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</style></head><body style="font-family:'DejaVu Sans'; font-size:8pt; font-weight:400; font-style:normal;">Hi all,<br>
<br>
Well so I can expect hw accel for ENcoding to work. What's about DEcoding? Can that be enabled as well?<br>
<br>
Is it correct that direct raw copying (no de- and re-encoding) is not possible? Would be soooo nice (speedup & image quality) for all the clips which rest unchanged! I know that this is a missing feature on the mlt side; having a background in programming myself I know how ugly a workaround can be, but: did you dev's discuss that in the past? As I said, only for unchanged clips (I have 4K editing in mind...)<br>
<br>
Best,<br>
Bernd<br>
<br>
PS: I will see how to compile ffmpeg with hw accel enabled.<br><br><div class="gmail_quote">Am 8. August 2017 14:31:13 MESZ schrieb Vincent Pinon <vpinon@kde.org>:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Hello,</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"> </p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Note that you need to have FFmpeg built with vaapi or nvenc support, which is not the case of Debian package.</p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">I don't know what's needed for Intel, but for NVidia you have to download a SDK linked to closed-source driver, providing personal information: showstopper for me (and many packagers) :\</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"> </p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Please let us know of any progress on your side.</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"> </p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Evert, did you try to share your custom profiles using "HotNewStuff" function in Kdenlive? ;)</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"> </p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Vincent</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"> </p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Le mardi 8 août 2017, 12:47:31 CEST Evert Vorster a écrit :<br /></p>
<p style="margin-top:12px; margin-bottom:0px; margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Hi there, Bernd. <br /><br /></p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Kdenlive supports hardware encoding through custom encoding profiles. <br /></p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">This is my profile for hardware hevc encoding with nvidia:<br /></p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">properties=x265-medium f=matroska vcodec=hevc_nvenc acodec=aac crf=%quality ab=%audiobitrate+'k'</p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br /></p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">It would have been awesome if mlt and ffmpeg used the same format in command lines, but this is not the case. At least they are close. <br /></p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Unfortunately I only have intel cards, so I cannot test the intel vaapi acelleration for you. </p>
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<p style="margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Kind regards,</p>
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<p style="margin-top:0px; margin-bottom:0px; margin-left:40px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">On 8 August 2017 at 10:35, B.M. <<a href="mailto:b-misc@gmx.ch"><span style="text-decoration: underline; color:#508ed8;">b-misc@gmx.ch</span></a>> wrote:<br /></p>
<p style="margin-top:0px; margin-bottom:0px; margin-left:45px; margin-right:40px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Dear all,<br /><br />After some years without I'm getting back to video editing... I already searched quite a lot but it's really hard to find "realiable" information, so I decided to ask here:<br /><br />- It seems that hw accel is not available in kdenlive <br /><br />- As far as I understand kdenlive uses mlt which uses ffmpeg. ffpmeg can use hardware acceleration for de- and encoding. So is mlt to "blame" for missing hw accel. in kdenlive?<br /><br />- There has been a patch (bug 378832) "use of vaapi in transcoding and rendering" which seems to tackle my question. But what did it really change -<br />/ what is it for? I didn't find more info on that and it's in kdenlive 17.04, while Debian is at 16.12. and before I compile myself I'd like to get more info.<br /><br />- Furthermore I found a thread on this list back in April "kdenlive and mlt nvenc enabled" covering the same topic but for nvidia instead of Intel graphics; unfortunately nobody reported back if it really works. For me it reads like the patch I mentioned above.<br /><br />So regarding the current state of hw accel in kdenlive I'm still uncertain.<br /><br />Thank you for your inputs.<br /><br />Kind regards<br />Bernd </p>
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