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Bug de détection d’ogg
22 mars 2013, par
Mis à jour : Avril 2013
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Dockerized ffmpeg stops for no reason
2 mai 2023, par Arthur AttoutI'm trying to fire up a container that reads a video stream via
ffmpeg
and saves the stream as 30 seconds segments.

When I run the container, it stops after 20-ish seconds and returns with no error.


Here is my Dockerfile


FROM linuxserver/ffmpeg
ENTRYPOINT ffmpeg -i rtsp://192.168.1.85:8554/camera -f v4l2 -c copy -reset_timestamps 1 -map 0 -f segment -segment_time 30 -segment_format mp4 "output/out%03d.mp4" -loglevel debug



Here is the output when I run
sudo docker run -it --rm -v /data/camera:/output --name camera_recorder camera_recorder:latest


[+] Building 1.8s (5/5) FINISHED
 => [internal] load build definition from Dockerfile 0.3s
 => => transferring dockerfile: 777B 0.0s
 => [internal] load .dockerignore 0.5s
 => => transferring context: 2B 0.0s
 => [internal] load metadata for docker.io/linuxserver/ffmpeg:latest 1.2s
 => CACHED [1/1] FROM docker.io/linuxserver/ffmpeg@sha256:823c611e0af82b864608c21d96bf363403310d92f154e238f6d51fe3d783e53b 0.0s
 => exporting to image 0.1s
 => => exporting layers 0.0s
 => => writing image sha256:f0509ccf0b07ff53d4aafa0d3b80fd50ed53e96db906c9a1e0e8c44e163dce94 0.1s
 => => naming to docker.io/library/camera_recorder 0.0s
ffmpeg version 5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
 built with gcc 11 (Ubuntu 11.3.0-1ubuntu1~22.04)
 configuration: --disable-debug --disable-doc --disable-ffplay --enable-ffprobe --enable-cuvid --enable-gpl --enable-libaom --enable-libass --enable-libfdk_aac --enable-libfreetype --enable-libkvazaar --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libxml2 --enable-libx264 --enable-libx265 --enable-libxvid --enable-nonfree --enable-nvdec --enable-nvenc --enable-opencl --enable-openssl --enable-small --enable-stripping --enable-vaapi --enable-vdpau --enable-version3
 libavutil 57. 28.100 / 57. 28.100
 libavcodec 59. 37.100 / 59. 37.100
 libavformat 59. 27.100 / 59. 27.100
 libavdevice 59. 7.100 / 59. 7.100
 libavfilter 8. 44.100 / 8. 44.100
 libswscale 6. 7.100 / 6. 7.100
 libswresample 4. 7.100 / 4. 7.100
 libpostproc 56. 6.100 / 56. 6.100
Splitting the commandline.
Reading option '-i' ... matched as input url with argument 'rtsp://192.168.1.85:8554/camera'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'v4l2'.
Reading option '-c' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-reset_timestamps' ... matched as AVOption 'reset_timestamps' with argument '1'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'segment'.
Reading option '-segment_time' ... matched as AVOption 'segment_time' with argument '30'.
Reading option '-segment_format' ... matched as AVOption 'segment_format' with argument 'mp4'.
Reading option 'output/out%03d.mp4' ... matched as output url.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input url rtsp://192.168.1.85:8554/camera.
Successfully parsed a group of options.
Opening an input file: rtsp://192.168.1.85:8554/camera.
[tcp @ 0x55c15e3eb040] No default whitelist set
[tcp @ 0x55c15e3eb040] Original list of addresses:
[tcp @ 0x55c15e3eb040] Address 192.168.1.85 port 8554
[tcp @ 0x55c15e3eb040] Interleaved list of addresses:
[tcp @ 0x55c15e3eb040] Address 192.168.1.85 port 8554
[tcp @ 0x55c15e3eb040] Starting connection attempt to 192.168.1.85 port 8554
[tcp @ 0x55c15e3eb040] Successfully connected to 192.168.1.85 port 8554
[rtsp @ 0x55c15e3e8300] SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=Stream
c=IN IP4 0.0.0.0
t=0 0
m=video 0 RTP/AVP 96
a=control:rtsp://192.168.1.85:8554/camera/trackID=0
a=rtpmap:96 MP4V-ES/90000
a=fmtp:96 config=000001B001000001B58913000001000000012000C48D88002D3C04871443000001B24C61766335392E33372E313030; profile-level-id=1

