", argv[0]);
return -1;
}
// Register all formats and codecs
av_register_all();
// Initialise SDL2
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
fprintf(stderr, "Couldn't initialise SDL - %s\n", SDL_GetError());
return -1;
}
// Setting things up
quitting = false;
decoded = false;
delay = 0;
Update_Window = SDL_RegisterEvents(1);
memset(&videoq, 0, sizeof(PacketQueue));
// Open video file
if(avformat_open_input(&FormatCtx, argv[1], NULL, NULL) != 0){
fprintf(stderr, "Couldn't open file\n");
return -1; // Couldn't open file
}
// Retrieve stream information
if(avformat_find_stream_info(FormatCtx, NULL) < 0){
fprintf(stderr, "Couldn't find stream information\n");
// Close the video file
avformat_close_input(&FormatCtx);
return -1; // Couldn't find stream information
}
// Find the video stream
videoStream = av_find_best_stream(FormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
if(videoStream < 0){
fprintf(stderr, "Couldn't find video stream\n");
// Close the video file
avformat_close_input(&FormatCtx);
return -1; // Didn't find a video stream
}
// Get a pointer to the codec context for the video stream
CodecCtxOrig = FormatCtx->streams[videoStream]->codec;
// Find the decoder for the video stream
Codec = avcodec_find_decoder(CodecCtxOrig->codec_id);
if(Codec == NULL){
fprintf(stderr, "Unsupported codec\n");
// Close the codec
avcodec_close(CodecCtxOrig);
// Close the video file
avformat_close_input(&FormatCtx);
return -1; // Codec not found
}
// Copy context
CodecCtx = avcodec_alloc_context3(Codec);
if(avcodec_copy_context(CodecCtx, CodecCtxOrig) != 0){
fprintf(stderr, "Couldn't copy codec context");
// Close the codec
avcodec_close(CodecCtxOrig);
// Close the video file
avformat_close_input(&FormatCtx);
return -1; // Error copying codec context
}
// Open codec
if(avcodec_open2(CodecCtx, Codec, NULL) < 0){
fprintf(stderr, "Couldn't open codec\n");
// Close the codec
avcodec_close(CodecCtx);
avcodec_close(CodecCtxOrig);
// Close the video file
avformat_close_input(&FormatCtx);
return -1; // Could not open codec
}
// Allocate video frame
Frame = av_frame_alloc();
// Make a screen to put our video
screen = SDL_CreateWindow("Video Player", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, CodecCtx->width, CodecCtx->height, 0);
if(!screen){
fprintf(stderr, "SDL: could not create window - exiting\n");
quitting = true;
// Clean up SDL2
SDL_Quit();
// Free the YUV frame
av_frame_free(&Frame);
// Close the codec
avcodec_close(CodecCtx);
avcodec_close(CodecCtxOrig);
// Close the video file
avformat_close_input(&FormatCtx);
return -1;
}
renderer = SDL_CreateRenderer(screen, -1, 0);
if(!renderer){
fprintf(stderr, "SDL: could not create renderer - exiting\n");
quitting = true;
// Clean up SDL2
SDL_DestroyWindow(screen);
SDL_Quit();
// Free the YUV frame
av_frame_free(&Frame);
// Close the codec
avcodec_close(CodecCtx);
avcodec_close(CodecCtxOrig);
// Close the video file
avformat_close_input(&FormatCtx);
return -1;
}
// Allocate a place to put our YUV image on that screen
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING, CodecCtx->width, CodecCtx->height);
if(!texture){
fprintf(stderr, "SDL: could not create texture - exiting\n");
quitting = true;
// Clean up SDL2
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(screen);
SDL_Quit();
// Free the YUV frame
av_frame_free(&Frame);
// Close the codec
avcodec_close(CodecCtx);
avcodec_close(CodecCtxOrig);
// Close the video file
avformat_close_input(&FormatCtx);
return -1;
}
// Initialise SWS context for software scaling
