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List: gstreamer-devel
Subject: AW: h264parse element needed to play video in VLC after encoding with nvh264enc
From: "Thornton, Keith" <keith.thornton () zeiss ! com>
Date: 2019-09-30 9:32:12
Message-ID: VI1P190MB0590D40DE3DE625C330A23928C820 () VI1P190MB0590 ! EURP190 ! PROD ! OUTLOOK ! COM
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HI,
without the h264parse element, your encoder will deliver byte-stream format. Most \
players like to play h264 / mp4 files in avc format. The h264parse will convert from \
byte-stream to avc. Gruesse
Von: gstreamer-devel <gstreamer-devel-bounces@lists.freedesktop.org> Im Auftrag von \
Serhan Gül
Gesendet: Montag, 30. September 2019 11:16
An: gstreamer-devel@lists.freedesktop.org
Betreff: h264parse element needed to play video in VLC after encoding with nvh264enc
Hi,
I'm encoding a YUV video to H.264 using nvh264enc. When I use the first pipeline \
blow, the encoding works but I cannot play the MP4 file in VLC 3.0.8 (Ubuntu 18.04) \
but only using the Videos application of Ubuntu. However, when I add a h264parse \
element between nvh264enc and filesink, as in the second pipeline, I can play the \
video without a problem in VLC. Any ideas why this is happening? I don't really \
understand why I need the parser element h264parse after the encoder
> gst-launch-1.0 -v filesrc location=BQTerrace_1920x1080_60.yuv ! rawvideoparse \
> format=i420 width=1920 height=1080 ! nvh264enc ! filesink \
> location=BQTerrace_1920x1080_60.mp4
> gst-launch-1.0 -v filesrc location=BQTerrace_1920x1080_60.yuv ! rawvideoparse \
> format=i420 width=1920 height=1080 ! nvh264enc ! h264parse ! filesink \
> location=BQTerrace_1920x1080_60.mp4
Actually I was expecting to put a mp4mux element between nvh264enc and filesrc but if \
I do that, I get the error: "WARNING: erroneous pipeline: could not link nvh264enc0 \
to mp4mux0". If I use x264enc, the pipeline works though.
Thanks,
Serhan
--
Serhan Gül
serhan@fastmail.com<mailto:serhan@fastmail.com>
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<p class="MsoNormal"><span \
style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US">HI,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US">without \
the h264parse element, your encoder will deliver byte-stream format. Most players \
like to play h264 / mp4 files in avc format. The h264parse will convert from \
byte-stream to avc.<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" \
style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-US">Gruesse<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" \
style="mso-fareast-language:EN-US"><o:p> </o:p></span></p> <div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b>Von:</b> gstreamer-devel \
<gstreamer-devel-bounces@lists.freedesktop.org> <b>Im Auftrag von </b>Serhan \
Gül<br> <b>Gesendet:</b> Montag, 30. September 2019 11:16<br>
<b>An:</b> gstreamer-devel@lists.freedesktop.org<br>
<b>Betreff:</b> h264parse element needed to play video in VLC after encoding with \
nvh264enc<o:p></o:p></p> </div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Hi,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I'm encoding a YUV video to H.264 using nvh264enc. When I use \
the first pipeline blow, the encoding works but I cannot play the MP4 file in VLC \
3.0.8 (Ubuntu 18.04) but only using the Videos application of Ubuntu. However, when I \
add a h264parse element between nvh264enc and filesink, as in the second pipeline, I \
can play the video without a problem in VLC. Any ideas why this is happening? I \
don't really understand why I need the parser element h264parse after the \
encoder<o:p></o:p></p> </div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">> gst-launch-1.0 -v filesrc \
location=BQTerrace_1920x1080_60.yuv ! rawvideoparse format=i420 width=1920 \
height=1080 ! nvh264enc ! filesink location=BQTerrace_1920x1080_60.mp4<o:p></o:p></p> \
</div> <div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">> gst-launch-1.0 -v filesrc \
location=BQTerrace_1920x1080_60.yuv ! rawvideoparse format=i420 width=1920 \
height=1080 ! nvh264enc ! <b>h264parse</b> ! filesink \
location=BQTerrace_1920x1080_60.mp4<o:p></o:p></p> </div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Actually I was expecting to put a mp4mux element between \
nvh264enc and filesrc but if I do that, I get the error: "WARNING: erroneous \
pipeline: could not link nvh264enc0 to mp4mux0". If I use x264enc, the \
pipeline works though.<o:p></o:p></p> </div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Serhan<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div id="sig67116920">
<div>
<p class="MsoNormal">-- <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> Serhan Gül<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <a \
href="mailto:serhan@fastmail.com">serhan@fastmail.com</a><o:p></o:p></p> </div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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