[rtsp @ 0x55c15e3e8300] video codec set to: mpeg4
[rtp @ 0x55c15e3ef600] No default whitelist set
[udp @ 0x55c15e3f0200] No default whitelist set
[udp @ 0x55c15e3f0200] end receive buffer size reported is 425984
[udp @ 0x55c15e3eff40] No default whitelist set
[udp @ 0x55c15e3eff40] end receive buffer size reported is 425984
[rtsp @ 0x55c15e3e8300] setting jitter buffer size to 500
[rtsp @ 0x55c15e3e8300] hello state=0
[rtsp @ 0x55c15e3e8300] Could not find codec parameters for stream 0 (Video: mpeg4, 1 reference frame, none(left), 1920x1080 [SAR 1:1 DAR 16:9], 1/5): unspecified pixel format
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, rtsp, from 'rtsp://192.168.1.85:8554/camera':
 Metadata:
 title : Stream
 Duration: N/A, bitrate: N/A
 Stream #0:0, 0, 1/90000: Video: mpeg4, 1 reference frame, none(left), 1920x1080 [SAR 1:1 DAR 16:9], 0/1, 5 tbr, 90k tbn
Successfully opened the file.
Parsing a group of options: output url output/out%03d.mp4.
Applying option f (force format) with argument v4l2.
Applying option c (codec name) with argument copy.
Applying option map (set input stream mapping) with argument 0.
Applying option f (force format) with argument segment.
Successfully parsed a group of options.
Opening an output file: output/out%03d.mp4.
Successfully opened the file.
[segment @ 0x55c15e415a80] Selected stream id:0 type:video
[segment @ 0x55c15e415a80] Opening 'output/out000.mp4' for writing
[file @ 0x55c15e42d840] Setting default whitelist 'file,crypto,data'
Output #0, segment, to 'output/out%03d.mp4':
 Metadata:
 title : Stream
 encoder : Lavf59.27.100
 Stream #0:0, 0, 1/10240: Video: mpeg4, 1 reference frame, none(left), 1920x1080 (0x0) [SAR 1:1 DAR 16:9], 0/1, q=2-31, 5 tbr, 10240 tbn
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
No more output streams to write to, finishing.:00.00 bitrate=N/A speed= 0x
[segment @ 0x55c15e415a80] segment:'output/out000.mp4' count:0 ended
[AVIOContext @ 0x55c15e42d8c0] Statistics: 292 bytes written, 2 seeks, 3 writeouts
frame= 0 fps=0.0 q=-1.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed= 0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (rtsp://192.168.1.85:8554/camera):
 Input stream #0:0 (video): 0 packets read (0 bytes);
 Total: 0 packets (0 bytes) demuxed
Output file #0 (output/out%03d.mp4):
 Output stream #0:0 (video): 0 packets muxed (0 bytes);
 Total: 0 packets (0 bytes) muxed
0 frames successfully decoded, 0 decoding errors



Additional info :


- 

- The stream is up and running.
ffplay rtsp://192.168.1.85:8554/camera
opens normally - The exact command (from
ENTRYPOINT
) on the host, works perfectly fine (it generates files for every 30 seconds). - From inside the container, I can ping 192.168.1.85 (it is actually
localhost
) - Setting
-analyzeduration 1000
does not fix the issue










Why is the container stopping for no reason ?


