<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am using the API version of ffmpeg. I have a sequence of 30 png files and want to generate a mp4 slide show with no loss (if possible).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In the command line, I use<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>ffmpeg_g -framerate 10 -start_number 1 -i image%02d.png -c:v mpeg4 -q:v 1 file.mp4<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>and the resulting file has good quality. Using the API version of ffmpeg I’ve managed to generate the mp4 file by first converting the png files to yuv format. That was not a problem. But I haven’t figured out what I have to do in my code to mimic the behavior of “-q:v 1” to get the better quality?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Can anybody help?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-Arthur<o:p></o:p></p></div></body></html>