SwsCtx = sws_getContext(CodecCtx->width, CodecCtx->height, CodecCtx->pix_fmt,
CodecCtx->width, CodecCtx->height, PIX_FMT_YUV420P, SWS_BILINEAR, NULL, NULL, NULL);
if(!SwsCtx){
fprintf(stderr, "Couldn't create sws context\n");
quitting = true;
// Clean up SDL2
SDL_DestroyTexture(texture);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(screen);
SDL_Quit();
// Free the YUV frame
av_frame_free(&Frame);
// Close the codec
avcodec_close(CodecCtx);
avcodec_close(CodecCtxOrig);
// Close the video file
avformat_close_input(&FormatCtx);
return -1;
}
// set up YV12 pixel array (12 bits per pixel)
yPlane = std::shared_ptr<uint8>((Uint8 *)::operator new (CodecCtx->width * CodecCtx->height, std::nothrow));
uPlane = std::shared_ptr<uint8>((Uint8 *)::operator new (CodecCtx->width * CodecCtx->height / 4, std::nothrow));
vPlane = std::shared_ptr<uint8>((Uint8 *)::operator new (CodecCtx->width * CodecCtx->height / 4, std::nothrow));
uvPitch = CodecCtx->width / 2;
if (!yPlane || !uPlane || !vPlane) {
fprintf(stderr, "Could not allocate pixel buffers - exiting\n");
quitting = true;
// Clean up SDL2
SDL_DestroyTexture(texture);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(screen);
SDL_Quit();
// Free the YUV frame
av_frame_free(&Frame);
// Close the codec
avcodec_close(CodecCtx);
avcodec_close(CodecCtxOrig);
// Close the video file
avformat_close_input(&FormatCtx);
return -1;
}
std::thread VideoTimer (VideoTimerThreadFunc);
while (!quitting) {
// Check for more packets
if(av_read_frame(FormatCtx, &packet) >= 0){
// Check what stream it belongs to
if (packet.stream_index == videoStream) {
packet_queue_put(&videoq, &packet);
}else{
// Free the packet that was allocated by av_read_frame
av_free_packet(&packet);
}
}else {
decoded = true;
}
SDL_PollEvent(&event);
if(event.type == Update_Window){
// Getting packet
if(packet_queue_get(&videoq, &packet, 0)){
// Decode video frame
avcodec_decode_video2(CodecCtx, Frame, &frameFinished, &packet);
// Did we get a video frame?
if (frameFinished) {
AVPicture pict;
pict.data[0] = yPlane.get();
pict.data[1] = uPlane.get();
pict.data[2] = vPlane.get();
pict.linesize[0] = CodecCtx->width;
pict.linesize[1] = uvPitch;
pict.linesize[2] = uvPitch;
// Convert the image into YUV format that SDL uses
sws_scale(SwsCtx, (uint8_t const * const *) Frame->data, Frame->linesize, 0, CodecCtx->height, pict.data, pict.linesize);
SDL_UpdateYUVTexture(texture, NULL, yPlane.get(), CodecCtx->width, uPlane.get(), uvPitch, vPlane.get(), uvPitch);
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderPresent(renderer);
// Calculating delay
delay = av_rescale_q(packet.dts, CodecCtx->time_base, ms) - last_pts;
last_pts = av_rescale_q(packet.dts, CodecCtx->time_base, ms);
}else{
//UpdateEventQueue();
delay = 1;
}
// Free the packet that was allocated by av_read_frame
av_free_packet(&packet);
}else{
//UpdateEventQueue();
}
}
switch (event.type) {
case SDL_QUIT:
quitting = true;
break;
default:
break;
}
}
VideoTimer.join();
//SDL2 clean up
SDL_DestroyTexture(texture);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(screen);
SDL_Quit();
// Free the YUV frame
av_frame_free(&Frame);
// Free Sws
sws_freeContext(SwsCtx);
// Close the codec
avcodec_close(CodecCtx);
avcodec_close(CodecCtxOrig);
// Close the video file
avformat_close_input(&FormatCtx);
return 0;
}
</uint8></uint8></uint8></file></uint8></bool></mutex></atomic></thread></chrono></cstdio> -
ffmpeg - splitting, overlaying and selecting frame range in multiple input/outputs with complex video filter producing empty output