- The stream is up and running.
-
save a serial of images(cv::Mat) to a mp4 file in Variable Frame Rate mode by using ffmpeg library, how to set the pts ?
2 mai 2023, par ollydbg23In C++ code, I can correctly save a serial of images(opencv's
cv::Mat
) to a mp4 file by usingffmpeg
library, see the question and answer here : avformat_write_header() function call crashed when I try to save several RGB data to a output.mp4 file

Now here comes another question :


Rotem' answer in that question can have the
output.mp4
saved correctly. When play the mp4 file, I see the frames(OpenCV'scv::Mat
image) shows in a const rate.

What I can do if I have got the frames not in a const frequency, for example, the I got the first frame at the
0ms
, and the second frame at the50ms
the third frame at75ms
, so that the each frame as associated time stamp, for example, those time stamp array are something like below :

int timestamp[100] = {0, 50, 75, ...};



What is the method to modify the Rotem's answer to reflect this ? It looks like I have to change the
pts
field of eachframe
. Because I just test the code, if I change this :

yuvFrame->pts = av_rescale_q(frame_count*frame_count, outCodecCtx->time_base, outStream->time_base); //Set PTS timestamp

// note I change from frame_count to frame_count*frame_count



Then the
output.mp4
plays slower and slower, because the later frame has largepts
values.

Thanks.


EDIT


This is the code I'm currently used :


#include <iostream>
#include <vector>
#include <cstring>
#include <fstream>
#include <sstream>
#include <stdexcept>
#include <opencv2></opencv2>opencv.hpp>
extern "C" {
#include <libavutil></libavutil>imgutils.h>
#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#include <libavutil></libavutil>opt.h>
}

#include<cstdlib> // to generate time stamps

using namespace std;
using namespace cv;

int main()
{
 // Set up input frames as BGR byte arrays
 vector<mat> frames;

 int width = 640;
 int height = 480;
 int num_frames = 100;
 Scalar black(0, 0, 0);
 Scalar white(255, 255, 255);
 int font = FONT_HERSHEY_SIMPLEX;
 double font_scale = 1.0;
 int thickness = 2;

 for (int i = 0; i < num_frames; i++) {
 Mat frame = Mat::zeros(height, width, CV_8UC3);
 putText(frame, std::to_string(i), Point(width / 2 - 50, height / 2), font, font_scale, white, thickness);
 frames.push_back(frame);
 }

 // generate a serial of time stamps which is used to set the PTS value
 // suppose they are in ms unit, the time interval is between 30ms to 59ms
 vector<int> timestamps;

 for (int i = 0; i < num_frames; i++) {
 int timestamp;
 if (i == 0)
 timestamp = 0;
 else
 {
 int random = 30 + (rand() % 30);
 timestamp = timestamps[i-0] + random;
 }

 timestamps.push_back(timestamp);
 }

 // Populate frames with BGR byte arrays

 // Initialize FFmpeg
 //av_register_all();

 // Set up output file
 AVFormatContext* outFormatCtx = nullptr;
 //AVCodec* outCodec = nullptr;
 AVCodecContext* outCodecCtx = nullptr;
 //AVStream* outStream = nullptr;
 //AVPacket outPacket;

 const char* outFile = "output.mp4";
 int outWidth = frames[0].cols;
 int outHeight = frames[0].rows;
 int fps = 25;

 // Open the output file context
 avformat_alloc_output_context2(&outFormatCtx, nullptr, nullptr, outFile);
 if (!outFormatCtx) {
 cerr << "Error: Could not allocate output format context" << endl;
 return -1;
 }

 // Open the output file
 if (avio_open(&outFormatCtx->pb, outFile, AVIO_FLAG_WRITE) < 0) {
 cerr << "Error opening output file" << std::endl;
 return -1;
 }

