H.264 in MPEG-TS to MP4: cropped video
Posted: 06 Jul 2009 20:15
Hello,
I've been trying to use VLC to convert an MPEG-TS file into an MP4 file, without re-encoding the content. The content of the MPEG-TS file is H.264 for the video and AAC for the audio track; such a file can be obtained by recording a low bitrate ("bas debit") channel on a Freebox from free.fr.
I'm changing the encapsulation either using the GUI (streaming/exporting wizard, no re-encoding and MP4 container) or using this command:
In both cases, the resulting video is cropped to something much smaller than the original: 16x80 instead of 480x576 using VLC 0.9.9 (both Linux and OSX) and the whole width but only about half of the height using the latest VLC nightly build for OSX (vlc-git-intel-20090701-0011.zip).
I've tried to force the width and height parameters in ":sout=#std{mux=mp4,width=480,height=576,access=file,dst=vlc-output.mp4}", but it didn't change anything.
Is this a known issue? Is there a way to fix this? I presume this is a matter of headers somewhere in the files, since the actual streams are actually present.
The workaround I've found relies on mp4creator and MP4Box:
Thanks.
Bruno.
I've been trying to use VLC to convert an MPEG-TS file into an MP4 file, without re-encoding the content. The content of the MPEG-TS file is H.264 for the video and AAC for the audio track; such a file can be obtained by recording a low bitrate ("bas debit") channel on a Freebox from free.fr.
I'm changing the encapsulation either using the GUI (streaming/exporting wizard, no re-encoding and MP4 container) or using this command:
Code: Select all
vlc -I dummy test.ts ":sout=#std{mux=mp4,access=file,dst=vlc-output.mp4}" vlc://quitI've tried to force the width and height parameters in ":sout=#std{mux=mp4,width=480,height=576,access=file,dst=vlc-output.mp4}", but it didn't change anything.
Is this a known issue? Is there a way to fix this? I presume this is a matter of headers somewhere in the files, since the actual streams are actually present.
The workaround I've found relies on mp4creator and MP4Box:
Code: Select all
mp4creator --extract=1 vlc-output.mp4
mp4creator --extract=2 vlc-output.mp4
mv vlc-output.mp4.t1 vlc-output.aac
mv vlc-output.mp4.t2 vlc-output.h264
MP4Box -mpeg4 -add vlc-output.h264 -add vlc-output.aac output.mp4Bruno.