11 octobre 2017, par Josep CarnerI am trying to use ffmpeg to apply multiple filters -single input, multiple outputs-. In concrete, I am splitting the output in two, then applying an overlaying patch to one of those streams, split again and select a time range. The command I am using is :
ffmpeg \
-i ./dataset_test/videos/jz_10_huron_barstow.mkv \
-an \
-sn \
-loglevel error \
-filter_complex \
"[0:v]split=2[L_in][F_in];
[L_in]
crop=226:307:21:74,scale=200x200,setdar=200:200,split=2\
[L_in_0][L_in_1];\
color=#808080:226x307,setpts=PTS-STARTPTS[L_PATCH];\
[F_in][L_PATCH]
overlay=21:74:shortest=1,scale=200x200,setdar=200:200,split=2\
[F_in_0][F_in_1];\
[F_in_0]select='between(t\,32\,212)',select='not(mod(n\,20))',setpts=(PTS-STARTPTS)/20[F_0];\
[F_in_1]select='between(t\,213\,393)',select='not(mod(n\,20))',setpts=(PTS-STARTPTS)/20[F_1];\
[L_in_0]select='between(t\,32\,212)',select='not(mod(n\,20))',setpts=(PTS-STARTPTS)/20[L_0];\
[L_in_1]select='between(t\,213\,393)',select='not(mod(n\,20))',setpts=(PTS-STARTPTS)/20[L_1]\
"\
-map [F_0] -an -sn ./out/jz_10_huron_barstow/F/0_F.mp4\
-map [F_1] -an -sn ./out/jz_10_huron_barstow/F/1_F.mp4\
-map [L_0] -an -sn ./out/jz_10_huron_barstow/L/0_L.mp4\
-map [L_1] -an -sn ./out/jz_10_huron_barstow/L/1_L.mp4\For some reason, 0_F.mp4 is empty and 1_F.mp4 is cropped. My intuition is that it has something to do with applying splitting + overlaying + selecting. I think at some point some filter before select is changing the PTS of the frames in some way select is not properly discarding them, but I honestly don’t know how to solve it. Some insights :
-
L_0 and L_1 are fine (no overlay is used in those two)
-
If I suppress L outputs everything works fine (no "split" is needed at the beginning)
Could someone provide some light ? I don’t really know what else to try.
The logs with loglevel 40 are (some repeated lines ommited) :ffmpeg version 2.8.1 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 9.0.0 (clang-900.0.37)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.1_1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, matroska,webm, from './dataset_test/videos/jz_10_huron_barstow.mkv':
Metadata:
ENCODER : Lavf57.66.104
Duration: 00:24:04.14, start: 0.000000, bitrate: 2117 kb/s
Stream #0:0: Video: h264 (Main), 1 reference frame, yuv420p, 1440x900 (1440x912) [SAR 1:1 DAR 8:5], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
Metadata:
ENCODER : Lavc57.83.100 h264_nvenc
DURATION : 00:24:04.102000000
Stream #0:1: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s (default)
Metadata:
ENCODER : Lavc57.83.100 ac3
DURATION : 00:24:04.135000000
[Parsed_scale_2 @ 0x7fdfd2403d20] w:200 h:200 flags:'bilinear' interl:0
[Parsed_setdar_3 @ 0x7fdfd240ad80] num:den syntax is deprecated, please use num/den or named options instead
[Parsed_color_5 @ 0x7fdfd24096a0] size:226x307 rate:25/1 duration:-1.000000 sar:1/1
[Parsed_scale_8 @ 0x7fdfd24092c0] w:200 h:200 flags:'bilinear' interl:0
[Parsed_setdar_9 @ 0x7fdfd240b360] num:den syntax is deprecated, please use num/den or named options instead
[Parsed_scale_2 @ 0x7fdfd2509b00] w:200 h:200 flags:'bilinear' interl:0
[Parsed_setdar_3 @ 0x7fdfd25092c0] num:den syntax is deprecated, please use num/den or named options instead
[Parsed_color_5 @ 0x7fdfd250a520] size:226x307 rate:25/1 duration:-1.000000 sar:1/1
[Parsed_scale_8 @ 0x7fdfd250b620] w:200 h:200 flags:'bilinear' interl:0
[Parsed_setdar_9 @ 0x7fdfd250a960] num:den syntax is deprecated, please use num/den or named options instead