 // Set up output codec
 const AVCodec* outCodec = avcodec_find_encoder(AV_CODEC_ID_H264);
 if (!outCodec) {
 cerr << "Error: Could not find H.264 codec" << endl;
 return -1;
 }

 outCodecCtx = avcodec_alloc_context3(outCodec);
 if (!outCodecCtx) {
 cerr << "Error: Could not allocate output codec context" << endl;
 return -1;
 }
 outCodecCtx->codec_id = AV_CODEC_ID_H264;
 outCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
 outCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;
 outCodecCtx->width = outWidth;
 outCodecCtx->height = outHeight;
 outCodecCtx->time_base = { 1, fps*1000 }; // 25000
 outCodecCtx->framerate = {fps, 1}; // 25
 outCodecCtx->bit_rate = 4000000;

 //https://github.com/leandromoreira/ffmpeg-libav-tutorial
 //We set the flag AV_CODEC_FLAG_GLOBAL_HEADER which tells the encoder that it can use the global headers.
 if (outFormatCtx->oformat->flags & AVFMT_GLOBALHEADER)
 {
 outCodecCtx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; //
 }

 // Open output codec
 if (avcodec_open2(outCodecCtx, outCodec, nullptr) < 0) {
 cerr << "Error: Could not open output codec" << endl;
 return -1;
 }

 // Create output stream
 AVStream* outStream = avformat_new_stream(outFormatCtx, outCodec);
 if (!outStream) {
 cerr << "Error: Could not allocate output stream" << endl;
 return -1;
 }

 // Configure output stream parameters (e.g., time base, codec parameters, etc.)
 // ...

 // Connect output stream to format context
 outStream->codecpar->codec_id = outCodecCtx->codec_id;
 outStream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
 outStream->codecpar->width = outCodecCtx->width;
 outStream->codecpar->height = outCodecCtx->height;
 outStream->codecpar->format = outCodecCtx->pix_fmt;
 outStream->time_base = outCodecCtx->time_base;

 int ret = avcodec_parameters_from_context(outStream->codecpar, outCodecCtx);
 if (ret < 0) {
 cerr << "Error: Could not copy codec parameters to output stream" << endl;
 return -1;
 }

 outStream->avg_frame_rate = outCodecCtx->framerate;
 //outStream->id = outFormatCtx->nb_streams++; <--- We shouldn't modify outStream->id

 ret = avformat_write_header(outFormatCtx, nullptr);
 if (ret < 0) {
 cerr << "Error: Could not write output header" << endl;
 return -1;
 }

 // Convert frames to YUV format and write to output file
 int frame_count = -1;
 for (const auto& frame : frames) {
 frame_count++;
 AVFrame* yuvFrame = av_frame_alloc();
 if (!yuvFrame) {
 cerr << "Error: Could not allocate YUV frame" << endl;
 return -1;
 }
 av_image_alloc(yuvFrame->data, yuvFrame->linesize, outWidth, outHeight, AV_PIX_FMT_YUV420P, 32);

 yuvFrame->width = outWidth;
 yuvFrame->height = outHeight;
 yuvFrame->format = AV_PIX_FMT_YUV420P;

 // Convert BGR frame to YUV format
 Mat yuvMat;
 cvtColor(frame, yuvMat, COLOR_BGR2YUV_I420);
 memcpy(yuvFrame->data[0], yuvMat.data, outWidth * outHeight);
 memcpy(yuvFrame->data[1], yuvMat.data + outWidth * outHeight, outWidth * outHeight / 4);
 memcpy(yuvFrame->data[2], yuvMat.data + outWidth * outHeight * 5 / 4, outWidth * outHeight / 4);

 // Set up output packet
 //av_init_packet(&outPacket); //error C4996: 'av_init_packet': was declared deprecated
 AVPacket* outPacket = av_packet_alloc();
 memset(outPacket, 0, sizeof(outPacket)); //Use memset instead of av_init_packet (probably unnecessary).
 //outPacket->data = nullptr;
 //outPacket->size = 0;

 yuvFrame->pts = av_rescale_q(timestamps[frame_count], outCodecCtx->time_base, outStream->time_base); //Set PTS timestamp

