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</o:shapelayout></xml><![endif]--></head><body lang=NL link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>You can’t change this. The encoder needs to start it’s encoding and it needs input for this. However, 58 frames seems like a lot.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>You can try this:<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>av_opt_set(context->priv_data, "tune", "zerolatency", 0);<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>to see if this improves the situation.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Also take a look at this:<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><a href="https://trac.ffmpeg.org/wiki/StreamingGuide#Latency">https://trac.ffmpeg.org/wiki/StreamingGuide#Latency</a><o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><b>Van:</b> Libav-user <libav-user-bounces@ffmpeg.org> <b>Namens </b>Vittalprasad<br><b>Verzonden:</b> donderdag 5 april 2018 11:03<br><b>Aan:</b> libav-user@ffmpeg.org<br><b>Onderwerp:</b> [Libav-user] avcodec_receive_packet output for every input frame<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:white'>At the beginning of encoding, the H264 Encoder is accepting multiple input frames without returning a encoded stream, in my case it is accepting 58 input frames.</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:yellow'>what changes are required at encoder side to get output frame for every input frame, i.e o/p frame for i/p frame iteration?</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black;background:white'>below is encoder code.</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'>ret = avcodec_send_frame(c_enc, frame);</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> if (ret < 0)</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> {</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> fprintf(stderr, "Error sending a frame for encoding\n");</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> exit(1);</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> }</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> while (1) {</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> ret = avcodec_receive_packet(c_enc, pkt);</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> break;</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> else</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'> ///dump encoded packet in to file</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif;background:white'>}</span><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma",sans-serif'><br clear=all></span><br>-- <o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'>Thanks & Regards<br>Vittal Prasad B R<br><br><br><br><o:p></o:p></p></div></div></div></body></html>