[graph 0 input from stream 0:0 @ 0x7fdfd2511360] w:1440 h:900 pixfmt:yuv420p tb:1/1000 fr:30/1 sar:1/1 sws_param:flags=2
[Parsed_crop_1 @ 0x7fdfd2509c80] w:1440 h:900 sar:1/1 -> w:226 h:306 sar:1/1
[Parsed_scale_2 @ 0x7fdfd2509b00] w:226 h:306 fmt:yuv420p sar:1/1 -> w:200 h:200 fmt:yuv420p sar:113/153 flags:0x2
[Parsed_setdar_3 @ 0x7fdfd25092c0] w:200 h:200 dar:113/153 sar:113/153 -> dar:1/1 sar:1/1
[Parsed_select_21 @ 0x7fdfd250a760] TB:0.001000 FRAME_RATE:30.000000 SAMPLE_RATE:nan
[Parsed_select_18 @ 0x7fdfd250a080] TB:0.001000 FRAME_RATE:30.000000 SAMPLE_RATE:nan
[Parsed_color_5 @ 0x7fdfd250a520] TB:0.040000 FRAME_RATE:25.000000 SAMPLE_RATE:nan
[Parsed_overlay_7 @ 0x7fdfd250b020] main w:1440 h:900 fmt:yuv420p overlay w:226 h:306 fmt:yuva420p eof_action:endall
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Selected 1/1000 time base
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Sync level 2
[Parsed_scale_8 @ 0x7fdfd250b620] w:1440 h:900 fmt:yuv420p sar:1/1 -> w:200 h:200 fmt:yuv420p sar:8/5 flags:0x2
[Parsed_setdar_9 @ 0x7fdfd250a960] w:200 h:200 dar:8/5 sar:8/5 -> dar:1/1 sar:1/1
[Parsed_select_15 @ 0x7fdfd250dd00] TB:0.001000 FRAME_RATE:30.000000 SAMPLE_RATE:nan
[Parsed_select_12 @ 0x7fdfd250ca60] TB:0.001000 FRAME_RATE:30.000000 SAMPLE_RATE:nan
[libx264 @ 0x7fdfd4005e00] using SAR=1/1
[libx264 @ 0x7fdfd4005e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7fdfd4005e00] profile High, level 1.2
[libx264 @ 0x7fdfd4005e00] 264 - core 148 r2601 a0cd7d3 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[libx264 @ 0x7fdfd400f600] using SAR=1/1
[libx264 @ 0x7fdfd400f600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7fdfd400f600] profile High, level 1.2
[libx264 @ 0x7fdfd400f600] 264 - core 148 r2601 a0cd7d3 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[libx264 @ 0x7fdfd4018e00] using SAR=1/1
[libx264 @ 0x7fdfd4018e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7fdfd4018e00] profile High, level 1.2
[libx264 @ 0x7fdfd4018e00] 264 - core 148 r2601 a0cd7d3 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[libx264 @ 0x7fdfd4022600] using SAR=1/1
[libx264 @ 0x7fdfd4022600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7fdfd4022600] profile High, level 1.2
[libx264 @ 0x7fdfd4022600] 264 - core 148 r2601 a0cd7d3 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to './out/jz_10_huron_barstow/F/0_F.mp4':
Metadata:
encoder : Lavf56.40.101
Stream #0:0: Video: h264 (libx264), -1 reference frame ([33][0][0][0] / 0x0021), yuv420p, 200x200 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
encoder : Lavc56.60.100 libx264
Output #1, mp4, to './out/jz_10_huron_barstow/F/1_F.mp4':
Metadata:
encoder : Lavf56.40.101
Stream #1:0: Video: h264 (libx264), -1 reference frame ([33][0][0][0] / 0x0021), yuv420p, 200x200 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
encoder : Lavc56.60.100 libx264
Output #2, mp4, to './out/jz_10_huron_barstow/L/0_L.mp4':
Metadata:
encoder : Lavf56.40.101
Stream #2:0: Video: h264 (libx264), -1 reference frame ([33][0][0][0] / 0x0021), yuv420p, 200x200 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
encoder : Lavc56.60.100 libx264
Output #3, mp4, to './out/jz_10_huron_barstow/L/1_L.mp4':
Metadata:
encoder : Lavf56.40.101
Stream #3:0: Video: h264 (libx264), -1 reference frame ([33][0][0][0] / 0x0021), yuv420p, 200x200 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
encoder : Lavc56.60.100 libx264
Stream mapping:
Stream #0:0 (h264) -> split
