[FFmpeg-user] yuv420p vs yuv420p(tv)

[George R. Welch]

On 9/9/19 9:02 AM, Paul B Mahol wrote:
> On 9/9/19, George R. Welch <george at grwelch.com> wrote:
>> Hi folks,
>>
>> I have two versions of the same video and I would like to only keep
>> one.  If one is higher quality, I'd obviously want to keep that one.  I
>> can't tell tell any difference through casual watching with VLC, so
>> perhaps it does not matter.
>>
>> But anyway, when I run ffmpeg -i on the two, the difference is:
>>
>> <     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
>> 1920x1080, 4011 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
>> ---
>>   >     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661),
>> yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], 4173 kb/s, 29.97 fps, 29.97
>> tbr, 90k tbn, 59.94 tbc (default)
>>
>> I think I understand the difference between yuv420p(pc) and yuv420p(tv),
>> but here I have yuv420p vs yuv420p(tv).
>>
>> Can someone offer suggestions as to which of these two videos might be
>> the better encoding?
> You should not trust anyone giving you such answer by comparing only
> metadata and not actual data.

Thank you.  I should add that I do know that the only difference between 
the videos is the encoding scheme.  Both were produced from the same 
master.  It's just that I don't know what was done (and can't find out 
easily).

My hope was that ffmpeg's output could offer me a clue about the 
encodings of the two, from which I could make an educated guess about 
which one might be better (if either).

If one can't tell from this, I'm happy to flip a coin.  But does anyone 
know the difference between yuv420p and yuv420p(tv).  As opposed to 
yuv420p(pc) vs yuv420p(tv), I mean.

Best,

--George