from Barcelona to Sarlat for two weeks by car

Perhaps start with a few days in La Seu d'Urgell, go hiking in the mountains, and check out Andorra.
Then cut across to the coast visiting Vic and Besalu.
L'Escala / Sant Martí d'Empúries would be a good beach stop as you have easy access to Girona, Figueres, Cadaques and Port Lligat. The Greek and Roman ruins at Empuries are worth a look. I also like the beach at Llafranc and Port de la Selva.
Head into France and detour to Carcassonne.
Then a few days in Montpellier, exploring locally if you have the time.
Via the stunning Millau Viaduct to get you to Sarlat.

David from Brisbane,
thank you very much for your information, now we have to plan how to do it, we have 14 days , starting from Barcelona by car and which route to take and where to stay, how many nights in which place , to Sarlat and another way back to Barcelona.

David from Brisbane,
thank you very much for your information, now we have to plan how to do it, we have 14 days , starting from Barcelona by car and which route to take and where to stay, how many nights in which place , to Sarlat and another way back to Barcelona.

You are going to great places, each deserves a few days each. If you are in Sarlat, go down to the Dordogne river to Roc Gagnac then over (another day) to the Cro Magnon cave paintings at Les Eyzies. (research accessibility and reservations first) But don't believe the ugly cave man statue in front of the museum; we were just as good looking then as now!

Carol.
Thank you too for your information

If you're not visiting Andorra, when going to France consider visiting Rick's back door village of Cucugnan - a charming ville in the land of the Cathars with a windmill that grinds the flour for the bakery in its base. The Auberge des Vignerons is a nice, small hotel; if you stay, sample the cassoulet in the restaurant. Another nice off the beaten path place I'd recommend is to visit some of the bastide towns west of Albi. Puycelci is a gem and the restaurant attached to the hotel Auberge Ancienne serves creative meals from the terroir.

La Seu d'Urgell - 3 nts
Vic/Besalu - 1 nt
Costa Brava - 3 nts
Montpellier - 2 nts
Sarlat/Dordogne - 4 nts
Carcassonne - 1 nt