setpts -> Stream #0:0 (libx264)
setpts -> Stream #1:0 (libx264)
setpts -> Stream #2:0 (libx264)
setpts -> Stream #3:0 (libx264)
Press [q] to stop, [?] for help
[swscaler @ 0x7fdfd3800000] Warning: data is not aligned! This can lead to a speedloss
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 210 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 262 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 239 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 195 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 211 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 255 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 148 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 174 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 182 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 193 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:00.26 bitrate= 1.4kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 156 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:00.53 bitrate= 0.7kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 154 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:00.76 bitrate= 0.5kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 155 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:01.03 bitrate= 0.4kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 231 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:01.43 bitrate= 0.3kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 260 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:01.86 bitrate= 0.2kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 256 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:02.30 bitrate= 0.2kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 209 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:02.63 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 253 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:03.06 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 160 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:03.33 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 189 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:03.63 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 201 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:03.96 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 251 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:04.40 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 246 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:04.80 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 257 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:05.23 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 258 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:05.66 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 251 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:06.10 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 274 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:06.56 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 282 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:07.03 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Buffer queue overflow, dropping.
Last message repeated 185 times
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=0.0 q=29.0 q=0.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
frame= 0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
[…]
frame= 0 fps=0.0 q=0.0 q=29.0 q=29.0 q=29.0 size= 0kB time=00:00:07.26 bitrate= 0.1kbits/s
