How to set sample_aspect_ratio while muxing a video stream?
I am trying to mux a video stream and an audio stream into an mp4 file, whereas the target file has an inappropriate sar (unlike the source one).
The following methods don't make any sense.
1、Using avcodec_copy_context(). It cannot set the target sar as the source.
2、Setting sar directly of the target stream. The target sar is not the one I've set in the video stream before writeHeader.
The version I used is 2.8.1.
ffmpeg mux sar
asked Nov 21 at 4:51
li hu
185
add a comment |
I am trying to mux a video stream and an audio stream into an mp4 file, whereas the target file has an inappropriate sar (unlike the source one).
The following methods don't make any sense.
1、Using avcodec_copy_context(). It cannot set the target sar as the source.
2、Setting sar directly of the target stream. The target sar is not the one I've set in the video stream before writeHeader.
The version I used is 2.8.1.
ffmpeg mux sar
asked Nov 21 at 4:51
li hu
185
Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
– the kamilz
Nov 23 at 9:00
Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
– li hu
Nov 27 at 3:10
add a comment |
I am trying to mux a video stream and an audio stream into an mp4 file, whereas the target file has an inappropriate sar (unlike the source one).
The following methods don't make any sense.
1、Using avcodec_copy_context(). It cannot set the target sar as the source.
2、Setting sar directly of the target stream. The target sar is not the one I've set in the video stream before writeHeader.
The version I used is 2.8.1.
ffmpeg mux sar
asked Nov 21 at 4:51
li hu
185
I am trying to mux a video stream and an audio stream into an mp4 file, whereas the target file has an inappropriate sar (unlike the source one).
The following methods don't make any sense.
1、Using avcodec_copy_context(). It cannot set the target sar as the source.
2、Setting sar directly of the target stream. The target sar is not the one I've set in the video stream before writeHeader.
The version I used is 2.8.1.
ffmpeg mux sar
ffmpeg mux sar
asked Nov 21 at 4:51
li hu
185
asked Nov 21 at 4:51
li hu
185
edited Nov 27 at 3:12
asked Nov 21 at 4:51
li hu
185
asked Nov 21 at 4:51
li hu
185
asked Nov 21 at 4:51
li hu
185
185
Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
– the kamilz
Nov 23 at 9:00
Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
– li hu
Nov 27 at 3:10
add a comment |
Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
– the kamilz
Nov 23 at 9:00
Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
– li hu
Nov 27 at 3:10
Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
– the kamilz
Nov 23 at 9:00
Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
– the kamilz
Nov 23 at 9:00
Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
– li hu
Nov 27 at 3:10
Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
– li hu
Nov 27 at 3:10
add a comment |
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53405445%2fhow-to-set-sample-aspect-ratio-while-muxing-a-video-stream%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
active
oldest
votes
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53405445%2fhow-to-set-sample-aspect-ratio-while-muxing-a-video-stream%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
– the kamilz
Nov 23 at 9:00
Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
– li hu
Nov 27 at 3:10