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<div dir="ltr" data-setdir="false">I tried using "pipe:" as filename: <br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"> avformat_alloc_output_context2(&ofmt_ctx_pipe, NULL, NULL, "pipe:");<br></div><div><div> if (!ofmt_ctx_pipe) {</div><div> av_log(NULL, AV_LOG_ERROR, "Could not create output context\n");</div><div> return AVERROR_UNKNOWN;</div><div> }</div></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">But it does not seem to work. I get the following error - </div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"> Unable to find a suitable output format for 'pipe:'<br></div><div><div> Could not create output context</div></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Is there some other function I should be using instead of 'avformat_alloc_output_context2'? Or some additional definition I need to use?</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Thanks again,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Hillel </div>
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On Wednesday, March 23, 2022, 05:35:17 PM GMT+2, Hillel Rosensweig via Libav-user <libav-user@ffmpeg.org> wrote:
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<div><br clear="none"></div><div dir="ltr">That is exactly what I meant. Thank you!</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Hillel</div>
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On Wednesday, March 23, 2022, 05:32:18 PM GMT+2, Richard Hussong <rhussong@westpond.com> wrote:
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<div><div id="yiv0580745305"><div><div dir="ltr"><div dir="ltr"><br clear="none"></div><br clear="none"><div class="yiv0580745305gmail_quote"><div dir="ltr" class="yiv0580745305gmail_attr">On Wed, Mar 23, 2022 at 2:53 AM Hillel Rosensweig via Libav-user <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:libav-user@ffmpeg.org" target="_blank" href="mailto:libav-user@ffmpeg.org">libav-user@ffmpeg.org</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="yiv0580745305gmail_quote"><div><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;"><div dir="ltr">Hello all,</div><div dir="ltr"><br clear="none"></div><div dir="ltr">I am trying to output raw video (from file or device) </div><div dir="ltr">packets to stdin so that they can be picked up by </div><div dir="ltr">another program running on my system.</div></div></div></blockquote><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="yiv0580745305gmail_quote"><div><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;"><div dir="ltr"><br clear="none"></div><div dir="ltr">Any suggestions on how to do this?</div><div dir="ltr">For example, can I relate to stdin like a filename and just </div><div dir="ltr">use avformat_alloc_output_context2 and avio_open</div><div dir="ltr">like I would when recording to a file?</div></div></div></blockquote><div> </div><div>Do you mean you want to write output to stdout so it can be piped to another program's stdin? In ffmpeg, they do this by passing the filename "pipe:" to avformat_alloc_output_context2().</div><div><br clear="none"></div><div>If that is not what you meant, you'll need to clarify your question.</div><div id="yiv0580745305yqtfd29170" class="yiv0580745305yqt0918976628"><div><br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="yiv0580745305gmail_quote"><div><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;"><div dir="ltr"><br clear="none"></div></div></div></blockquote><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="yiv0580745305gmail_quote"><div><div style="font-family:Helvetica, Arial, sans-serif;font-size:16px;"><div dir="ltr"><br clear="none"></div><div dir="ltr">I there some code reference which deals with this scenario?</div><div dir="ltr">Thanks!</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Hillel</div></div></div>_______________________________________________<br clear="none">
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