[Parsed_overlay_7 @ 0x7fdfd250b020] [framesync @ 0x7fdfd250b708] Sync level 1
No more output streams to write to, finishing.
frame= 0 fps=0.0 q=0.0 Lq=-1.0 q=-1.0 q=-1.0 size= 0kB time=00:00:08.93 bitrate= 0.2kbits/s
video:620kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (./dataset_test/videos/jz_10_huron_barstow.mkv):
Input stream #0:0 (video): 43323 packets read (347030822 bytes); 43323 frames decoded;
Input stream #0:1 (audio): 4 packets read (3072 bytes);
Total: 43327 packets (347033894 bytes) demuxed
Output file #0 (./out/jz_10_huron_barstow/F/0_F.mp4):
Output stream #0:0 (video): 0 frames encoded; 0 packets muxed (0 bytes);
Total: 0 packets (0 bytes) muxed
Output file #1 (./out/jz_10_huron_barstow/F/1_F.mp4):
Output stream #1:0 (video): 270 frames encoded; 270 packets muxed (309743 bytes);
Total: 270 packets (309743 bytes) muxed
Output file #2 (./out/jz_10_huron_barstow/L/0_L.mp4):
Output stream #2:0 (video): 270 frames encoded; 270 packets muxed (169687 bytes);
Total: 270 packets (169687 bytes) muxed
Output file #3 (./out/jz_10_huron_barstow/L/1_L.mp4):
Output stream #3:0 (video): 270 frames encoded; 270 packets muxed (155502 bytes);
Total: 270 packets (155502 bytes) muxed
[libx264 @ 0x7fdfd400f600] frame I:2 Avg QP:25.08 size: 3204
[libx264 @ 0x7fdfd400f600] frame P:140 Avg QP:26.63 size: 1426
[libx264 @ 0x7fdfd400f600] frame B:128 Avg QP:28.64 size: 805
[libx264 @ 0x7fdfd400f600] consecutive B-frames: 5.2% 94.8% 0.0% 0.0%
[libx264 @ 0x7fdfd400f600] mb I I16..4: 8.6% 62.7% 28.7%
[libx264 @ 0x7fdfd400f600] mb P I16..4: 2.5% 12.5% 3.4% P16..4: 39.2% 21.4% 9.3% 0.0% 0.0% skip:11.6%
[libx264 @ 0x7fdfd400f600] mb B I16..4: 0.5% 4.0% 1.0% B16..8: 36.5% 16.7% 4.0% direct: 5.5% skip:31.8% L0:43.4% L1:46.9% BI: 9.7%
[libx264 @ 0x7fdfd400f600] 8x8 transform intra:68.6% inter:67.7%
[libx264 @ 0x7fdfd400f600] coded y,uvDC,uvAC intra: 63.1% 48.6% 17.9% inter: 34.5% 21.1% 3.6%
[libx264 @ 0x7fdfd400f600] i16 v,h,dc,p: 24% 23% 12% 41%
[libx264 @ 0x7fdfd400f600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 19% 26% 7% 5% 5% 7% 6% 8%
[libx264 @ 0x7fdfd400f600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 29% 18% 6% 6% 5% 5% 4% 5%
[libx264 @ 0x7fdfd400f600] i8c dc,h,v,p: 63% 21% 14% 3%
[libx264 @ 0x7fdfd400f600] Weighted P-Frames: Y:14.3% UV:1.4%
[libx264 @ 0x7fdfd400f600] ref P L0: 49.2% 20.4% 17.3% 11.2% 1.9%
[libx264 @ 0x7fdfd400f600] ref B L0: 75.4% 24.6%
[libx264 @ 0x7fdfd400f600] kb/s:274.71
[libx264 @ 0x7fdfd4018e00] frame I:2 Avg QP:23.87 size: 2294
[libx264 @ 0x7fdfd4018e00] frame P:133 Avg QP:25.45 size: 864
[libx264 @ 0x7fdfd4018e00] frame B:135 Avg QP:28.99 size: 367
[libx264 @ 0x7fdfd4018e00] consecutive B-frames: 17.4% 38.5% 27.8% 16.3%
[libx264 @ 0x7fdfd4018e00] mb I I16..4: 14.5% 54.1% 31.4%
[libx264 @ 0x7fdfd4018e00] mb P I16..4: 6.4% 9.6% 2.1% P16..4: 33.3% 16.7% 5.9% 0.0% 0.0% skip:26.0%
[libx264 @ 0x7fdfd4018e00] mb B I16..4: 1.6% 2.0% 0.3% B16..8: 29.6% 9.3% 1.4% direct: 2.2% skip:53.6% L0:41.9% L1:51.4% BI: 6.7%
[libx264 @ 0x7fdfd4018e00] 8x8 transform intra:52.8% inter:73.8%
[libx264 @ 0x7fdfd4018e00] coded y,uvDC,uvAC intra: 40.7% 41.7% 8.9% inter: 20.7% 16.6% 0.2%
[libx264 @ 0x7fdfd4018e00] i16 v,h,dc,p: 22% 50% 8% 21%
[libx264 @ 0x7fdfd4018e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 30% 23% 6% 2% 2% 5% 5% 9%
[libx264 @ 0x7fdfd4018e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 29% 14% 5% 3% 4% 5% 6% 5%
[libx264 @ 0x7fdfd4018e00] i8c dc,h,v,p: 62% 23% 12% 3%
[libx264 @ 0x7fdfd4018e00] Weighted P-Frames: Y:1.5% UV:0.8%
