How can I edit timestamps of MP4 videos?
It turned out to be a problem with Picasa, not the files themselves. When I temporarily renamed them (so that they disappeared from Picasa), then updated their timestamp and renamed them back, Picasa imported them again with the correct date and time info.
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crypto_rsa
Updated on September 18, 2022Comments
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crypto_rsa almost 2 years
I am having difficulties with timestamps of my videos. They were originally created with Windows Movie Maker in WMV format and I manually set their creation date. Later I migrated to Ubuntu and converted all of them to MP4 format using the avconv program. The problem is that Picasa (in Ubuntu) is ignoring the timestamp of the MP4 file (which I can set to whatever I want) and is still reporting the original conversion date and time. Is it some kind of MP4 metadata? How can I view/edit it?
EDIT: As an example, I converted ZOO.wmv to ZOO.mp4 using
avconv -i ZOO.wmv -strict experimental -b:v 2000k ZOO.mp4.Mediainfo of the original WMV file:
General Complete name : ZOO.wmv Format : Windows Media File size : 24.5 MiB Duration : 1mn 39s Overall bit rate mode : Constant Overall bit rate : 2 074 Kbps Maximum Overall bit rate : 2 079 Kbps Movie name : ZOO Encoded date : UTC 2010-09-27 21:08:25.781 Application : Windows Movie Maker 2.1.4028.0 Video ID : 2 Format : VC-1 Format profile : MP@ML Codec ID : WMV3 Codec ID/Info : Windows Media Video 9 Codec ID/Hint : WMV3 Description of the codec : Windows Media Video 9 - Professional Duration : 1mn 39s Bit rate mode : Constant Bit rate : 1 900 Kbps Width : 720 pixels Height : 576 pixels Display aspect ratio : 5:4 Frame rate : 25.000 fps Standard : PAL Bit depth : 8 bits Scan type : Progressive Compression mode : Lossy Bits/(Pixel*Frame) : 0.183 Stream size : 22.5 MiB (92%) Language : Czech Audio ID : 1 Format : WMA Format version : Version 2 Codec ID : 161 Codec ID/Info : Windows Media Audio Description of the codec : Windows Media Audio 9.2 - 160 kbps, 44 kHz, stereo (A/V) 1-pass CBR Duration : 1mn 39s Bit rate mode : Constant Bit rate : 160 Kbps Channel(s) : 2 channels Sampling rate : 44.1 KHz Bit depth : 16 bits Stream size : 1.89 MiB (8%) Language : CzechNotice that the Encoded date was set by Windows Movie Maker and it is not the timestamp of the file creation (set manually in Windows).
Mediainfo of the converted MP4 file:
General Complete name : ZOO.mp4 Format : MPEG-4 Format profile : Base Media Codec ID : isom File size : 26.0 MiB Duration : 1mn 39s Overall bit rate mode : Variable Overall bit rate : 2 196 Kbps Movie name : ZOO Writing application : Lavf53.21.0 Video ID : 1 Format : MPEG-4 Visual Format profile : Simple@L1 Format settings, BVOP : No Format settings, QPel : No Format settings, GMC : No warppoints Format settings, Matrix : Default (H.263) Codec ID : 20 Duration : 1mn 39s Bit rate : 2 008 Kbps Width : 720 pixels Height : 576 pixels Display aspect ratio : 5:4 Frame rate mode : Constant Frame rate : 25.000 fps Standard : PAL Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Compression mode : Lossy Bits/(Pixel*Frame) : 0.194 Stream size : 23.7 MiB (91%) Writing library : Lavc53.35.0 Language : Czech Audio ID : 2 Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Codec ID : 40 Duration : 1mn 39s Bit rate mode : Variable Bit rate : 184 Kbps Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 44.1 KHz Compression mode : Lossy Stream size : 2.18 MiB (8%) Language : Czech-
crypto_rsa about 12 yearsavconv -i <input file> -strict experimental -b:v 2000k <output file>. Mediainfo does not output any date or time info for the MP4 files.
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slhck about 12 yearsOkay, interesting. Your MP4 file has no temporal information whatsoever associated to it. How are you changing the timestamp of the MP4? Through Ubuntu's GUI? And it's still reporting the Windows timestamp?
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slhck about 12 yearsInteresting. Good to know – that caused me some headache yesterday because I couldn't figure out where the problem was :)