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Hi Arthur,<br>
<br>
I don't know if it can help, but I am encoding raw video (no
compression whatsoever) using codec<br>
AV_CODEC_ID_RAWVIDEO with pixformat AV_PIX_FMT_RGB24 in container
.avi file.<br>
<br>
The .avi generated are huge but high quality.<br>
<br>
I too, am looking for some lossless compression but I haven't found
any way yet. I am a newbie to libav. <br>
<span style=" font-style:italic; color:#55ff55;"><font
color="#000000"> </font> </span><br>
Steph<br>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject:
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<td>[Libav-user] Encoding with no compression with OpenH264</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Mon, 7 Mar 2016 14:46:03 -0800</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
<td>Arthur Muller <a class="moz-txt-link-rfc2396E" href="mailto:muller@vki.com"><muller@vki.com></a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Reply-To:
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<td>This list is about using libavcodec, libavformat,
libavutil, libavdevice and libavfilter.
<a class="moz-txt-link-rfc2396E" href="mailto:libav-user@ffmpeg.org"><libav-user@ffmpeg.org></a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:libav-user@ffmpeg.org">libav-user@ffmpeg.org</a></td>
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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I need to create a MP4/OpenH264 file from a
series of images. Because the images are all of a technical
nature, I need to have absolutely no compression. How can I
achieve this with OpenH264?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When I used libx264 I set the number of
b-frames to zero and it worked fine. I’m not sure OpenH264
even supports B frames given the discussion I saw here:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a moz-do-not-send="true"
href="https://github.com/cisco/openh264/issues/1844">https://github.com/cisco/openh264/issues/1844</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If anybody could let me know what
parameters I need to set to prevent any compression and not
skip any frames I would appreciate it.<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>
<p class="MsoNormal"><o:p> </o:p></p>
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