AW: h264parse element needed to play video in VLC after encoding with nvh264enc

[Thornton, Keith]

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 at lists.freedesktop.org> Im Auftrag von Serhan Gül
Gesendet: Montag, 30. September 2019 11:16
An: gstreamer-devel at 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 at fastmail.com<mailto:serhan at fastmail.com>


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