Azzera filtri
Azzera filtri

VideoWriter Error: No frames were written to this file

3 visualizzazioni (ultimi 30 giorni)
Hello everyone,
I have this code that is supposed to write frames on a video and save it:
function rgb_array = renderDrivingEnv(time, action, xy_pos, xy_dot, xy_dotdot, ...
yaw, lane_dist, lane_curvature, lane_curvature_derivate, heading_angle, inert_angle, engine_info, rewards, scene_info, folder, baseFileName, saveVideo, impaired, testing, invert_y_and_yaw, train_gail)
% Define global variables.
global currentTimeEditField steerEditField accelEditField accelLable decelEditField decelLable rewEditField totRewEditField impLable impEditField belLable belEditField...
totRewLable rewLable egoVehicle scenario cgVel currentStepEditField writerObj hLineOffset hLineLateralDev hLineSteering hLineYaw gearEditField kmHEditField...
labLable labEditField hLineImp hPanelPlotImp;
% inizialize output
rgb_array = 0;
%% Create and set Figure Properties.
figureName = 'Simulation Rendering';
hFigure = findobj('Type','Figure','Name',figureName);
if isempty(hFigure)
% import scenario parameters
egoVehicle = evalin("base", "egoVehicle");
scenario = evalin("base", "scenario");
sampleTime = evalin("base", "sampleTime");
%% Save scenario plot
fullFileName = fullfile(folder, baseFileName);
fig = figure('doublebuffer','off','Visible','Off');
ax = axes('Parent',fig);
plot(scenario,'Parent', ax);
saveas(fig,fullFileName, 'png');
%% Initialize rendering window
screenSize = double(get(groot,'ScreenSize'));
hFigure = figure('Name',figureName);
hFigure.Position = [screenSize(3)*0.17 screenSize(4)*0.15 screenSize(3)*0.7 screenSize(4)*0.7];
hFigure.NumberTitle = 'off';
hFigure.MenuBar = 'none';
hFigure.ToolBar = 'none';
train_gail_is = train_gail
invert_y_and_yaw_is = invert_y_and_yaw
openRenderView(hFigure, egoVehicle, scenario);
updateSceneInfo(scene_info);
%% Set up the movie structure.
% Create a VideoWriter object to write the video out to a new, different file.
profile = 'MPEG-4';
% if isempty(writerObj)
file_name = fullFileName
writerObj = VideoWriter(fullFileName, profile);
writerObj.Quality = 30;
writerObj.FrameRate = 1/sampleTime;
% end
open(writerObj);
% Need to change from the default renderer to zbuffer to get it to work right.
% openGL doesn't work and Painters is way too slow.
set(gcf, 'renderer', 'zbuffer');
end
totalframes=VID.NumberOfFrames
%% Save rendering video
if saveVideo
close(hFigure);
close(writerObj);
return;
end
% Update current simulation time.
currentTimeEditField.String = strcat(num2str(time(2),'%.2f'),'s');
currentStepEditField.String = time(2)/time(1);
% Update Engine Info
if train_gail
gearEditField.String = strcat(num2str(engine_info(1),'%d'));
else
gearEditField.String = strcat(num2str(engine_info(2),'%d'));
end
kmHEditField.String = strcat(num2str(xy_dot(1)*3.6,'%.f Km/h'));
% Update current action.
if train_gail
steerEditField.String = strcat(num2str(action(1),'%.2f'));
else
steerEditField.String = strcat(num2str(deg2rad(action(1)),'%.2f'));
end
%% Update observation information .
updateObsInfo(xy_pos, xy_dot,xy_dotdot, yaw, lane_dist, heading_angle, lane_curvature, lane_curvature_derivate, engine_info);
% Some data collected had Y coordinate and yaw angle inverted
if invert_y_and_yaw
egoVehicle.Position = [xy_pos(1) -xy_pos(2) 0];
egoVehicle.Yaw = -rad2deg(yaw(1));
else
egoVehicle.Position = [xy_pos(1) xy_pos(2) 0];
egoVehicle.Yaw = rad2deg(yaw(1));
end
if train_gail
egoVehicle.Yaw = rad2deg(inert_angle(3));
end
if testing
egoVehicle.Mesh = driving.scenario.truckMesh;
else
egoVehicle.Mesh = driving.scenario.carMesh;
end
%% Update plots.
% Ego View
updatePlots(scenario);
% Write this frame out to a new video file.
% pause for frame processing...
pause(0.1)
thisFrame = getframe(hFigure);
writeVideo(writerObj, thisFrame);
end
Where it runs recurrently the file (entering only once in the "isempty" condition to create the figure)
At the end I get:
Warning: No video frames were written to this file. The file may be invalid.
Anyone know how to debug this? The videos are supposed to be long so I'm taking a really long time to debug...
Thanks.
  1 Commento
Walter Roberson
Walter Roberson il 15 Mar 2023
Could you confirm that the save video parameter is false except for the final call?

Accedi per commentare.

Risposte (1)

Sachin
Sachin il 15 Mar 2023
Based on my understanding, you are getting warning ‘No frames were written to this file’. Here are some points that might be helpful to you:
  1. Check that fullfile name is correct.
  2. May be debugger reveals some details. Type this in command window: Then run the code again.
dbstop if caught error
3. You can suppress warning to check if warning is causing the issues. Refer the following documentation for suppress - warnings
Thanks
Sachin

Categorie

Scopri di più su Convert Image Type in Help Center e File Exchange

Prodotti


Release

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by