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Merge pull request #47 from danieljprice/mp4
mp4 device, v1.4.0
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,5 @@ | ||
| Changes in v1.3.2 | ||
| Changes in v1.4.0 | ||
| ------------------ | ||
| - bug fix with spaces at end of string causing failure on open_device in Fortran interface (#35) | ||
| - added mp4 driver, can simply give "file.mp4" as the device to generate mp4 file | ||
| - can amend flags to ffmpeg using GIZA_FFMPEG_FLAGS environment variable | ||
| - automated cleanup of temporary .png files used to make the movie |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| /* giza - a scientific plotting library built on cairo | ||
| * | ||
| * Copyright (c) 2010 James Wetter and Daniel Price | ||
| * Copyright (c) 2010-2023 Daniel Price | ||
| * | ||
| * This library is free software; and you are welcome to redistribute | ||
| * it under the terms of the GNU General Public License | ||
| * (GPL, see LICENSE file for details) and the provision that | ||
| * this notice remains intact. If you modify this file, please | ||
| * note section 2a) of the GPLv2 states that: | ||
| * | ||
| * a) You must cause the modified files to carry prominent notices | ||
| * stating that you changed the files and the date of any change. | ||
| * | ||
| * This software is distributed "AS IS", with ABSOLUTELY NO WARRANTY. | ||
| * See the GPL for specific language governing rights and limitations. | ||
| * | ||
| * The Original code is the giza plotting library. | ||
| * | ||
| * Contributor(s): | ||
| * James Wetter <wetter.j@gmail.com> | ||
| * Daniel Price <daniel.price@monash.edu> (main contact) | ||
| */ | ||
|
|
||
| void _giza_close_device_mp4 (int last); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| /* giza - a scientific plotting library built on cairo | ||
| * | ||
| * Copyright (c) 2010 James Wetter and Daniel Price | ||
| * Copyright (c) 2010-2023 Daniel Price | ||
| * | ||
| * This library is free software; and you are welcome to redistribute | ||
| * it under the terms of the GNU General Public License | ||
| * (GPL, see LICENSE file for details) and the provision that | ||
| * this notice remains intact. If you modify this file, please | ||
| * note section 2a) of the GPLv2 states that: | ||
| * | ||
| * a) You must cause the modified files to carry prominent notices | ||
| * stating that you changed the files and the date of any change. | ||
| * | ||
| * This software is distributed "AS IS", with ABSOLUTELY NO WARRANTY. | ||
| * See the GPL for specific language governing rights and limitations. | ||
| * | ||
| * The Original code is the giza plotting library. | ||
| * | ||
| * Contributor(s): | ||
| * James Wetter <wetter.j@gmail.com> | ||
| * Daniel Price <daniel.price@monash.edu> (main contact) | ||
| */ | ||
|
|
||
| #include "giza-private.h" | ||
| #include "giza-drivers-private.h" | ||
| #include "giza-io-private.h" | ||
| #include "giza-driver-png-private.h" | ||
| #include "giza-driver-mp4-private.h" | ||
| #include <giza.h> | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
| #include <stdlib.h> | ||
| #include <unistd.h> | ||
|
|
||
| #define GIZA_DEVICE_EXTENSION ".mp4" | ||
| #define GIZA_FFMPEG_FLAGS_DEFAULT "-r 10 -vb 50M -bt 100M -pix_fmt yuv420p -vf setpts=4.*PTS" | ||
|
|
||
| /** | ||
| * Closes an open mp4 device. This closes the sequence of png images | ||
| * and compiles them into a movie | ||
| */ | ||
| void | ||
| _giza_close_device_mp4 (int last) | ||
| { | ||
| _giza_close_device_png(last); | ||
| if (Dev[id].drawn && last==1) { | ||
| /* construct filename for mp4 file */ | ||
| int lenext = strlen(GIZA_DEVICE_EXTENSION); | ||
| int length = strlen(Dev[id].prefix) + lenext + 5; | ||
| char fileName[length + 1]; | ||
| _giza_get_filename_for_device(fileName, Dev[id].prefix, 0, GIZA_DEVICE_EXTENSION, 1); | ||
|
|
||
| /* delete the existing mp4 file if it exists */ | ||
| if (access(fileName, F_OK) != -1) | ||
| { | ||
| remove(fileName); | ||
| } | ||
|
|
||
| /* allow the user to change the ffmpeg flags with an environment variable */ | ||
| char *userFlags = getenv("GIZA_FFMPEG_FLAGS"); | ||
| char *flagsToUse = userFlags ? userFlags : GIZA_FFMPEG_FLAGS_DEFAULT; | ||
|
|
||
| /* construct ffmpeg command and repeat it to the user */ | ||
| char command[512]; /* Adjust size as needed */ | ||
| sprintf(command, "ffmpeg -i %s_%%04d.png %s %s", Dev[id].prefix,flagsToUse,fileName); | ||
| _giza_message(command); | ||
|
|
||
| /* issue command and check that it succeeded */ | ||
| int success = system(command); | ||
| if (success != 0) { | ||
| _giza_message("Error: ffmpeg command failed: please install ffmpeg using your package manager"); | ||
| } else { | ||
| char tmp[length + 10]; | ||
| sprintf(tmp, "%s created", fileName); | ||
| _giza_message(tmp); | ||
|
|
||
| /* if the mp4 file exists, clean up the temporary .png files */ | ||
| if (access(fileName, F_OK) != -1) | ||
| { | ||
| for (int i = 0; i <= Dev[id].pgNum; i++) | ||
| { | ||
| _giza_get_filename_for_device(fileName, Dev[id].prefix, i, ".png", 0); | ||
|
|
||
| if (access(fileName, F_OK) != -1) | ||
| { | ||
| if (remove(fileName) != 0) | ||
| { | ||
| printf("Unable to delete %s \n",fileName); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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