 // Encode frame and write to output file
 int ret = avcodec_send_frame(outCodecCtx, yuvFrame);
 if (ret < 0) {
 cerr << "Error: Could not send frame to output codec" << endl;
 return -1;
 }
 while (ret >= 0) {
 ret = avcodec_receive_packet(outCodecCtx, outPacket);
 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
 break;
 } else if (ret < 0) {
 cerr << "Error: Could not receive packet from output codec" << endl;
 return -1;
 }

 //av_packet_rescale_ts(&outPacket, outCodecCtx->time_base, outStream->time_base);

 outPacket->stream_index = outStream->index;

 outPacket->duration = av_rescale_q(1, outCodecCtx->time_base, outStream->time_base); // Set packet duration

 ret = av_interleaved_write_frame(outFormatCtx, outPacket);
 av_packet_unref(outPacket);
 if (ret < 0) {
 cerr << "Error: Could not write packet to output file" << endl;
 return -1;
 }
 }

 av_frame_free(&yuvFrame);
 }

 // Flush the encoder
 ret = avcodec_send_frame(outCodecCtx, nullptr);
 if (ret < 0) {
 std::cerr << "Error flushing encoder: " << std::endl;
 return -1;
 }

 while (ret >= 0) {
 AVPacket* pkt = av_packet_alloc();
 if (!pkt) {
 std::cerr << "Error allocating packet" << std::endl;
 return -1;
 }
 ret = avcodec_receive_packet(outCodecCtx, pkt);

 // Write the packet to the output file
 if (ret == 0)
 {
 pkt->stream_index = outStream->index;
 pkt->duration = av_rescale_q(1, outCodecCtx->time_base, outStream->time_base); // <---- Set packet duration
 ret = av_interleaved_write_frame(outFormatCtx, pkt);
 av_packet_unref(pkt);
 if (ret < 0) {
 std::cerr << "Error writing packet to output file: " << std::endl;
 return -1;
 }
 }
 }


 // Write output trailer
 av_write_trailer(outFormatCtx);

 // Clean up
 avcodec_close(outCodecCtx);
 avcodec_free_context(&outCodecCtx);
 avformat_free_context(outFormatCtx);

 return 0;
}
</int></mat></cstdlib></stdexcept></sstream></fstream></cstring></vector></iostream>


Especially, I have those changes to the original Rotem's answer :


Fist, I have some code to generate a time stamp array :


// generate a serial of time stamps which is used to set the PTS value
 // suppose they are in ms unit, the time interval is between 30ms to 59ms
 vector<int> timestamps;

 for (int i = 0; i < num_frames; i++) {
 int timestamp;
 if (i == 0)
 timestamp = 0;
 else
 {
 int random = 30 + (rand() % 30);
 timestamp = timestamps[i-0] + random;
 }

 timestamps.push_back(timestamp);
 }
</int>


Second, I just set the PTS by those values :


yuvFrame->pts = av_rescale_q(timestamps[frame_count], outCodecCtx->time_base, outStream->time_base); //Set PTS timestamp



Note that I have set the fps like below :


outCodecCtx->time_base = { 1, fps*1000 }; // 25000
 outCodecCtx->framerate = {fps, 1}; // 25



Now, when I run the program, I got a lot of warnings in the console :


[libx264 @ 0000022e7fa621c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000022e7fa621c0] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0000022e7fa621c0] 264 - core 164 r3094M bfc87b7 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - 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=abr mbtree=1 bitrate=4000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] non-strictly-monotonic PTS
[libx264 @ 0000022e7fa621c0] invalid DTS: PTS is less than DTS
[mp4 @ 0000022e090b2300] pts (592) < dts (1129348497) in stream 0
Error: Could not write packet to output file



Any ideas ?
Thanks.