[libx264 @ 0x7fdfd4018e00] ref P L0: 56.1% 15.8% 17.7% 10.2% 0.1%
[libx264 @ 0x7fdfd4018e00] ref B L0: 75.4% 20.8% 3.9%
[libx264 @ 0x7fdfd4018e00] ref B L1: 92.6% 7.4%
[libx264 @ 0x7fdfd4018e00] kb/s:150.22
[libx264 @ 0x7fdfd4022600] frame I:2 Avg QP:23.86 size: 2208
[libx264 @ 0x7fdfd4022600] frame P:139 Avg QP:24.90 size: 784
[libx264 @ 0x7fdfd4022600] frame B:129 Avg QP:28.25 size: 322
[libx264 @ 0x7fdfd4022600] consecutive B-frames: 17.8% 50.4% 15.6% 16.3%
[libx264 @ 0x7fdfd4022600] mb I I16..4: 15.7% 53.3% 31.1%
[libx264 @ 0x7fdfd4022600] mb P I16..4: 8.3% 9.9% 1.5% P16..4: 33.8% 14.8% 5.0% 0.0% 0.0% skip:26.7%
[libx264 @ 0x7fdfd4022600] mb B I16..4: 1.6% 1.8% 0.1% B16..8: 28.8% 8.2% 1.1% direct: 2.1% skip:56.4% L0:45.5% L1:47.6% BI: 6.9%
[libx264 @ 0x7fdfd4022600] 8x8 transform intra:50.6% inter:75.8%
[libx264 @ 0x7fdfd4022600] coded y,uvDC,uvAC intra: 34.0% 44.3% 10.0% inter: 18.8% 17.9% 0.4%
[libx264 @ 0x7fdfd4022600] i16 v,h,dc,p: 18% 54% 8% 20%
[libx264 @ 0x7fdfd4022600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 28% 26% 6% 2% 2% 4% 5% 8%
[libx264 @ 0x7fdfd4022600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 31% 14% 4% 2% 2% 3% 7% 5%
[libx264 @ 0x7fdfd4022600] i8c dc,h,v,p: 60% 25% 13% 2%
[libx264 @ 0x7fdfd4022600] Weighted P-Frames: Y:2.2% UV:0.7%
[libx264 @ 0x7fdfd4022600] ref P L0: 57.9% 16.8% 16.1% 8.9% 0.2%
[libx264 @ 0x7fdfd4022600] ref B L0: 76.5% 21.0% 2.5%
[libx264 @ 0x7fdfd4022600] ref B L1: 95.0% 5.0%
[libx264 @ 0x7fdfd4022600] kb/s:137.61 -
-
Getting troubles when I generate rtsp stream as an output with ffmpeg from static images as an input
10 août 2013, par Ilya YevlampievI'm trying to start the rtsp stream via feeding ffmpeg with static images and feeding ffserver with ffmpeg output.
The first problem appears from the ffserver.config :
Port 12345
RTSPPort 8544
BindAddress 0.0.0.0
MaxHTTPConnections 2000
MaxClients 1000
MaxBandwidth 1000
CustomLog /var/log/ffserver-access.log
<feed>
File /tmp/videofeed.ffm
FileMaxSize 3M
#Launch ffmpeg -s 640x480 -f video4linux2 -i /dev/video0
#Launch ffmpeg http://localhost:8090/videofeed.ffm
Launch ffmpeg -loop 1 -f image2 -r 20 -b 9600 -i Janalif.jpg -t 30 http://127.0.0.1:8090/videofeed.ffm -report
ACL allow 127.0.0.1
</feed>
<stream>
Format rtsp
#rtsp://localhost:5454/test1-rtsp.mpg
Feed videofeed.ffm
#webcam.ffm
Format flv
VideoCodec flv
VideoFrameRate 30
VideoBufferSize 80000
VideoBitRate 200
VideoQMin 1
VideoQMax 5
VideoSize 640x480
PreRoll 1
NoAudio
</stream>
<stream>
Format status
</stream>Please ignore codecs etc in stream part. The problem appears for
RTSPPort, after starting the servernmapshows no binding to 8544, only 12345 port is used.8090/tcp open unknown
12345/tcp open netbusI can download mpeg stream through http from
http://localhost:12345/test1-rtsp.mpg. How can I setup 8544 port working ?and another question is about
Launchpart of the stream. Am I right, that ffserver executes the content ofLaunchline ? If so, how can i configure ffserver to wait the stream in some particular port, but start streaming at the moment I desire ?P.S. The solution looks like Säkkijärven polkka, hoowever the idea behind this construct is to provide the controlled rtsp stream to emulate the camera output. In future I plan to substitute the command line for ffmpeg with some java bindings for it to produce the program-controlled images to the camera input to test the computer vision, that's why I need a way to launch ffmpeg independently on ffserver.
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