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ffmpeg: remove some asserts in aspect ratio computations

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Use a default or undefined aspect ratio when ffmpeg won't tell us the
video size, rather than crashing the whole app.
This commit is contained in:
Adrien Destugues 2020-09-20 10:17:49 +02:00
parent d8c41a8ab0
commit 5dbf9531ea
1 changed files with 25 additions and 14 deletions
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39
src/add-ons/media/plugins/ffmpeg/Utilities.h
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@ -14,6 +14,7 @@
#include <assert.h>
#include <stdio.h>
#include <GraphicsDefs.h>
@ -44,13 +45,15 @@ inline void
ConvertAVCodecContextToVideoAspectWidthAndHeight(AVCodecContext& contextIn,
uint16& pixelWidthAspectOut, uint16& pixelHeightAspectOut)
{
assert(contextIn.sample_aspect_ratio.num >= 0);
assert(contextIn.width > 0);
assert(contextIn.height > 0);
if (contextIn.width <= 0 || contextIn.height <= 0) {
fprintf(stderr, "Cannot compute video aspect ratio correctly\n");
pixelWidthAspectOut = 1;
pixelHeightAspectOut = 1;
return;
}
assert(contextIn.sample_aspect_ratio.num >= 0);
// The following code is based on code originally located in
// AVFormatReader::Stream::Init() and thus should be copyrighted to Stephan
// Aßmus
AVRational pixelAspectRatio;
if (contextIn.sample_aspect_ratio.num == 0
@ -80,13 +83,15 @@ inline void
ConvertAVCodecParametersToVideoAspectWidthAndHeight(AVCodecParameters& parametersIn,
uint16& pixelWidthAspectOut, uint16& pixelHeightAspectOut)
{
assert(parametersIn.sample_aspect_ratio.num >= 0);
assert(parametersIn.width > 0);
assert(parametersIn.height > 0);
if (parametersIn.width <= 0 || parametersIn.height <= 0) {
fprintf(stderr, "Cannot compute video aspect ratio correctly\n");
pixelWidthAspectOut = 1;
pixelHeightAspectOut = 1;
return;
}
assert(parametersIn.sample_aspect_ratio.num >= 0);
// The following code is based on code originally located in
// AVFormatReader::Stream::Init() and thus should be copyrighted to Stephan
// Aßmus
AVRational pixelAspectRatio;
if (parametersIn.sample_aspect_ratio.num == 0
@ -136,10 +141,16 @@ inline void
ConvertVideoAspectWidthAndHeightToAVCodecContext(uint16 pixelWidthAspectIn,
uint16 pixelHeightAspectIn, AVCodecContext& contextInOut)
{
if (contextInOut.width <= 0 || contextInOut.height <= 0) {
fprintf(stderr, "Cannot compute video aspect ratio correctly\n");
// We can't do anything, set the aspect ratio to 'ignore'.
contextInOut.sample_aspect_ratio.num = 0;
contextInOut.sample_aspect_ratio.den = 1;
return;
}
assert(pixelWidthAspectIn > 0);
assert(pixelHeightAspectIn > 0);
assert(contextInOut.width > 0);
assert(contextInOut.height > 0);
AVRational pureVideoDimensionAspectRatio;
av_reduce(&pureVideoDimensionAspectRatio.num,